taosdemo.c

/*
 * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
 *
 * This program is free software: you can use, redistribute, and/or modify
 * it under the terms of the GNU Affero General Public License, version 3
 * or later ("AGPL"), as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */


/*
   when in some thread query return error, thread don't exit, but return, otherwise coredump in other thread.
*/

#define _GNU_SOURCE
#define CURL_STATICLIB

#ifdef LINUX
  #include <argp.h>
  #include <inttypes.h>
  #ifndef _ALPINE
    #include <error.h>
  #endif
  #include <pthread.h>
  #include <semaphore.h>
  #include <stdbool.h>
  #include <stdio.h>
  #include <string.h>
  #include <sys/time.h>
  #include <time.h>
  #include <unistd.h>
  #include <wordexp.h>
  #include <regex.h>
#else  
  #include <regex.h>
  #include <stdio.h>
#endif  

#include <assert.h>
#include <stdlib.h>
#include "cJSON.h"

#include "os.h"
#include "taos.h"
#include "taoserror.h"
#include "tutil.h"

#define REQ_EXTRA_BUF_LEN   1024
#define RESP_BUF_LEN        4096

extern char configDir[];

#define INSERT_JSON_NAME      "insert.json"
#define QUERY_JSON_NAME       "query.json"
#define SUBSCRIBE_JSON_NAME   "subscribe.json"

enum TEST_MODE {
    INSERT_TEST,            // 0
    QUERY_TEST,             // 1
    SUBSCRIBE_TEST,         // 2
    INVAID_TEST
};

#define MAX_SQL_SIZE       65536
#define BUFFER_SIZE        (65536*2)
#define MAX_DB_NAME_SIZE   64
#define MAX_TB_NAME_SIZE   64
#define MAX_DATA_SIZE      16000
#define MAX_NUM_DATATYPE   10
#define OPT_ABORT          1 /* –abort */
#define STRING_LEN         60000
#define MAX_PREPARED_RAND  1000000
#define MAX_FILE_NAME_LEN  256

#define   MAX_SAMPLES_ONCE_FROM_FILE   10000
#define   MAX_NUM_DATATYPE 10

#define   MAX_DB_COUNT           8
#define   MAX_SUPER_TABLE_COUNT  8
#define   MAX_COLUMN_COUNT       1024
#define   MAX_TAG_COUNT          128

#define   MAX_QUERY_SQL_COUNT    10
#define   MAX_QUERY_SQL_LENGTH   256

#define   MAX_DATABASE_COUNT     256
#define INPUT_BUF_LEN   256

#define DEFAULT_TIMESTAMP_STEP  10

typedef enum CREATE_SUB_TALBE_MOD_EN {
  PRE_CREATE_SUBTBL,
  AUTO_CREATE_SUBTBL,
  NO_CREATE_SUBTBL
} CREATE_SUB_TALBE_MOD_EN;
  
typedef enum TALBE_EXISTS_EN {
  TBL_ALREADY_EXISTS,
  TBL_NO_EXISTS,
  TBL_EXISTS_BUTT
} TALBE_EXISTS_EN;

enum MODE {
  SYNC, 
  ASYNC,
  MODE_BUT
};

typedef enum enum_INSERT_MODE {
    PROGRESSIVE_INSERT_MODE,
    INTERLACE_INSERT_MODE,
    INVALID_INSERT_MODE
} INSERT_MODE;

enum QUERY_TYPE {
  NO_INSERT_TYPE,
  INSERT_TYPE, 
  QUERY_TYPE_BUT
} ;  

enum _show_db_index {
  TSDB_SHOW_DB_NAME_INDEX,
  TSDB_SHOW_DB_CREATED_TIME_INDEX,
  TSDB_SHOW_DB_NTABLES_INDEX,
  TSDB_SHOW_DB_VGROUPS_INDEX,
  TSDB_SHOW_DB_REPLICA_INDEX,
  TSDB_SHOW_DB_QUORUM_INDEX,  
  TSDB_SHOW_DB_DAYS_INDEX,
  TSDB_SHOW_DB_KEEP_INDEX,
  TSDB_SHOW_DB_CACHE_INDEX,
  TSDB_SHOW_DB_BLOCKS_INDEX,
  TSDB_SHOW_DB_MINROWS_INDEX,
  TSDB_SHOW_DB_MAXROWS_INDEX,
  TSDB_SHOW_DB_WALLEVEL_INDEX,
  TSDB_SHOW_DB_FSYNC_INDEX,
  TSDB_SHOW_DB_COMP_INDEX,
  TSDB_SHOW_DB_CACHELAST_INDEX,
  TSDB_SHOW_DB_PRECISION_INDEX,  
  TSDB_SHOW_DB_UPDATE_INDEX,
  TSDB_SHOW_DB_STATUS_INDEX,
  TSDB_MAX_SHOW_DB
};

// -----------------------------------------SHOW TABLES CONFIGURE -------------------------------------
enum _show_stables_index {
  TSDB_SHOW_STABLES_NAME_INDEX,
  TSDB_SHOW_STABLES_CREATED_TIME_INDEX,
  TSDB_SHOW_STABLES_COLUMNS_INDEX,
  TSDB_SHOW_STABLES_METRIC_INDEX,  
  TSDB_SHOW_STABLES_UID_INDEX,  
  TSDB_SHOW_STABLES_TID_INDEX,
  TSDB_SHOW_STABLES_VGID_INDEX,  
  TSDB_MAX_SHOW_STABLES
};

enum _describe_table_index {
  TSDB_DESCRIBE_METRIC_FIELD_INDEX,
  TSDB_DESCRIBE_METRIC_TYPE_INDEX,
  TSDB_DESCRIBE_METRIC_LENGTH_INDEX,
  TSDB_DESCRIBE_METRIC_NOTE_INDEX,
  TSDB_MAX_DESCRIBE_METRIC
};

typedef struct {
  char field[TSDB_COL_NAME_LEN + 1];
  char type[16];
  int length;
  char note[128];
} SColDes;

/* Used by main to communicate with parse_opt. */
typedef struct SArguments_S {
  char *   metaFile;
  int      test_mode;
  char *   host;
  uint16_t port;
  char *   user;
  char *   password;
  char *   database;
  int      replica;
  char *   tb_prefix;
  char *   sqlFile;
  bool     use_metric;
  bool     insert_only;
  bool     answer_yes;
  bool     debug_print;
  bool     verbose_print;
  char *   output_file;
  int      mode;
  char *   datatype[MAX_NUM_DATATYPE + 1];
  int      len_of_binary;
  int      num_of_CPR;
  int      num_of_threads;
  int      insert_interval;
  int      rows_per_tbl;
  int      num_of_RPR;
  int      max_sql_len;
  int      num_of_tables;
  int      num_of_DPT;
  int      abort;
  int      disorderRatio;
  int      disorderRange;
  int      method_of_delete;
  char **  arg_list;
  int64_t  totalInsertRows;
  int64_t  totalAffectedRows;
} SArguments;

typedef struct SColumn_S {
  char  field[TSDB_COL_NAME_LEN + 1];
  char  dataType[MAX_TB_NAME_SIZE];
  int   dataLen;
  char  note[128];  
} StrColumn;

typedef struct SSuperTable_S {
  char         sTblName[MAX_TB_NAME_SIZE+1];
  int          childTblCount;
  bool         superTblExists;    // 0: no, 1: yes
  bool         childTblExists;    // 0: no, 1: yes  
  int          batchCreateTableNum;  // 0: no batch,  > 0: batch table number in one sql
  int8_t       autoCreateTable;                  // 0: create sub table, 1: auto create sub table
  char         childTblPrefix[MAX_TB_NAME_SIZE];
  char         dataSource[MAX_TB_NAME_SIZE+1];  // rand_gen or sample
  char         insertMode[MAX_TB_NAME_SIZE];  // taosc, restful
  int           childTblLimit;
  int           childTblOffset;

  int          multiThreadWriteOneTbl;   // 0: no, 1: yes
  int          rowsPerTbl;               // 
  int          disorderRatio;            // 0: no disorder, >0: x%
  int          disorderRange;            // ms or us by database precision
  int          maxSqlLen;                // 

  int          insertInterval;          // insert interval, will override global insert interval
  int64_t      insertRows;               // 0: no limit
  int          timeStampStep;
  char         startTimestamp[MAX_TB_NAME_SIZE];  // 
  char         sampleFormat[MAX_TB_NAME_SIZE];  // csv, json
  char         sampleFile[MAX_FILE_NAME_LEN+1];
  char         tagsFile[MAX_FILE_NAME_LEN+1];

  int          columnCount;
  StrColumn    columns[MAX_COLUMN_COUNT];
  int          tagCount;
  StrColumn    tags[MAX_TAG_COUNT];

  char*        childTblName;
  char*        colsOfCreateChildTable;
  int          lenOfOneRow;
  int          lenOfTagOfOneRow;

  char*        sampleDataBuf;
  int          sampleDataBufSize;
  //int          sampleRowCount;
  //int          sampleUsePos;

  int          tagSource;    // 0: rand, 1: tag sample
  char*        tagDataBuf;
  int          tagSampleCount;
  int          tagUsePos;

  // statistics  
  int64_t    totalInsertRows;
  int64_t    totalAffectedRows;
} SSuperTable;

typedef struct {
  char     name[TSDB_DB_NAME_LEN + 1];
  char     create_time[32];
  int32_t  ntables;
  int32_t  vgroups;  
  int16_t  replica;
  int16_t  quorum;
  int16_t  days;  
  char     keeplist[32];
  int32_t  cache; //MB
  int32_t  blocks;
  int32_t  minrows;
  int32_t  maxrows;
  int8_t   wallevel;
  int32_t  fsync;
  int8_t   comp;
  int8_t   cachelast;
  char     precision[8];   // time resolution
  int8_t   update;
  char     status[16];
} SDbInfo;

typedef struct SDbCfg_S { 
//  int       maxtablesPerVnode;
  int       minRows; 
  int       maxRows;
  int       comp;
  int       walLevel;
  int       cacheLast;
  int       fsync;  
  int       replica;
  int       update;
  int       keep;
  int       days;
  int       cache;
  int       blocks;
  int       quorum;
  char      precision[MAX_TB_NAME_SIZE];  
} SDbCfg;

typedef struct SDataBase_S {
  char         dbName[MAX_DB_NAME_SIZE];
  int          drop;  // 0: use exists, 1: if exists, drop then new create
  SDbCfg       dbCfg;
  int          superTblCount;
  SSuperTable  superTbls[MAX_SUPER_TABLE_COUNT];
} SDataBase;

typedef struct SDbs_S {
  char         cfgDir[MAX_FILE_NAME_LEN+1];
  char         host[MAX_DB_NAME_SIZE];
  uint16_t     port;
  char         user[MAX_DB_NAME_SIZE];
  char         password[MAX_DB_NAME_SIZE];
  char         resultFile[MAX_FILE_NAME_LEN+1];
  bool         use_metric;
  bool         insert_only;
  bool         do_aggreFunc;
  bool         queryMode;
  
  int          threadCount;
  int          threadCountByCreateTbl;
  int          dbCount;
  SDataBase    db[MAX_DB_COUNT];

  // statistics
  int64_t    totalInsertRows;
  int64_t    totalAffectedRows;

} SDbs;

typedef struct SuperQueryInfo_S {
  int          rate;  // 0: unlimit  > 0   loop/s
  int          concurrent;
  int          sqlCount;
  int          subscribeMode; // 0: sync, 1: async
  int          subscribeInterval; // ms
  int          subscribeRestart;
  int          subscribeKeepProgress;
  char         sql[MAX_QUERY_SQL_COUNT][MAX_QUERY_SQL_LENGTH+1];  
  char         result[MAX_QUERY_SQL_COUNT][MAX_FILE_NAME_LEN+1];
  TAOS_SUB*    tsub[MAX_QUERY_SQL_COUNT];
} SuperQueryInfo;

typedef struct SubQueryInfo_S {
  char         sTblName[MAX_TB_NAME_SIZE+1];
  int          rate;  // 0: unlimit  > 0   loop/s
  int          threadCnt;  
  int          subscribeMode; // 0: sync, 1: async
  int          subscribeInterval; // ms
  int          subscribeRestart;
  int          subscribeKeepProgress;
  int          childTblCount;
  char         childTblPrefix[MAX_TB_NAME_SIZE];
  int          sqlCount;
  char         sql[MAX_QUERY_SQL_COUNT][MAX_QUERY_SQL_LENGTH+1];  
  char         result[MAX_QUERY_SQL_COUNT][MAX_FILE_NAME_LEN+1];
  TAOS_SUB*    tsub[MAX_QUERY_SQL_COUNT];
  
  char*        childTblName;
} SubQueryInfo;

typedef struct SQueryMetaInfo_S {
  char         cfgDir[MAX_FILE_NAME_LEN+1];
  char         host[MAX_DB_NAME_SIZE];
  uint16_t     port;
  char         user[MAX_DB_NAME_SIZE];
  char         password[MAX_DB_NAME_SIZE];
  char         dbName[MAX_DB_NAME_SIZE+1];
  char         queryMode[MAX_TB_NAME_SIZE];  // taosc, restful

  SuperQueryInfo  superQueryInfo;
  SubQueryInfo    subQueryInfo;  
} SQueryMetaInfo;

typedef struct SThreadInfo_S {
  TAOS *taos;
  int threadID;
  char db_name[MAX_DB_NAME_SIZE+1];
  char fp[4096];
  char tb_prefix[MAX_TB_NAME_SIZE];
  int start_table_from;
  int end_table_to;
  int ntables;
  int data_of_rate;
  uint64_t start_time;  
  char* cols;  
  bool  use_metric;  
  SSuperTable* superTblInfo;

  // for async insert
  tsem_t lock_sem;
  int64_t  counter;  
  uint64_t  st;
  uint64_t  et;
  int64_t  lastTs;

  // sample data
  int samplePos;
  // statistics
  int64_t totalInsertRows;
  int64_t totalAffectedRows;

  // insert delay statistics
  int64_t cntDelay;
  int64_t totalDelay;
  int64_t avgDelay;
  int64_t maxDelay;
  int64_t minDelay;
  
} threadInfo;

#ifdef WINDOWS
#define _CRT_RAND_S

#include <windows.h>
#include <winsock2.h>

typedef unsigned __int32 uint32_t;

#pragma comment ( lib, "ws2_32.lib" )
// Some old MinGW/CYGWIN distributions don't define this:
#ifndef ENABLE_VIRTUAL_TERMINAL_PROCESSING
  #define ENABLE_VIRTUAL_TERMINAL_PROCESSING  0x0004
#endif // ENABLE_VIRTUAL_TERMINAL_PROCESSING

static HANDLE g_stdoutHandle;
static DWORD g_consoleMode;

void setupForAnsiEscape(void) {
  DWORD mode = 0;
  g_stdoutHandle = GetStdHandle(STD_OUTPUT_HANDLE);

  if(g_stdoutHandle == INVALID_HANDLE_VALUE) {
    exit(GetLastError());
  }

  if(!GetConsoleMode(g_stdoutHandle, &mode)) {
    exit(GetLastError());
  }

  g_consoleMode = mode;

  // Enable ANSI escape codes
  mode |= ENABLE_VIRTUAL_TERMINAL_PROCESSING;

  if(!SetConsoleMode(g_stdoutHandle, mode)) {
    exit(GetLastError());
  }    
}

void resetAfterAnsiEscape(void) {
  // Reset colors
  printf("\x1b[0m");    

  // Reset console mode
  if(!SetConsoleMode(g_stdoutHandle, g_consoleMode)) {
    exit(GetLastError());
  }
}

int taosRandom()
{
    int number;
    rand_s(&number);

    return number;
}
#else
void setupForAnsiEscape(void) {}

void resetAfterAnsiEscape(void) {
  // Reset colors
  printf("\x1b[0m");
}

int taosRandom()
{
    return random();
}

#endif

static int createDatabases();
static void createChildTables();
static int queryDbExec(TAOS *taos, char *command, int type);

/* ************ Global variables ************  */

int32_t  randint[MAX_PREPARED_RAND];
int64_t  randbigint[MAX_PREPARED_RAND];
float    randfloat[MAX_PREPARED_RAND];
double   randdouble[MAX_PREPARED_RAND];
char *aggreFunc[] = {"*", "count(*)", "avg(col0)", "sum(col0)", 
    "max(col0)", "min(col0)", "first(col0)", "last(col0)"};

SArguments g_args = {
                     NULL,            // metaFile
                     0,               // test_mode
                     "127.0.0.1",     // host
                     6030,            // port
                     "root",          // user
                     #ifdef _TD_POWER_ 
                     "powerdb",      // password
                     #else
                     "taosdata",      // password
                     #endif
                     "test",          // database
                     1,               // replica
                     "t",             // tb_prefix
                     NULL,            // sqlFile
                     false,           // use_metric
                     false,           // insert_only
                     false,           // debug_print
                     false,           // verbose_print
                     false,           // answer_yes;
                     "./output.txt",  // output_file
                     0,               // mode : sync or async
                     {
                     "TINYINT",           // datatype
                     "SMALLINT",
                     "INT",
                     "BIGINT",
                     "FLOAT",
                     "DOUBLE",
                     "BINARY",
                     "NCHAR",
                     "BOOL",
                     "TIMESTAMP"
                     },
                     16,              // len_of_binary
                     10,              // num_of_CPR
                     10,              // num_of_connections/thread
                     0,               // insert_interval
                     0,               // rows_per_tbl;
                     100,             // num_of_RPR
                     TSDB_PAYLOAD_SIZE,  // max_sql_len
                     10000,           // num_of_tables
                     10000,           // num_of_DPT
                     0,               // abort
                     0,               // disorderRatio
                     1000,            // disorderRange
                     1,               // method_of_delete
                     NULL             // arg_list
};



static SDbs            g_Dbs;
static int             g_totalChildTables = 0;
static SQueryMetaInfo  g_queryInfo;
static FILE *          g_fpOfInsertResult = NULL;

#define debugPrint(fmt, ...) \
    do { if (g_args.debug_print || g_args.verbose_print) \
      fprintf(stderr, "DEBG: "fmt, __VA_ARGS__); } while(0)
#define verbosePrint(fmt, ...) \
    do { if (g_args.verbose_print) \
        fprintf(stderr, "VERB: "fmt, __VA_ARGS__); } while(0)

///////////////////////////////////////////////////

void printHelp() {
  char indent[10] = "        ";
  printf("%s%s%s%s\n", indent, "-f", indent, 
          "The meta file to the execution procedure. Default is './meta.json'.");
  printf("%s%s%s%s\n", indent, "-u", indent, 
          "The TDengine user name to use when connecting to the server. Default is 'root'.");
#ifdef _TD_POWER_
  printf("%s%s%s%s\n", indent, "-P", indent, 
          "The password to use when connecting to the server. Default is 'powerdb'.");
  printf("%s%s%s%s\n", indent, "-c", indent, 
          "Configuration directory. Default is '/etc/power/'.");
#else
  printf("%s%s%s%s\n", indent, "-P", indent, 
          "The password to use when connecting to the server. Default is 'taosdata'.");
  printf("%s%s%s%s\n", indent, "-c", indent, 
          "Configuration directory. Default is '/etc/taos/'.");
#endif  
  printf("%s%s%s%s\n", indent, "-h", indent, 
          "The host to connect to TDengine. Default is localhost.");
  printf("%s%s%s%s\n", indent, "-p", indent, 
          "The TCP/IP port number to use for the connection. Default is 0.");
  printf("%s%s%s%s\n", indent, "-d", indent, 
          "Destination database. Default is 'test'.");
  printf("%s%s%s%s\n", indent, "-a", indent, 
          "Set the replica parameters of the database, Default 1, min: 1, max: 3.");
  printf("%s%s%s%s\n", indent, "-m", indent, 
          "Table prefix name. Default is 't'.");
  printf("%s%s%s%s\n", indent, "-s", indent, "The select sql file.");
  printf("%s%s%s%s\n", indent, "-M", indent, "Use metric flag.");
  printf("%s%s%s%s\n", indent, "-o", indent, 
          "Direct output to the named file. Default is './output.txt'.");
  printf("%s%s%s%s\n", indent, "-q", indent, 
          "Query mode--0: SYNC, 1: ASYNC. Default is SYNC.");
  printf("%s%s%s%s\n", indent, "-b", indent, 
          "The data_type of columns, default: TINYINT,SMALLINT,INT,BIGINT,FLOAT,DOUBLE,BINARY,NCHAR,BOOL,TIMESTAMP.");
  printf("%s%s%s%s\n", indent, "-w", indent, 
          "The length of data_type 'BINARY' or 'NCHAR'. Default is 16");
  printf("%s%s%s%s\n", indent, "-l", indent, 
          "The number of columns per record. Default is 10.");
  printf("%s%s%s%s\n", indent, "-T", indent, 
          "The number of threads. Default is 10.");
  printf("%s%s%s%s\n", indent, "-i", indent, 
          "The sleep time (ms) between insertion. Default is 0.");
  printf("%s%s%s%s\n", indent, "-r", indent, 
          "The number of records per request. Default is 100.");
  printf("%s%s%s%s\n", indent, "-t", indent, 
          "The number of tables. Default is 10000.");
  printf("%s%s%s%s\n", indent, "-n", indent, 
          "The number of records per table. Default is 10000.");
  printf("%s%s%s%s\n", indent, "-x", indent, "Not insert only flag.");
  printf("%s%s%s%s\n", indent, "-y", indent, "Default input yes for prompt.");
  printf("%s%s%s%s\n", indent, "-O", indent, 
          "Insert mode--0: In order, > 0: disorder ratio. Default is in order.");
  printf("%s%s%s%s\n", indent, "-R", indent, 
          "Out of order data's range, ms, default is 1000.");
  printf("%s%s%s%s\n", indent, "-g", indent, 
          "Print debug info.");
/*    printf("%s%s%s%s\n", indent, "-D", indent, 
          "if elete database if exists. 0: no, 1: yes, default is 1");
          */
}

void parse_args(int argc, char *argv[], SArguments *arguments) {
  char **sptr;
  wordexp_t full_path;

  for (int i = 1; i < argc; i++) {
    if (strcmp(argv[i], "-f") == 0) {
      arguments->metaFile = argv[++i];
    } else if (strcmp(argv[i], "-c") == 0) {
        char *configPath = argv[++i];
      if (wordexp(configPath, &full_path, 0) != 0) {
          fprintf(stderr, "Invalid path %s\n", configPath);
          return;
      }
      taos_options(TSDB_OPTION_CONFIGDIR, full_path.we_wordv[0]);
      wordfree(&full_path);
    } else if (strcmp(argv[i], "-h") == 0) {
      arguments->host = argv[++i];
    } else if (strcmp(argv[i], "-p") == 0) {
      arguments->port = atoi(argv[++i]);
    } else if (strcmp(argv[i], "-u") == 0) {
      arguments->user = argv[++i];
    } else if (strcmp(argv[i], "-P") == 0) {
      arguments->password = argv[++i];
    } else if (strcmp(argv[i], "-o") == 0) {
      arguments->output_file = argv[++i];
    } else if (strcmp(argv[i], "-s") == 0) {
      arguments->sqlFile = argv[++i];
    } else if (strcmp(argv[i], "-q") == 0) {
      arguments->mode = atoi(argv[++i]);
    } else if (strcmp(argv[i], "-T") == 0) {
      arguments->num_of_threads = atoi(argv[++i]);
    } else if (strcmp(argv[i], "-i") == 0) {
      arguments->insert_interval = atoi(argv[++i]);
    } else if (strcmp(argv[i], "-B") == 0) {
      arguments->rows_per_tbl = atoi(argv[++i]);
    } else if (strcmp(argv[i], "-r") == 0) {
      arguments->num_of_RPR = atoi(argv[++i]);
    } else if (strcmp(argv[i], "-t") == 0) {
      arguments->num_of_tables = atoi(argv[++i]);
    } else if (strcmp(argv[i], "-n") == 0) {
      arguments->num_of_DPT = atoi(argv[++i]);
    } else if (strcmp(argv[i], "-d") == 0) {
      arguments->database = argv[++i];
    } else if (strcmp(argv[i], "-l") == 0) {
      arguments->num_of_CPR = atoi(argv[++i]);
    } else if (strcmp(argv[i], "-b") == 0) {
      sptr = arguments->datatype;
      ++i;
      if (strstr(argv[i], ",") == NULL) {
        // only one col
        if (strcasecmp(argv[i], "INT")
                && strcasecmp(argv[i], "FLOAT")
                && strcasecmp(argv[i], "TINYINT")
                && strcasecmp(argv[i], "BOOL")
                && strcasecmp(argv[i], "SMALLINT")
                && strcasecmp(argv[i], "BIGINT")
                && strcasecmp(argv[i], "DOUBLE")
                && strcasecmp(argv[i], "BINARY") 
                && strcasecmp(argv[i], "NCHAR")) {
          fprintf(stderr, "Invalid data_type!\n");
          printHelp();
          exit(EXIT_FAILURE);
        }
        sptr[0] = argv[i];
      } else {
        // more than one col
        int index = 0;
        char *dupstr = strdup(argv[i]);
        char *running = dupstr;
        char *token = strsep(&running, ",");
        while (token != NULL) {
          if (strcasecmp(token, "INT")
                  && strcasecmp(token, "FLOAT")
                  && strcasecmp(token, "TINYINT")
                  && strcasecmp(token, "BOOL")
                  && strcasecmp(token, "SMALLINT")
                  && strcasecmp(token, "BIGINT")
                  && strcasecmp(token, "DOUBLE")
                  && strcasecmp(token, "BINARY")
                  && strcasecmp(token, "NCHAR")) {
            fprintf(stderr, "Invalid data_type!\n");
            printHelp();
            exit(EXIT_FAILURE);
          }
          sptr[index++] = token;
          token = strsep(&running, ",");
          if (index >= MAX_NUM_DATATYPE) break;
        }
        sptr[index] = NULL;
      }
    } else if (strcmp(argv[i], "-w") == 0) {
      arguments->len_of_binary = atoi(argv[++i]);
    } else if (strcmp(argv[i], "-m") == 0) {
      arguments->tb_prefix = argv[++i];
    } else if (strcmp(argv[i], "-M") == 0) {
      arguments->use_metric = true;
    } else if (strcmp(argv[i], "-x") == 0) {
      arguments->insert_only = true;
    } else if (strcmp(argv[i], "-y") == 0) {
      arguments->answer_yes = true;
    } else if (strcmp(argv[i], "-g") == 0) {
      arguments->debug_print = true;
    } else if (strcmp(argv[i], "-gg") == 0) {
      arguments->verbose_print = true;
    } else if (strcmp(argv[i], "-c") == 0) {
      strcpy(configDir, argv[++i]);
    } else if (strcmp(argv[i], "-O") == 0) {
      arguments->disorderRatio = atoi(argv[++i]);
      if (arguments->disorderRatio > 1 
              || arguments->disorderRatio < 0) {
        arguments->disorderRatio = 0;
      } else if (arguments->disorderRatio == 1) {
        arguments->disorderRange = 10;
      }
    } else if (strcmp(argv[i], "-R") == 0) {
      arguments->disorderRange = atoi(argv[++i]);
      if (arguments->disorderRange == 1 
              && (arguments->disorderRange > 50 
              || arguments->disorderRange <= 0)) {
        arguments->disorderRange = 10;
      }
    } else if (strcmp(argv[i], "-a") == 0) {
      arguments->replica = atoi(argv[++i]);
      if (arguments->replica > 3 || arguments->replica < 1) {
          arguments->replica = 1;
      }
    } else if (strcmp(argv[i], "-D") == 0) {
      arguments->method_of_delete = atoi(argv[++i]);
      if (arguments->method_of_delete < 0
              || arguments->method_of_delete > 3) {
        arguments->method_of_delete = 0;
      }
    } else if (strcmp(argv[i], "--help") == 0) {
      printHelp();
      exit(0);
    } else {
      fprintf(stderr, "wrong options\n");
      printHelp();
      exit(EXIT_FAILURE);
    }
  }

  if (((arguments->debug_print) && (arguments->metaFile == NULL))
          || arguments->verbose_print) {
    printf("###################################################################\n");
    printf("# meta file:                         %s\n", arguments->metaFile);
    printf("# Server IP:                         %s:%hu\n", 
            arguments->host == NULL ? "localhost" : arguments->host,
            arguments->port );
    printf("# User:                              %s\n", arguments->user);
    printf("# Password:                          %s\n", arguments->password);
    printf("# Use metric:                        %s\n", arguments->use_metric ? "true" : "false");
    if (*(arguments->datatype)) {
        printf("# Specified data type:               ");
        for (int i = 0; i < MAX_NUM_DATATYPE; i++)
            if (arguments->datatype[i])
               printf("%s,", arguments->datatype[i]);
            else
                break;
        printf("\n");
    }
    printf("# Insertion interval:                %d\n", arguments->insert_interval);
    printf("# Number of records per req:         %d\n", arguments->num_of_RPR);
    printf("# Max SQL length:                    %d\n", arguments->max_sql_len);
    printf("# Length of Binary:                  %d\n", arguments->len_of_binary);
    printf("# Number of Threads:                 %d\n", arguments->num_of_threads);
    printf("# Number of Tables:                  %d\n", arguments->num_of_tables);
    printf("# Number of Data per Table:          %d\n", arguments->num_of_DPT);
    printf("# Database name:                     %s\n", arguments->database);
    printf("# Table prefix:                      %s\n", arguments->tb_prefix);
    if (arguments->disorderRatio) {
      printf("# Data order:                        %d\n", arguments->disorderRatio);
      printf("# Data out of order rate:            %d\n", arguments->disorderRange);
  
    }
    printf("# Delete method:                     %d\n", arguments->method_of_delete);
    printf("# Answer yes when prompt:            %d\n", arguments->answer_yes);
    printf("# Print debug info:                  %d\n", arguments->debug_print);
    printf("# Print verbose info:                %d\n", arguments->verbose_print);
    printf("###################################################################\n");
    if (!arguments->answer_yes) {
        printf("Press enter key to continue\n\n");
        (void) getchar();
    }
  }
}

static bool getInfoFromJsonFile(char* file);
//static int generateOneRowDataForStb(SSuperTable* stbInfo);
//static int getDataIntoMemForStb(SSuperTable* stbInfo);
static void init_rand_data();
void tmfclose(FILE *fp) {
  if (NULL != fp) {
    fclose(fp);
  }
}

void tmfree(char *buf) {
  if (NULL != buf) {
    free(buf);
  }
}

static int queryDbExec(TAOS *taos, char *command, int type) {
  int i;
  TAOS_RES *res = NULL;
  int32_t   code = -1;

  for (i = 0; i < 5; i++) {
    if (NULL != res) {
      taos_free_result(res);
      res = NULL;
    }

    res = taos_query(taos, command);
    code = taos_errno(res);
    if (0 == code) {
      break;
    }    
  }

  if (code != 0) {
    debugPrint("%s() LN%d - command: %s\n", __func__, __LINE__, command);
    fprintf(stderr, "Failed to run %s, reason: %s\n", command, taos_errstr(res));
    taos_free_result(res);
    //taos_close(taos);
    return -1;
  }

  if (INSERT_TYPE == type) {
    int affectedRows = taos_affected_rows(res);
    taos_free_result(res);
    return affectedRows;
  }
  
  taos_free_result(res);
  return 0;
}

static void getResult(TAOS_RES *res, char* resultFileName) {  
  TAOS_ROW    row = NULL;
  int         num_rows = 0;
  int         num_fields = taos_field_count(res);
  TAOS_FIELD *fields     = taos_fetch_fields(res);

  FILE *fp = NULL;
  if (resultFileName[0] != 0) {
    fp = fopen(resultFileName, "at");
    if (fp == NULL) {
      fprintf(stderr, "failed to open result file: %s, result will not save to file\n", resultFileName);
    }
  }
  
  char* databuf = (char*) calloc(1, 100*1024*1024);
  if (databuf == NULL) {
    fprintf(stderr, "failed to malloc, warning: save result to file slowly!\n");
    if (fp)
        fclose(fp);
    return ;
  }

  int   totalLen = 0;
  char  temp[16000];

  // fetch the records row by row
  while ((row = taos_fetch_row(res))) {
    if (totalLen >= 100*1024*1024 - 32000) {
      if (fp) fprintf(fp, "%s", databuf);
      totalLen = 0;
      memset(databuf, 0, 100*1024*1024);
    }
    num_rows++;
    int len = taos_print_row(temp, row, fields, num_fields);
    len += sprintf(temp + len, "\n");
    //printf("query result:%s\n", temp);
    memcpy(databuf + totalLen, temp, len);
    totalLen += len;
  }

  if (fp) fprintf(fp, "%s", databuf);
  tmfclose(fp);
  free(databuf);
}

static void selectAndGetResult(TAOS *taos, char *command, char* resultFileName) {
  TAOS_RES *res = taos_query(taos, command);
  if (res == NULL || taos_errno(res) != 0) {
    printf("failed to sql:%s, reason:%s\n", command, taos_errstr(res));
    taos_free_result(res);
    return;
  }
  
  getResult(res, resultFileName);
  taos_free_result(res);
}

double getCurrentTime() {
  struct timeval tv;
  if (gettimeofday(&tv, NULL) != 0) {
    perror("Failed to get current time in ms");
    return 0.0;
  }

  return tv.tv_sec + tv.tv_usec / 1E6;
}

static int32_t rand_bool(){
  static int cursor;
  cursor++;
  cursor = cursor % MAX_PREPARED_RAND;
  return randint[cursor] % 2;
}

static int32_t rand_tinyint(){
  static int cursor;
  cursor++;
  cursor = cursor % MAX_PREPARED_RAND;
  return randint[cursor] % 128;
}

static int32_t rand_smallint(){
  static int cursor;
  cursor++;
  cursor = cursor % MAX_PREPARED_RAND;
  return randint[cursor] % 32767;
}

static int32_t rand_int(){
  static int cursor;
  cursor++;
  cursor = cursor % MAX_PREPARED_RAND;
  return randint[cursor];
}

static int64_t rand_bigint(){
  static int cursor;
  cursor++;
  cursor = cursor % MAX_PREPARED_RAND;
  return randbigint[cursor];
  
}

static float rand_float(){
  static int cursor;
  cursor++;
  cursor = cursor % MAX_PREPARED_RAND;
  return randfloat[cursor];    
}

static const char charset[] = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
void rand_string(char *str, int size) {
  str[0] = 0;
  if (size > 0) {
    //--size;
    int n;
    for (n = 0; n < size; n++) {
      int key = rand_tinyint() % (int)(sizeof(charset) - 1);
      str[n] = charset[key];
    }
    str[n] = 0;
  }
}

static double rand_double() {
  static int cursor;
  cursor++;
  cursor = cursor % MAX_PREPARED_RAND;
  return randdouble[cursor];

}

static void init_rand_data() {
  for (int i = 0; i < MAX_PREPARED_RAND; i++){
    randint[i] = (int)(taosRandom() % 65535);
    randbigint[i] = (int64_t)(taosRandom() % 2147483648);
    randfloat[i] = (float)(taosRandom() / 1000.0);
    randdouble[i] = (double)(taosRandom() / 1000000.0);
  }
}

#define SHOW_PARSE_RESULT_START()   \
    do { if (g_args.metaFile)  \
        printf("\033[1m\033[40;32m================ %s parse result START ================\033[0m\n", \
                g_args.metaFile); } while(0)

#define SHOW_PARSE_RESULT_END() \
    do { if (g_args.metaFile)   \
        printf("\033[1m\033[40;32m================ %s parse result END================\033[0m\n", \
                g_args.metaFile); } while(0)

#define SHOW_PARSE_RESULT_START_TO_FILE(fp)   \
    do { if (g_args.metaFile)  \
        fprintf(fp, "\033[1m\033[40;32m================ %s parse result START ================\033[0m\n", \
                g_args.metaFile); } while(0)

#define SHOW_PARSE_RESULT_END_TO_FILE(fp) \
    do { if (g_args.metaFile)   \
        fprintf(fp, "\033[1m\033[40;32m================ %s parse result END================\033[0m\n", \
                g_args.metaFile); } while(0)

static int printfInsertMeta() {
    SHOW_PARSE_RESULT_START();

  printf("host:                       \033[33m%s:%u\033[0m\n", g_Dbs.host, g_Dbs.port);
  printf("user:                       \033[33m%s\033[0m\n", g_Dbs.user);
  printf("password:                   \033[33m%s\033[0m\n", g_Dbs.password);
  printf("resultFile:                 \033[33m%s\033[0m\n", g_Dbs.resultFile);
  printf("thread num of insert data:  \033[33m%d\033[0m\n", g_Dbs.threadCount);
  printf("thread num of create table: \033[33m%d\033[0m\n", g_Dbs.threadCountByCreateTbl);
  printf("insert interval:            \033[33m%d\033[0m\n", g_args.insert_interval);
  printf("number of records per req:  \033[33m%d\033[0m\n", g_args.num_of_RPR);
  printf("max sql length:             \033[33m%d\033[0m\n", g_args.max_sql_len);

  printf("database count:             \033[33m%d\033[0m\n", g_Dbs.dbCount);
  for (int i = 0; i < g_Dbs.dbCount; i++) {
    printf("database[\033[33m%d\033[0m]:\n", i);
    printf("  database[%d] name:      \033[33m%s\033[0m\n", i, g_Dbs.db[i].dbName);
    if (0 == g_Dbs.db[i].drop) {
      printf("  drop:                  \033[33mno\033[0m\n");     
    }else {
      printf("  drop:                  \033[33myes\033[0m\n"); 
    }

    if (g_Dbs.db[i].dbCfg.blocks > 0) {
      printf("  blocks:                \033[33m%d\033[0m\n", g_Dbs.db[i].dbCfg.blocks);
    }
    if (g_Dbs.db[i].dbCfg.cache > 0) {
      printf("  cache:                 \033[33m%d\033[0m\n", g_Dbs.db[i].dbCfg.cache);
    }
    if (g_Dbs.db[i].dbCfg.days > 0) {
      printf("  days:                  \033[33m%d\033[0m\n", g_Dbs.db[i].dbCfg.days);
    }
    if (g_Dbs.db[i].dbCfg.keep > 0) {
      printf("  keep:                  \033[33m%d\033[0m\n", g_Dbs.db[i].dbCfg.keep);
    }
    if (g_Dbs.db[i].dbCfg.replica > 0) {
      printf("  replica:               \033[33m%d\033[0m\n", g_Dbs.db[i].dbCfg.replica);
    }
    if (g_Dbs.db[i].dbCfg.update > 0) {
      printf("  update:                \033[33m%d\033[0m\n", g_Dbs.db[i].dbCfg.update);
    }
    if (g_Dbs.db[i].dbCfg.minRows > 0) {
      printf("  minRows:               \033[33m%d\033[0m\n", g_Dbs.db[i].dbCfg.minRows);
    }
    if (g_Dbs.db[i].dbCfg.maxRows > 0) {
      printf("  maxRows:               \033[33m%d\033[0m\n", g_Dbs.db[i].dbCfg.maxRows);
    }
    if (g_Dbs.db[i].dbCfg.comp > 0) {
      printf("  comp:                  \033[33m%d\033[0m\n", g_Dbs.db[i].dbCfg.comp);
    }
    if (g_Dbs.db[i].dbCfg.walLevel > 0) {
      printf("  walLevel:              \033[33m%d\033[0m\n", g_Dbs.db[i].dbCfg.walLevel);
    }
    if (g_Dbs.db[i].dbCfg.fsync > 0) {
      printf("  fsync:                 \033[33m%d\033[0m\n", g_Dbs.db[i].dbCfg.fsync);
    }
    if (g_Dbs.db[i].dbCfg.quorum > 0) {
      printf("  quorum:                \033[33m%d\033[0m\n", g_Dbs.db[i].dbCfg.quorum);
    }
    if (g_Dbs.db[i].dbCfg.precision[0] != 0) {
      if ((0 == strncasecmp(g_Dbs.db[i].dbCfg.precision, "ms", 2))
              || (0 == strncasecmp(g_Dbs.db[i].dbCfg.precision, "us", 2))) {
        printf("  precision:             \033[33m%s\033[0m\n", g_Dbs.db[i].dbCfg.precision);
      } else {
        printf("\033[1m\033[40;31m  precision error:       %s\033[0m\n",
                g_Dbs.db[i].dbCfg.precision);
        return -1;
      }
    }

    printf("  super table count:     \033[33m%d\033[0m\n", g_Dbs.db[i].superTblCount);
    for (int j = 0; j < g_Dbs.db[i].superTblCount; j++) {
      printf("  super table[\033[33m%d\033[0m]:\n", j);
    
      printf("      stbName:           \033[33m%s\033[0m\n",  g_Dbs.db[i].superTbls[j].sTblName);   

      if (PRE_CREATE_SUBTBL == g_Dbs.db[i].superTbls[j].autoCreateTable) {
        printf("      autoCreateTable:   \033[33m%s\033[0m\n",  "no");
      } else if (AUTO_CREATE_SUBTBL == g_Dbs.db[i].superTbls[j].autoCreateTable) {
        printf("      autoCreateTable:   \033[33m%s\033[0m\n",  "yes");
      } else {
        printf("      autoCreateTable:   \033[33m%s\033[0m\n",  "error");
      }
      
      if (TBL_NO_EXISTS == g_Dbs.db[i].superTbls[j].childTblExists) {
        printf("      childTblExists:    \033[33m%s\033[0m\n",  "no");
      } else if (TBL_ALREADY_EXISTS == g_Dbs.db[i].superTbls[j].childTblExists) {
        printf("      childTblExists:    \033[33m%s\033[0m\n",  "yes");
      } else {
        printf("      childTblExists:    \033[33m%s\033[0m\n",  "error");
      }

      printf("      childTblCount:     \033[33m%d\033[0m\n",  g_Dbs.db[i].superTbls[j].childTblCount);
      printf("      childTblPrefix:    \033[33m%s\033[0m\n",  g_Dbs.db[i].superTbls[j].childTblPrefix);
      printf("      dataSource:        \033[33m%s\033[0m\n",  g_Dbs.db[i].superTbls[j].dataSource);
      printf("      insertMode:        \033[33m%s\033[0m\n",  g_Dbs.db[i].superTbls[j].insertMode);
      if (g_Dbs.db[i].superTbls[j].childTblLimit > 0) {
        printf("      childTblLimit:     \033[33m%d\033[0m\n",  g_Dbs.db[i].superTbls[j].childTblLimit);
      }
      if (g_Dbs.db[i].superTbls[j].childTblOffset >= 0) {
        printf("      childTblOffset:    \033[33m%d\033[0m\n",  g_Dbs.db[i].superTbls[j].childTblOffset);
      }
      printf("      insertRows:        \033[33m%"PRId64"\033[0m\n", g_Dbs.db[i].superTbls[j].insertRows);

      if (0 == g_Dbs.db[i].superTbls[j].multiThreadWriteOneTbl) {
        printf("      multiThreadWriteOneTbl:  \033[33mno\033[0m\n");
      }else {
        printf("      multiThreadWriteOneTbl:  \033[33myes\033[0m\n");
      }
      printf("      rowsPerTbl:        \033[33m%d\033[0m\n",
              g_Dbs.db[i].superTbls[j].rowsPerTbl);
      printf("      disorderRange:     \033[33m%d\033[0m\n",
              g_Dbs.db[i].superTbls[j].disorderRange);
      printf("      disorderRatio:     \033[33m%d\033[0m\n",
              g_Dbs.db[i].superTbls[j].disorderRatio);
      printf("      maxSqlLen:         \033[33m%d\033[0m\n",
              g_Dbs.db[i].superTbls[j].maxSqlLen);
      printf("      timeStampStep:     \033[33m%d\033[0m\n",
              g_Dbs.db[i].superTbls[j].timeStampStep);
      printf("      startTimestamp:    \033[33m%s\033[0m\n",
              g_Dbs.db[i].superTbls[j].startTimestamp);
      printf("      sampleFormat:      \033[33m%s\033[0m\n",
              g_Dbs.db[i].superTbls[j].sampleFormat);
      printf("      sampleFile:        \033[33m%s\033[0m\n",
              g_Dbs.db[i].superTbls[j].sampleFile);
      printf("      tagsFile:          \033[33m%s\033[0m\n",
              g_Dbs.db[i].superTbls[j].tagsFile);
      printf("      columnCount:       \033[33m%d\033[0m\n        ",
              g_Dbs.db[i].superTbls[j].columnCount);
      for (int k = 0; k < g_Dbs.db[i].superTbls[j].columnCount; k++) {
        //printf("dataType:%s, dataLen:%d\t", g_Dbs.db[i].superTbls[j].columns[k].dataType, g_Dbs.db[i].superTbls[j].columns[k].dataLen);
        if ((0 == strncasecmp(g_Dbs.db[i].superTbls[j].columns[k].dataType,
                       "binary", 6))
                || (0 == strncasecmp(g_Dbs.db[i].superTbls[j].columns[k].dataType,
                       "nchar", 5))) {
          printf("column[\033[33m%d\033[0m]:\033[33m%s(%d)\033[0m ", k,
                  g_Dbs.db[i].superTbls[j].columns[k].dataType,
                  g_Dbs.db[i].superTbls[j].columns[k].dataLen);
        } else {
          printf("column[%d]:\033[33m%s\033[0m ", k,
                  g_Dbs.db[i].superTbls[j].columns[k].dataType);
        }
      }
      printf("\n");

      printf("      tagCount:            \033[33m%d\033[0m\n        ",
              g_Dbs.db[i].superTbls[j].tagCount);
      for (int k = 0; k < g_Dbs.db[i].superTbls[j].tagCount; k++) {
        //printf("dataType:%s, dataLen:%d\t", g_Dbs.db[i].superTbls[j].tags[k].dataType, g_Dbs.db[i].superTbls[j].tags[k].dataLen);
        if ((0 == strncasecmp(g_Dbs.db[i].superTbls[j].tags[k].dataType, "binary", 6))
                || (0 == strncasecmp(g_Dbs.db[i].superTbls[j].tags[k].dataType, "nchar", 5))) {
          printf("tag[%d]:\033[33m%s(%d)\033[0m ", k,
                  g_Dbs.db[i].superTbls[j].tags[k].dataType,
                  g_Dbs.db[i].superTbls[j].tags[k].dataLen);
        } else {
          printf("tag[%d]:\033[33m%s\033[0m ", k,
                  g_Dbs.db[i].superTbls[j].tags[k].dataType);
        }
      }
      printf("\n");
    }
    printf("\n");
  }

  SHOW_PARSE_RESULT_END();

  return 0;
}

static void printfInsertMetaToFile(FILE* fp) {
    SHOW_PARSE_RESULT_START_TO_FILE(fp);

  fprintf(fp, "host:                       %s:%u\n", g_Dbs.host, g_Dbs.port);
  fprintf(fp, "user:                       %s\n", g_Dbs.user);
  fprintf(fp, "password:                   %s\n", g_Dbs.password);
  fprintf(fp, "resultFile:                 %s\n", g_Dbs.resultFile);
  fprintf(fp, "thread num of insert data:  %d\n", g_Dbs.threadCount);
  fprintf(fp, "thread num of create table: %d\n", g_Dbs.threadCountByCreateTbl);

  fprintf(fp, "database count:          %d\n", g_Dbs.dbCount);
  for (int i = 0; i < g_Dbs.dbCount; i++) {
    fprintf(fp, "database[%d]:\n", i);
    fprintf(fp, "  database[%d] name:       %s\n", i, g_Dbs.db[i].dbName);
    if (0 == g_Dbs.db[i].drop) {
      fprintf(fp, "  drop:                  no\n");     
    }else {
      fprintf(fp, "  drop:                  yes\n"); 
    }

    if (g_Dbs.db[i].dbCfg.blocks > 0) {
      fprintf(fp, "  blocks:                %d\n", g_Dbs.db[i].dbCfg.blocks);
    }
    if (g_Dbs.db[i].dbCfg.cache > 0) {
      fprintf(fp, "  cache:                 %d\n", g_Dbs.db[i].dbCfg.cache);
    }
    if (g_Dbs.db[i].dbCfg.days > 0) {
      fprintf(fp, "  days:                  %d\n", g_Dbs.db[i].dbCfg.days);
    }
    if (g_Dbs.db[i].dbCfg.keep > 0) {
      fprintf(fp, "  keep:                  %d\n", g_Dbs.db[i].dbCfg.keep);
    }
    if (g_Dbs.db[i].dbCfg.replica > 0) {
      fprintf(fp, "  replica:               %d\n", g_Dbs.db[i].dbCfg.replica);
    }
    if (g_Dbs.db[i].dbCfg.update > 0) {
      fprintf(fp, "  update:                %d\n", g_Dbs.db[i].dbCfg.update);
    }
    if (g_Dbs.db[i].dbCfg.minRows > 0) {
      fprintf(fp, "  minRows:               %d\n", g_Dbs.db[i].dbCfg.minRows);
    }
    if (g_Dbs.db[i].dbCfg.maxRows > 0) {
      fprintf(fp, "  maxRows:               %d\n", g_Dbs.db[i].dbCfg.maxRows);
    }
    if (g_Dbs.db[i].dbCfg.comp > 0) {
      fprintf(fp, "  comp:                  %d\n", g_Dbs.db[i].dbCfg.comp);
    }
    if (g_Dbs.db[i].dbCfg.walLevel > 0) {
      fprintf(fp, "  walLevel:              %d\n", g_Dbs.db[i].dbCfg.walLevel);
    }
    if (g_Dbs.db[i].dbCfg.fsync > 0) {
      fprintf(fp, "  fsync:                 %d\n", g_Dbs.db[i].dbCfg.fsync);
    }
    if (g_Dbs.db[i].dbCfg.quorum > 0) {
      fprintf(fp, "  quorum:                %d\n", g_Dbs.db[i].dbCfg.quorum);
    }
    if (g_Dbs.db[i].dbCfg.precision[0] != 0) {
      if ((0 == strncasecmp(g_Dbs.db[i].dbCfg.precision, "ms", 2))
              || (0 == strncasecmp(g_Dbs.db[i].dbCfg.precision, "us", 2))) {
        fprintf(fp, "  precision:             %s\n", g_Dbs.db[i].dbCfg.precision);
      } else {
        fprintf(fp, "  precision error:       %s\n", g_Dbs.db[i].dbCfg.precision);
      }
    }

    fprintf(fp, "  super table count:     %d\n", g_Dbs.db[i].superTblCount);
    for (int j = 0; j < g_Dbs.db[i].superTblCount; j++) {
      fprintf(fp, "  super table[%d]:\n", j);
    
      fprintf(fp, "      stbName:           %s\n",  g_Dbs.db[i].superTbls[j].sTblName);   

      if (PRE_CREATE_SUBTBL == g_Dbs.db[i].superTbls[j].autoCreateTable) {
        fprintf(fp, "      autoCreateTable:   %s\n",  "no");
      } else if (AUTO_CREATE_SUBTBL == g_Dbs.db[i].superTbls[j].autoCreateTable) {
        fprintf(fp, "      autoCreateTable:   %s\n",  "yes");
      } else {
        fprintf(fp, "      autoCreateTable:   %s\n",  "error");
      }
      
      if (TBL_NO_EXISTS == g_Dbs.db[i].superTbls[j].childTblExists) {
        fprintf(fp, "      childTblExists:    %s\n",  "no");
      } else if (TBL_ALREADY_EXISTS == g_Dbs.db[i].superTbls[j].childTblExists) {
        fprintf(fp, "      childTblExists:    %s\n",  "yes");
      } else {
        fprintf(fp, "      childTblExists:    %s\n",  "error");
      }
      
      fprintf(fp, "      childTblCount:     %d\n",  g_Dbs.db[i].superTbls[j].childTblCount);      
      fprintf(fp, "      childTblPrefix:    %s\n",  g_Dbs.db[i].superTbls[j].childTblPrefix);      
      fprintf(fp, "      dataSource:        %s\n",  g_Dbs.db[i].superTbls[j].dataSource);      
      fprintf(fp, "      insertMode:        %s\n",  g_Dbs.db[i].superTbls[j].insertMode);      
      fprintf(fp, "      insertRows:        %"PRId64"\n", g_Dbs.db[i].superTbls[j].insertRows); 
      fprintf(fp, "      insert interval:   %d\n", g_Dbs.db[i].superTbls[j].insertInterval);

      if (0 == g_Dbs.db[i].superTbls[j].multiThreadWriteOneTbl) {
        fprintf(fp, "      multiThreadWriteOneTbl:  no\n");     
      }else {
        fprintf(fp, "      multiThreadWriteOneTbl:  yes\n"); 
      }
      fprintf(fp, "      rowsPerTbl:        %d\n",  g_Dbs.db[i].superTbls[j].rowsPerTbl);     
      fprintf(fp, "      disorderRange:     %d\n",  g_Dbs.db[i].superTbls[j].disorderRange);     
      fprintf(fp, "      disorderRatio:     %d\n",  g_Dbs.db[i].superTbls[j].disorderRatio);
      fprintf(fp, "      maxSqlLen:         %d\n",  g_Dbs.db[i].superTbls[j].maxSqlLen);     
      
      fprintf(fp, "      timeStampStep:     %d\n",  g_Dbs.db[i].superTbls[j].timeStampStep);      
      fprintf(fp, "      startTimestamp:    %s\n",  g_Dbs.db[i].superTbls[j].startTimestamp);             
      fprintf(fp, "      sampleFormat:      %s\n",  g_Dbs.db[i].superTbls[j].sampleFormat);
      fprintf(fp, "      sampleFile:        %s\n",  g_Dbs.db[i].superTbls[j].sampleFile); 
      fprintf(fp, "      tagsFile:          %s\n",  g_Dbs.db[i].superTbls[j].tagsFile);   
    
      fprintf(fp, "      columnCount:       %d\n        ",  g_Dbs.db[i].superTbls[j].columnCount);
      for (int k = 0; k < g_Dbs.db[i].superTbls[j].columnCount; k++) {
        //printf("dataType:%s, dataLen:%d\t", g_Dbs.db[i].superTbls[j].columns[k].dataType, g_Dbs.db[i].superTbls[j].columns[k].dataLen);
        if ((0 == strncasecmp(
                        g_Dbs.db[i].superTbls[j].columns[k].dataType,
                        "binary", strlen("binary")))
                || (0 == strncasecmp(g_Dbs.db[i].superTbls[j].columns[k].dataType,
                        "nchar", strlen("nchar")))) {
          fprintf(fp, "column[%d]:%s(%d) ", k,
                  g_Dbs.db[i].superTbls[j].columns[k].dataType,
                  g_Dbs.db[i].superTbls[j].columns[k].dataLen);
        } else {
          fprintf(fp, "column[%d]:%s ", k, g_Dbs.db[i].superTbls[j].columns[k].dataType);
        }
      }
      fprintf(fp, "\n");

      fprintf(fp, "      tagCount:            %d\n        ",
              g_Dbs.db[i].superTbls[j].tagCount);
      for (int k = 0; k < g_Dbs.db[i].superTbls[j].tagCount; k++) {
        //printf("dataType:%s, dataLen:%d\t", g_Dbs.db[i].superTbls[j].tags[k].dataType, g_Dbs.db[i].superTbls[j].tags[k].dataLen);
        if ((0 == strncasecmp(g_Dbs.db[i].superTbls[j].tags[k].dataType,
                        "binary", strlen("binary")))
                || (0 == strncasecmp(g_Dbs.db[i].superTbls[j].tags[k].dataType,
                        "nchar", strlen("nchar")))) {
          fprintf(fp, "tag[%d]:%s(%d) ", k, g_Dbs.db[i].superTbls[j].tags[k].dataType,
                  g_Dbs.db[i].superTbls[j].tags[k].dataLen);
        } else {
          fprintf(fp, "tag[%d]:%s ", k, g_Dbs.db[i].superTbls[j].tags[k].dataType);
        }
      }
      fprintf(fp, "\n");
    }
    fprintf(fp, "\n");
  }
  SHOW_PARSE_RESULT_END_TO_FILE(fp);
}

static void printfQueryMeta() {
  SHOW_PARSE_RESULT_START();
  printf("host:                    \033[33m%s:%u\033[0m\n",
          g_queryInfo.host, g_queryInfo.port);
  printf("user:                    \033[33m%s\033[0m\n", g_queryInfo.user);
  printf("password:                \033[33m%s\033[0m\n", g_queryInfo.password);
  printf("database name:           \033[33m%s\033[0m\n", g_queryInfo.dbName);

  printf("\n");
  printf("specified table query info:                   \n");  
  printf("query interval: \033[33m%d\033[0m\n", g_queryInfo.superQueryInfo.rate);
  printf("concurrent:     \033[33m%d\033[0m\n", g_queryInfo.superQueryInfo.concurrent);
  printf("sqlCount:       \033[33m%d\033[0m\n", g_queryInfo.superQueryInfo.sqlCount); 

  if (SUBSCRIBE_TEST == g_args.test_mode) {
    printf("mod:            \033[33m%d\033[0m\n", g_queryInfo.superQueryInfo.subscribeMode);
    printf("interval:       \033[33m%d\033[0m\n", g_queryInfo.superQueryInfo.subscribeInterval);
    printf("restart:        \033[33m%d\033[0m\n", g_queryInfo.superQueryInfo.subscribeRestart);
    printf("keepProgress:   \033[33m%d\033[0m\n", g_queryInfo.superQueryInfo.subscribeKeepProgress);
  }

  for (int i = 0; i < g_queryInfo.superQueryInfo.sqlCount; i++) {
    printf("  sql[%d]: \033[33m%s\033[0m\n", i, g_queryInfo.superQueryInfo.sql[i]);
  }
  printf("\n");
  printf("super table query info:                   \n");  
  printf("query interval: \033[33m%d\033[0m\n", g_queryInfo.subQueryInfo.rate);
  printf("threadCnt:      \033[33m%d\033[0m\n", g_queryInfo.subQueryInfo.threadCnt);
  printf("childTblCount:  \033[33m%d\033[0m\n", g_queryInfo.subQueryInfo.childTblCount);
  printf("stable name:    \033[33m%s\033[0m\n", g_queryInfo.subQueryInfo.sTblName);

  if (SUBSCRIBE_TEST == g_args.test_mode) {
    printf("mod:            \033[33m%d\033[0m\n", g_queryInfo.subQueryInfo.subscribeMode);
    printf("interval:       \033[33m%d\033[0m\n", g_queryInfo.subQueryInfo.subscribeInterval);
    printf("restart:        \033[33m%d\033[0m\n", g_queryInfo.subQueryInfo.subscribeRestart);
    printf("keepProgress:   \033[33m%d\033[0m\n", g_queryInfo.subQueryInfo.subscribeKeepProgress);
  }
  
  printf("sqlCount:       \033[33m%d\033[0m\n", g_queryInfo.subQueryInfo.sqlCount);  
  for (int i = 0; i < g_queryInfo.subQueryInfo.sqlCount; i++) {
    printf("  sql[%d]: \033[33m%s\033[0m\n", i, g_queryInfo.subQueryInfo.sql[i]);
  }  
  printf("\n");

    SHOW_PARSE_RESULT_END();
}


static char* xFormatTimestamp(char* buf, int64_t val, int precision) {
  time_t tt;
  if (precision == TSDB_TIME_PRECISION_MICRO) {
    tt = (time_t)(val / 1000000);
  } else {
    tt = (time_t)(val / 1000);
  }

/* comment out as it make testcases like select_with_tags.sim fail.
  but in windows, this may cause the call to localtime crash if tt < 0,
  need to find a better solution.
  if (tt < 0) {
    tt = 0;
  }
  */

#ifdef WINDOWS
  if (tt < 0) tt = 0;
#endif

  struct tm* ptm = localtime(&tt);
  size_t pos = strftime(buf, 32, "%Y-%m-%d %H:%M:%S", ptm);

  if (precision == TSDB_TIME_PRECISION_MICRO) {
    sprintf(buf + pos, ".%06d", (int)(val % 1000000));
  } else {
    sprintf(buf + pos, ".%03d", (int)(val % 1000));
  }

  return buf;
}

static void xDumpFieldToFile(FILE* fp, const char* val, TAOS_FIELD* field, int32_t length, int precision) {
  if (val == NULL) {
    fprintf(fp, "%s", TSDB_DATA_NULL_STR);
    return;
  }

  char buf[TSDB_MAX_BYTES_PER_ROW];
  switch (field->type) {
    case TSDB_DATA_TYPE_BOOL:
      fprintf(fp, "%d", ((((int32_t)(*((char *)val))) == 1) ? 1 : 0));
      break;
    case TSDB_DATA_TYPE_TINYINT:
      fprintf(fp, "%d", *((int8_t *)val));
      break;
    case TSDB_DATA_TYPE_SMALLINT:
      fprintf(fp, "%d", *((int16_t *)val));
      break;
    case TSDB_DATA_TYPE_INT:
      fprintf(fp, "%d", *((int32_t *)val));
      break;
    case TSDB_DATA_TYPE_BIGINT:
      fprintf(fp, "%" PRId64, *((int64_t *)val));
      break;
    case TSDB_DATA_TYPE_FLOAT:
      fprintf(fp, "%.5f", GET_FLOAT_VAL(val));
      break;
    case TSDB_DATA_TYPE_DOUBLE:
      fprintf(fp, "%.9f", GET_DOUBLE_VAL(val));
      break;
    case TSDB_DATA_TYPE_BINARY:
    case TSDB_DATA_TYPE_NCHAR:
      memcpy(buf, val, length);
      buf[length] = 0;
      fprintf(fp, "\'%s\'", buf);
      break;
    case TSDB_DATA_TYPE_TIMESTAMP:
      xFormatTimestamp(buf, *(int64_t*)val, precision);
      fprintf(fp, "'%s'", buf);
      break;
    default:
      break;
  }
}

static int xDumpResultToFile(const char* fname, TAOS_RES* tres) {
  TAOS_ROW row = taos_fetch_row(tres);
  if (row == NULL) {
    return 0;
  }

  FILE* fp = fopen(fname, "at");
  if (fp == NULL) {
    fprintf(stderr, "ERROR: failed to open file: %s\n", fname);
    return -1;
  }

  int num_fields = taos_num_fields(tres);
  TAOS_FIELD *fields = taos_fetch_fields(tres);
  int precision = taos_result_precision(tres);

  for (int col = 0; col < num_fields; col++) {
    if (col > 0) {
      fprintf(fp, ",");
    }
    fprintf(fp, "%s", fields[col].name);
  }
  fputc('\n', fp);
  
  int numOfRows = 0;
  do {
    int32_t* length = taos_fetch_lengths(tres);
    for (int i = 0; i < num_fields; i++) {
      if (i > 0) {
        fputc(',', fp);
      }
      xDumpFieldToFile(fp, (const char*)row[i], fields +i, length[i], precision);
    }
    fputc('\n', fp);

    numOfRows++;
    row = taos_fetch_row(tres);
  } while( row != NULL);

  fclose(fp);

  return numOfRows;
}

static int getDbFromServer(TAOS * taos, SDbInfo** dbInfos) {  
  TAOS_RES * res;  
  TAOS_ROW row = NULL;
  int count = 0;
  
  res = taos_query(taos, "show databases;");  
  int32_t code = taos_errno(res);
  
  if (code != 0) {
    fprintf(stderr, "failed to run <show databases>, reason: %s\n", taos_errstr(res));
    return -1;
  }

  TAOS_FIELD *fields = taos_fetch_fields(res);

  while ((row = taos_fetch_row(res)) != NULL) {
    // sys database name : 'log'
    if (strncasecmp(row[TSDB_SHOW_DB_NAME_INDEX], "log", fields[TSDB_SHOW_DB_NAME_INDEX].bytes) == 0) continue;

    dbInfos[count] = (SDbInfo *)calloc(1, sizeof(SDbInfo));
    if (dbInfos[count] == NULL) {
      fprintf(stderr, "failed to allocate memory for some dbInfo[%d]\n", count);
      return -1;
    }

    tstrncpy(dbInfos[count]->name, (char *)row[TSDB_SHOW_DB_NAME_INDEX],
            fields[TSDB_SHOW_DB_NAME_INDEX].bytes);
    xFormatTimestamp(dbInfos[count]->create_time,
            *(int64_t*)row[TSDB_SHOW_DB_CREATED_TIME_INDEX],
            TSDB_TIME_PRECISION_MILLI);
    dbInfos[count]->ntables = *((int32_t *)row[TSDB_SHOW_DB_NTABLES_INDEX]);
    dbInfos[count]->vgroups = *((int32_t *)row[TSDB_SHOW_DB_VGROUPS_INDEX]);  
    dbInfos[count]->replica = *((int16_t *)row[TSDB_SHOW_DB_REPLICA_INDEX]);
    dbInfos[count]->quorum = *((int16_t *)row[TSDB_SHOW_DB_QUORUM_INDEX]);
    dbInfos[count]->days = *((int16_t *)row[TSDB_SHOW_DB_DAYS_INDEX]);  

    tstrncpy(dbInfos[count]->keeplist, (char *)row[TSDB_SHOW_DB_KEEP_INDEX],
            fields[TSDB_SHOW_DB_KEEP_INDEX].bytes);      
    dbInfos[count]->cache = *((int32_t *)row[TSDB_SHOW_DB_CACHE_INDEX]);
    dbInfos[count]->blocks = *((int32_t *)row[TSDB_SHOW_DB_BLOCKS_INDEX]);
    dbInfos[count]->minrows = *((int32_t *)row[TSDB_SHOW_DB_MINROWS_INDEX]);
    dbInfos[count]->maxrows = *((int32_t *)row[TSDB_SHOW_DB_MAXROWS_INDEX]);
    dbInfos[count]->wallevel = *((int8_t *)row[TSDB_SHOW_DB_WALLEVEL_INDEX]);
    dbInfos[count]->fsync = *((int32_t *)row[TSDB_SHOW_DB_FSYNC_INDEX]);
    dbInfos[count]->comp = (int8_t)(*((int8_t *)row[TSDB_SHOW_DB_COMP_INDEX]));
    dbInfos[count]->cachelast = (int8_t)(*((int8_t *)row[TSDB_SHOW_DB_CACHELAST_INDEX]));

    tstrncpy(dbInfos[count]->precision, 
            (char *)row[TSDB_SHOW_DB_PRECISION_INDEX],
            fields[TSDB_SHOW_DB_PRECISION_INDEX].bytes);  
    dbInfos[count]->update = *((int8_t *)row[TSDB_SHOW_DB_UPDATE_INDEX]);
    tstrncpy(dbInfos[count]->status, (char *)row[TSDB_SHOW_DB_STATUS_INDEX],
            fields[TSDB_SHOW_DB_STATUS_INDEX].bytes); 

    count++;
    if (count > MAX_DATABASE_COUNT) {
      fprintf(stderr, "The database count overflow than %d\n", MAX_DATABASE_COUNT);      
      break;
    }
  }

  return count;
}

static void printfDbInfoForQueryToFile(char* filename, SDbInfo* dbInfos, int index) {
  if (filename[0] == 0)
      return;

  FILE *fp = fopen(filename, "at");
  if (fp == NULL) {
    fprintf(stderr, "failed to open file: %s\n", filename);
    return;
  }

  fprintf(fp, "================ database[%d] ================\n", index);
  fprintf(fp, "name: %s\n", dbInfos->name);
  fprintf(fp, "created_time: %s\n", dbInfos->create_time);
  fprintf(fp, "ntables: %d\n", dbInfos->ntables);
  fprintf(fp, "vgroups: %d\n", dbInfos->vgroups);  
  fprintf(fp, "replica: %d\n", dbInfos->replica);
  fprintf(fp, "quorum: %d\n", dbInfos->quorum);
  fprintf(fp, "days: %d\n", dbInfos->days);    
  fprintf(fp, "keep0,keep1,keep(D): %s\n", dbInfos->keeplist);      
  fprintf(fp, "cache(MB): %d\n", dbInfos->cache);
  fprintf(fp, "blocks: %d\n", dbInfos->blocks);
  fprintf(fp, "minrows: %d\n", dbInfos->minrows);
  fprintf(fp, "maxrows: %d\n", dbInfos->maxrows);
  fprintf(fp, "wallevel: %d\n", dbInfos->wallevel);
  fprintf(fp, "fsync: %d\n", dbInfos->fsync);
  fprintf(fp, "comp: %d\n", dbInfos->comp);
  fprintf(fp, "cachelast: %d\n", dbInfos->cachelast);  
  fprintf(fp, "precision: %s\n", dbInfos->precision);  
  fprintf(fp, "update: %d\n", dbInfos->update);
  fprintf(fp, "status: %s\n", dbInfos->status); 
  fprintf(fp, "\n");

  fclose(fp);
}

static void printfQuerySystemInfo(TAOS * taos) {
  char filename[MAX_QUERY_SQL_LENGTH+1] = {0};
  char buffer[MAX_QUERY_SQL_LENGTH+1] = {0};
  TAOS_RES* res;

  time_t t;
  struct tm* lt;
  time(&t);
  lt = localtime(&t);
  snprintf(filename, MAX_QUERY_SQL_LENGTH, "querySystemInfo-%d-%d-%d %d:%d:%d",
          lt->tm_year+1900, lt->tm_mon, lt->tm_mday, lt->tm_hour, lt->tm_min,
          lt->tm_sec);

  // show variables
  res = taos_query(taos, "show variables;");
  //getResult(res, filename);
  xDumpResultToFile(filename, res);

  // show dnodes
  res = taos_query(taos, "show dnodes;");
  xDumpResultToFile(filename, res);
  //getResult(res, filename);

  // show databases
  res = taos_query(taos, "show databases;");
  SDbInfo** dbInfos = (SDbInfo **)calloc(MAX_DATABASE_COUNT, sizeof(SDbInfo *));
  if (dbInfos == NULL) {
    fprintf(stderr, "failed to allocate memory\n");
    return;
  }
  int dbCount = getDbFromServer(taos, dbInfos);
  if (dbCount <= 0) {
      free(dbInfos);
      return;
  }

  for (int i = 0; i < dbCount; i++) {
    // printf database info 
    printfDbInfoForQueryToFile(filename, dbInfos[i], i);

    // show db.vgroups
    snprintf(buffer, MAX_QUERY_SQL_LENGTH, "show %s.vgroups;", dbInfos[i]->name);
    res = taos_query(taos, buffer);
    xDumpResultToFile(filename, res);
  
    // show db.stables
    snprintf(buffer, MAX_QUERY_SQL_LENGTH, "show %s.stables;", dbInfos[i]->name);
    res = taos_query(taos, buffer);
    xDumpResultToFile(filename, res);

    free(dbInfos[i]);
  }

  free(dbInfos);
  
}

static void ERROR_EXIT(const char *msg) { perror(msg); exit(-1); }

static int postProceSql(char* host, uint16_t port, char* sqlstr)
{
    char *req_fmt = "POST %s HTTP/1.1\r\nHost: %s:%d\r\nAccept: */*\r\nAuthorization: Basic %s\r\nContent-Length: %d\r\nContent-Type: application/x-www-form-urlencoded\r\n\r\n%s";

    char *url = "/rest/sql";

    struct hostent *server;
    struct sockaddr_in serv_addr;
    int bytes, sent, received, req_str_len, resp_len;
    char *request_buf;
    char response_buf[RESP_BUF_LEN];
    uint16_t rest_port = port + TSDB_PORT_HTTP;

    int req_buf_len = strlen(sqlstr) + REQ_EXTRA_BUF_LEN;

    request_buf = malloc(req_buf_len);
    if (NULL == request_buf)
        ERROR_EXIT("ERROR, cannot allocate memory.");

    char userpass_buf[INPUT_BUF_LEN];
    int mod_table[] = {0, 2, 1};

    static char base64[] = {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
      'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
      'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
      'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
      'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
      'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
      'w', 'x', 'y', 'z', '0', '1', '2', '3',
      '4', '5', '6', '7', '8', '9', '+', '/'};

    snprintf(userpass_buf, INPUT_BUF_LEN, "%s:%s",
        g_Dbs.user, g_Dbs.password);
    size_t userpass_buf_len = strlen(userpass_buf);
    size_t encoded_len = 4 * ((userpass_buf_len +2) / 3);

    char base64_buf[INPUT_BUF_LEN];
#ifdef WINDOWS
    WSADATA wsaData;
    WSAStartup(MAKEWORD(2, 2), &wsaData);
    SOCKET sockfd;
#else
    int sockfd;
#endif
    sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (sockfd < 0) {
#ifdef WINDOWS
        fprintf(stderr, "Could not create socket : %d" , WSAGetLastError());
#endif
        debugPrint("%s() LN%d sockfd=%d\n", __func__, __LINE__, sockfd);
        free(request_buf);
        ERROR_EXIT("ERROR opening socket");
    }

    server = gethostbyname(host);
    if (server == NULL) {
        free(request_buf);
        ERROR_EXIT("ERROR, no such host");
    }

    debugPrint("h_name: %s\nh_addretype: %s\nh_length: %d\n",
            server->h_name,
            (server->h_addrtype == AF_INET)?"ipv4":"ipv6",
            server->h_length);

    memset(&serv_addr, 0, sizeof(serv_addr));
    serv_addr.sin_family = AF_INET;
    serv_addr.sin_port = htons(rest_port);
#ifdef WINDOWS
    serv_addr.sin_addr.s_addr = inet_addr(host);
#else
    memcpy(&serv_addr.sin_addr.s_addr,server->h_addr,server->h_length);
#endif

    int retConn = connect(sockfd,(struct sockaddr *)&serv_addr,sizeof(serv_addr));
    debugPrint("%s() LN%d connect() return %d\n", __func__, __LINE__, retConn);
    if (retConn < 0) {
        free(request_buf);
        ERROR_EXIT("ERROR connecting");
    }

    memset(base64_buf, 0, INPUT_BUF_LEN);

    for (int n = 0, m = 0; n < userpass_buf_len;) {
      uint32_t oct_a = n < userpass_buf_len ?
        (unsigned char) userpass_buf[n++]:0;
      uint32_t oct_b = n < userpass_buf_len ?
        (unsigned char) userpass_buf[n++]:0;
      uint32_t oct_c = n < userpass_buf_len ?
        (unsigned char) userpass_buf[n++]:0;
      uint32_t triple = (oct_a << 0x10) + (oct_b << 0x08) + oct_c;

      base64_buf[m++] = base64[(triple >> 3* 6) & 0x3f];
      base64_buf[m++] = base64[(triple >> 2* 6) & 0x3f];
      base64_buf[m++] = base64[(triple >> 1* 6) & 0x3f];
      base64_buf[m++] = base64[(triple >> 0* 6) & 0x3f];
    }

    for (int l = 0; l < mod_table[userpass_buf_len % 3]; l++)
      base64_buf[encoded_len - 1 - l] = '=';

    debugPrint("%s() LN%d: auth string base64 encoded: %s\n", __func__, __LINE__, base64_buf);
    char *auth = base64_buf;

    int r = snprintf(request_buf,
            req_buf_len,
            req_fmt, url, host, rest_port,
            auth, strlen(sqlstr), sqlstr);
    if (r >= req_buf_len) {
        free(request_buf);
        ERROR_EXIT("ERROR too long request");
    }
    verbosePrint("%s() LN%d: Request:\n%s\n", __func__, __LINE__, request_buf);

    req_str_len = strlen(request_buf);
    sent = 0;
    do {
#ifdef WINDOWS
        bytes = send(sockfd, request_buf + sent, req_str_len - sent, 0);
#else
        bytes = write(sockfd, request_buf + sent, req_str_len - sent);
#endif
        if (bytes < 0)
            ERROR_EXIT("ERROR writing message to socket");
        if (bytes == 0)
            break;
        sent+=bytes;
    } while (sent < req_str_len);

    memset(response_buf, 0, RESP_BUF_LEN);
    resp_len = sizeof(response_buf) - 1;
    received = 0;
    do {
#ifdef WINDOWS
        bytes = recv(sockfd, response_buf + received, resp_len - received, 0);
#else
        bytes = read(sockfd, response_buf + received, resp_len - received);
#endif
        if (bytes < 0) {
            free(request_buf);
            ERROR_EXIT("ERROR reading response from socket");
        }
        if (bytes == 0)
            break;
        received += bytes;
    } while (received < resp_len);

    if (received == resp_len) {
        free(request_buf);
        ERROR_EXIT("ERROR storing complete response from socket");
    }

    response_buf[RESP_BUF_LEN - 1] = '\0';
    printf("Response:\n%s\n", response_buf);

    free(request_buf);
#ifdef WINDOWS
    closesocket(sockfd);
    WSACleanup();
#else
    close(sockfd);
#endif

    return 0;
}

static char* getTagValueFromTagSample(SSuperTable* stbInfo, int tagUsePos) {
  char*  dataBuf = (char*)calloc(TSDB_MAX_SQL_LEN+1, 1);
  if (NULL == dataBuf) {
    printf("calloc failed! size:%d\n", TSDB_MAX_SQL_LEN+1);
    return NULL;
  }

  int    dataLen = 0;
  dataLen += snprintf(dataBuf + dataLen, TSDB_MAX_SQL_LEN - dataLen,
          "(%s)", stbInfo->tagDataBuf + stbInfo->lenOfTagOfOneRow * tagUsePos);

  return dataBuf;
}

static char* generateTagVaulesForStb(SSuperTable* stbInfo) {
  char*  dataBuf = (char*)calloc(TSDB_MAX_SQL_LEN+1, 1);
  if (NULL == dataBuf) {
    printf("calloc failed! size:%d\n", TSDB_MAX_SQL_LEN+1);
    return NULL;
  }

  int    dataLen = 0;
  dataLen += snprintf(dataBuf + dataLen, TSDB_MAX_SQL_LEN - dataLen, "(");
  for (int i = 0; i < stbInfo->tagCount; i++) {
    if ((0 == strncasecmp(stbInfo->tags[i].dataType, "binary", strlen("binary")))
            || (0 == strncasecmp(stbInfo->tags[i].dataType, "nchar", strlen("nchar")))) {
      if (stbInfo->tags[i].dataLen > TSDB_MAX_BINARY_LEN) {
        printf("binary or nchar length overflow, max size:%u\n",
                (uint32_t)TSDB_MAX_BINARY_LEN);
        tmfree(dataBuf);
        return NULL;
      }

      char* buf = (char*)calloc(stbInfo->tags[i].dataLen+1, 1);
      if (NULL == buf) {
        printf("calloc failed! size:%d\n", stbInfo->tags[i].dataLen);
        tmfree(dataBuf);
        return NULL;
      }
      rand_string(buf, stbInfo->tags[i].dataLen);
      dataLen += snprintf(dataBuf + dataLen, TSDB_MAX_SQL_LEN - dataLen,
              "\'%s\', ", buf);
      tmfree(buf);
    } else if (0 == strncasecmp(stbInfo->tags[i].dataType,
                "int", strlen("int"))) {
      dataLen += snprintf(dataBuf + dataLen, TSDB_MAX_SQL_LEN - dataLen,
              "%d, ", rand_int());
    } else if (0 == strncasecmp(stbInfo->tags[i].dataType,
                "bigint", strlen("bigint"))) {
      dataLen += snprintf(dataBuf + dataLen, TSDB_MAX_SQL_LEN - dataLen,
              "%"PRId64", ", rand_bigint());
    }  else if (0 == strncasecmp(stbInfo->tags[i].dataType,
                "float", strlen("float"))) {
      dataLen += snprintf(dataBuf + dataLen, TSDB_MAX_SQL_LEN - dataLen,
              "%f, ", rand_float());
    }  else if (0 == strncasecmp(stbInfo->tags[i].dataType,
                "double", strlen("double"))) {
      dataLen += snprintf(dataBuf + dataLen, TSDB_MAX_SQL_LEN - dataLen,
              "%f, ", rand_double());
    }  else if (0 == strncasecmp(stbInfo->tags[i].dataType,
                "smallint", strlen("smallint"))) {
      dataLen += snprintf(dataBuf + dataLen, TSDB_MAX_SQL_LEN - dataLen,
              "%d, ", rand_smallint());
    }  else if (0 == strncasecmp(stbInfo->tags[i].dataType,
                "tinyint", strlen("tinyint"))) {
      dataLen += snprintf(dataBuf + dataLen, TSDB_MAX_SQL_LEN - dataLen,
              "%d, ", rand_tinyint());
    }  else if (0 == strncasecmp(stbInfo->tags[i].dataType,
                "bool", strlen("bool"))) {
      dataLen += snprintf(dataBuf + dataLen, TSDB_MAX_SQL_LEN - dataLen,
              "%d, ", rand_bool());
    }  else if (0 == strncasecmp(stbInfo->tags[i].dataType,
                "timestamp", strlen("timestamp"))) {
      dataLen += snprintf(dataBuf + dataLen, TSDB_MAX_SQL_LEN - dataLen,
              "%"PRId64", ", rand_bigint());
    }  else {
      printf("No support data type: %s\n", stbInfo->tags[i].dataType);
      tmfree(dataBuf);
      return NULL;
    }
  }

  dataLen -= 2;
  dataLen += snprintf(dataBuf + dataLen, TSDB_MAX_SQL_LEN - dataLen, ")");  
  return dataBuf;
}

static int calcRowLen(SSuperTable*  superTbls) {  
  int colIndex;
  int  lenOfOneRow = 0;
  
  for (colIndex = 0; colIndex < superTbls->columnCount; colIndex++) {
    char* dataType = superTbls->columns[colIndex].dataType;
    
    if (strcasecmp(dataType, "BINARY") == 0) {
      lenOfOneRow += superTbls->columns[colIndex].dataLen + 3;
    } else if (strcasecmp(dataType, "NCHAR") == 0) {
      lenOfOneRow += superTbls->columns[colIndex].dataLen + 3;
    } else if (strcasecmp(dataType, "INT") == 0)  {
      lenOfOneRow += 11;
    } else if (strcasecmp(dataType, "BIGINT") == 0)  {
      lenOfOneRow += 21;
    } else if (strcasecmp(dataType, "SMALLINT") == 0)  {
      lenOfOneRow += 6;
    } else if (strcasecmp(dataType, "TINYINT") == 0)  {
      lenOfOneRow += 4;
    } else if (strcasecmp(dataType, "BOOL") == 0)  {
      lenOfOneRow += 6;
    } else if (strcasecmp(dataType, "FLOAT") == 0) {
      lenOfOneRow += 22;
    } else if (strcasecmp(dataType, "DOUBLE") == 0) { 
      lenOfOneRow += 42;
    }  else if (strcasecmp(dataType, "TIMESTAMP") == 0) { 
      lenOfOneRow += 21;
    } else {
      printf("get error data type : %s\n", dataType);
      exit(-1);
    }
  }

  superTbls->lenOfOneRow = lenOfOneRow + 20; // timestamp

  int tagIndex;
  int lenOfTagOfOneRow = 0;
  for (tagIndex = 0; tagIndex < superTbls->tagCount; tagIndex++) {
    char* dataType = superTbls->tags[tagIndex].dataType;

    if (strcasecmp(dataType, "BINARY") == 0) {
      lenOfTagOfOneRow += superTbls->tags[tagIndex].dataLen + 3;
    } else if (strcasecmp(dataType, "NCHAR") == 0) {
      lenOfTagOfOneRow += superTbls->tags[tagIndex].dataLen + 3;
    } else if (strcasecmp(dataType, "INT") == 0)  {
      lenOfTagOfOneRow += superTbls->tags[tagIndex].dataLen + 11;
    } else if (strcasecmp(dataType, "BIGINT") == 0)  {
      lenOfTagOfOneRow += superTbls->tags[tagIndex].dataLen + 21;
    } else if (strcasecmp(dataType, "SMALLINT") == 0)  {
      lenOfTagOfOneRow += superTbls->tags[tagIndex].dataLen + 6;
    } else if (strcasecmp(dataType, "TINYINT") == 0)  {
      lenOfTagOfOneRow += superTbls->tags[tagIndex].dataLen + 4;
    } else if (strcasecmp(dataType, "BOOL") == 0)  {
      lenOfTagOfOneRow += superTbls->tags[tagIndex].dataLen + 6;
    } else if (strcasecmp(dataType, "FLOAT") == 0) {
      lenOfTagOfOneRow += superTbls->tags[tagIndex].dataLen + 22;
    } else if (strcasecmp(dataType, "DOUBLE") == 0) { 
      lenOfTagOfOneRow += superTbls->tags[tagIndex].dataLen + 42;
    } else {
      printf("get error tag type : %s\n", dataType);
      exit(-1);
    }
  }

  superTbls->lenOfTagOfOneRow = lenOfTagOfOneRow;
    
  return 0;
}


static int getChildNameOfSuperTableWithLimitAndOffset(TAOS * taos,
        char* dbName, char* sTblName, char** childTblNameOfSuperTbl,
        int* childTblCountOfSuperTbl, int limit, int offset) {

  char command[BUFFER_SIZE] = "\0";
  char limitBuf[100] = "\0";

  TAOS_RES * res;  
  TAOS_ROW row = NULL;

  char* childTblName = *childTblNameOfSuperTbl;

  if (offset >= 0) {
    snprintf(limitBuf, 100, " limit %d offset %d", limit, offset);
  }

  //get all child table name use cmd: select tbname from superTblName;  
  snprintf(command, BUFFER_SIZE, "select tbname from %s.%s %s", dbName, sTblName, limitBuf);

  res = taos_query(taos, command);  
  int32_t code = taos_errno(res);
  if (code != 0) {
    printf("failed to run command %s\n", command);
    taos_free_result(res);
    taos_close(taos);
    exit(-1);
  }

  int childTblCount = (limit < 0)?10000:limit;
  int count = 0;
//  childTblName = (char*)calloc(1, childTblCount * TSDB_TABLE_NAME_LEN);
  char* pTblName = childTblName;
  while ((row = taos_fetch_row(res)) != NULL) {
    int32_t* len = taos_fetch_lengths(res);
    tstrncpy(pTblName, (char *)row[0], len[0]+1);
    //printf("==== sub table name: %s\n", pTblName);
    count++;
    if (count >= childTblCount - 1) {
      char *tmp = realloc(childTblName, (size_t)childTblCount*1.5*TSDB_TABLE_NAME_LEN+1);
      if (tmp != NULL) {
        childTblName = tmp;
        childTblCount = (int)(childTblCount*1.5);
        memset(childTblName + count*TSDB_TABLE_NAME_LEN, 0,
                (size_t)((childTblCount-count)*TSDB_TABLE_NAME_LEN));
      } else {
        // exit, if allocate more memory failed
        printf("realloc fail for save child table name of %s.%s\n", dbName, sTblName);
        tmfree(childTblName);
        taos_free_result(res);
        taos_close(taos);
        exit(-1);
      }
    }
    pTblName = childTblName + count * TSDB_TABLE_NAME_LEN;    
  }

  *childTblCountOfSuperTbl = count;
  *childTblNameOfSuperTbl  = childTblName;

  taos_free_result(res);
  return 0;
}

static int getAllChildNameOfSuperTable(TAOS * taos, char* dbName,
        char* sTblName, char** childTblNameOfSuperTbl,
        int* childTblCountOfSuperTbl) {

    return getChildNameOfSuperTableWithLimitAndOffset(taos, dbName, sTblName,
            childTblNameOfSuperTbl, childTblCountOfSuperTbl,
            -1, -1);
}

static int getSuperTableFromServer(TAOS * taos, char* dbName,
        SSuperTable*  superTbls) {
  char command[BUFFER_SIZE] = "\0";
  TAOS_RES * res;  
  TAOS_ROW row = NULL;
  int count = 0;

  //get schema use cmd: describe superTblName;
  snprintf(command, BUFFER_SIZE, "describe %s.%s", dbName, superTbls->sTblName);
  res = taos_query(taos, command);
  int32_t code = taos_errno(res);
  if (code != 0) {
    printf("failed to run command %s\n", command);
    taos_free_result(res);
    return -1;
  }

  int tagIndex = 0;
  int columnIndex = 0;
  TAOS_FIELD *fields = taos_fetch_fields(res);
  while ((row = taos_fetch_row(res)) != NULL) {
    if (0 == count) {
      count++;
      continue;
    }

    if (strcmp((char *)row[TSDB_DESCRIBE_METRIC_NOTE_INDEX], "TAG") == 0) {
      tstrncpy(superTbls->tags[tagIndex].field,
              (char *)row[TSDB_DESCRIBE_METRIC_FIELD_INDEX],
              fields[TSDB_DESCRIBE_METRIC_FIELD_INDEX].bytes);
      tstrncpy(superTbls->tags[tagIndex].dataType,
              (char *)row[TSDB_DESCRIBE_METRIC_TYPE_INDEX],
              fields[TSDB_DESCRIBE_METRIC_TYPE_INDEX].bytes);
      superTbls->tags[tagIndex].dataLen =
          *((int *)row[TSDB_DESCRIBE_METRIC_LENGTH_INDEX]);
      tstrncpy(superTbls->tags[tagIndex].note,
              (char *)row[TSDB_DESCRIBE_METRIC_NOTE_INDEX],
              fields[TSDB_DESCRIBE_METRIC_NOTE_INDEX].bytes);
      tagIndex++;
    } else {
      tstrncpy(superTbls->columns[columnIndex].field,
              (char *)row[TSDB_DESCRIBE_METRIC_FIELD_INDEX],
              fields[TSDB_DESCRIBE_METRIC_FIELD_INDEX].bytes);
      tstrncpy(superTbls->columns[columnIndex].dataType,
              (char *)row[TSDB_DESCRIBE_METRIC_TYPE_INDEX],
              fields[TSDB_DESCRIBE_METRIC_TYPE_INDEX].bytes);
      superTbls->columns[columnIndex].dataLen =
          *((int *)row[TSDB_DESCRIBE_METRIC_LENGTH_INDEX]);
      tstrncpy(superTbls->columns[columnIndex].note,
              (char *)row[TSDB_DESCRIBE_METRIC_NOTE_INDEX],
              fields[TSDB_DESCRIBE_METRIC_NOTE_INDEX].bytes);
      columnIndex++;
    }
    count++;
  }

  superTbls->columnCount = columnIndex;
  superTbls->tagCount    = tagIndex;
  taos_free_result(res);

  calcRowLen(superTbls);

  if (TBL_ALREADY_EXISTS == superTbls->childTblExists) {
    //get all child table name use cmd: select tbname from superTblName;  
    int childTblCount = 10000;
    superTbls->childTblName = (char*)calloc(1, childTblCount * TSDB_TABLE_NAME_LEN);
    if (superTbls->childTblName == NULL) {
      fprintf(stderr, "alloc memory failed!");
      return -1;
    }
    getAllChildNameOfSuperTable(taos, dbName,
            superTbls->sTblName,
            &superTbls->childTblName,
            &superTbls->childTblCount);
  }
  return 0;
}

static int createSuperTable(TAOS * taos, char* dbName, SSuperTable*  superTbls, bool use_metric) {
  char command[BUFFER_SIZE] = "\0";

  char cols[STRING_LEN] = "\0";
  int colIndex;
  int len = 0;

  int  lenOfOneRow = 0;
  for (colIndex = 0; colIndex < superTbls->columnCount; colIndex++) {
    char* dataType = superTbls->columns[colIndex].dataType;
 
    if (strcasecmp(dataType, "BINARY") == 0) {
      len += snprintf(cols + len, STRING_LEN - len,
          ", col%d %s(%d)", colIndex, "BINARY",
          superTbls->columns[colIndex].dataLen);
      lenOfOneRow += superTbls->columns[colIndex].dataLen + 3;
    } else if (strcasecmp(dataType, "NCHAR") == 0) {
      len += snprintf(cols + len, STRING_LEN - len,
          ", col%d %s(%d)", colIndex, "NCHAR",
          superTbls->columns[colIndex].dataLen);
      lenOfOneRow += superTbls->columns[colIndex].dataLen + 3;
    } else if (strcasecmp(dataType, "INT") == 0)  {
      len += snprintf(cols + len, STRING_LEN - len, ", col%d %s", colIndex, "INT");
      lenOfOneRow += 11;
    } else if (strcasecmp(dataType, "BIGINT") == 0)  {
      len += snprintf(cols + len, STRING_LEN - len, ", col%d %s", colIndex, "BIGINT");
      lenOfOneRow += 21;
    } else if (strcasecmp(dataType, "SMALLINT") == 0)  {
      len += snprintf(cols + len, STRING_LEN - len, ", col%d %s", colIndex, "SMALLINT");
      lenOfOneRow += 6;
    } else if (strcasecmp(dataType, "TINYINT") == 0)  {
      len += snprintf(cols + len, STRING_LEN - len, ", col%d %s", colIndex, "TINYINT");
      lenOfOneRow += 4;
    } else if (strcasecmp(dataType, "BOOL") == 0)  {
      len += snprintf(cols + len, STRING_LEN - len, ", col%d %s", colIndex, "BOOL");
      lenOfOneRow += 6;
    } else if (strcasecmp(dataType, "FLOAT") == 0) {
      len += snprintf(cols + len, STRING_LEN - len, ", col%d %s", colIndex, "FLOAT");
      lenOfOneRow += 22;
    } else if (strcasecmp(dataType, "DOUBLE") == 0) {
      len += snprintf(cols + len, STRING_LEN - len, ", col%d %s", colIndex, "DOUBLE");
      lenOfOneRow += 42;
    }  else if (strcasecmp(dataType, "TIMESTAMP") == 0) {
      len += snprintf(cols + len, STRING_LEN - len, ", col%d %s", colIndex, "TIMESTAMP");
      lenOfOneRow += 21;
    } else {
      taos_close(taos);
      printf("config error data type : %s\n", dataType);
      exit(-1);
    }
  }

  superTbls->lenOfOneRow = lenOfOneRow + 20; // timestamp
  //printf("%s.%s column count:%d, column length:%d\n\n", g_Dbs.db[i].dbName, g_Dbs.db[i].superTbls[j].sTblName, g_Dbs.db[i].superTbls[j].columnCount, lenOfOneRow);

  // save for creating child table
  superTbls->colsOfCreateChildTable = (char*)calloc(len+20, 1);
  if (NULL == superTbls->colsOfCreateChildTable) {
    printf("Failed when calloc, size:%d", len+1);
    taos_close(taos);
    exit(-1);
  }
  snprintf(superTbls->colsOfCreateChildTable, len+20, "(ts timestamp%s)", cols);
  verbosePrint("%s() LN%d: %s\n", __func__, __LINE__, superTbls->colsOfCreateChildTable);

  if (use_metric) {
    char tags[STRING_LEN] = "\0";
    int tagIndex;
    len = 0;

    int lenOfTagOfOneRow = 0;
    len += snprintf(tags + len, STRING_LEN - len, "(");
    for (tagIndex = 0; tagIndex < superTbls->tagCount; tagIndex++) {
      char* dataType = superTbls->tags[tagIndex].dataType;

      if (strcasecmp(dataType, "BINARY") == 0) {
        len += snprintf(tags + len, STRING_LEN - len, "t%d %s(%d), ", tagIndex,
                "BINARY", superTbls->tags[tagIndex].dataLen);
        lenOfTagOfOneRow += superTbls->tags[tagIndex].dataLen + 3;
      } else if (strcasecmp(dataType, "NCHAR") == 0) {
        len += snprintf(tags + len, STRING_LEN - len, "t%d %s(%d), ", tagIndex,
                "NCHAR", superTbls->tags[tagIndex].dataLen);
        lenOfTagOfOneRow += superTbls->tags[tagIndex].dataLen + 3;
      } else if (strcasecmp(dataType, "INT") == 0)  {
        len += snprintf(tags + len, STRING_LEN - len, "t%d %s, ", tagIndex,
                "INT");
        lenOfTagOfOneRow += superTbls->tags[tagIndex].dataLen + 11;
      } else if (strcasecmp(dataType, "BIGINT") == 0)  {
        len += snprintf(tags + len, STRING_LEN - len, "t%d %s, ", tagIndex,
                "BIGINT");
        lenOfTagOfOneRow += superTbls->tags[tagIndex].dataLen + 21;
      } else if (strcasecmp(dataType, "SMALLINT") == 0)  {
        len += snprintf(tags + len, STRING_LEN - len, "t%d %s, ", tagIndex,
                "SMALLINT");
        lenOfTagOfOneRow += superTbls->tags[tagIndex].dataLen + 6;
      } else if (strcasecmp(dataType, "TINYINT") == 0)  {
        len += snprintf(tags + len, STRING_LEN - len, "t%d %s, ", tagIndex,
                "TINYINT");
        lenOfTagOfOneRow += superTbls->tags[tagIndex].dataLen + 4;
      } else if (strcasecmp(dataType, "BOOL") == 0)  {
        len += snprintf(tags + len, STRING_LEN - len, "t%d %s, ", tagIndex,
                "BOOL");
        lenOfTagOfOneRow += superTbls->tags[tagIndex].dataLen + 6;
      } else if (strcasecmp(dataType, "FLOAT") == 0) {
        len += snprintf(tags + len, STRING_LEN - len, "t%d %s, ", tagIndex,
                "FLOAT");
        lenOfTagOfOneRow += superTbls->tags[tagIndex].dataLen + 22;
      } else if (strcasecmp(dataType, "DOUBLE") == 0) { 
        len += snprintf(tags + len, STRING_LEN - len, "t%d %s, ", tagIndex,
                "DOUBLE");
        lenOfTagOfOneRow += superTbls->tags[tagIndex].dataLen + 42;
      } else {
        taos_close(taos);
        printf("config error tag type : %s\n", dataType);
        exit(-1);
      }
    }
    len -= 2;
    len += snprintf(tags + len, STRING_LEN - len, ")");

    superTbls->lenOfTagOfOneRow = lenOfTagOfOneRow;

    snprintf(command, BUFFER_SIZE,
            "create table if not exists %s.%s (ts timestamp%s) tags %s",
            dbName, superTbls->sTblName, cols, tags);
    verbosePrint("%s() LN%d: %s\n", __func__, __LINE__, command);

    if (0 != queryDbExec(taos, command, NO_INSERT_TYPE)) {
        fprintf(stderr, "create supertable %s failed!\n\n",
                superTbls->sTblName);
        return -1;
    }
    debugPrint("create supertable %s success!\n\n", superTbls->sTblName);
  }
  return 0;
}

static int createDatabases() {
  TAOS * taos = NULL;
  int    ret = 0;
  taos = taos_connect(g_Dbs.host, g_Dbs.user, g_Dbs.password, NULL, g_Dbs.port);
  if (taos == NULL) {
    fprintf(stderr, "Failed to connect to TDengine, reason:%s\n", taos_errstr(NULL));
    return -1;
  }
  char command[BUFFER_SIZE] = "\0";

  for (int i = 0; i < g_Dbs.dbCount; i++) {   
    if (g_Dbs.db[i].drop) {
      sprintf(command, "drop database if exists %s;", g_Dbs.db[i].dbName);
      verbosePrint("%s() %d command: %s\n", __func__, __LINE__, command);
      if (0 != queryDbExec(taos, command, NO_INSERT_TYPE)) {
        taos_close(taos);
        return -1;
      }
    }

    int dataLen = 0;
    dataLen += snprintf(command + dataLen, 
        BUFFER_SIZE - dataLen, "create database if not exists %s", g_Dbs.db[i].dbName);

    if (g_Dbs.db[i].dbCfg.blocks > 0) {
      dataLen += snprintf(command + dataLen,
          BUFFER_SIZE - dataLen, " blocks %d", g_Dbs.db[i].dbCfg.blocks);
    }
    if (g_Dbs.db[i].dbCfg.cache > 0) {
      dataLen += snprintf(command + dataLen,
          BUFFER_SIZE - dataLen, " cache %d", g_Dbs.db[i].dbCfg.cache);
    }
    if (g_Dbs.db[i].dbCfg.days > 0) {
      dataLen += snprintf(command + dataLen,
          BUFFER_SIZE - dataLen, " days %d", g_Dbs.db[i].dbCfg.days);
    }
    if (g_Dbs.db[i].dbCfg.keep > 0) {
      dataLen += snprintf(command + dataLen,
          BUFFER_SIZE - dataLen, " keep %d", g_Dbs.db[i].dbCfg.keep);
    }
    if (g_Dbs.db[i].dbCfg.quorum > 1) {
      dataLen += snprintf(command + dataLen,
          BUFFER_SIZE - dataLen, " quorum %d", g_Dbs.db[i].dbCfg.quorum);
    }
    if (g_Dbs.db[i].dbCfg.replica > 0) {
      dataLen += snprintf(command + dataLen,
          BUFFER_SIZE - dataLen, " replica %d", g_Dbs.db[i].dbCfg.replica);
    }
    if (g_Dbs.db[i].dbCfg.update > 0) {
      dataLen += snprintf(command + dataLen,
          BUFFER_SIZE - dataLen, " update %d", g_Dbs.db[i].dbCfg.update);
    }
    //if (g_Dbs.db[i].dbCfg.maxtablesPerVnode > 0) {
    //  dataLen += snprintf(command + dataLen,
    //  BUFFER_SIZE - dataLen, "tables %d ", g_Dbs.db[i].dbCfg.maxtablesPerVnode);
    //}
    if (g_Dbs.db[i].dbCfg.minRows > 0) {
      dataLen += snprintf(command + dataLen,
          BUFFER_SIZE - dataLen, " minrows %d", g_Dbs.db[i].dbCfg.minRows);
    }
    if (g_Dbs.db[i].dbCfg.maxRows > 0) {
      dataLen += snprintf(command + dataLen,
          BUFFER_SIZE - dataLen, " maxrows %d", g_Dbs.db[i].dbCfg.maxRows);
    }
    if (g_Dbs.db[i].dbCfg.comp > 0) {
      dataLen += snprintf(command + dataLen,
          BUFFER_SIZE - dataLen, " comp %d", g_Dbs.db[i].dbCfg.comp);
    }
    if (g_Dbs.db[i].dbCfg.walLevel > 0) {
      dataLen += snprintf(command + dataLen,
          BUFFER_SIZE - dataLen, " wal %d", g_Dbs.db[i].dbCfg.walLevel);
    }
    if (g_Dbs.db[i].dbCfg.cacheLast > 0) {
      dataLen += snprintf(command + dataLen,
          BUFFER_SIZE - dataLen, " cachelast %d", g_Dbs.db[i].dbCfg.cacheLast);
    }
    if (g_Dbs.db[i].dbCfg.fsync > 0) {
      dataLen += snprintf(command + dataLen, BUFFER_SIZE - dataLen,
              " fsync %d", g_Dbs.db[i].dbCfg.fsync);
    }
    if ((0 == strncasecmp(g_Dbs.db[i].dbCfg.precision, "ms", strlen("ms")))
            || (0 == strncasecmp(g_Dbs.db[i].dbCfg.precision,
                    "us", strlen("us")))) {
      dataLen += snprintf(command + dataLen, BUFFER_SIZE - dataLen,
              " precision \'%s\';", g_Dbs.db[i].dbCfg.precision);
    }

    debugPrint("%s() %d command: %s\n", __func__, __LINE__, command);
    if (0 != queryDbExec(taos, command, NO_INSERT_TYPE)) {
      taos_close(taos);
      fprintf(stderr, "\ncreate database %s failed!\n\n", g_Dbs.db[i].dbName);
      return -1;
    }
    printf("\ncreate database %s success!\n\n", g_Dbs.db[i].dbName);

    debugPrint("%s() %d supertbl count:%d\n",
            __func__, __LINE__, g_Dbs.db[i].superTblCount);
    for (int j = 0; j < g_Dbs.db[i].superTblCount; j++) {
      // describe super table, if exists
      sprintf(command, "describe %s.%s;", g_Dbs.db[i].dbName,
              g_Dbs.db[i].superTbls[j].sTblName);
      verbosePrint("%s() %d command: %s\n", __func__, __LINE__, command);
      if (0 != queryDbExec(taos, command, NO_INSERT_TYPE)) {
        g_Dbs.db[i].superTbls[j].superTblExists = TBL_NO_EXISTS;
        ret = createSuperTable(taos, g_Dbs.db[i].dbName,
                &g_Dbs.db[i].superTbls[j], g_Dbs.use_metric);
      } else {      
        g_Dbs.db[i].superTbls[j].superTblExists = TBL_ALREADY_EXISTS;
        ret = getSuperTableFromServer(taos, g_Dbs.db[i].dbName,
                &g_Dbs.db[i].superTbls[j]);
      }

      if (0 != ret) {
        printf("\ncreate super table %d failed!\n\n", j);
        taos_close(taos);
        return -1;
      }
    }    
  }

  taos_close(taos);
  return 0;
}

static void* createTable(void *sarg) 
{  
  threadInfo *winfo = (threadInfo *)sarg; 
  SSuperTable* superTblInfo = winfo->superTblInfo;

  int64_t  lastPrintTime = taosGetTimestampMs();

  int buff_len;
  if (superTblInfo)
    buff_len = superTblInfo->maxSqlLen;
  else
    buff_len = BUFFER_SIZE;

  char *buffer = calloc(buff_len, 1);
  if (buffer == NULL) {
    fprintf(stderr, "Memory allocated failed!");
    exit(-1);
  }

  int len = 0;
  int batchNum = 0;

  verbosePrint("%s() LN%d: Creating table from %d to %d\n", 
          __func__, __LINE__,
          winfo->start_table_from, winfo->end_table_to);

  for (int i = winfo->start_table_from; i <= winfo->end_table_to; i++) {
    if (0 == g_Dbs.use_metric) {
      snprintf(buffer, buff_len, 
              "create table if not exists %s.%s%d %s;",
              winfo->db_name,
              g_args.tb_prefix, i,
              winfo->cols);
    } else {
      if (0 == len) {  
        batchNum = 0;
        memset(buffer, 0, buff_len);
        len += snprintf(buffer + len,
                buff_len - len, "create table ");
      }

      char* tagsValBuf = NULL;
      if (0 == superTblInfo->tagSource) {
        tagsValBuf = generateTagVaulesForStb(superTblInfo);
      } else {
        tagsValBuf = getTagValueFromTagSample(
                superTblInfo,
                i % superTblInfo->tagSampleCount);
      }
      if (NULL == tagsValBuf) {
        free(buffer);
        return NULL;
      }
      
      len += snprintf(buffer + len,
              superTblInfo->maxSqlLen - len,
              "if not exists %s.%s%d using %s.%s tags %s ",
              winfo->db_name, superTblInfo->childTblPrefix,
              i, winfo->db_name,
              superTblInfo->sTblName, tagsValBuf);
      free(tagsValBuf);
      batchNum++;

      if ((batchNum < superTblInfo->batchCreateTableNum)
              && ((superTblInfo->maxSqlLen - len) 
                  >= (superTblInfo->lenOfTagOfOneRow + 256))) {
        continue;
      }
    }

    len = 0;
    verbosePrint("%s() LN%d %s\n", __func__, __LINE__, buffer);
    if (0 != queryDbExec(winfo->taos, buffer, NO_INSERT_TYPE)){
      fprintf(stderr, "queryDbExec() failed. buffer:\n%s\n", buffer);
      free(buffer);
      return NULL;
    }

    int64_t  currentPrintTime = taosGetTimestampMs();
    if (currentPrintTime - lastPrintTime > 30*1000) {
      printf("thread[%d] already create %d - %d tables\n",
              winfo->threadID, winfo->start_table_from, i);
      lastPrintTime = currentPrintTime;
    }
  }
  
  if (0 != len) {
    verbosePrint("%s() %d buffer: %s\n", __func__, __LINE__, buffer);
    if (0 != queryDbExec(winfo->taos, buffer, NO_INSERT_TYPE)) {
      fprintf(stderr, "queryDbExec() failed. buffer:\n%s\n", buffer);
    }
  }

  free(buffer);
  return NULL;
}

static int startMultiThreadCreateChildTable(
        char* cols, int threads, int startFrom, int ntables,
        char* db_name, SSuperTable* superTblInfo) {
  pthread_t *pids = malloc(threads * sizeof(pthread_t));
  threadInfo *infos = malloc(threads * sizeof(threadInfo));

  if ((NULL == pids) || (NULL == infos)) {
    printf("malloc failed\n");
    exit(-1);
  }

  if (threads < 1) {
    threads = 1;
  }

  int a = ntables / threads;
  if (a < 1) {
    threads = ntables;
    a = 1;
  }

  int b = 0;
  b = ntables % threads;
 
  for (int i = 0; i < threads; i++) {
    threadInfo *t_info = infos + i;
    t_info->threadID = i;
    tstrncpy(t_info->db_name, db_name, MAX_DB_NAME_SIZE);
    t_info->superTblInfo = superTblInfo;
    verbosePrint("%s() %d db_name: %s\n", __func__, __LINE__, db_name);
    t_info->taos = taos_connect(
            g_Dbs.host,
            g_Dbs.user,
            g_Dbs.password,
            db_name,
            g_Dbs.port);
    if (t_info->taos == NULL) {
      fprintf(stderr, "Failed to connect to TDengine, reason:%s\n", taos_errstr(NULL));
      free(pids);
      free(infos);  
      return -1;
    }

    t_info->start_table_from = startFrom;
    t_info->ntables = i<b?a+1:a;
    t_info->end_table_to = i < b ? startFrom + a : startFrom + a - 1;
    startFrom = t_info->end_table_to + 1;
    t_info->use_metric = 1;
    t_info->cols = cols;
    t_info->minDelay = INT16_MAX;
    pthread_create(pids + i, NULL, createTable, t_info);
  }
  
  for (int i = 0; i < threads; i++) {
    pthread_join(pids[i], NULL);
  }

  for (int i = 0; i < threads; i++) {
    threadInfo *t_info = infos + i;
    taos_close(t_info->taos);
  }

  free(pids);
  free(infos);  

  return 0;
}


static void createChildTables() {
    char tblColsBuf[MAX_SQL_SIZE];
    int len;

  for (int i = 0; i < g_Dbs.dbCount; i++) {
    if (g_Dbs.db[i].superTblCount > 0) {
        // with super table
      for (int j = 0; j < g_Dbs.db[i].superTblCount; j++) {
        if ((AUTO_CREATE_SUBTBL == g_Dbs.db[i].superTbls[j].autoCreateTable)
              || (TBL_ALREADY_EXISTS == g_Dbs.db[i].superTbls[j].childTblExists)) {
          continue;
        }

        verbosePrint("%s() LN%d: %s\n", __func__, __LINE__,
                g_Dbs.db[i].superTbls[j].colsOfCreateChildTable);
        int startFrom = 0;
        g_totalChildTables += g_Dbs.db[i].superTbls[j].childTblCount;

        verbosePrint("%s() LN%d: create %d child tables from %d\n", __func__, __LINE__,
              g_totalChildTables, startFrom);  
        startMultiThreadCreateChildTable(
              g_Dbs.db[i].superTbls[j].colsOfCreateChildTable,
              g_Dbs.threadCountByCreateTbl,
              startFrom,
              g_totalChildTables,
              g_Dbs.db[i].dbName, &(g_Dbs.db[i].superTbls[j]));
      }
    } else {
        // normal table
        len = snprintf(tblColsBuf, MAX_SQL_SIZE, "(TS TIMESTAMP");
        int j = 0;
        while (g_args.datatype[j]) {
            if ((strncasecmp(g_args.datatype[j], "BINARY", strlen("BINARY")) == 0)
                    || (strncasecmp(g_args.datatype[j],
                        "NCHAR", strlen("NCHAR")) == 0)) {
                len = snprintf(tblColsBuf + len, MAX_SQL_SIZE,
                        ", COL%d %s(60)", j, g_args.datatype[j]);
            } else {
                len = snprintf(tblColsBuf + len, MAX_SQL_SIZE,
                        ", COL%d %s", j, g_args.datatype[j]);
            }
            len = strlen(tblColsBuf);
            j++;
        }

        len = snprintf(tblColsBuf + len, MAX_SQL_SIZE - len, ")");

        verbosePrint("%s() LN%d: dbName: %s num of tb: %d schema: %s\n",
                __func__, __LINE__,
                g_Dbs.db[i].dbName, g_args.num_of_tables, tblColsBuf);
        startMultiThreadCreateChildTable(
              tblColsBuf,
              g_Dbs.threadCountByCreateTbl,
              0,
              g_args.num_of_tables,
              g_Dbs.db[i].dbName,
              NULL);
    }
  }
}

/*
  Read 10000 lines at most. If more than 10000 lines, continue to read after using
*/
static int readTagFromCsvFileToMem(SSuperTable  * superTblInfo) {
  size_t  n = 0;
  ssize_t readLen = 0;
  char *  line = NULL;

  FILE *fp = fopen(superTblInfo->tagsFile, "r");
  if (fp == NULL) {
    printf("Failed to open tags file: %s, reason:%s\n",
            superTblInfo->tagsFile, strerror(errno));
    return -1;
  }

  if (superTblInfo->tagDataBuf) {
    free(superTblInfo->tagDataBuf);
    superTblInfo->tagDataBuf = NULL;
  }

  int tagCount = 10000;
  int count = 0;
  char* tagDataBuf = calloc(1, superTblInfo->lenOfTagOfOneRow * tagCount);
  if (tagDataBuf == NULL) {
    printf("Failed to calloc, reason:%s\n", strerror(errno));
    fclose(fp);
    return -1;
  }

  while ((readLen = tgetline(&line, &n, fp)) != -1) {
    if (('\r' == line[readLen - 1]) || ('\n' == line[readLen - 1])) {
      line[--readLen] = 0;
    }

    if (readLen == 0) {
      continue;
    }

    memcpy(tagDataBuf + count * superTblInfo->lenOfTagOfOneRow, line, readLen);
    count++;

    if (count >= tagCount - 1) {
      char *tmp = realloc(tagDataBuf,
              (size_t)tagCount*1.5*superTblInfo->lenOfTagOfOneRow);
      if (tmp != NULL) {
        tagDataBuf = tmp;
        tagCount = (int)(tagCount*1.5);
        memset(tagDataBuf + count*superTblInfo->lenOfTagOfOneRow,
                0, (size_t)((tagCount-count)*superTblInfo->lenOfTagOfOneRow));
      } else {
        // exit, if allocate more memory failed
        printf("realloc fail for save tag val from %s\n", superTblInfo->tagsFile);
        tmfree(tagDataBuf);
        free(line);
        fclose(fp);
        return -1;
      }
    }
  }

  superTblInfo->tagDataBuf = tagDataBuf;
  superTblInfo->tagSampleCount = count;

  free(line);
  fclose(fp);
  return 0;
}

int readSampleFromJsonFileToMem(SSuperTable  * superTblInfo) {
  // TODO
  return 0;
}

/*
  Read 10000 lines at most. If more than 10000 lines, continue to read after using
*/
static int readSampleFromCsvFileToMem(
        SSuperTable* superTblInfo) {
  size_t  n = 0;
  ssize_t readLen = 0;
  char *  line = NULL;
  int getRows = 0;
 
  FILE*  fp = fopen(superTblInfo->sampleFile, "r");
  if (fp == NULL) {
      fprintf(stderr, "Failed to open sample file: %s, reason:%s\n",
              superTblInfo->sampleFile, strerror(errno));
      return -1;
  }

  assert(superTblInfo->sampleDataBuf);
  memset(superTblInfo->sampleDataBuf, 0,
          MAX_SAMPLES_ONCE_FROM_FILE * superTblInfo->lenOfOneRow);
  while (1) {
    readLen = tgetline(&line, &n, fp);
    if (-1 == readLen) {
      if(0 != fseek(fp, 0, SEEK_SET)) {
        fprintf(stderr, "Failed to fseek file: %s, reason:%s\n",
                superTblInfo->sampleFile, strerror(errno));
        fclose(fp);
        return -1;
      }
      continue;
    }
  
    if (('\r' == line[readLen - 1]) || ('\n' == line[readLen - 1])) {
      line[--readLen] = 0;
    }

    if (readLen == 0) {
      continue;
    }

    if (readLen > superTblInfo->lenOfOneRow) {
      printf("sample row len[%d] overflow define schema len[%d], so discard this row\n",
              (int32_t)readLen, superTblInfo->lenOfOneRow);
      continue;
    }

    verbosePrint("readLen=%ld stb->lenOfOneRow=%d getRows=%d\n", readLen,
            superTblInfo->lenOfOneRow, getRows);

    memcpy(superTblInfo->sampleDataBuf + getRows * superTblInfo->lenOfOneRow,
          line, readLen);
    getRows++;

    if (getRows == MAX_SAMPLES_ONCE_FROM_FILE) {
      break;
    }
  }

  fclose(fp);
  tmfree(line);
  return 0;
}

/*
void readSampleFromFileToMem(SSuperTable  * supterTblInfo) {
  int ret;
  if (0 == strncasecmp(supterTblInfo->sampleFormat, "csv", 3)) {
    ret = readSampleFromCsvFileToMem(supterTblInfo);
  } else if (0 == strncasecmp(supterTblInfo->sampleFormat, "json", 4)) {
    ret = readSampleFromJsonFileToMem(supterTblInfo);
  }

  if (0 != ret) {
    exit(-1);
  }
}
*/
static bool getColumnAndTagTypeFromInsertJsonFile(cJSON* stbInfo, SSuperTable* superTbls) {  
  bool  ret = false;
  
  // columns 
  cJSON *columns = cJSON_GetObjectItem(stbInfo, "columns");
  if (columns && columns->type != cJSON_Array) {
    printf("ERROR: failed to read json, columns not found\n");
    goto PARSE_OVER;
  } else if (NULL == columns) {
    superTbls->columnCount = 0;
    superTbls->tagCount    = 0;
    return true;
  }
  
  int columnSize = cJSON_GetArraySize(columns);
  if (columnSize > MAX_COLUMN_COUNT) {
    printf("ERROR: failed to read json, column size overflow, max column size is %d\n",
            MAX_COLUMN_COUNT);
    goto PARSE_OVER;
  }

  int count = 1;
  int index = 0;
  StrColumn    columnCase;

  //superTbls->columnCount = columnSize;  
  for (int k = 0; k < columnSize; ++k) {
    cJSON* column = cJSON_GetArrayItem(columns, k);
    if (column == NULL) continue;

    count = 1;
    cJSON* countObj = cJSON_GetObjectItem(column, "count");
    if (countObj && countObj->type == cJSON_Number) {
      count = countObj->valueint;    
    } else if (countObj && countObj->type != cJSON_Number) {
      printf("ERROR: failed to read json, column count not found\n");
      goto PARSE_OVER;
    } else {
      count = 1;
    }

    // column info 
    memset(&columnCase, 0, sizeof(StrColumn));
    cJSON *dataType = cJSON_GetObjectItem(column, "type");
    if (!dataType || dataType->type != cJSON_String || dataType->valuestring == NULL) {
      printf("ERROR: failed to read json, column type not found\n");
      goto PARSE_OVER;
    }
    //tstrncpy(superTbls->columns[k].dataType, dataType->valuestring, MAX_TB_NAME_SIZE);
    tstrncpy(columnCase.dataType, dataType->valuestring, MAX_TB_NAME_SIZE);
            
    cJSON* dataLen = cJSON_GetObjectItem(column, "len");
    if (dataLen && dataLen->type == cJSON_Number) {
      columnCase.dataLen = dataLen->valueint;    
    } else if (dataLen && dataLen->type != cJSON_Number) {
      printf("ERROR: failed to read json, column len not found\n");
      goto PARSE_OVER;
    } else {
      columnCase.dataLen = 8;
    }
    
    for (int n = 0; n < count; ++n) {
      tstrncpy(superTbls->columns[index].dataType, columnCase.dataType, MAX_TB_NAME_SIZE);
      superTbls->columns[index].dataLen = columnCase.dataLen; 
      index++;
    }
  }  
  superTbls->columnCount = index;  
  
  count = 1;
  index = 0;
  // tags 
  cJSON *tags = cJSON_GetObjectItem(stbInfo, "tags");
  if (!tags || tags->type != cJSON_Array) {
    printf("ERROR: failed to read json, tags not found\n");
    goto PARSE_OVER;
  }
  
  int tagSize = cJSON_GetArraySize(tags);
  if (tagSize > MAX_TAG_COUNT) {
    printf("ERROR: failed to read json, tags size overflow, max tag size is %d\n", MAX_TAG_COUNT);
    goto PARSE_OVER;
  }
  
  //superTbls->tagCount = tagSize;  
  for (int k = 0; k < tagSize; ++k) {
    cJSON* tag = cJSON_GetArrayItem(tags, k);
    if (tag == NULL) continue;
    
    count = 1;
    cJSON* countObj = cJSON_GetObjectItem(tag, "count");
    if (countObj && countObj->type == cJSON_Number) {
      count = countObj->valueint;    
    } else if (countObj && countObj->type != cJSON_Number) {
      printf("ERROR: failed to read json, column count not found\n");
      goto PARSE_OVER;
    } else {
      count = 1;
    }

    // column info 
    memset(&columnCase, 0, sizeof(StrColumn));
    cJSON *dataType = cJSON_GetObjectItem(tag, "type");
    if (!dataType || dataType->type != cJSON_String || dataType->valuestring == NULL) {
      printf("ERROR: failed to read json, tag type not found\n");
      goto PARSE_OVER;
    }
    tstrncpy(columnCase.dataType, dataType->valuestring, MAX_TB_NAME_SIZE);
            
    cJSON* dataLen = cJSON_GetObjectItem(tag, "len");
    if (dataLen && dataLen->type == cJSON_Number) {
      columnCase.dataLen = dataLen->valueint;    
    } else if (dataLen && dataLen->type != cJSON_Number) {
      printf("ERROR: failed to read json, column len not found\n");
      goto PARSE_OVER;
    } else {
      columnCase.dataLen = 0;
    }  
    
    for (int n = 0; n < count; ++n) {
      tstrncpy(superTbls->tags[index].dataType, columnCase.dataType, MAX_TB_NAME_SIZE);
      superTbls->tags[index].dataLen = columnCase.dataLen; 
      index++;
    }
  }      
  superTbls->tagCount = index;

  ret = true;

PARSE_OVER:
  //free(content);
  //cJSON_Delete(root);
  //fclose(fp);
  return ret;
}

static bool getMetaFromInsertJsonFile(cJSON* root) {
  bool  ret = false;

  cJSON* cfgdir = cJSON_GetObjectItem(root, "cfgdir");
  if (cfgdir && cfgdir->type == cJSON_String && cfgdir->valuestring != NULL) {
    tstrncpy(g_Dbs.cfgDir, cfgdir->valuestring, MAX_FILE_NAME_LEN);
  }

  cJSON* host = cJSON_GetObjectItem(root, "host");
  if (host && host->type == cJSON_String && host->valuestring != NULL) {
    tstrncpy(g_Dbs.host, host->valuestring, MAX_DB_NAME_SIZE);
  } else if (!host) {
    tstrncpy(g_Dbs.host, "127.0.0.1", MAX_DB_NAME_SIZE);
  } else {
    printf("ERROR: failed to read json, host not found\n");
    goto PARSE_OVER;
  }

  cJSON* port = cJSON_GetObjectItem(root, "port");
  if (port && port->type == cJSON_Number) {
    g_Dbs.port = port->valueint;
  } else if (!port) {
    g_Dbs.port = 6030;
  }

  cJSON* user = cJSON_GetObjectItem(root, "user");
  if (user && user->type == cJSON_String && user->valuestring != NULL) {
    tstrncpy(g_Dbs.user, user->valuestring, MAX_DB_NAME_SIZE);   
  } else if (!user) {
    tstrncpy(g_Dbs.user, "root", MAX_DB_NAME_SIZE);
  }

  cJSON* password = cJSON_GetObjectItem(root, "password");
  if (password && password->type == cJSON_String && password->valuestring != NULL) {
    tstrncpy(g_Dbs.password, password->valuestring, MAX_DB_NAME_SIZE);
  } else if (!password) {
    tstrncpy(g_Dbs.password, "taosdata", MAX_DB_NAME_SIZE);
  }

  cJSON* resultfile = cJSON_GetObjectItem(root, "result_file");
  if (resultfile && resultfile->type == cJSON_String && resultfile->valuestring != NULL) {
    tstrncpy(g_Dbs.resultFile, resultfile->valuestring, MAX_FILE_NAME_LEN);
  } else if (!resultfile) {
    tstrncpy(g_Dbs.resultFile, "./insert_res.txt", MAX_FILE_NAME_LEN);
  }

  cJSON* threads = cJSON_GetObjectItem(root, "thread_count");
  if (threads && threads->type == cJSON_Number) {
    g_Dbs.threadCount = threads->valueint;
  } else if (!threads) {
    g_Dbs.threadCount = 1;
  } else {
    printf("ERROR: failed to read json, threads not found\n");
    goto PARSE_OVER;
  }  
 
  cJSON* threads2 = cJSON_GetObjectItem(root, "thread_count_create_tbl");
  if (threads2 && threads2->type == cJSON_Number) {
    g_Dbs.threadCountByCreateTbl = threads2->valueint;
  } else if (!threads2) {
    g_Dbs.threadCountByCreateTbl = 1;
  } else {
    printf("ERROR: failed to read json, threads2 not found\n");
    goto PARSE_OVER;
  } 

      cJSON* gInsertInterval = cJSON_GetObjectItem(root, "insert_interval");
      if (gInsertInterval && gInsertInterval->type == cJSON_Number) {
        g_args.insert_interval = gInsertInterval->valueint;
      } else if (!gInsertInterval) {
        g_args.insert_interval = 0;
      } else {
        fprintf(stderr, "ERROR: failed to read json, insert_interval input mistake\n");
        goto PARSE_OVER;
      }
 
      cJSON* rowsPerTbl = cJSON_GetObjectItem(root, "rows_per_tbl");
      if (rowsPerTbl && rowsPerTbl->type == cJSON_Number) {
        g_args.rows_per_tbl = rowsPerTbl->valueint;
      } else if (!rowsPerTbl) {
        g_args.rows_per_tbl = 0; // 0 means progressive mode, > 0 mean interlace mode. max value is less or equ num_of_records_per_req
      } else {
        fprintf(stderr, "ERROR: failed to read json, rows_per_tbl input mistake\n");
        goto PARSE_OVER;
      }      

      cJSON* maxSqlLen = cJSON_GetObjectItem(root, "max_sql_len");
      if (maxSqlLen && maxSqlLen->type == cJSON_Number) {
        g_args.max_sql_len = maxSqlLen->valueint;
      } else if (!maxSqlLen) {
        g_args.max_sql_len = TSDB_PAYLOAD_SIZE;
      } else {
        fprintf(stderr, "ERROR: failed to read json, max_sql_len input mistake\n");
        goto PARSE_OVER;
      }
 

      cJSON* numRecPerReq = cJSON_GetObjectItem(root, "num_of_records_per_req");
      if (numRecPerReq && numRecPerReq->type == cJSON_Number) {
        g_args.num_of_RPR = numRecPerReq->valueint;
      } else if (!numRecPerReq) {
        g_args.num_of_RPR = 100;
      } else {
        printf("ERROR: failed to read json, num_of_records_per_req not found\n");
        goto PARSE_OVER;
      }
 
  cJSON *answerPrompt = cJSON_GetObjectItem(root, "confirm_parameter_prompt"); // yes, no,
  if (answerPrompt 
          && answerPrompt->type == cJSON_String
          && answerPrompt->valuestring != NULL) {
    if (0 == strncasecmp(answerPrompt->valuestring, "yes", 3)) {
      g_args.answer_yes = false;
    } else if (0 == strncasecmp(answerPrompt->valuestring, "no", 2)) {
      g_args.answer_yes = true;
    } else {
      g_args.answer_yes = false;
    }
  } else if (!answerPrompt) {
    g_args.answer_yes = false;
  } else {
    printf("ERROR: failed to read json, confirm_parameter_prompt not found\n");
    goto PARSE_OVER;
  }  

  cJSON* dbs = cJSON_GetObjectItem(root, "databases");
  if (!dbs || dbs->type != cJSON_Array) {
    printf("ERROR: failed to read json, databases not found\n");
    goto PARSE_OVER;
  }

  int dbSize = cJSON_GetArraySize(dbs);
  if (dbSize > MAX_DB_COUNT) {
    fprintf(stderr,
            "ERROR: failed to read json, databases size overflow, max database is %d\n",
            MAX_DB_COUNT);
    goto PARSE_OVER;
  }

  g_Dbs.dbCount = dbSize;
  for (int i = 0; i < dbSize; ++i) {
    cJSON* dbinfos = cJSON_GetArrayItem(dbs, i);
    if (dbinfos == NULL) continue;

    // dbinfo 
    cJSON *dbinfo = cJSON_GetObjectItem(dbinfos, "dbinfo");
    if (!dbinfo || dbinfo->type != cJSON_Object) {
      printf("ERROR: failed to read json, dbinfo not found\n");
      goto PARSE_OVER;
    }
    
    cJSON *dbName = cJSON_GetObjectItem(dbinfo, "name");
    if (!dbName || dbName->type != cJSON_String || dbName->valuestring == NULL) {
      printf("ERROR: failed to read json, db name not found\n");
      goto PARSE_OVER;
    }
    tstrncpy(g_Dbs.db[i].dbName, dbName->valuestring, MAX_DB_NAME_SIZE);

    cJSON *drop = cJSON_GetObjectItem(dbinfo, "drop");
    if (drop && drop->type == cJSON_String && drop->valuestring != NULL) {
      if (0 == strncasecmp(drop->valuestring, "yes", 3)) {
        g_Dbs.db[i].drop = 1;
      } else {
        g_Dbs.db[i].drop = 0;
      }        
    } else if (!drop) {
      g_Dbs.db[i].drop = 0;
    } else {
      printf("ERROR: failed to read json, drop not found\n");
      goto PARSE_OVER;
    }

    cJSON *precision = cJSON_GetObjectItem(dbinfo, "precision");
    if (precision && precision->type == cJSON_String && precision->valuestring != NULL) {
      tstrncpy(g_Dbs.db[i].dbCfg.precision, precision->valuestring, MAX_DB_NAME_SIZE);
    } else if (!precision) {
      //tstrncpy(g_Dbs.db[i].dbCfg.precision, "ms", MAX_DB_NAME_SIZE);
      memset(g_Dbs.db[i].dbCfg.precision, 0, MAX_DB_NAME_SIZE);
    } else {
      printf("ERROR: failed to read json, precision not found\n");
      goto PARSE_OVER;
    }

    cJSON* update = cJSON_GetObjectItem(dbinfo, "update");
    if (update && update->type == cJSON_Number) {
      g_Dbs.db[i].dbCfg.update = update->valueint;
    } else if (!update) {
      g_Dbs.db[i].dbCfg.update = -1;
    } else {
      printf("ERROR: failed to read json, update not found\n");
      goto PARSE_OVER;
    }

    cJSON* replica = cJSON_GetObjectItem(dbinfo, "replica");
    if (replica && replica->type == cJSON_Number) {
      g_Dbs.db[i].dbCfg.replica = replica->valueint;
    } else if (!replica) {
      g_Dbs.db[i].dbCfg.replica = -1;
    } else {
      printf("ERROR: failed to read json, replica not found\n");
      goto PARSE_OVER;
    }

    cJSON* keep = cJSON_GetObjectItem(dbinfo, "keep");
    if (keep && keep->type == cJSON_Number) {
      g_Dbs.db[i].dbCfg.keep = keep->valueint;
    } else if (!keep) {
      g_Dbs.db[i].dbCfg.keep = -1;
    } else {
     printf("ERROR: failed to read json, keep not found\n");
     goto PARSE_OVER;
    }
    
    cJSON* days = cJSON_GetObjectItem(dbinfo, "days");
    if (days && days->type == cJSON_Number) {
      g_Dbs.db[i].dbCfg.days = days->valueint;
    } else if (!days) {
      g_Dbs.db[i].dbCfg.days = -1;
    } else {
     printf("ERROR: failed to read json, days not found\n");
     goto PARSE_OVER;
    }
    
    cJSON* cache = cJSON_GetObjectItem(dbinfo, "cache");
    if (cache && cache->type == cJSON_Number) {
      g_Dbs.db[i].dbCfg.cache = cache->valueint;
    } else if (!cache) {
      g_Dbs.db[i].dbCfg.cache = -1;
    } else {
     printf("ERROR: failed to read json, cache not found\n");
     goto PARSE_OVER;
    }
        
    cJSON* blocks= cJSON_GetObjectItem(dbinfo, "blocks");
    if (blocks && blocks->type == cJSON_Number) {
      g_Dbs.db[i].dbCfg.blocks = blocks->valueint;
    } else if (!blocks) {
      g_Dbs.db[i].dbCfg.blocks = -1;
    } else {
     printf("ERROR: failed to read json, block not found\n");
     goto PARSE_OVER;
    }

    //cJSON* maxtablesPerVnode= cJSON_GetObjectItem(dbinfo, "maxtablesPerVnode");
    //if (maxtablesPerVnode && maxtablesPerVnode->type == cJSON_Number) {
    //  g_Dbs.db[i].dbCfg.maxtablesPerVnode = maxtablesPerVnode->valueint;
    //} else if (!maxtablesPerVnode) {
    //  g_Dbs.db[i].dbCfg.maxtablesPerVnode = TSDB_DEFAULT_TABLES;
    //} else {
    // printf("failed to read json, maxtablesPerVnode not found");
    // goto PARSE_OVER;
    //}

    cJSON* minRows= cJSON_GetObjectItem(dbinfo, "minRows");
    if (minRows && minRows->type == cJSON_Number) {
      g_Dbs.db[i].dbCfg.minRows = minRows->valueint;
    } else if (!minRows) {
      g_Dbs.db[i].dbCfg.minRows = -1;
    } else {
     printf("ERROR: failed to read json, minRows not found\n");
     goto PARSE_OVER;
    }

    cJSON* maxRows= cJSON_GetObjectItem(dbinfo, "maxRows");
    if (maxRows && maxRows->type == cJSON_Number) {
      g_Dbs.db[i].dbCfg.maxRows = maxRows->valueint;
    } else if (!maxRows) {
      g_Dbs.db[i].dbCfg.maxRows = -1;
    } else {
     printf("ERROR: failed to read json, maxRows not found\n");
     goto PARSE_OVER;
    }

    cJSON* comp= cJSON_GetObjectItem(dbinfo, "comp");
    if (comp && comp->type == cJSON_Number) {
      g_Dbs.db[i].dbCfg.comp = comp->valueint;
    } else if (!comp) {
      g_Dbs.db[i].dbCfg.comp = -1;
    } else {
     printf("ERROR: failed to read json, comp not found\n");
     goto PARSE_OVER;
    }

    cJSON* walLevel= cJSON_GetObjectItem(dbinfo, "walLevel");
    if (walLevel && walLevel->type == cJSON_Number) {
      g_Dbs.db[i].dbCfg.walLevel = walLevel->valueint;
    } else if (!walLevel) {
      g_Dbs.db[i].dbCfg.walLevel = -1;
    } else {
     printf("ERROR: failed to read json, walLevel not found\n");
     goto PARSE_OVER;
    }

    cJSON* cacheLast= cJSON_GetObjectItem(dbinfo, "cachelast");
    if (cacheLast && cacheLast->type == cJSON_Number) {
      g_Dbs.db[i].dbCfg.cacheLast = cacheLast->valueint;
    } else if (!cacheLast) {
      g_Dbs.db[i].dbCfg.cacheLast = -1;
    } else {
     printf("ERROR: failed to read json, cacheLast not found\n");
     goto PARSE_OVER;
    }

    cJSON* quorum= cJSON_GetObjectItem(dbinfo, "quorum");
    if (quorum && quorum->type == cJSON_Number) {
      g_Dbs.db[i].dbCfg.quorum = quorum->valueint;
    } else if (!quorum) {
      g_Dbs.db[i].dbCfg.quorum = 1;
    } else {
     printf("failed to read json, quorum input mistake");
     goto PARSE_OVER;
    }

    cJSON* fsync= cJSON_GetObjectItem(dbinfo, "fsync");
    if (fsync && fsync->type == cJSON_Number) {
      g_Dbs.db[i].dbCfg.fsync = fsync->valueint;
    } else if (!fsync) {
      g_Dbs.db[i].dbCfg.fsync = -1;
    } else {
     printf("ERROR: failed to read json, fsync not found\n");
     goto PARSE_OVER;
    }    

    // super_talbes 
    cJSON *stables = cJSON_GetObjectItem(dbinfos, "super_tables");
    if (!stables || stables->type != cJSON_Array) {
      printf("ERROR: failed to read json, super_tables not found\n");
      goto PARSE_OVER;
    }    
    
    int stbSize = cJSON_GetArraySize(stables);
    if (stbSize > MAX_SUPER_TABLE_COUNT) {
      fprintf(stderr,
              "ERROR: failed to read json, databases size overflow, max database is %d\n",
              MAX_SUPER_TABLE_COUNT);
      goto PARSE_OVER;
    }

    g_Dbs.db[i].superTblCount = stbSize;
    for (int j = 0; j < stbSize; ++j) {
      cJSON* stbInfo = cJSON_GetArrayItem(stables, j);
      if (stbInfo == NULL) continue;
    
      // dbinfo 
      cJSON *stbName = cJSON_GetObjectItem(stbInfo, "name");
      if (!stbName || stbName->type != cJSON_String || stbName->valuestring == NULL) {
        printf("ERROR: failed to read json, stb name not found\n");
        goto PARSE_OVER;
      }
      tstrncpy(g_Dbs.db[i].superTbls[j].sTblName, stbName->valuestring, MAX_TB_NAME_SIZE);
    
      cJSON *prefix = cJSON_GetObjectItem(stbInfo, "childtable_prefix");
      if (!prefix || prefix->type != cJSON_String || prefix->valuestring == NULL) {
        printf("ERROR: failed to read json, childtable_prefix not found\n");
        goto PARSE_OVER;
      }
      tstrncpy(g_Dbs.db[i].superTbls[j].childTblPrefix, prefix->valuestring, MAX_DB_NAME_SIZE);

      cJSON *autoCreateTbl = cJSON_GetObjectItem(stbInfo, "auto_create_table"); // yes, no, null
      if (autoCreateTbl
              && autoCreateTbl->type == cJSON_String
              && autoCreateTbl->valuestring != NULL) {
        if (0 == strncasecmp(autoCreateTbl->valuestring, "yes", 3)) {
          g_Dbs.db[i].superTbls[j].autoCreateTable = AUTO_CREATE_SUBTBL;
        } else if (0 == strncasecmp(autoCreateTbl->valuestring, "no", 2)) {
          g_Dbs.db[i].superTbls[j].autoCreateTable = PRE_CREATE_SUBTBL;
        } else {
          g_Dbs.db[i].superTbls[j].autoCreateTable = PRE_CREATE_SUBTBL;
        }
      } else if (!autoCreateTbl) {
        g_Dbs.db[i].superTbls[j].autoCreateTable = PRE_CREATE_SUBTBL;
      } else {
        printf("ERROR: failed to read json, auto_create_table not found\n");
        goto PARSE_OVER;
      }
      
      cJSON* batchCreateTbl = cJSON_GetObjectItem(stbInfo, "batch_create_tbl_num");
      if (batchCreateTbl && batchCreateTbl->type == cJSON_Number) {
        g_Dbs.db[i].superTbls[j].batchCreateTableNum = batchCreateTbl->valueint;
      } else if (!batchCreateTbl) {
        g_Dbs.db[i].superTbls[j].batchCreateTableNum = 1000;
      } else {
        printf("ERROR: failed to read json, batch_create_tbl_num not found\n");
        goto PARSE_OVER;
      }      

      cJSON *childTblExists = cJSON_GetObjectItem(stbInfo, "child_table_exists"); // yes, no
      if (childTblExists
              && childTblExists->type == cJSON_String
              && childTblExists->valuestring != NULL) {
        if (0 == strncasecmp(childTblExists->valuestring, "yes", 3)) {
          g_Dbs.db[i].superTbls[j].childTblExists = TBL_ALREADY_EXISTS;
        } else if (0 == strncasecmp(childTblExists->valuestring, "no", 2)) {
          g_Dbs.db[i].superTbls[j].childTblExists = TBL_NO_EXISTS;
        } else {
          g_Dbs.db[i].superTbls[j].childTblExists = TBL_NO_EXISTS;
        }
      } else if (!childTblExists) {
        g_Dbs.db[i].superTbls[j].childTblExists = TBL_NO_EXISTS;
      } else {
        printf("ERROR: failed to read json, child_table_exists not found\n");
        goto PARSE_OVER;
      }
      
      cJSON* count = cJSON_GetObjectItem(stbInfo, "childtable_count");
      if (!count || count->type != cJSON_Number || 0 >= count->valueint) {
        printf("ERROR: failed to read json, childtable_count not found\n");
        goto PARSE_OVER;
      }
      g_Dbs.db[i].superTbls[j].childTblCount = count->valueint;

      cJSON *dataSource = cJSON_GetObjectItem(stbInfo, "data_source");
      if (dataSource && dataSource->type == cJSON_String
              && dataSource->valuestring != NULL) {
        tstrncpy(g_Dbs.db[i].superTbls[j].dataSource,
                dataSource->valuestring, MAX_DB_NAME_SIZE);
      } else if (!dataSource) {
        tstrncpy(g_Dbs.db[i].superTbls[j].dataSource, "rand", MAX_DB_NAME_SIZE);
      } else {
        printf("ERROR: failed to read json, data_source not found\n");
        goto PARSE_OVER;
      }

      cJSON *insertMode = cJSON_GetObjectItem(stbInfo, "insert_mode"); // taosc , restful
      if (insertMode && insertMode->type == cJSON_String
              && insertMode->valuestring != NULL) {
        tstrncpy(g_Dbs.db[i].superTbls[j].insertMode,
                insertMode->valuestring, MAX_DB_NAME_SIZE);
      } else if (!insertMode) {
        tstrncpy(g_Dbs.db[i].superTbls[j].insertMode, "taosc", MAX_DB_NAME_SIZE);
      } else {
        printf("ERROR: failed to read json, insert_mode not found\n");
        goto PARSE_OVER;
      }

      cJSON* childTbl_limit = cJSON_GetObjectItem(stbInfo, "childtable_limit");
      if (childTbl_limit) {
        if (childTbl_limit->type != cJSON_Number) {
            printf("ERROR: failed to read json, childtable_limit\n");
            goto PARSE_OVER;
        }
        g_Dbs.db[i].superTbls[j].childTblLimit = childTbl_limit->valueint;
      } else {
        g_Dbs.db[i].superTbls[j].childTblLimit = -1;    // select ... limit -1 means all query result
      }

      cJSON* childTbl_offset = cJSON_GetObjectItem(stbInfo, "childtable_offset");
      if (childTbl_offset) {
        if (childTbl_offset->type != cJSON_Number || 0 > childTbl_offset->valueint) {
            printf("ERROR: failed to read json, childtable_offset\n");
            goto PARSE_OVER;
        }
        g_Dbs.db[i].superTbls[j].childTblOffset = childTbl_offset->valueint;
      } else {
        g_Dbs.db[i].superTbls[j].childTblOffset = 0;
      }

      cJSON *ts = cJSON_GetObjectItem(stbInfo, "start_timestamp");
      if (ts && ts->type == cJSON_String && ts->valuestring != NULL) {
        tstrncpy(g_Dbs.db[i].superTbls[j].startTimestamp, ts->valuestring, MAX_DB_NAME_SIZE);
      } else if (!ts) {
        tstrncpy(g_Dbs.db[i].superTbls[j].startTimestamp, "now", MAX_DB_NAME_SIZE);
      } else {
        printf("ERROR: failed to read json, start_timestamp not found\n");
        goto PARSE_OVER;
      }

      cJSON* timestampStep = cJSON_GetObjectItem(stbInfo, "timestamp_step");
      if (timestampStep && timestampStep->type == cJSON_Number) {
        g_Dbs.db[i].superTbls[j].timeStampStep = timestampStep->valueint;
      } else if (!timestampStep) {
        g_Dbs.db[i].superTbls[j].timeStampStep = DEFAULT_TIMESTAMP_STEP;
      } else {
        printf("ERROR: failed to read json, timestamp_step not found\n");
        goto PARSE_OVER;
      }

      cJSON* sampleDataBufSize = cJSON_GetObjectItem(stbInfo, "sample_buf_size");
      if (sampleDataBufSize && sampleDataBufSize->type == cJSON_Number) {
        g_Dbs.db[i].superTbls[j].sampleDataBufSize = sampleDataBufSize->valueint;
        if (g_Dbs.db[i].superTbls[j].sampleDataBufSize < 1024*1024) {
          g_Dbs.db[i].superTbls[j].sampleDataBufSize = 1024*1024 + 1024;
        }
      } else if (!sampleDataBufSize) {
        g_Dbs.db[i].superTbls[j].sampleDataBufSize = 1024*1024 + 1024;
      } else {
        printf("ERROR: failed to read json, sample_buf_size not found\n");
        goto PARSE_OVER;
      }      

      cJSON *sampleFormat = cJSON_GetObjectItem(stbInfo, "sample_format");
      if (sampleFormat && sampleFormat->type == cJSON_String && sampleFormat->valuestring != NULL) {
        tstrncpy(g_Dbs.db[i].superTbls[j].sampleFormat,
                sampleFormat->valuestring, MAX_DB_NAME_SIZE);
      } else if (!sampleFormat) {
        tstrncpy(g_Dbs.db[i].superTbls[j].sampleFormat, "csv", MAX_DB_NAME_SIZE);
      } else {
        printf("ERROR: failed to read json, sample_format not found\n");
        goto PARSE_OVER;
      }      

      cJSON *sampleFile = cJSON_GetObjectItem(stbInfo, "sample_file");
      if (sampleFile && sampleFile->type == cJSON_String && sampleFile->valuestring != NULL) {
        tstrncpy(g_Dbs.db[i].superTbls[j].sampleFile,
                sampleFile->valuestring, MAX_FILE_NAME_LEN);
      } else if (!sampleFile) {
        memset(g_Dbs.db[i].superTbls[j].sampleFile, 0, MAX_FILE_NAME_LEN);
      } else {
        printf("ERROR: failed to read json, sample_file not found\n");
        goto PARSE_OVER;
      }          

      cJSON *tagsFile = cJSON_GetObjectItem(stbInfo, "tags_file");
      if (tagsFile && tagsFile->type == cJSON_String && tagsFile->valuestring != NULL) {
        tstrncpy(g_Dbs.db[i].superTbls[j].tagsFile,
                tagsFile->valuestring, MAX_FILE_NAME_LEN);
        if (0 == g_Dbs.db[i].superTbls[j].tagsFile[0]) {
          g_Dbs.db[i].superTbls[j].tagSource = 0;
        } else {
          g_Dbs.db[i].superTbls[j].tagSource = 1;
        }
      } else if (!tagsFile) {
        memset(g_Dbs.db[i].superTbls[j].tagsFile, 0, MAX_FILE_NAME_LEN);
        g_Dbs.db[i].superTbls[j].tagSource = 0;
      } else {
        printf("ERROR: failed to read json, tags_file not found\n");
        goto PARSE_OVER;
      }

      cJSON* maxSqlLen = cJSON_GetObjectItem(stbInfo, "max_sql_len");
      if (maxSqlLen && maxSqlLen->type == cJSON_Number) {
        int32_t len = maxSqlLen->valueint;
        if (len > TSDB_MAX_ALLOWED_SQL_LEN) {
          len = TSDB_MAX_ALLOWED_SQL_LEN;
        } else if (len < TSDB_MAX_SQL_LEN) {
          len = TSDB_MAX_SQL_LEN;
        }       
        g_Dbs.db[i].superTbls[j].maxSqlLen = len;
      } else if (!maxSqlLen) {
        g_Dbs.db[i].superTbls[j].maxSqlLen = TSDB_MAX_SQL_LEN;
      } else {
        printf("ERROR: failed to read json, maxSqlLen not found\n");
        goto PARSE_OVER;
      }      

      cJSON *multiThreadWriteOneTbl =
          cJSON_GetObjectItem(stbInfo, "multi_thread_write_one_tbl"); // no , yes
      if (multiThreadWriteOneTbl
              && multiThreadWriteOneTbl->type == cJSON_String
              && multiThreadWriteOneTbl->valuestring != NULL) {
        if (0 == strncasecmp(multiThreadWriteOneTbl->valuestring, "yes", 3)) {
          g_Dbs.db[i].superTbls[j].multiThreadWriteOneTbl = 1;
        } else {
          g_Dbs.db[i].superTbls[j].multiThreadWriteOneTbl = 0;
        }        
      } else if (!multiThreadWriteOneTbl) {
        g_Dbs.db[i].superTbls[j].multiThreadWriteOneTbl = 0;
      } else {
        printf("ERROR: failed to read json, multiThreadWriteOneTbl not found\n");
        goto PARSE_OVER;
      }

      cJSON* rowsPerTbl = cJSON_GetObjectItem(stbInfo, "rows_per_tbl");
      if (rowsPerTbl && rowsPerTbl->type == cJSON_Number) {
        g_Dbs.db[i].superTbls[j].rowsPerTbl = rowsPerTbl->valueint;
      } else if (!rowsPerTbl) {
        g_Dbs.db[i].superTbls[j].rowsPerTbl = 0; // 0 means progressive mode, > 0 mean interlace mode. max value is less or equ num_of_records_per_req
      } else {
        fprintf(stderr, "ERROR: failed to read json, rowsPerTbl input mistake\n");
        goto PARSE_OVER;
      }      

      cJSON* disorderRatio = cJSON_GetObjectItem(stbInfo, "disorder_ratio");
      if (disorderRatio && disorderRatio->type == cJSON_Number) {
        g_Dbs.db[i].superTbls[j].disorderRatio = disorderRatio->valueint;
      } else if (!disorderRatio) {
        g_Dbs.db[i].superTbls[j].disorderRatio = 0;
      } else {
        printf("ERROR: failed to read json, disorderRatio not found\n");
        goto PARSE_OVER;
      }      

      cJSON* disorderRange = cJSON_GetObjectItem(stbInfo, "disorder_range");
      if (disorderRange && disorderRange->type == cJSON_Number) {
        g_Dbs.db[i].superTbls[j].disorderRange = disorderRange->valueint;
      } else if (!disorderRange) {
        g_Dbs.db[i].superTbls[j].disorderRange = 1000;
      } else {
        printf("ERROR: failed to read json, disorderRange not found\n");
        goto PARSE_OVER;
      }

      cJSON* insertRows = cJSON_GetObjectItem(stbInfo, "insert_rows");
      if (insertRows && insertRows->type == cJSON_Number) {
        g_Dbs.db[i].superTbls[j].insertRows = insertRows->valueint;
      } else if (!insertRows) {
        g_Dbs.db[i].superTbls[j].insertRows = 0x7FFFFFFFFFFFFFFF;
      } else {
        fprintf(stderr, "failed to read json, insert_rows input mistake");
        goto PARSE_OVER;
      }

      cJSON* insertInterval = cJSON_GetObjectItem(stbInfo, "insert_interval");
      if (insertInterval && insertInterval->type == cJSON_Number) {
        g_Dbs.db[i].superTbls[j].insertInterval = insertInterval->valueint;
      } else if (!insertInterval) {
        debugPrint("%s() LN%d: stable insert interval be overrided by global %d.\n",
                __func__, __LINE__, g_args.insert_interval);
        g_Dbs.db[i].superTbls[j].insertInterval = g_args.insert_interval;
      } else {
        fprintf(stderr, "failed to read json, insert_interval input mistake");
        goto PARSE_OVER;
      }

      if (NO_CREATE_SUBTBL == g_Dbs.db[i].superTbls[j].autoCreateTable
              || (TBL_ALREADY_EXISTS == g_Dbs.db[i].superTbls[j].childTblExists)) {
        continue;
      }

      int retVal = getColumnAndTagTypeFromInsertJsonFile(stbInfo, &g_Dbs.db[i].superTbls[j]);
      if (false == retVal) {
        goto PARSE_OVER;
      }      
    }    
  }

  ret = true;

PARSE_OVER:
  //free(content);
  //cJSON_Delete(root);
  //fclose(fp);
  return ret;
}

static bool getMetaFromQueryJsonFile(cJSON* root) {
  bool  ret = false;

  cJSON* cfgdir = cJSON_GetObjectItem(root, "cfgdir");
  if (cfgdir && cfgdir->type == cJSON_String && cfgdir->valuestring != NULL) {
    tstrncpy(g_queryInfo.cfgDir, cfgdir->valuestring, MAX_FILE_NAME_LEN);
  }

  cJSON* host = cJSON_GetObjectItem(root, "host");
  if (host && host->type == cJSON_String && host->valuestring != NULL) {
    tstrncpy(g_queryInfo.host, host->valuestring, MAX_DB_NAME_SIZE);
  } else if (!host) {
    tstrncpy(g_queryInfo.host, "127.0.0.1", MAX_DB_NAME_SIZE);
  } else {
    printf("ERROR: failed to read json, host not found\n");
    goto PARSE_OVER;
  }

  cJSON* port = cJSON_GetObjectItem(root, "port");
  if (port && port->type == cJSON_Number) {
    g_queryInfo.port = port->valueint;
  } else if (!port) {
    g_queryInfo.port = 6030;
  }

  cJSON* user = cJSON_GetObjectItem(root, "user");
  if (user && user->type == cJSON_String && user->valuestring != NULL) {
    tstrncpy(g_queryInfo.user, user->valuestring, MAX_DB_NAME_SIZE);   
  } else if (!user) {
    tstrncpy(g_queryInfo.user, "root", MAX_DB_NAME_SIZE); ;
  }

  cJSON* password = cJSON_GetObjectItem(root, "password");
  if (password && password->type == cJSON_String && password->valuestring != NULL) {
    tstrncpy(g_queryInfo.password, password->valuestring, MAX_DB_NAME_SIZE);
  } else if (!password) {
    tstrncpy(g_queryInfo.password, "taosdata", MAX_DB_NAME_SIZE);;
  }

  cJSON *answerPrompt = cJSON_GetObjectItem(root, "confirm_parameter_prompt"); // yes, no,
  if (answerPrompt && answerPrompt->type == cJSON_String
          && answerPrompt->valuestring != NULL) {
    if (0 == strncasecmp(answerPrompt->valuestring, "yes", 3)) {
      g_args.answer_yes = false;
    } else if (0 == strncasecmp(answerPrompt->valuestring, "no", 2)) {
      g_args.answer_yes = true;
    } else {
      g_args.answer_yes = false;
    }
  } else if (!answerPrompt) {
    g_args.answer_yes = false;
  } else {
    printf("ERROR: failed to read json, confirm_parameter_prompt not found\n");
    goto PARSE_OVER;
  }  

  cJSON* dbs = cJSON_GetObjectItem(root, "databases");
  if (dbs && dbs->type == cJSON_String && dbs->valuestring != NULL) {
    tstrncpy(g_queryInfo.dbName, dbs->valuestring, MAX_DB_NAME_SIZE);
  } else if (!dbs) {
    printf("ERROR: failed to read json, databases not found\n");
    goto PARSE_OVER;
  }

  cJSON* queryMode = cJSON_GetObjectItem(root, "query_mode");
  if (queryMode && queryMode->type == cJSON_String && queryMode->valuestring != NULL) {
    tstrncpy(g_queryInfo.queryMode, queryMode->valuestring, MAX_TB_NAME_SIZE);
  } else if (!queryMode) {
    tstrncpy(g_queryInfo.queryMode, "taosc", MAX_TB_NAME_SIZE);
  } else {
    printf("ERROR: failed to read json, query_mode not found\n");
    goto PARSE_OVER;
  }
  
  // super_table_query 
  cJSON *superQuery = cJSON_GetObjectItem(root, "specified_table_query");
  if (!superQuery) {
    g_queryInfo.superQueryInfo.concurrent = 0;
    g_queryInfo.superQueryInfo.sqlCount = 0;
  } else if (superQuery->type != cJSON_Object) {
    printf("ERROR: failed to read json, super_table_query not found\n");
    goto PARSE_OVER;
  } else {  
    cJSON* rate = cJSON_GetObjectItem(superQuery, "query_interval");
    if (rate && rate->type == cJSON_Number) {
      g_queryInfo.superQueryInfo.rate = rate->valueint;
    } else if (!rate) {
      g_queryInfo.superQueryInfo.rate = 0;
    }
  
    cJSON* concurrent = cJSON_GetObjectItem(superQuery, "concurrent");
    if (concurrent && concurrent->type == cJSON_Number) {
      g_queryInfo.superQueryInfo.concurrent = concurrent->valueint;
    } else if (!concurrent) {
      g_queryInfo.superQueryInfo.concurrent = 1;
    }
  
    cJSON* mode = cJSON_GetObjectItem(superQuery, "mode");
    if (mode && mode->type == cJSON_String && mode->valuestring != NULL) {
      if (0 == strcmp("sync", mode->valuestring)) {      
        g_queryInfo.superQueryInfo.subscribeMode = 0;
      } else if (0 == strcmp("async", mode->valuestring)) {      
        g_queryInfo.superQueryInfo.subscribeMode = 1;
      } else {
        printf("ERROR: failed to read json, subscribe mod error\n");
        goto PARSE_OVER;
      }
    } else {
      g_queryInfo.superQueryInfo.subscribeMode = 0;
    }
    
    cJSON* interval = cJSON_GetObjectItem(superQuery, "interval");
    if (interval && interval->type == cJSON_Number) {
      g_queryInfo.superQueryInfo.subscribeInterval = interval->valueint;
    } else if (!interval) {    
      //printf("failed to read json, subscribe interval no found\n");
      //goto PARSE_OVER;
      g_queryInfo.superQueryInfo.subscribeInterval = 10000;
    }
  
    cJSON* restart = cJSON_GetObjectItem(superQuery, "restart");
    if (restart && restart->type == cJSON_String && restart->valuestring != NULL) {
      if (0 == strcmp("yes", restart->valuestring)) {      
        g_queryInfo.superQueryInfo.subscribeRestart = 1;
      } else if (0 == strcmp("no", restart->valuestring)) {      
        g_queryInfo.superQueryInfo.subscribeRestart = 0;
      } else {
        printf("ERROR: failed to read json, subscribe restart error\n");
        goto PARSE_OVER;
      }
    } else {
      g_queryInfo.superQueryInfo.subscribeRestart = 1;
    }
  
    cJSON* keepProgress = cJSON_GetObjectItem(superQuery, "keepProgress");
    if (keepProgress
            && keepProgress->type == cJSON_String
            && keepProgress->valuestring != NULL) {
      if (0 == strcmp("yes", keepProgress->valuestring)) {      
        g_queryInfo.superQueryInfo.subscribeKeepProgress = 1;
      } else if (0 == strcmp("no", keepProgress->valuestring)) {      
        g_queryInfo.superQueryInfo.subscribeKeepProgress = 0;
      } else {
        printf("ERROR: failed to read json, subscribe keepProgress error\n");
        goto PARSE_OVER;
      }
    } else {
      g_queryInfo.superQueryInfo.subscribeKeepProgress = 0;
    }

    // sqls   
    cJSON* superSqls = cJSON_GetObjectItem(superQuery, "sqls");
    if (!superSqls) {
      g_queryInfo.superQueryInfo.sqlCount = 0;
    } else if (superSqls->type != cJSON_Array) {
      printf("ERROR: failed to read json, super sqls not found\n");
      goto PARSE_OVER;
    } else {  
      int superSqlSize = cJSON_GetArraySize(superSqls);
      if (superSqlSize > MAX_QUERY_SQL_COUNT) {
        printf("ERROR: failed to read json, query sql size overflow, max is %d\n", MAX_QUERY_SQL_COUNT);
        goto PARSE_OVER;
      }

      g_queryInfo.superQueryInfo.sqlCount = superSqlSize;
      for (int j = 0; j < superSqlSize; ++j) {
        cJSON* sql = cJSON_GetArrayItem(superSqls, j);
        if (sql == NULL) continue;
      
        cJSON *sqlStr = cJSON_GetObjectItem(sql, "sql");
        if (!sqlStr || sqlStr->type != cJSON_String || sqlStr->valuestring == NULL) {
          printf("ERROR: failed to read json, sql not found\n");
          goto PARSE_OVER;
        }
        tstrncpy(g_queryInfo.superQueryInfo.sql[j], sqlStr->valuestring, MAX_QUERY_SQL_LENGTH);

        cJSON *result = cJSON_GetObjectItem(sql, "result");
        if (NULL != result && result->type == cJSON_String && result->valuestring != NULL) {
          tstrncpy(g_queryInfo.superQueryInfo.result[j], result->valuestring, MAX_FILE_NAME_LEN);
        } else if (NULL == result) {
          memset(g_queryInfo.superQueryInfo.result[j], 0, MAX_FILE_NAME_LEN);
        } else {
          printf("ERROR: failed to read json, super query result file not found\n");
          goto PARSE_OVER;
        } 
      }
    }
  }

  // sub_table_query 
  cJSON *subQuery = cJSON_GetObjectItem(root, "super_table_query");
  if (!subQuery) {
    g_queryInfo.subQueryInfo.threadCnt = 0;
    g_queryInfo.subQueryInfo.sqlCount = 0;
  } else if (subQuery->type != cJSON_Object) {
    printf("ERROR: failed to read json, sub_table_query not found\n");
    ret = true;
    goto PARSE_OVER;
  } else {
    cJSON* subrate = cJSON_GetObjectItem(subQuery, "query_interval");
    if (subrate && subrate->type == cJSON_Number) {
      g_queryInfo.subQueryInfo.rate = subrate->valueint;
    } else if (!subrate) {
      g_queryInfo.subQueryInfo.rate = 0;
    }

    cJSON* threads = cJSON_GetObjectItem(subQuery, "threads");
    if (threads && threads->type == cJSON_Number) {
      g_queryInfo.subQueryInfo.threadCnt = threads->valueint;
    } else if (!threads) {
      g_queryInfo.subQueryInfo.threadCnt = 1;
    }

    //cJSON* subTblCnt = cJSON_GetObjectItem(subQuery, "childtable_count");
    //if (subTblCnt && subTblCnt->type == cJSON_Number) {
    //  g_queryInfo.subQueryInfo.childTblCount = subTblCnt->valueint;
    //} else if (!subTblCnt) {
    //  g_queryInfo.subQueryInfo.childTblCount = 0;
    //}

    cJSON* stblname = cJSON_GetObjectItem(subQuery, "stblname");
    if (stblname && stblname->type == cJSON_String && stblname->valuestring != NULL) {
      tstrncpy(g_queryInfo.subQueryInfo.sTblName, stblname->valuestring, MAX_TB_NAME_SIZE);
    } else {
      printf("ERROR: failed to read json, super table name not found\n");
      goto PARSE_OVER;
    }

    cJSON* submode = cJSON_GetObjectItem(subQuery, "mode");
    if (submode && submode->type == cJSON_String && submode->valuestring != NULL) {
      if (0 == strcmp("sync", submode->valuestring)) {      
        g_queryInfo.subQueryInfo.subscribeMode = 0;
      } else if (0 == strcmp("async", submode->valuestring)) {      
        g_queryInfo.subQueryInfo.subscribeMode = 1;
      } else {
        printf("ERROR: failed to read json, subscribe mod error\n");
        goto PARSE_OVER;
      }
    } else {
      g_queryInfo.subQueryInfo.subscribeMode = 0;
    }

    cJSON* subinterval = cJSON_GetObjectItem(subQuery, "interval");
    if (subinterval && subinterval->type == cJSON_Number) {
      g_queryInfo.subQueryInfo.subscribeInterval = subinterval->valueint;
    } else if (!subinterval) {    
      //printf("failed to read json, subscribe interval no found\n");
      //goto PARSE_OVER;
      g_queryInfo.subQueryInfo.subscribeInterval = 10000;
    }
  
    cJSON* subrestart = cJSON_GetObjectItem(subQuery, "restart");
    if (subrestart && subrestart->type == cJSON_String && subrestart->valuestring != NULL) {
      if (0 == strcmp("yes", subrestart->valuestring)) {      
        g_queryInfo.subQueryInfo.subscribeRestart = 1;
      } else if (0 == strcmp("no", subrestart->valuestring)) {      
        g_queryInfo.subQueryInfo.subscribeRestart = 0;
      } else {
        printf("ERROR: failed to read json, subscribe restart error\n");
        goto PARSE_OVER;
      }
    } else {
      g_queryInfo.subQueryInfo.subscribeRestart = 1;
    }
  
    cJSON* subkeepProgress = cJSON_GetObjectItem(subQuery, "keepProgress");
    if (subkeepProgress &&
            subkeepProgress->type == cJSON_String
            && subkeepProgress->valuestring != NULL) {
      if (0 == strcmp("yes", subkeepProgress->valuestring)) {      
        g_queryInfo.subQueryInfo.subscribeKeepProgress = 1;
      } else if (0 == strcmp("no", subkeepProgress->valuestring)) {      
        g_queryInfo.subQueryInfo.subscribeKeepProgress = 0;
      } else {
        printf("ERROR: failed to read json, subscribe keepProgress error\n");
        goto PARSE_OVER;
      }
    } else {
      g_queryInfo.subQueryInfo.subscribeKeepProgress = 0;
    }  

    // sqls     
    cJSON* subsqls = cJSON_GetObjectItem(subQuery, "sqls");
    if (!subsqls) {
      g_queryInfo.subQueryInfo.sqlCount = 0;
    } else if (subsqls->type != cJSON_Array) {
      printf("ERROR: failed to read json, super sqls not found\n");
      goto PARSE_OVER;
    } else {  
      int superSqlSize = cJSON_GetArraySize(subsqls);
      if (superSqlSize > MAX_QUERY_SQL_COUNT) {
        printf("ERROR: failed to read json, query sql size overflow, max is %d\n", MAX_QUERY_SQL_COUNT);
        goto PARSE_OVER;
      }
    
      g_queryInfo.subQueryInfo.sqlCount = superSqlSize;
      for (int j = 0; j < superSqlSize; ++j) {      
        cJSON* sql = cJSON_GetArrayItem(subsqls, j);
        if (sql == NULL) continue;
        
        cJSON *sqlStr = cJSON_GetObjectItem(sql, "sql");
        if (!sqlStr || sqlStr->type != cJSON_String || sqlStr->valuestring == NULL) {
          printf("ERROR: failed to read json, sql not found\n");
          goto PARSE_OVER;
        }
        tstrncpy(g_queryInfo.subQueryInfo.sql[j], sqlStr->valuestring, MAX_QUERY_SQL_LENGTH);

        cJSON *result = cJSON_GetObjectItem(sql, "result");
        if (result != NULL && result->type == cJSON_String && result->valuestring != NULL){
          tstrncpy(g_queryInfo.subQueryInfo.result[j], result->valuestring, MAX_FILE_NAME_LEN);
        } else if (NULL == result) {
          memset(g_queryInfo.subQueryInfo.result[j], 0, MAX_FILE_NAME_LEN);
        }  else {
          printf("ERROR: failed to read json, sub query result file not found\n");
          goto PARSE_OVER;
        } 
      }
    }
  }

  ret = true;

PARSE_OVER:
  //free(content);
  //cJSON_Delete(root);
  //fclose(fp);
  return ret;
}

static bool getInfoFromJsonFile(char* file) {
    debugPrint("%s %d %s\n", __func__, __LINE__, file);

  FILE *fp = fopen(file, "r");
  if (!fp) {
    printf("failed to read %s, reason:%s\n", file, strerror(errno));
    return false;
  }

  bool  ret = false;
  int   maxLen = 64000;
  char *content = calloc(1, maxLen + 1);
  int   len = fread(content, 1, maxLen, fp);
  if (len <= 0) {
    free(content);
    fclose(fp);
    printf("failed to read %s, content is null", file);
    return false;
  }

  content[len] = 0;
  cJSON* root = cJSON_Parse(content);
  if (root == NULL) {
    printf("ERROR: failed to cjson parse %s, invalid json format\n", file);
    goto PARSE_OVER;
  }

  cJSON* filetype = cJSON_GetObjectItem(root, "filetype");
  if (filetype && filetype->type == cJSON_String && filetype->valuestring != NULL) {
    if (0 == strcasecmp("insert", filetype->valuestring)) {
      g_args.test_mode = INSERT_TEST;
    } else if (0 == strcasecmp("query", filetype->valuestring)) {
      g_args.test_mode = QUERY_TEST;
    } else if (0 == strcasecmp("subscribe", filetype->valuestring)) {
      g_args.test_mode = SUBSCRIBE_TEST;
    } else {
      printf("ERROR: failed to read json, filetype not support\n");
      goto PARSE_OVER;
    }
  } else if (!filetype) {
    g_args.test_mode = INSERT_TEST;
  } else {
    printf("ERROR: failed to read json, filetype not found\n");
    goto PARSE_OVER;
  }

  if (INSERT_TEST == g_args.test_mode) {
    ret = getMetaFromInsertJsonFile(root);
  } else if (QUERY_TEST == g_args.test_mode) {
    ret = getMetaFromQueryJsonFile(root);
  } else if (SUBSCRIBE_TEST == g_args.test_mode) {
    ret = getMetaFromQueryJsonFile(root);
  } else {
    printf("ERROR: input json file type error! please input correct file type: insert or query or subscribe\n");
    goto PARSE_OVER;
  } 

PARSE_OVER:
  free(content);
  cJSON_Delete(root);
  fclose(fp);
  return ret;
}

static void prepareSampleData() {
  for (int i = 0; i < g_Dbs.dbCount; i++) {    
    for (int j = 0; j < g_Dbs.db[i].superTblCount; j++) {
      //if (0 == strncasecmp(g_Dbs.db[i].superTbls[j].dataSource, "sample", 6)) {
      //  readSampleFromFileToMem(&g_Dbs.db[i].superTbls[j]);
      //}

      if (g_Dbs.db[i].superTbls[j].tagsFile[0] != 0) {
        (void)readTagFromCsvFileToMem(&g_Dbs.db[i].superTbls[j]);
      }
    }
  }
}

static void postFreeResource() {
  tmfclose(g_fpOfInsertResult);
  for (int i = 0; i < g_Dbs.dbCount; i++) {    
    for (int j = 0; j < g_Dbs.db[i].superTblCount; j++) {
      if (0 != g_Dbs.db[i].superTbls[j].colsOfCreateChildTable) {
        free(g_Dbs.db[i].superTbls[j].colsOfCreateChildTable);
        g_Dbs.db[i].superTbls[j].colsOfCreateChildTable = NULL;
      }
      if (0 != g_Dbs.db[i].superTbls[j].sampleDataBuf) {
        free(g_Dbs.db[i].superTbls[j].sampleDataBuf);
        g_Dbs.db[i].superTbls[j].sampleDataBuf = NULL;
      }
      if (0 != g_Dbs.db[i].superTbls[j].tagDataBuf) {
        free(g_Dbs.db[i].superTbls[j].tagDataBuf);
        g_Dbs.db[i].superTbls[j].tagDataBuf = NULL;
      }
      if (0 != g_Dbs.db[i].superTbls[j].childTblName) {
        free(g_Dbs.db[i].superTbls[j].childTblName);
        g_Dbs.db[i].superTbls[j].childTblName = NULL;
      }
    }
  }
}

static int getRowDataFromSample(char*  dataBuf, int maxLen, int64_t timestamp,
      SSuperTable* superTblInfo, int* sampleUsePos) {
  if ((*sampleUsePos) == MAX_SAMPLES_ONCE_FROM_FILE) {
/*    int ret = readSampleFromCsvFileToMem(superTblInfo);
    if (0 != ret) {
      tmfree(superTblInfo->sampleDataBuf);
      superTblInfo->sampleDataBuf = NULL;
      return -1;
    }
*/
    *sampleUsePos = 0;
  }

  int    dataLen = 0;

  dataLen += snprintf(dataBuf + dataLen, maxLen - dataLen,
          "(%" PRId64 ", ", timestamp);
  dataLen += snprintf(dataBuf + dataLen, maxLen - dataLen,
          "%s", superTblInfo->sampleDataBuf + superTblInfo->lenOfOneRow * (*sampleUsePos));
  dataLen += snprintf(dataBuf + dataLen, maxLen - dataLen, ")");

  (*sampleUsePos)++;
 
  return dataLen;
}

static int generateRowData(char*  dataBuf, int maxLen, int64_t timestamp, SSuperTable* stbInfo) {
  int    dataLen = 0;
  dataLen += snprintf(dataBuf + dataLen, maxLen - dataLen, "(%" PRId64 ", ", timestamp);
  for (int i = 0; i < stbInfo->columnCount; i++) {    
    if ((0 == strncasecmp(stbInfo->columns[i].dataType, "binary", 6))
            || (0 == strncasecmp(stbInfo->columns[i].dataType, "nchar", 5))) {
      if (stbInfo->columns[i].dataLen > TSDB_MAX_BINARY_LEN) {
        printf("binary or nchar length overflow, max size:%u\n",
                (uint32_t)TSDB_MAX_BINARY_LEN);
        return (-1);
      }

      char* buf = (char*)calloc(stbInfo->columns[i].dataLen+1, 1);
      if (NULL == buf) {
        printf("calloc failed! size:%d\n", stbInfo->columns[i].dataLen);
        return (-1);
      }
      rand_string(buf, stbInfo->columns[i].dataLen);
      dataLen += snprintf(dataBuf + dataLen, maxLen - dataLen, "\'%s\', ", buf);
      tmfree(buf);
    } else if (0 == strncasecmp(stbInfo->columns[i].dataType,
                "int", 3)) {
      dataLen += snprintf(dataBuf + dataLen, maxLen - dataLen,
              "%d, ", rand_int());
    } else if (0 == strncasecmp(stbInfo->columns[i].dataType,
                "bigint", 6)) {
      dataLen += snprintf(dataBuf + dataLen, maxLen - dataLen,
              "%"PRId64", ", rand_bigint());
    }  else if (0 == strncasecmp(stbInfo->columns[i].dataType,
                "float", 5)) {
      dataLen += snprintf(dataBuf + dataLen, maxLen - dataLen,
              "%f, ", rand_float());
    }  else if (0 == strncasecmp(stbInfo->columns[i].dataType,
                "double", 6)) {
      dataLen += snprintf(dataBuf + dataLen, maxLen - dataLen,
              "%f, ", rand_double());
    }  else if (0 == strncasecmp(stbInfo->columns[i].dataType,
                "smallint", 8)) {
      dataLen += snprintf(dataBuf + dataLen, maxLen - dataLen, "%d, ", rand_smallint());
    }  else if (0 == strncasecmp(stbInfo->columns[i].dataType, "tinyint", 7)) {
      dataLen += snprintf(dataBuf + dataLen, maxLen - dataLen, "%d, ", rand_tinyint());
    }  else if (0 == strncasecmp(stbInfo->columns[i].dataType, "bool", 4)) {
      dataLen += snprintf(dataBuf + dataLen, maxLen - dataLen, "%d, ", rand_bool());
    }  else if (0 == strncasecmp(stbInfo->columns[i].dataType, "timestamp", 9)) {
      dataLen += snprintf(dataBuf + dataLen, maxLen - dataLen, "%"PRId64", ", rand_bigint());
    }  else {
      printf("No support data type: %s\n", stbInfo->columns[i].dataType);
      return (-1);
    }
  }

  dataLen -= 2;
  dataLen += snprintf(dataBuf + dataLen, maxLen - dataLen, ")");

  return dataLen;
}

int32_t generateData(char *res, char **data_type,
        int num_of_cols, int64_t timestamp, int lenOfBinary) {
  memset(res, 0, MAX_DATA_SIZE);
  char *pstr = res;
  pstr += sprintf(pstr, "(%" PRId64, timestamp);
  int c = 0;

  for (; c < MAX_NUM_DATATYPE; c++) {
    if (data_type[c] == NULL) {
      break;
    }
  }

  if (0 == c) {
    perror("data type error!");
    exit(-1);
  }

  for (int i = 0; i < num_of_cols; i++) {
    if (strcasecmp(data_type[i % c], "tinyint") == 0) {
      pstr += sprintf(pstr, ", %d", rand_tinyint() );
    } else if (strcasecmp(data_type[i % c], "smallint") == 0) {
      pstr += sprintf(pstr, ", %d", rand_smallint());
    } else if (strcasecmp(data_type[i % c], "int") == 0) {
      pstr += sprintf(pstr, ", %d", rand_int()); 
    } else if (strcasecmp(data_type[i % c], "bigint") == 0) {
      pstr += sprintf(pstr, ", %" PRId64, rand_bigint());
    } else if (strcasecmp(data_type[i % c], "float") == 0) {
      pstr += sprintf(pstr, ", %10.4f", rand_float());
    } else if (strcasecmp(data_type[i % c], "double") == 0) {
      double t = rand_double();
      pstr += sprintf(pstr, ", %20.8f", t);
    } else if (strcasecmp(data_type[i % c], "bool") == 0) {
      bool b = taosRandom() & 1;
      pstr += sprintf(pstr, ", %s", b ? "true" : "false");
    } else if (strcasecmp(data_type[i % c], "binary") == 0) {
      char *s = malloc(lenOfBinary);
      rand_string(s, lenOfBinary);
      pstr += sprintf(pstr, ", \"%s\"", s);
      free(s);
    }else if (strcasecmp(data_type[i % c], "nchar") == 0) {
      char *s = malloc(lenOfBinary);
      rand_string(s, lenOfBinary);
      pstr += sprintf(pstr, ", \"%s\"", s);
      free(s);
    }

    if (pstr - res > MAX_DATA_SIZE) {
      perror("column length too long, abort");
      exit(-1);
    }
  }

  pstr += sprintf(pstr, ")");

  return (int32_t)(pstr - res);
}

static int prepareSampleDataForSTable(SSuperTable *superTblInfo) {
  char* sampleDataBuf = NULL;

  sampleDataBuf = calloc(
            superTblInfo->lenOfOneRow * MAX_SAMPLES_ONCE_FROM_FILE, 1);
  if (sampleDataBuf == NULL) {
      fprintf(stderr, "Failed to calloc %d Bytes, reason:%s\n", 
              superTblInfo->lenOfOneRow * MAX_SAMPLES_ONCE_FROM_FILE, 
              strerror(errno));
      return -1;
  }

  superTblInfo->sampleDataBuf = sampleDataBuf;
  int ret = readSampleFromCsvFileToMem(superTblInfo);

  if (0 != ret) {
      fprintf(stderr, "read sample from csv file failed.\n");
      tmfree(sampleDataBuf);
      superTblInfo->sampleDataBuf = NULL;
      return -1;
  }

  return 0;
}

static int execInsert(threadInfo *winfo, char *buffer, int k)
{
  int affectedRows;
  SSuperTable* superTblInfo = winfo->superTblInfo;

  if (superTblInfo) {
    if (0 == strncasecmp(superTblInfo->insertMode, "taosc", strlen("taosc"))) {
      verbosePrint("%s() LN%d %s\n", __func__, __LINE__, buffer);
      affectedRows = queryDbExec(winfo->taos, buffer, INSERT_TYPE);
    } else {
      verbosePrint("%s() LN%d %s\n", __func__, __LINE__, buffer);
      int retCode = postProceSql(g_Dbs.host, g_Dbs.port, buffer);

      if (0 != retCode) {
        affectedRows = -1;
        printf("========restful return fail, threadID[%d]\n", winfo->threadID);
      } else {
        affectedRows = k;
      }
    }
  } else {
    verbosePrint("%s() LN%d %s\n", __func__, __LINE__, buffer);
    affectedRows = queryDbExec(winfo->taos, buffer, 1);
  }

  return affectedRows;
}

static void getTableName(char *pTblName, threadInfo* pThreadInfo, int tableSeq)
{
  SSuperTable* superTblInfo = pThreadInfo->superTblInfo;
  if (superTblInfo) {
    if ((superTblInfo->childTblOffset >= 0)
            && (superTblInfo->childTblLimit > 0)) {
        snprintf(pTblName, TSDB_TABLE_NAME_LEN, "%s",
            superTblInfo->childTblName + (tableSeq - superTblInfo->childTblOffset) * TSDB_TABLE_NAME_LEN);
    } else {

        verbosePrint("%s() LN%d: from=%d count=%d seq=%d\n",
                __func__, __LINE__, pThreadInfo->start_table_from,
                pThreadInfo->ntables, tableSeq);
        snprintf(pTblName, TSDB_TABLE_NAME_LEN, "%s",
            superTblInfo->childTblName + tableSeq * TSDB_TABLE_NAME_LEN);
    }
  } else {
    snprintf(pTblName, TSDB_TABLE_NAME_LEN, "%s%d",
        superTblInfo?superTblInfo->childTblPrefix:g_args.tb_prefix, tableSeq);
  }
}

static int generateDataTail(char *tableName, int32_t tableSeq,
        threadInfo* pThreadInfo,
        SSuperTable* superTblInfo,
        int batch, char* buffer, int64_t insertRows,
        int64_t startFrom, uint64_t startTime, int *pSamplePos, int *dataLen) {
  int len = 0;
  int ncols_per_record = 1; // count first col ts

  if (superTblInfo == NULL) {
    int datatypeSeq = 0;
    while(g_args.datatype[datatypeSeq]) {
        datatypeSeq ++;
        ncols_per_record ++;
    }
  }

  verbosePrint("%s() LN%d batch=%d\n", __func__, __LINE__, batch);

  int k = 0;
  for (k = 0; k < batch;) {
    if (superTblInfo) {
        int retLen = 0;

        if (0 == strncasecmp(superTblInfo->dataSource,
                    "sample", strlen("sample"))) {
          retLen = getRowDataFromSample(
                    buffer + len, 
                    superTblInfo->maxSqlLen - len, 
                    startTime + superTblInfo->timeStampStep * startFrom,
                    superTblInfo, 
                    pSamplePos);
       } else if (0 == strncasecmp(superTblInfo->dataSource,
                   "rand", strlen("rand"))) {
          int rand_num = rand_tinyint() % 100;
          if (0 != superTblInfo->disorderRatio 
                    && rand_num < superTblInfo->disorderRatio) {
            int64_t d = startTime - taosRandom() % superTblInfo->disorderRange;
            retLen = generateRowData(
                      buffer + len, 
                      superTblInfo->maxSqlLen - len,
                      d, 
                      superTblInfo);
          } else {
            retLen = generateRowData(
                      buffer + len, 
                      superTblInfo->maxSqlLen - len, 
                      startTime + superTblInfo->timeStampStep * startFrom,
                      superTblInfo);
          }
       }

       if (retLen < 0) {
         return -1;
       }

       len += retLen;

       if (len >= (superTblInfo->maxSqlLen - 256)) {    // reserve for overwrite
         k++;
         break;
       }
    } else {
      int rand_num = taosRandom() % 100;
          char data[MAX_DATA_SIZE];
          char **data_type = g_args.datatype;
          int lenOfBinary = g_args.len_of_binary;

      if ((g_args.disorderRatio != 0)
                && (rand_num < g_args.disorderRange)) {
             
        int64_t d = startTime - taosRandom() % 1000000 + rand_num;
        len = generateData(data, data_type,
                  ncols_per_record, d, lenOfBinary);
      } else {
            len = generateData(data, data_type,
                  ncols_per_record,
                  startTime + DEFAULT_TIMESTAMP_STEP * startFrom,
                  lenOfBinary);
      }

      buffer += sprintf(buffer, " %s", data);
      if (strlen(buffer) >= (g_args.max_sql_len - 256)) { // too long
          k++;
          break;
      }
    }

    verbosePrint("%s() LN%d len=%d k=%d \nbuffer=%s\n",
            __func__, __LINE__, len, k, buffer);

    k++;
    startFrom ++;

    if (startFrom >= insertRows) {
      break;
    }
  }

  *dataLen = len;
  return k;
}

static int generateSQLHead(char *tableName, int32_t tableSeq, threadInfo* pThreadInfo, SSuperTable* superTblInfo, char *buffer)
{
  int len;
  if (superTblInfo) {
    if (AUTO_CREATE_SUBTBL == superTblInfo->autoCreateTable) {
      char* tagsValBuf = NULL;
      if (0 == superTblInfo->tagSource) {
            tagsValBuf = generateTagVaulesForStb(superTblInfo);
      } else {
            tagsValBuf = getTagValueFromTagSample(
                    superTblInfo,
                    tableSeq % superTblInfo->tagSampleCount);
      }
      if (NULL == tagsValBuf) {
        fprintf(stderr, "tag buf failed to allocate  memory\n");
        return -1;
      }

      len = snprintf(buffer,
                  superTblInfo->maxSqlLen,
                  "insert into %s.%s using %s.%s tags %s values",
                  pThreadInfo->db_name,
                  tableName,
                  pThreadInfo->db_name,
                  superTblInfo->sTblName,
                  tagsValBuf);
      tmfree(tagsValBuf);
    } else if (TBL_ALREADY_EXISTS == superTblInfo->childTblExists) {
      len = snprintf(buffer,
                  superTblInfo->maxSqlLen,
                  "insert into %s.%s values",
                  pThreadInfo->db_name,
                  superTblInfo->childTblName + tableSeq * TSDB_TABLE_NAME_LEN);
    } else {
      len = snprintf(buffer,
                  (superTblInfo?superTblInfo->maxSqlLen:g_args.max_sql_len),
                  "insert into %s.%s values",
                  pThreadInfo->db_name,
                  tableName);
    }
  } else {
      len = snprintf(buffer,
                  g_args.max_sql_len,
                  "insert into %s.%s values",
                  pThreadInfo->db_name,
                  tableName);
  }

  return len;
}

static int generateDataBuffer(char *pTblName,
        int32_t tableSeq,
        threadInfo *pThreadInfo, char *buffer,
        int64_t insertRows,
        int64_t startFrom, int64_t startTime, int *pSamplePos)
{
  SSuperTable* superTblInfo = pThreadInfo->superTblInfo;

  int ncols_per_record = 1; // count first col ts

  if (superTblInfo == NULL) {
    int datatypeSeq = 0;
    while(g_args.datatype[datatypeSeq]) {
        datatypeSeq ++;
        ncols_per_record ++;
    }
  }

  assert(buffer != NULL);

  memset(buffer, 0, superTblInfo?superTblInfo->maxSqlLen:g_args.max_sql_len);

  char *pstr = buffer;

  int headLen = generateSQLHead(pTblName, tableSeq, pThreadInfo, superTblInfo, buffer);
  pstr += headLen;

  int k;
  int dataLen;
  k = generateDataTail(pTblName, tableSeq, pThreadInfo, superTblInfo,
          g_args.num_of_RPR, pstr, insertRows, startFrom, startTime,
          pSamplePos, &dataLen);
  return k;
}

static void* syncWriteInterlace(threadInfo *pThreadInfo) {
  printf("### CBD: interlace write\n");

  SSuperTable* superTblInfo = pThreadInfo->superTblInfo;

  char* buffer = calloc(superTblInfo?superTblInfo->maxSqlLen:g_args.max_sql_len, 1);
  if (NULL == buffer) {
    fprintf(stderr, "Failed to alloc %d Bytes, reason:%s\n",
              superTblInfo?superTblInfo->maxSqlLen:g_args.max_sql_len,
              strerror(errno));
    return NULL;
  }
 
  int insertMode;
  char tableName[TSDB_TABLE_NAME_LEN];

  int rowsPerTbl = superTblInfo?superTblInfo->rowsPerTbl:g_args.rows_per_tbl;

  if (rowsPerTbl > 0) {
    insertMode = INTERLACE_INSERT_MODE;
  } else {
    insertMode = PROGRESSIVE_INSERT_MODE;
  }

  // rows per table need be less than insert batch
  if (rowsPerTbl > g_args.num_of_RPR)
      rowsPerTbl = g_args.num_of_RPR;

  pThreadInfo->totalInsertRows = 0;
  pThreadInfo->totalAffectedRows = 0;

  int64_t insertRows = (superTblInfo)?superTblInfo->insertRows:g_args.num_of_DPT;
  int insert_interval = superTblInfo?superTblInfo->insertInterval:g_args.insert_interval;
  uint64_t st = 0;
  uint64_t et = 0xffffffff;

  int64_t lastPrintTime = taosGetTimestampMs();
  int64_t startTs = taosGetTimestampUs();
  int64_t endTs;

  int tableSeq = pThreadInfo->start_table_from;

  debugPrint("%s() LN%d: start_table_from=%d ntables=%d insertRows=%"PRId64"\n",
          __func__, __LINE__, pThreadInfo->start_table_from,
          pThreadInfo->ntables, insertRows);

  int64_t startTime = pThreadInfo->start_time;

  int batchPerTblTimes;
  int batchPerTbl;

  if ((rowsPerTbl > 0) && (pThreadInfo->ntables > 1)) {
    batchPerTblTimes = g_args.num_of_RPR / rowsPerTbl;
    batchPerTbl = rowsPerTbl;
  } else {
    batchPerTblTimes = 1;
    batchPerTbl = g_args.num_of_RPR;
  }

  int generatedRecPerTbl = 0;
  while(pThreadInfo->totalInsertRows < pThreadInfo->ntables * insertRows) {
    if (insert_interval) {
        st = taosGetTimestampUs();
    }
    // generate data
    memset(buffer, 0, superTblInfo?superTblInfo->maxSqlLen:g_args.max_sql_len);

    char *pstr = buffer;
    int recGenerated = 0;

    for (int i = 0; i < batchPerTblTimes; i ++) {
      getTableName(tableName, pThreadInfo, tableSeq);

      int headLen;
      if (i == 0) {
          headLen = generateSQLHead(tableName, tableSeq, pThreadInfo, superTblInfo, pstr);
      } else {
          headLen = snprintf(pstr, TSDB_TABLE_NAME_LEN, "%s.%s values", 
                  pThreadInfo->db_name,
                  tableName);
      }

      // generate data buffer
      verbosePrint("%s() LN%d i=%d buffer:\n%s\n",
                __func__, __LINE__, i, buffer);

      pstr += headLen;
      int dataLen = 0;

      printf("%s() LN%d i=%d batchPerTblTimes=%d batchPerTbl = %d\n",
                __func__, __LINE__, i, batchPerTblTimes, batchPerTbl);
      int numOfRecGenerated = generateDataTail(
                tableName, tableSeq, pThreadInfo, superTblInfo,
                batchPerTbl, pstr, insertRows, 0,
                startTime + pThreadInfo->totalInsertRows * superTblInfo->timeStampStep,
                &(pThreadInfo->samplePos), &dataLen);
      verbosePrint("%s() LN%d numOfRecGenerated= %d\n",
                __func__, __LINE__, numOfRecGenerated);
      pstr += dataLen;
      recGenerated += numOfRecGenerated;

      tableSeq ++;
      if (insertMode == INTERLACE_INSERT_MODE) {
          if (tableSeq == pThreadInfo->start_table_from + pThreadInfo->ntables) {
            // turn to first table
            tableSeq = pThreadInfo->start_table_from;
            generatedRecPerTbl += numOfRecGenerated;
          }
      }

      int remainRows = insertRows - generatedRecPerTbl;
      if (batchPerTbl > remainRows)
        batchPerTbl = remainRows;

      if ((g_args.num_of_RPR - recGenerated) < batchPerTbl)
        break;
    }
    pThreadInfo->totalInsertRows += recGenerated;
    printf("%s() LN%d recGenerated=%d totalInsertRows=%"PRId64" buffer:\n%s\n",
              __func__, __LINE__, recGenerated, 
              pThreadInfo->totalInsertRows, buffer);

    int affectedRows = execInsert(pThreadInfo, buffer, recGenerated);
    if (affectedRows < 0)
        goto free_and_statistics_interlace;

    pThreadInfo->totalAffectedRows += affectedRows;

    endTs = taosGetTimestampUs();
    int64_t delay = endTs - startTs;
    if (delay > pThreadInfo->maxDelay) pThreadInfo->maxDelay = delay;
    if (delay < pThreadInfo->minDelay) pThreadInfo->minDelay = delay;
    pThreadInfo->cntDelay++;
    pThreadInfo->totalDelay += delay;

    int64_t  currentPrintTime = taosGetTimestampMs();
    if (currentPrintTime - lastPrintTime > 30*1000) {
      printf("thread[%d] has currently inserted rows: %"PRId64 ", affected rows: %"PRId64 "\n",
                    pThreadInfo->threadID,
                    pThreadInfo->totalInsertRows,
                    pThreadInfo->totalAffectedRows);
      lastPrintTime = currentPrintTime;
    }

    if (insert_interval) {
        et = taosGetTimestampUs();

        if (insert_interval > ((et - st)/1000) ) {
            int sleep_time = insert_interval - (et -st)/1000;
            verbosePrint("%s() LN%d sleep: %d ms for insert interval\n",
                    __func__, __LINE__, sleep_time);
            taosMsleep(sleep_time); // ms
        }
    }
  }

free_and_statistics_interlace:
  tmfree(buffer);

  printf("====thread[%d] completed total inserted rows: %"PRId64 ", total affected rows: %"PRId64 "====\n", 
          pThreadInfo->threadID, 
          pThreadInfo->totalInsertRows, 
          pThreadInfo->totalAffectedRows);
  return NULL;
}

// sync insertion
/*
   1 thread: 100 tables * 2000  rows/s
   1 thread: 10  tables * 20000 rows/s
   6 thread: 300 tables * 2000  rows/s

   2 taosinsertdata , 1 thread:  10  tables * 20000 rows/s
*/
static void* syncWriteProgressive(threadInfo *pThreadInfo) {

  SSuperTable* superTblInfo = pThreadInfo->superTblInfo;

  char* buffer = calloc(superTblInfo?superTblInfo->maxSqlLen:g_args.max_sql_len, 1);
  if (NULL == buffer) {
    fprintf(stderr, "Failed to alloc %d Bytes, reason:%s\n",
              superTblInfo?superTblInfo->maxSqlLen:g_args.max_sql_len,
              strerror(errno));
    return NULL;
  }
 
  int64_t lastPrintTime = taosGetTimestampMs();
  int64_t startTs = taosGetTimestampUs();
  int64_t endTs;

  int insert_interval = superTblInfo?superTblInfo->insertInterval:g_args.insert_interval;
  uint64_t st = 0;
  uint64_t et = 0xffffffff;

  pThreadInfo->totalInsertRows = 0;
  pThreadInfo->totalAffectedRows = 0;

  pThreadInfo->samplePos = 0;

  for (uint32_t tableSeq = pThreadInfo->start_table_from; tableSeq <= pThreadInfo->end_table_to;
        tableSeq ++) {
    int64_t start_time = pThreadInfo->start_time;

    int64_t insertRows = (superTblInfo)?superTblInfo->insertRows:g_args.num_of_DPT;
    verbosePrint("%s() LN%d insertRows=%"PRId64"\n", __func__, __LINE__, insertRows);

    for (int64_t i = 0; i < insertRows;) {
      if (insert_interval) {
            st = taosGetTimestampUs();
      }

      char tableName[TSDB_TABLE_NAME_LEN];
      getTableName(tableName, pThreadInfo, tableSeq);
      verbosePrint("%s() LN%d: tid=%d seq=%d tableName=%s\n",
             __func__, __LINE__,
             pThreadInfo->threadID, tableSeq, tableName);

      int generated = generateDataBuffer(tableName, tableSeq, pThreadInfo, buffer, insertRows,
            i, start_time, &(pThreadInfo->samplePos));
      if (generated > 0)
        i += generated;
      else
        goto free_and_statistics_2;

      int affectedRows = execInsert(pThreadInfo, buffer, generated);
      if (affectedRows < 0)
        goto free_and_statistics_2;

      pThreadInfo->totalInsertRows += generated;
      pThreadInfo->totalAffectedRows += affectedRows;

      endTs = taosGetTimestampUs();
      int64_t delay = endTs - startTs;
      if (delay > pThreadInfo->maxDelay) pThreadInfo->maxDelay = delay;
      if (delay < pThreadInfo->minDelay) pThreadInfo->minDelay = delay;
      pThreadInfo->cntDelay++;
      pThreadInfo->totalDelay += delay;

      int64_t  currentPrintTime = taosGetTimestampMs();
      if (currentPrintTime - lastPrintTime > 30*1000) {
        printf("thread[%d] has currently inserted rows: %"PRId64 ", affected rows: %"PRId64 "\n",
                    pThreadInfo->threadID,
                    pThreadInfo->totalInsertRows,
                    pThreadInfo->totalAffectedRows);
        lastPrintTime = currentPrintTime;
      }

      if (i >= insertRows)
        break;

      if (insert_interval) {
        et = taosGetTimestampUs();

        if (insert_interval > ((et - st)/1000) ) {
            int sleep_time = insert_interval - (et -st)/1000;
            verbosePrint("%s() LN%d sleep: %d ms for insert interval\n", __func__, __LINE__, sleep_time);
            taosMsleep(sleep_time); // ms
        }
      }
    }   // num_of_DPT

    if ((tableSeq == pThreadInfo->ntables - 1) && superTblInfo &&
        (0 == strncasecmp(
                    superTblInfo->dataSource, "sample", strlen("sample")))) {
          printf("%s() LN%d samplePos=%d\n",
                  __func__, __LINE__, pThreadInfo->samplePos);
    }
  } // tableSeq

free_and_statistics_2:
  tmfree(buffer);

  printf("====thread[%d] completed total inserted rows: %"PRId64 ", total affected rows: %"PRId64 "====\n", 
          pThreadInfo->threadID, 
          pThreadInfo->totalInsertRows, 
          pThreadInfo->totalAffectedRows);
  return NULL;
}

static void* syncWrite(void *sarg) {

  threadInfo *winfo = (threadInfo *)sarg; 
  SSuperTable* superTblInfo = winfo->superTblInfo;

  int rowsPerTbl = superTblInfo?superTblInfo->rowsPerTbl:g_args.rows_per_tbl;

  if (rowsPerTbl > 0) {
    // interlace mode
    return syncWriteInterlace(winfo);
  } else {
    // progressive mode
    return syncWriteProgressive(winfo);
  }
}

void callBack(void *param, TAOS_RES *res, int code) {
  threadInfo* winfo = (threadInfo*)param; 
  SSuperTable* superTblInfo = winfo->superTblInfo;

  int insert_interval = superTblInfo?superTblInfo->insertInterval:g_args.insert_interval;
  if (insert_interval) {
    winfo->et = taosGetTimestampUs();
    if (((winfo->et - winfo->st)/1000) < insert_interval) {
      taosMsleep(insert_interval - (winfo->et - winfo->st)/1000); // ms
    }
  }
  
  char *buffer = calloc(1, winfo->superTblInfo->maxSqlLen);
  char *data   = calloc(1, MAX_DATA_SIZE);
  char *pstr = buffer;
  pstr += sprintf(pstr, "insert into %s.%s%d values", winfo->db_name, winfo->tb_prefix,
          winfo->start_table_from);
//  if (winfo->counter >= winfo->superTblInfo->insertRows) {
  if (winfo->counter >= g_args.num_of_RPR) {
    winfo->start_table_from++;
    winfo->counter = 0;
  }
  if (winfo->start_table_from > winfo->end_table_to) {
    tsem_post(&winfo->lock_sem);
    free(buffer);
    free(data);
    taos_free_result(res);
    return;
  }
  
  for (int i = 0; i < g_args.num_of_RPR; i++) {
    int rand_num = taosRandom() % 100;
    if (0 != winfo->superTblInfo->disorderRatio && rand_num < winfo->superTblInfo->disorderRatio)
    {
      int64_t d = winfo->lastTs - taosRandom() % 1000000 + rand_num;
      //generateData(data, datatype, ncols_per_record, d, len_of_binary);
      (void)generateRowData(data, MAX_DATA_SIZE, d, winfo->superTblInfo);
    } else {
      //generateData(data, datatype, ncols_per_record, start_time += 1000, len_of_binary);
      (void)generateRowData(data, MAX_DATA_SIZE, winfo->lastTs += 1000, winfo->superTblInfo);
    }
    pstr += sprintf(pstr, "%s", data);
    winfo->counter++;

    if (winfo->counter >= winfo->superTblInfo->insertRows) {
      break;
    }
  }

  if (insert_interval) {
    winfo->st = taosGetTimestampUs();
  }
  taos_query_a(winfo->taos, buffer, callBack, winfo);
  free(buffer);
  free(data);

  taos_free_result(res);
}

void *asyncWrite(void *sarg) {
  threadInfo *winfo = (threadInfo *)sarg;
  SSuperTable* superTblInfo = winfo->superTblInfo;

  winfo->st = 0;
  winfo->et = 0;
  winfo->lastTs = winfo->start_time;
  
  int insert_interval = superTblInfo?superTblInfo->insertInterval:g_args.insert_interval;
  if (insert_interval) {
    winfo->st = taosGetTimestampUs();
  }
  taos_query_a(winfo->taos, "show databases", callBack, winfo);

  tsem_wait(&(winfo->lock_sem));

  return NULL;
}

static void startMultiThreadInsertData(int threads, char* db_name,
        char* precision,SSuperTable* superTblInfo) {

    pthread_t *pids = malloc(threads * sizeof(pthread_t));
    assert(pids != NULL);

    threadInfo *infos = malloc(threads * sizeof(threadInfo));
    assert(infos != NULL);

    memset(pids, 0, threads * sizeof(pthread_t));
    memset(infos, 0, threads * sizeof(threadInfo));

    int ntables = 0;
    if (superTblInfo) {

        if ((superTblInfo->childTblOffset >= 0) 
            && (superTblInfo->childTblLimit > 0)) {

            ntables = superTblInfo->childTblLimit;
        } else {
            ntables = superTblInfo->childTblCount;
        }
    } else {
        ntables = g_args.num_of_tables;
    }

    int a = ntables / threads;
    if (a < 1) {
        threads = ntables;
        a = 1;
    }

    int b = 0;
    if (threads != 0) {
        b = ntables % threads;
    }

  //TAOS* taos;
  //if (0 == strncasecmp(superTblInfo->insertMode, "taosc", 5)) {
  //  taos = taos_connect(g_Dbs.host, g_Dbs.user, g_Dbs.password, db_name, g_Dbs.port);
  //  if (NULL == taos) {
  //    printf("connect to server fail, reason: %s\n", taos_errstr(NULL));
  //    exit(-1);
  //  }
  //}

  int32_t timePrec = TSDB_TIME_PRECISION_MILLI;
  if (0 != precision[0]) {
    if (0 == strncasecmp(precision, "ms", 2)) {
      timePrec = TSDB_TIME_PRECISION_MILLI;
    }  else if (0 == strncasecmp(precision, "us", 2)) {
      timePrec = TSDB_TIME_PRECISION_MICRO;
    }  else {
      fprintf(stderr, "No support precision: %s\n", precision);
      exit(-1);
    }
  }

  int64_t start_time; 
  if (superTblInfo) {
    if (0 == strncasecmp(superTblInfo->startTimestamp, "now", 3)) {
        start_time = taosGetTimestamp(timePrec);
    } else {
        if (TSDB_CODE_SUCCESS != taosParseTime(
            superTblInfo->startTimestamp,
            &start_time,
            strlen(superTblInfo->startTimestamp),
            timePrec, 0)) {
            fprintf(stderr, "ERROR to parse time!\n");
            exit(-1);
        }
    }
  } else {
     start_time = 1500000000000;
  }

  double start = getCurrentTime();
 
  int startFrom;

  if ((superTblInfo) && (superTblInfo->childTblOffset >= 0))
      startFrom = superTblInfo->childTblOffset;
  else
      startFrom = 0;

  // read sample data from file first
  if ((superTblInfo) && (0 == strncasecmp(superTblInfo->dataSource, 
              "sample", strlen("sample")))) {
    if (0 != prepareSampleDataForSTable(superTblInfo)) {
      fprintf(stderr, "prepare sample data for stable failed!\n");
      exit(-1);
    }
  }

  if (superTblInfo && (superTblInfo->childTblOffset >= 0)
            && (superTblInfo->childTblLimit > 0)) {

    TAOS* taos = taos_connect(
              g_Dbs.host, g_Dbs.user,
              g_Dbs.password, db_name, g_Dbs.port);
    if (NULL == taos) {
        fprintf(stderr, "connect to server fail , reason: %s\n",
                taos_errstr(NULL));
        exit(-1);
    }

    superTblInfo->childTblName = (char*)calloc(1,
        superTblInfo->childTblLimit * TSDB_TABLE_NAME_LEN);
    if (superTblInfo->childTblName == NULL) {
      fprintf(stderr, "alloc memory failed!");
      taos_close(taos);
      exit(-1);
    }
    int childTblCount;

    getChildNameOfSuperTableWithLimitAndOffset(
        taos,
        db_name, superTblInfo->sTblName,
        &superTblInfo->childTblName, &childTblCount,
        superTblInfo->childTblLimit,
        superTblInfo->childTblOffset);
    taos_close(taos);
  }

  // read sample data from file first
  if ((superTblInfo) && (0 == strncasecmp(superTblInfo->dataSource, 
              "sample", strlen("sample")))) {
    if (0 != prepareSampleDataForSTable(superTblInfo)) {
      fprintf(stderr, "prepare sample data for stable failed!\n");
      exit(-1);
    }
  }


  TAOS* taos = taos_connect(
              g_Dbs.host, g_Dbs.user,
              g_Dbs.password, db_name, g_Dbs.port);
  if (NULL == taos) {
    fprintf(stderr, "connect to server fail , reason: %s\n",
                taos_errstr(NULL));
    exit(-1);
  }

  if (superTblInfo) {

    int limit, offset;
    if (superTblInfo && (superTblInfo->childTblOffset >= 0)
            && (superTblInfo->childTblLimit > 0)) {
        limit = superTblInfo->childTblLimit;
        offset = superTblInfo->childTblOffset;
    } else {
        limit = superTblInfo->childTblCount;
        offset = 0;
    }

    superTblInfo->childTblName = (char*)calloc(1,
        limit * TSDB_TABLE_NAME_LEN);
    if (superTblInfo->childTblName == NULL) {
      fprintf(stderr, "alloc memory failed!");
      taos_close(taos);
      exit(-1);
    }

    int childTblCount;
    getChildNameOfSuperTableWithLimitAndOffset(
        taos,
        db_name, superTblInfo->sTblName,
        &superTblInfo->childTblName, &childTblCount,
        limit,
        offset);
  }
  taos_close(taos);

  for (int i = 0; i < threads; i++) {
    threadInfo *t_info = infos + i;
    t_info->threadID = i;
    tstrncpy(t_info->db_name, db_name, MAX_DB_NAME_SIZE);
    t_info->superTblInfo = superTblInfo;

    t_info->start_time = start_time;
    t_info->minDelay = INT16_MAX;

    if ((NULL == superTblInfo) ||
            (0 == strncasecmp(superTblInfo->insertMode, "taosc", 5))) {
      //t_info->taos = taos;
      t_info->taos = taos_connect(
              g_Dbs.host, g_Dbs.user,
              g_Dbs.password, db_name, g_Dbs.port);
      if (NULL == t_info->taos) {
        fprintf(stderr, "connect to server fail from insert sub thread, reason: %s\n",
                taos_errstr(NULL));
        exit(-1);
      }
    } else {
      t_info->taos = NULL;
    }

    if ((NULL == superTblInfo)
            || (0 == superTblInfo->multiThreadWriteOneTbl)) {
      t_info->start_table_from = startFrom;
      t_info->ntables = i<b?a+1:a;
      t_info->end_table_to = i < b ? startFrom + a : startFrom + a - 1;
      startFrom = t_info->end_table_to + 1;
    } else {
      t_info->start_table_from = 0;
      t_info->ntables = superTblInfo->childTblCount;
      t_info->start_time = t_info->start_time + rand_int() % 10000 - rand_tinyint();
    }

    tsem_init(&(t_info->lock_sem), 0, 0);
    if (SYNC == g_Dbs.queryMode) {
      pthread_create(pids + i, NULL, syncWrite, t_info);
    } else {
      pthread_create(pids + i, NULL, asyncWrite, t_info);
    }
  }

  for (int i = 0; i < threads; i++) {
    pthread_join(pids[i], NULL);
  }

  int64_t totalDelay = 0;
  int64_t maxDelay = 0;
  int64_t minDelay = INT16_MAX;
  int64_t cntDelay = 1;
  double  avgDelay = 0;

  for (int i = 0; i < threads; i++) {
    threadInfo *t_info = infos + i;

    tsem_destroy(&(t_info->lock_sem));
    taos_close(t_info->taos);

    if (superTblInfo) {
        superTblInfo->totalAffectedRows += t_info->totalAffectedRows;
        superTblInfo->totalInsertRows += t_info->totalInsertRows;
    } else {
        g_args.totalAffectedRows += t_info->totalAffectedRows;
        g_args.totalInsertRows += t_info->totalInsertRows;
    }

    totalDelay  += t_info->totalDelay;
    cntDelay   += t_info->cntDelay;
    if (t_info->maxDelay > maxDelay) maxDelay = t_info->maxDelay;
    if (t_info->minDelay < minDelay) minDelay = t_info->minDelay;
  }
  cntDelay -= 1;

  if (cntDelay == 0)    cntDelay = 1;
  avgDelay = (double)totalDelay / cntDelay;

  double end = getCurrentTime();
  double t = end - start;

  if (superTblInfo) {
    printf("Spent %.4f seconds to insert rows: %"PRId64", affected rows: %"PRId64" with %d thread(s) into %s.%s. %2.f records/second\n\n",
          t, superTblInfo->totalInsertRows,
          superTblInfo->totalAffectedRows,
          threads, db_name, superTblInfo->sTblName,
          superTblInfo->totalInsertRows / t);
    fprintf(g_fpOfInsertResult,
          "Spent %.4f seconds to insert rows: %"PRId64", affected rows: %"PRId64" with %d thread(s) into %s.%s. %2.f records/second\n\n",
          t, superTblInfo->totalInsertRows,
          superTblInfo->totalAffectedRows,
          threads, db_name, superTblInfo->sTblName,
          superTblInfo->totalInsertRows/ t);
  } else {
    printf("Spent %.4f seconds to insert rows: %"PRId64", affected rows: %"PRId64" with %d thread(s) into %s %2.f records/second\n\n",
          t, g_args.totalInsertRows,
          g_args.totalAffectedRows,
          threads, db_name,
          g_args.totalInsertRows / t);
    fprintf(g_fpOfInsertResult,
          "Spent %.4f seconds to insert rows: %"PRId64", affected rows: %"PRId64" with %d thread(s) into %s %2.f records/second\n\n",
          t, g_args.totalInsertRows,
          g_args.totalAffectedRows,
          threads, db_name,
          g_args.totalInsertRows / t);
  }

  printf("insert delay, avg: %10.6fms, max: %10.6fms, min: %10.6fms\n\n",
          avgDelay/1000.0, (double)maxDelay/1000.0, (double)minDelay/1000.0);
  fprintf(g_fpOfInsertResult, "insert delay, avg:%10.6fms, max: %10.6fms, min: %10.6fms\n\n",
          avgDelay/1000.0, (double)maxDelay/1000.0, (double)minDelay/1000.0);
  
  //taos_close(taos);

  free(pids);
  free(infos);
}

void *readTable(void *sarg) {
#if 1  
  threadInfo *rinfo = (threadInfo *)sarg;
  TAOS *taos = rinfo->taos;
  char command[BUFFER_SIZE] = "\0";
  uint64_t sTime = rinfo->start_time;
  char *tb_prefix = rinfo->tb_prefix;
  FILE *fp = fopen(rinfo->fp, "a");
  if (NULL == fp) {
    fprintf(stderr, "fopen %s fail, reason:%s.\n", rinfo->fp, strerror(errno));
    return NULL;
  }

    int num_of_DPT;
/*  if (rinfo->superTblInfo) {
    num_of_DPT = rinfo->superTblInfo->insertRows; //  nrecords_per_table;
  } else {
  */
      num_of_DPT = g_args.num_of_DPT;
//  }

  int num_of_tables = rinfo->ntables; // rinfo->end_table_to - rinfo->start_table_from + 1;
  int totalData = num_of_DPT * num_of_tables;
  bool do_aggreFunc = g_Dbs.do_aggreFunc;

  int n = do_aggreFunc ? (sizeof(aggreFunc) / sizeof(aggreFunc[0])) : 2;
  if (!do_aggreFunc) {
    printf("\nThe first field is either Binary or Bool. Aggregation functions are not supported.\n");
  }
  printf("%d records:\n", totalData);
  fprintf(fp, "| QFunctions |    QRecords    |   QSpeed(R/s)   |  QLatency(ms) |\n");

  for (int j = 0; j < n; j++) {
    double totalT = 0;
    int count = 0;
    for (int i = 0; i < num_of_tables; i++) {
      sprintf(command, "select %s from %s%d where ts>= %" PRId64, aggreFunc[j], tb_prefix, i, sTime);

      double t = getCurrentTime();
      TAOS_RES *pSql = taos_query(taos, command);
      int32_t code = taos_errno(pSql);

      if (code != 0) {
        fprintf(stderr, "Failed to query:%s\n", taos_errstr(pSql));
        taos_free_result(pSql);
        taos_close(taos);
        fclose(fp);
        return NULL;
      }

      while (taos_fetch_row(pSql) != NULL) {
        count++;
      }

      t = getCurrentTime() - t;
      totalT += t;

      taos_free_result(pSql);
    }

    fprintf(fp, "|%10s  |   %10d   |  %12.2f   |   %10.2f  |\n",
            aggreFunc[j][0] == '*' ? "   *   " : aggreFunc[j], totalData,
            (double)(num_of_tables * num_of_DPT) / totalT, totalT * 1000);
    printf("select %10s took %.6f second(s)\n", aggreFunc[j], totalT);
  }
  fprintf(fp, "\n");
  fclose(fp);
#endif
  return NULL;
}

void *readMetric(void *sarg) {
#if 1  
  threadInfo *rinfo = (threadInfo *)sarg;
  TAOS *taos = rinfo->taos;
  char command[BUFFER_SIZE] = "\0";
  FILE *fp = fopen(rinfo->fp, "a");
  if (NULL == fp) {
    printf("fopen %s fail, reason:%s.\n", rinfo->fp, strerror(errno));
    return NULL;
  }

  int num_of_DPT = rinfo->superTblInfo->insertRows;
  int num_of_tables = rinfo->ntables; // rinfo->end_table_to - rinfo->start_table_from + 1;
  int totalData = num_of_DPT * num_of_tables;
  bool do_aggreFunc = g_Dbs.do_aggreFunc;

  int n = do_aggreFunc ? (sizeof(aggreFunc) / sizeof(aggreFunc[0])) : 2;
  if (!do_aggreFunc) {
    printf("\nThe first field is either Binary or Bool. Aggregation functions are not supported.\n");
  }
  printf("%d records:\n", totalData);
  fprintf(fp, "Querying On %d records:\n", totalData);

  for (int j = 0; j < n; j++) {
    char condition[BUFFER_SIZE - 30] = "\0";
    char tempS[64] = "\0";

    int m = 10 < num_of_tables ? 10 : num_of_tables;

    for (int i = 1; i <= m; i++) {
      if (i == 1) {
        sprintf(tempS, "t1 = %d", i);
      } else {
        sprintf(tempS, " or t1 = %d ", i);
      }
      strcat(condition, tempS);

      sprintf(command, "select %s from meters where %s", aggreFunc[j], condition);

      printf("Where condition: %s\n", condition);
      fprintf(fp, "%s\n", command);

      double t = getCurrentTime();

      TAOS_RES *pSql = taos_query(taos, command);
      int32_t code = taos_errno(pSql);

      if (code != 0) {
        fprintf(stderr, "Failed to query:%s\n", taos_errstr(pSql));
        taos_free_result(pSql);
        taos_close(taos);
        fclose(fp);
        return NULL;
      }
      int count = 0;
      while (taos_fetch_row(pSql) != NULL) {
        count++;
      }
      t = getCurrentTime() - t;

      fprintf(fp, "| Speed: %12.2f(per s) | Latency: %.4f(ms) |\n",
              num_of_tables * num_of_DPT / t, t * 1000);
      printf("select %10s took %.6f second(s)\n\n", aggreFunc[j], t);

      taos_free_result(pSql);
    }
    fprintf(fp, "\n");
  }
  fclose(fp);
#endif
  return NULL;
}


static int insertTestProcess() {

  setupForAnsiEscape();
  int ret = printfInsertMeta();
  resetAfterAnsiEscape();

  if (ret == -1)
    exit(EXIT_FAILURE);

  debugPrint("%d result file: %s\n", __LINE__, g_Dbs.resultFile);
  g_fpOfInsertResult = fopen(g_Dbs.resultFile, "a");
  if (NULL == g_fpOfInsertResult) {
    fprintf(stderr, "Failed to open %s for save result\n", g_Dbs.resultFile);
    return -1;
  }

  printfInsertMetaToFile(g_fpOfInsertResult);

  if (!g_args.answer_yes) {
    printf("Press enter key to continue\n\n");
    (void)getchar();
  }
 
  init_rand_data();

  // create database and super tables
  if(createDatabases() != 0) {
    fclose(g_fpOfInsertResult);
    return -1;
  }

  // pretreatement
  prepareSampleData();

  double start;
  double end;

  // create child tables
  start = getCurrentTime();
  createChildTables();
  end = getCurrentTime();

  if (g_totalChildTables > 0) {
    printf("Spent %.4f seconds to create %d tables with %d thread(s)\n\n",
            end - start, g_totalChildTables, g_Dbs.threadCount);
    fprintf(g_fpOfInsertResult,
            "Spent %.4f seconds to create %d tables with %d thread(s)\n\n",
            end - start, g_totalChildTables, g_Dbs.threadCount);
  }

  taosMsleep(1000);
  // create sub threads for inserting data
  //start = getCurrentTime();
  for (int i = 0; i < g_Dbs.dbCount; i++) {
    if (g_Dbs.db[i].superTblCount > 0) {
      for (int j = 0; j < g_Dbs.db[i].superTblCount; j++) {
        SSuperTable* superTblInfo = &g_Dbs.db[i].superTbls[j];
        if (0 == g_Dbs.db[i].superTbls[j].insertRows) {
          continue;
        }
        startMultiThreadInsertData(
          g_Dbs.threadCount, 
          g_Dbs.db[i].dbName, 
          g_Dbs.db[i].dbCfg.precision, 
          superTblInfo);
        }
    } else {
        startMultiThreadInsertData(
          g_Dbs.threadCount, 
          g_Dbs.db[i].dbName, 
          g_Dbs.db[i].dbCfg.precision, 
          NULL);
    }
  }
  //end = getCurrentTime();

  //int64_t    totalInsertRows = 0;
  //int64_t    totalAffectedRows = 0;
  //for (int i = 0; i < g_Dbs.dbCount; i++) {    
  //  for (int j = 0; j < g_Dbs.db[i].superTblCount; j++) {
  //  totalInsertRows+= g_Dbs.db[i].superTbls[j].totalInsertRows;
  //  totalAffectedRows += g_Dbs.db[i].superTbls[j].totalAffectedRows;
  //}
  //printf("Spent %.4f seconds to insert rows: %"PRId64", affected rows: %"PRId64" with %d thread(s)\n\n", end - start, totalInsertRows, totalAffectedRows, g_Dbs.threadCount);
  postFreeResource();

  return 0;
}

void *superQueryProcess(void *sarg) {
  threadInfo *winfo = (threadInfo *)sarg; 

  //char sqlStr[MAX_TB_NAME_SIZE*2];
  //sprintf(sqlStr, "use %s", g_queryInfo.dbName);
  //queryDB(winfo->taos, sqlStr);
  
  int64_t st = 0;
  int64_t et = 0;
  while (1) {
    if (g_queryInfo.superQueryInfo.rate && (et - st) < (int64_t)g_queryInfo.superQueryInfo.rate*1000) {
      taosMsleep(g_queryInfo.superQueryInfo.rate*1000 - (et - st)); // ms
      //printf("========sleep duration:%"PRId64 "========inserted rows:%d, table range:%d - %d\n", (1000 - (et - st)), i, winfo->start_table_from, winfo->end_table_to);
    }

    st = taosGetTimestampUs();
    for (int i = 0; i < g_queryInfo.superQueryInfo.sqlCount; i++) {
      if (0 == strncasecmp(g_queryInfo.queryMode, "taosc", 5)) {          
        int64_t t1 = taosGetTimestampUs();
        char tmpFile[MAX_FILE_NAME_LEN*2] = {0};
        if (g_queryInfo.superQueryInfo.result[i][0] != 0) {
          sprintf(tmpFile, "%s-%d", g_queryInfo.superQueryInfo.result[i], winfo->threadID);
        }
        selectAndGetResult(winfo->taos, g_queryInfo.superQueryInfo.sql[i], tmpFile); 
        int64_t t2 = taosGetTimestampUs();          
        printf("=[taosc] thread[%"PRId64"] complete one sql, Spent %f s\n", 
                taosGetSelfPthreadId(), (t2 - t1)/1000000.0);
      } else {
        int64_t t1 = taosGetTimestampUs();
        int retCode = postProceSql(g_queryInfo.host, 
                g_queryInfo.port, g_queryInfo.superQueryInfo.sql[i]);
        int64_t t2 = taosGetTimestampUs();          
        printf("=[restful] thread[%"PRId64"] complete one sql, Spent %f s\n", 
                taosGetSelfPthreadId(), (t2 - t1)/1000000.0);
        
        if (0 != retCode) {
          printf("====restful return fail, threadID[%d]\n", winfo->threadID);
          return NULL;
        }
      }   
    }
    et = taosGetTimestampUs();
    printf("==thread[%"PRId64"] complete all sqls to specify tables once queries duration:%.6fs\n\n", 
            taosGetSelfPthreadId(), (double)(et - st)/1000.0);
  }
  return NULL;
}

static void replaceSubTblName(char* inSql, char* outSql, int tblIndex) {
  char sourceString[32] = "xxxx";
  char subTblName[MAX_TB_NAME_SIZE*3];
  sprintf(subTblName, "%s.%s", 
          g_queryInfo.dbName, 
          g_queryInfo.subQueryInfo.childTblName + tblIndex*TSDB_TABLE_NAME_LEN);

  //printf("inSql: %s\n", inSql);
  
  char* pos = strstr(inSql, sourceString);
  if (0 == pos) {
    return; 
  }
  
  tstrncpy(outSql, inSql, pos - inSql + 1);
  //printf("1: %s\n", outSql);
  strcat(outSql, subTblName);  
  //printf("2: %s\n", outSql);  
  strcat(outSql, pos+strlen(sourceString));  
  //printf("3: %s\n", outSql); 
}

static void *subQueryProcess(void *sarg) {
  char sqlstr[1024];
  threadInfo *winfo = (threadInfo *)sarg; 
  int64_t st = 0;
  int64_t et = (int64_t)g_queryInfo.subQueryInfo.rate*1000;
  while (1) {
    if (g_queryInfo.subQueryInfo.rate
            && (et - st) < (int64_t)g_queryInfo.subQueryInfo.rate*1000) {
      taosMsleep(g_queryInfo.subQueryInfo.rate*1000 - (et - st)); // ms
      //printf("========sleep duration:%"PRId64 "========inserted rows:%d, table range:%d - %d\n", (1000 - (et - st)), i, winfo->start_table_from, winfo->end_table_to);
    }

    st = taosGetTimestampUs();
    for (int i = winfo->start_table_from; i <= winfo->end_table_to; i++) {
      for (int j = 0; j < g_queryInfo.subQueryInfo.sqlCount; j++) {
        memset(sqlstr,0,sizeof(sqlstr));
        replaceSubTblName(g_queryInfo.subQueryInfo.sql[j], sqlstr, i);
        char tmpFile[MAX_FILE_NAME_LEN*2] = {0};
        if (g_queryInfo.subQueryInfo.result[i][0] != 0) {
          sprintf(tmpFile, "%s-%d", 
                  g_queryInfo.subQueryInfo.result[i], 
                  winfo->threadID);
        }
        selectAndGetResult(winfo->taos, sqlstr, tmpFile); 
      }
    }
    et = taosGetTimestampUs();
    printf("####thread[%"PRId64"] complete all sqls to allocate all sub-tables[%d - %d] once queries duration:%.4fs\n\n", 
            taosGetSelfPthreadId(), 
            winfo->start_table_from, 
            winfo->end_table_to, 
            (double)(et - st)/1000000.0);
  }
  return NULL;
}

static int queryTestProcess() {
  TAOS * taos = NULL;  
  taos = taos_connect(g_queryInfo.host, 
          g_queryInfo.user, 
          g_queryInfo.password, 
          NULL, 
          g_queryInfo.port);
  if (taos == NULL) {
    fprintf(stderr, "Failed to connect to TDengine, reason:%s\n", taos_errstr(NULL));
    exit(-1);
  }

  if (0 != g_queryInfo.subQueryInfo.sqlCount) {
    getAllChildNameOfSuperTable(taos,
            g_queryInfo.dbName,
            g_queryInfo.subQueryInfo.sTblName,
            &g_queryInfo.subQueryInfo.childTblName,
            &g_queryInfo.subQueryInfo.childTblCount);
  }  
  
  printfQueryMeta();
  
  if (!g_args.answer_yes) {
    printf("Press enter key to continue\n\n");
    (void)getchar();
  }
  
  printfQuerySystemInfo(taos);
  
  pthread_t  *pids  = NULL;
  threadInfo *infos = NULL;
  //==== create sub threads for query from specify table
  if (g_queryInfo.superQueryInfo.sqlCount > 0
          && g_queryInfo.superQueryInfo.concurrent > 0) {

    pids  = malloc(g_queryInfo.superQueryInfo.concurrent * sizeof(pthread_t));
    infos = malloc(g_queryInfo.superQueryInfo.concurrent * sizeof(threadInfo));
    if ((NULL == pids) || (NULL == infos)) {
      printf("malloc failed for create threads\n");
      taos_close(taos);
      exit(-1);
    }

    for (int i = 0; i < g_queryInfo.superQueryInfo.concurrent; i++) {
      threadInfo *t_info = infos + i;
      t_info->threadID = i;
  
      if (0 == strncasecmp(g_queryInfo.queryMode, "taosc", 5)) {
        t_info->taos = taos;

        char sqlStr[MAX_TB_NAME_SIZE*2];
        sprintf(sqlStr, "use %s", g_queryInfo.dbName);
        verbosePrint("%s() %d sqlStr: %s\n", __func__, __LINE__, sqlStr);
        (void)queryDbExec(t_info->taos, sqlStr, NO_INSERT_TYPE);
      } else {
        t_info->taos = NULL;
      }
  
      pthread_create(pids + i, NULL, superQueryProcess, t_info);
    }
  }else {
    g_queryInfo.superQueryInfo.concurrent = 0;
  }

  pthread_t  *pidsOfSub  = NULL;
  threadInfo *infosOfSub = NULL;
  //==== create sub threads for query from all sub table of the super table
  if ((g_queryInfo.subQueryInfo.sqlCount > 0)
          && (g_queryInfo.subQueryInfo.threadCnt > 0)) {
    pidsOfSub  = malloc(g_queryInfo.subQueryInfo.threadCnt * sizeof(pthread_t));
    infosOfSub = malloc(g_queryInfo.subQueryInfo.threadCnt * sizeof(threadInfo));
    if ((NULL == pidsOfSub) || (NULL == infosOfSub)) {
      printf("malloc failed for create threads\n");
      taos_close(taos);
      exit(-1);
    }

    int ntables = g_queryInfo.subQueryInfo.childTblCount;
    int threads = g_queryInfo.subQueryInfo.threadCnt;
  
    int a = ntables / threads;
    if (a < 1) {
      threads = ntables;
      a = 1;
    }
 
    int b = 0;
    if (threads != 0) {
      b = ntables % threads;
    }

    int startFrom = 0;
    for (int i = 0; i < threads; i++) {  
      threadInfo *t_info = infosOfSub + i;
      t_info->threadID = i;
      
      t_info->start_table_from = startFrom;
      t_info->ntables = i<b?a+1:a;
      t_info->end_table_to = i < b ? startFrom + a : startFrom + a - 1;
      startFrom = t_info->end_table_to + 1;
      t_info->taos = taos;
      pthread_create(pidsOfSub + i, NULL, subQueryProcess, t_info);
    }

    g_queryInfo.subQueryInfo.threadCnt = threads;
  }else {
    g_queryInfo.subQueryInfo.threadCnt = 0;
  }  
  
  for (int i = 0; i < g_queryInfo.superQueryInfo.concurrent; i++) {
    pthread_join(pids[i], NULL);
  }

  tmfree((char*)pids);
  tmfree((char*)infos);  
  
  for (int i = 0; i < g_queryInfo.subQueryInfo.threadCnt; i++) {
    pthread_join(pidsOfSub[i], NULL);
  }

  tmfree((char*)pidsOfSub);
  tmfree((char*)infosOfSub);  
  
  taos_close(taos);
  return 0;
}

static void subscribe_callback(TAOS_SUB* tsub, TAOS_RES *res, void* param, int code) {  
  if (res == NULL || taos_errno(res) != 0) {
    printf("failed to subscribe result, code:%d, reason:%s\n", code, taos_errstr(res));
    return;
  }
  
  getResult(res, (char*)param);
  taos_free_result(res);
}

static TAOS_SUB* subscribeImpl(TAOS *taos, char *sql, char* topic, char* resultFileName) {
  TAOS_SUB* tsub = NULL;  

  if (g_queryInfo.superQueryInfo.subscribeMode) {
    tsub = taos_subscribe(taos, 
            g_queryInfo.superQueryInfo.subscribeRestart, 
            topic, sql, subscribe_callback, (void*)resultFileName, 
            g_queryInfo.superQueryInfo.subscribeInterval);
  } else {
    tsub = taos_subscribe(taos, 
            g_queryInfo.superQueryInfo.subscribeRestart, 
            topic, sql, NULL, NULL, 0);
  }

  if (tsub == NULL) {
    printf("failed to create subscription. topic:%s, sql:%s\n", topic, sql);
    return NULL;
  } 

  return tsub;
}

void *subSubscribeProcess(void *sarg) {
  threadInfo *winfo = (threadInfo *)sarg; 
  char subSqlstr[1024];

  char sqlStr[MAX_TB_NAME_SIZE*2];
  sprintf(sqlStr, "use %s", g_queryInfo.dbName);
  debugPrint("%s() %d sqlStr: %s\n", __func__, __LINE__, sqlStr);
  if (0 != queryDbExec(winfo->taos, sqlStr, NO_INSERT_TYPE)){
    return NULL;
  }
  
  //int64_t st = 0;
  //int64_t et = 0;
  do {
    //if (g_queryInfo.superQueryInfo.rate && (et - st) < g_queryInfo.superQueryInfo.rate*1000) {
    //  taosMsleep(g_queryInfo.superQueryInfo.rate*1000 - (et - st)); // ms
    //  //printf("========sleep duration:%"PRId64 "========inserted rows:%d, table range:%d - %d\n", (1000 - (et - st)), i, winfo->start_table_from, winfo->end_table_to);
    //}

    //st = taosGetTimestampMs();
    char topic[32] = {0};
    for (int i = 0; i < g_queryInfo.subQueryInfo.sqlCount; i++) {
      sprintf(topic, "taosdemo-subscribe-%d", i);
      memset(subSqlstr,0,sizeof(subSqlstr));
      replaceSubTblName(g_queryInfo.subQueryInfo.sql[i], subSqlstr, i);
      char tmpFile[MAX_FILE_NAME_LEN*2] = {0};
      if (g_queryInfo.subQueryInfo.result[i][0] != 0) {
        sprintf(tmpFile, "%s-%d", g_queryInfo.subQueryInfo.result[i], winfo->threadID);
      }
      g_queryInfo.subQueryInfo.tsub[i] = subscribeImpl(winfo->taos, subSqlstr, topic, tmpFile); 
      if (NULL == g_queryInfo.subQueryInfo.tsub[i]) {
        return NULL;
      }
    }
    //et = taosGetTimestampMs();
    //printf("========thread[%"PRId64"] complete all sqls to super table once queries duration:%.4fs\n", taosGetSelfPthreadId(), (double)(et - st)/1000.0);
  } while (0);

  // start loop to consume result
  TAOS_RES* res = NULL;
  while (1) {
    for (int i = 0; i < g_queryInfo.subQueryInfo.sqlCount; i++) {
      if (1 == g_queryInfo.subQueryInfo.subscribeMode) {
        continue;
      }
      
      res = taos_consume(g_queryInfo.subQueryInfo.tsub[i]);
      if (res) {
        char tmpFile[MAX_FILE_NAME_LEN*2] = {0};
        if (g_queryInfo.subQueryInfo.result[i][0] != 0) {
          sprintf(tmpFile, "%s-%d", 
                  g_queryInfo.subQueryInfo.result[i], 
                  winfo->threadID);
        }
        getResult(res, tmpFile);
      }
    }
  }
  taos_free_result(res);
  
  for (int i = 0; i < g_queryInfo.subQueryInfo.sqlCount; i++) {
    taos_unsubscribe(g_queryInfo.subQueryInfo.tsub[i], 
            g_queryInfo.subQueryInfo.subscribeKeepProgress);
  }
  return NULL;
}

void *superSubscribeProcess(void *sarg) {
  threadInfo *winfo = (threadInfo *)sarg; 

  char sqlStr[MAX_TB_NAME_SIZE*2];
  sprintf(sqlStr, "use %s", g_queryInfo.dbName);
  debugPrint("%s() %d sqlStr: %s\n", __func__, __LINE__, sqlStr);
  if (0 != queryDbExec(winfo->taos, sqlStr, NO_INSERT_TYPE)) {
    return NULL;
  }
  
  //int64_t st = 0;
  //int64_t et = 0;
  do {
    //if (g_queryInfo.superQueryInfo.rate && (et - st) < g_queryInfo.superQueryInfo.rate*1000) {
    //  taosMsleep(g_queryInfo.superQueryInfo.rate*1000 - (et - st)); // ms
    //  //printf("========sleep duration:%"PRId64 "========inserted rows:%d, table range:%d - %d\n", (1000 - (et - st)), i, winfo->start_table_from, winfo->end_table_to);
    //}

    //st = taosGetTimestampMs();
    char topic[32] = {0};
    for (int i = 0; i < g_queryInfo.superQueryInfo.sqlCount; i++) {
      sprintf(topic, "taosdemo-subscribe-%d", i);
      char tmpFile[MAX_FILE_NAME_LEN*2] = {0};
      if (g_queryInfo.subQueryInfo.result[i][0] != 0) {
        sprintf(tmpFile, "%s-%d", 
                g_queryInfo.superQueryInfo.result[i], winfo->threadID);
      }
      g_queryInfo.superQueryInfo.tsub[i] = 
          subscribeImpl(winfo->taos, 
                  g_queryInfo.superQueryInfo.sql[i], 
                  topic, tmpFile); 
      if (NULL == g_queryInfo.superQueryInfo.tsub[i]) {
        return NULL;
      }
    }
    //et = taosGetTimestampMs();
    //printf("========thread[%"PRId64"] complete all sqls to super table once queries duration:%.4fs\n", taosGetSelfPthreadId(), (double)(et - st)/1000.0);
  } while (0);

  // start loop to consume result
  TAOS_RES* res = NULL;
  while (1) {
    for (int i = 0; i < g_queryInfo.superQueryInfo.sqlCount; i++) {
      if (1 == g_queryInfo.superQueryInfo.subscribeMode) {
        continue;
      }
      
      res = taos_consume(g_queryInfo.superQueryInfo.tsub[i]);
      if (res) {
        char tmpFile[MAX_FILE_NAME_LEN*2] = {0};
        if (g_queryInfo.superQueryInfo.result[i][0] != 0) {
          sprintf(tmpFile, "%s-%d", 
                  g_queryInfo.superQueryInfo.result[i], winfo->threadID);
        }
        getResult(res, tmpFile);
      }
    }
  }
  taos_free_result(res);

  for (int i = 0; i < g_queryInfo.superQueryInfo.sqlCount; i++) {
    taos_unsubscribe(g_queryInfo.superQueryInfo.tsub[i], 
            g_queryInfo.superQueryInfo.subscribeKeepProgress);
  }
  return NULL;
}

static int subscribeTestProcess() {
  printfQueryMeta();

  if (!g_args.answer_yes) {
    printf("Press enter key to continue\n\n");
    (void)getchar();
  }

  TAOS * taos = NULL;  
  taos = taos_connect(g_queryInfo.host, 
          g_queryInfo.user, 
          g_queryInfo.password, 
          g_queryInfo.dbName, 
          g_queryInfo.port);
  if (taos == NULL) {
    fprintf(stderr, "Failed to connect to TDengine, reason:%s\n", taos_errstr(NULL));
    exit(-1);
  }

  if (0 != g_queryInfo.subQueryInfo.sqlCount) {
    getAllChildNameOfSuperTable(taos, 
            g_queryInfo.dbName, 
            g_queryInfo.subQueryInfo.sTblName, 
            &g_queryInfo.subQueryInfo.childTblName, 
            &g_queryInfo.subQueryInfo.childTblCount);
  }

  pthread_t  *pids = NULL;
  threadInfo *infos = NULL;
  //==== create sub threads for query from super table
  if (g_queryInfo.superQueryInfo.sqlCount > 0 
          && g_queryInfo.superQueryInfo.concurrent > 0) {
    pids  = malloc(g_queryInfo.superQueryInfo.concurrent * sizeof(pthread_t));
    infos = malloc(g_queryInfo.superQueryInfo.concurrent * sizeof(threadInfo));
    if ((NULL == pids) || (NULL == infos)) {
      printf("malloc failed for create threads\n");
      taos_close(taos);
      exit(-1);
    }

    for (int i = 0; i < g_queryInfo.superQueryInfo.concurrent; i++) {
      threadInfo *t_info = infos + i;
      t_info->threadID = i;
      t_info->taos = taos;
      pthread_create(pids + i, NULL, superSubscribeProcess, t_info);
    }
  }
 
  //==== create sub threads for query from sub table  
  pthread_t  *pidsOfSub  = NULL;
  threadInfo *infosOfSub = NULL;
  if ((g_queryInfo.subQueryInfo.sqlCount > 0)
          && (g_queryInfo.subQueryInfo.threadCnt > 0)) {
    pidsOfSub  = malloc(g_queryInfo.subQueryInfo.threadCnt *
            sizeof(pthread_t));
    infosOfSub = malloc(g_queryInfo.subQueryInfo.threadCnt * 
            sizeof(threadInfo));
    if ((NULL == pidsOfSub) || (NULL == infosOfSub)) {
      printf("malloc failed for create threads\n");
      taos_close(taos);
      exit(-1);
    }

    int ntables = g_queryInfo.subQueryInfo.childTblCount;
    int threads = g_queryInfo.subQueryInfo.threadCnt;
 
    int a = ntables / threads;
    if (a < 1) {
      threads = ntables;
      a = 1;
    }
 
    int b = 0;
    if (threads != 0) {
      b = ntables % threads;
    }
 
    int startFrom = 0;
    for (int i = 0; i < threads; i++) {
      threadInfo *t_info = infosOfSub + i;
      t_info->threadID = i;

      t_info->start_table_from = startFrom;
      t_info->ntables = i<b?a+1:a;
      t_info->end_table_to = i < b ? startFrom + a : startFrom + a - 1;
      startFrom = t_info->end_table_to + 1;
      t_info->taos = taos;
      pthread_create(pidsOfSub + i, NULL, subSubscribeProcess, t_info);
    }
    g_queryInfo.subQueryInfo.threadCnt = threads;
  }
 
  for (int i = 0; i < g_queryInfo.superQueryInfo.concurrent; i++) {
    pthread_join(pids[i], NULL);
  }  

  tmfree((char*)pids);
  tmfree((char*)infos);

  for (int i = 0; i < g_queryInfo.subQueryInfo.threadCnt; i++) {
    pthread_join(pidsOfSub[i], NULL);
  }

  tmfree((char*)pidsOfSub);
  tmfree((char*)infosOfSub);
  taos_close(taos);
  return 0;
}

void initOfInsertMeta() {
  memset(&g_Dbs, 0, sizeof(SDbs));
   
  // set default values
  tstrncpy(g_Dbs.host, "127.0.0.1", MAX_DB_NAME_SIZE);
  g_Dbs.port = 6030;
  tstrncpy(g_Dbs.user, TSDB_DEFAULT_USER, MAX_DB_NAME_SIZE);
  tstrncpy(g_Dbs.password, TSDB_DEFAULT_PASS, MAX_DB_NAME_SIZE);
  g_Dbs.threadCount = 2;
  g_Dbs.use_metric = true;
}

void initOfQueryMeta() {
  memset(&g_queryInfo, 0, sizeof(SQueryMetaInfo));
   
  // set default values
  tstrncpy(g_queryInfo.host, "127.0.0.1", MAX_DB_NAME_SIZE);
  g_queryInfo.port = 6030;
  tstrncpy(g_queryInfo.user, TSDB_DEFAULT_USER, MAX_DB_NAME_SIZE);
  tstrncpy(g_queryInfo.password, TSDB_DEFAULT_PASS, MAX_DB_NAME_SIZE);
}

void setParaFromArg(){
  if (g_args.host) {
    strcpy(g_Dbs.host, g_args.host);
  } else {
    tstrncpy(g_Dbs.host, "127.0.0.1", MAX_DB_NAME_SIZE);
  }

  if (g_args.user) {
    strcpy(g_Dbs.user, g_args.user);
  } 

  if (g_args.password) {
    strcpy(g_Dbs.password, g_args.password);
  } 
  
  if (g_args.port) {
    g_Dbs.port = g_args.port;
  } 

  g_Dbs.threadCount = g_args.num_of_threads;
  g_Dbs.threadCountByCreateTbl = g_args.num_of_threads;

  g_Dbs.dbCount = 1;
  g_Dbs.db[0].drop = 1;

  tstrncpy(g_Dbs.db[0].dbName, g_args.database, MAX_DB_NAME_SIZE);
  g_Dbs.db[0].dbCfg.replica = g_args.replica;
  tstrncpy(g_Dbs.db[0].dbCfg.precision, "ms", MAX_DB_NAME_SIZE);

  tstrncpy(g_Dbs.resultFile, g_args.output_file, MAX_FILE_NAME_LEN);

  g_Dbs.use_metric = g_args.use_metric;
  g_Dbs.insert_only = g_args.insert_only;

  g_Dbs.do_aggreFunc = true;

  char dataString[STRING_LEN];
  char **data_type = g_args.datatype;
  
  memset(dataString, 0, STRING_LEN);

  if (strcasecmp(data_type[0], "BINARY") == 0 
          || strcasecmp(data_type[0], "BOOL") == 0 
          || strcasecmp(data_type[0], "NCHAR") == 0 ) {
    g_Dbs.do_aggreFunc = false;
  }

  if (g_args.use_metric) {
    g_Dbs.db[0].superTblCount = 1;
    tstrncpy(g_Dbs.db[0].superTbls[0].sTblName, "meters", MAX_TB_NAME_SIZE);
    g_Dbs.db[0].superTbls[0].childTblCount = g_args.num_of_tables;
    g_Dbs.threadCount = g_args.num_of_threads;
    g_Dbs.threadCountByCreateTbl = 1;
    g_Dbs.queryMode = g_args.mode;
  
    g_Dbs.db[0].superTbls[0].autoCreateTable = PRE_CREATE_SUBTBL;
    g_Dbs.db[0].superTbls[0].superTblExists = TBL_NO_EXISTS;
    g_Dbs.db[0].superTbls[0].childTblExists = TBL_NO_EXISTS;
    g_Dbs.db[0].superTbls[0].disorderRange = g_args.disorderRange;
    g_Dbs.db[0].superTbls[0].disorderRatio = g_args.disorderRatio;
    tstrncpy(g_Dbs.db[0].superTbls[0].childTblPrefix, 
            g_args.tb_prefix, MAX_TB_NAME_SIZE);
    tstrncpy(g_Dbs.db[0].superTbls[0].dataSource, "rand", MAX_TB_NAME_SIZE);
    tstrncpy(g_Dbs.db[0].superTbls[0].insertMode, "taosc", MAX_TB_NAME_SIZE);
    tstrncpy(g_Dbs.db[0].superTbls[0].startTimestamp, 
            "2017-07-14 10:40:00.000", MAX_TB_NAME_SIZE);
    g_Dbs.db[0].superTbls[0].timeStampStep = DEFAULT_TIMESTAMP_STEP;
  
    g_Dbs.db[0].superTbls[0].insertRows = g_args.num_of_DPT;
    g_Dbs.db[0].superTbls[0].maxSqlLen = TSDB_PAYLOAD_SIZE;

    g_Dbs.db[0].superTbls[0].columnCount = 0;
    for (int i = 0; i < MAX_NUM_DATATYPE; i++) {
      if (data_type[i] == NULL) {
        break;
      }
  
      tstrncpy(g_Dbs.db[0].superTbls[0].columns[i].dataType, 
              data_type[i], MAX_TB_NAME_SIZE);
      g_Dbs.db[0].superTbls[0].columns[i].dataLen = g_args.len_of_binary;    
      g_Dbs.db[0].superTbls[0].columnCount++;
    }
  
    if (g_Dbs.db[0].superTbls[0].columnCount > g_args.num_of_CPR) {
      g_Dbs.db[0].superTbls[0].columnCount = g_args.num_of_CPR;
    } else {
      for (int i = g_Dbs.db[0].superTbls[0].columnCount; i < g_args.num_of_CPR; i++) {
        tstrncpy(g_Dbs.db[0].superTbls[0].columns[i].dataType, "INT", MAX_TB_NAME_SIZE);
        g_Dbs.db[0].superTbls[0].columns[i].dataLen = 0;    
        g_Dbs.db[0].superTbls[0].columnCount++;
      }
    }

    tstrncpy(g_Dbs.db[0].superTbls[0].tags[0].dataType, "INT", MAX_TB_NAME_SIZE);
    g_Dbs.db[0].superTbls[0].tags[0].dataLen = 0;    
  
    tstrncpy(g_Dbs.db[0].superTbls[0].tags[1].dataType, "BINARY", MAX_TB_NAME_SIZE);
    g_Dbs.db[0].superTbls[0].tags[1].dataLen = g_args.len_of_binary;    
    g_Dbs.db[0].superTbls[0].tagCount = 2;  
  } else {
    g_Dbs.threadCountByCreateTbl = 1;
    g_Dbs.db[0].superTbls[0].tagCount = 0; 
  }

}

/* Function to do regular expression check */
static int regexMatch(const char *s, const char *reg, int cflags) {
  regex_t regex;
  char    msgbuf[100] = {0};

  /* Compile regular expression */
  if (regcomp(&regex, reg, cflags) != 0) {
    printf("Fail to compile regex\n");
    exit(-1);
  }

  /* Execute regular expression */
  int reti = regexec(&regex, s, 0, NULL, 0);
  if (!reti) {
    regfree(&regex);
    return 1;
  } else if (reti == REG_NOMATCH) {
    regfree(&regex);
    return 0;
  } else {
    regerror(reti, &regex, msgbuf, sizeof(msgbuf));
    printf("Regex match failed: %s\n", msgbuf);
    regfree(&regex);
    exit(-1);
  }

  return 0;
}

static int isCommentLine(char *line) {
  if (line == NULL) return 1;

  return regexMatch(line, "^\\s*#.*", REG_EXTENDED);
}

void querySqlFile(TAOS* taos, char* sqlFile)
{
  FILE *fp = fopen(sqlFile, "r");
  if (fp == NULL) {
    printf("failed to open file %s, reason:%s\n", sqlFile, strerror(errno));
    return;
  }

  int       read_len = 0;
  char *    cmd = calloc(1, MAX_SQL_SIZE);
  size_t    cmd_len = 0;
  char *    line = NULL;
  size_t    line_len = 0;

  double t = getCurrentTime();

  while ((read_len = tgetline(&line, &line_len, fp)) != -1) {
    if (read_len >= MAX_SQL_SIZE) continue;
    line[--read_len] = '\0';

    if (read_len == 0 || isCommentLine(line)) {  // line starts with #
      continue;
    }

    if (line[read_len - 1] == '\\') {
      line[read_len - 1] = ' ';
      memcpy(cmd + cmd_len, line, read_len);
      cmd_len += read_len;
      continue;
    }

    memcpy(cmd + cmd_len, line, read_len);
    verbosePrint("%s() LN%d cmd: %s\n", __func__, __LINE__, cmd);
    queryDbExec(taos, cmd, NO_INSERT_TYPE);
    if (0 != queryDbExec(taos, cmd, NO_INSERT_TYPE)) {
        printf("queryDbExec %s failed!\n", cmd);
        tmfree(cmd);
        tmfree(line);
        tmfclose(fp);
        return;
    }
    memset(cmd, 0, MAX_SQL_SIZE);
    cmd_len = 0;
  }

  t = getCurrentTime() - t;
  printf("run %s took %.6f second(s)\n\n", sqlFile, t);

  tmfree(cmd);
  tmfree(line);
  tmfclose(fp);
  return;
}

static void testMetaFile() {
    if (INSERT_TEST == g_args.test_mode) {
      if (g_Dbs.cfgDir[0]) taos_options(TSDB_OPTION_CONFIGDIR, g_Dbs.cfgDir);
      insertTestProcess();
    } else if (QUERY_TEST == g_args.test_mode) {
      if (g_queryInfo.cfgDir[0])
          taos_options(TSDB_OPTION_CONFIGDIR, g_queryInfo.cfgDir);
      queryTestProcess();
    } else if (SUBSCRIBE_TEST == g_args.test_mode) {
      if (g_queryInfo.cfgDir[0])
          taos_options(TSDB_OPTION_CONFIGDIR, g_queryInfo.cfgDir);
      subscribeTestProcess();
    }  else {
      ;
    }
}

static void queryResult() {
    // select
    if (false == g_Dbs.insert_only) {
      // query data

      pthread_t read_id;
      threadInfo *rInfo = malloc(sizeof(threadInfo));
      rInfo->start_time = 1500000000000;  // 2017-07-14 10:40:00.000
      rInfo->start_table_from = 0;

      //rInfo->do_aggreFunc = g_Dbs.do_aggreFunc;
      if (g_args.use_metric) {
        rInfo->ntables = g_Dbs.db[0].superTbls[0].childTblCount;
        rInfo->end_table_to = g_Dbs.db[0].superTbls[0].childTblCount - 1;
        rInfo->superTblInfo = &g_Dbs.db[0].superTbls[0];
        strcpy(rInfo->tb_prefix, 
              g_Dbs.db[0].superTbls[0].childTblPrefix);
      } else {
        rInfo->ntables = g_args.num_of_tables;
        rInfo->end_table_to = g_args.num_of_tables -1;
        strcpy(rInfo->tb_prefix, g_args.tb_prefix);
      }

      rInfo->taos = taos_connect(
              g_Dbs.host, 
              g_Dbs.user, 
              g_Dbs.password, 
              g_Dbs.db[0].dbName, 
              g_Dbs.port);
      if (rInfo->taos == NULL) {
        fprintf(stderr, "Failed to connect to TDengine, reason:%s\n", taos_errstr(NULL));
        free(rInfo);
        exit(-1);
      }

      strcpy(rInfo->fp, g_Dbs.resultFile);

      if (!g_Dbs.use_metric) {
        pthread_create(&read_id, NULL, readTable, rInfo);
      } else {
        pthread_create(&read_id, NULL, readMetric, rInfo);
      }
      pthread_join(read_id, NULL);
      taos_close(rInfo->taos);
      free(rInfo);
    }
}

static void testCmdLine() {

    g_args.test_mode = INSERT_TEST;
    insertTestProcess();

    if (g_Dbs.insert_only)
      return;
    else
        queryResult();
}

int main(int argc, char *argv[]) {
  parse_args(argc, argv, &g_args);

  debugPrint("meta file: %s\n", g_args.metaFile);

  if (g_args.metaFile) {
    initOfInsertMeta();
    initOfQueryMeta();    

    if (false == getInfoFromJsonFile(g_args.metaFile)) {
      printf("Failed to read %s\n", g_args.metaFile);
      return 1;
    }

    testMetaFile();
  } else {
    memset(&g_Dbs, 0, sizeof(SDbs));
    setParaFromArg();

    if (NULL != g_args.sqlFile) {
      TAOS* qtaos = taos_connect(
          g_Dbs.host, 
          g_Dbs.user, 
          g_Dbs.password, 
          g_Dbs.db[0].dbName, 
          g_Dbs.port);
      querySqlFile(qtaos, g_args.sqlFile);  
      taos_close(qtaos);

    } else {
      testCmdLine();
    }
  }

  return 0;
}