tsclient.h 13.5 KB
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/*
 * 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/>.
 */

#ifndef TDENGINE_TSCLIENT_H
#define TDENGINE_TSCLIENT_H

#ifdef __cplusplus
extern "C" {
#endif

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#include "os.h"
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#include "taos.h"
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#include "taosdef.h"
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#include "taosmsg.h"
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#include "tarray.h"
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#include "tglobal.h"
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#include "tsqlfunction.h"
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#include "tutil.h"

#include "qsqlparser.h"
#include "qsqltype.h"
#include "qtsbuf.h"
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#include "queryExecutor.h"
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// forward declaration
struct SSqlInfo;
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struct SLocalReducer;

// data source from sql string or from file
enum {
  DATA_FROM_SQL_STRING = 1,
  DATA_FROM_DATA_FILE = 2,
};
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typedef struct STableComInfo {
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  uint8_t numOfTags;
  uint8_t precision;
  int16_t numOfColumns;
  int16_t rowSize;
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} STableComInfo;
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typedef struct STableMeta {
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  // super table if it is created according to super table, otherwise, tableInfo is used
  union {
    struct STableMeta *pSTable;
    STableComInfo      tableInfo;
  };
  uint8_t       tableType;
  int16_t       sversion;
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  SCMVgroupInfo vgroupInfo;
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  int32_t       sid;       // the index of one table in a virtual node
  uint64_t      uid;       // unique id of a table
  SSchema       schema[];  // if the table is TSDB_CHILD_TABLE, schema is acquired by super table meta info
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} STableMeta;

typedef struct STableMetaInfo {
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  STableMeta *  pTableMeta;      // table meta, cached in client side and acquired by name
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  SVgroupsInfo *vgroupList;
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  SArray       *pVgroupTables;   // SArray<SVgroupTableInfo>
  
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  /*
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   * 1. keep the vgroup index during the multi-vnode super table projection query
   * 2. keep the vgroup index for multi-vnode insertion
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   */
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  int32_t vgroupIndex;
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  char    name[TSDB_TABLE_ID_LEN];        // (super) table name
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  SArray* tagColList;                     // SArray<SColumn*>, involved tag columns
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} STableMetaInfo;
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/* the structure for sql function in select clause */
typedef struct SSqlExpr {
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  char      aliasName[TSDB_COL_NAME_LEN];  // as aliasName
  SColIndex colInfo;
  int64_t   uid;            // refactor use the pointer
  int16_t   functionId;     // function id in aAgg array
  int16_t   resType;        // return value type
  int16_t   resBytes;       // length of return value
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  int16_t   interBytes;  // inter result buffer size
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  int16_t   numOfParams;    // argument value of each function
  tVariant  param[3];       // parameters are not more than 3
  int32_t   offset;         // sub result column value of arithmetic expression.
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} SSqlExpr;

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typedef struct SColumnIndex {
  int16_t tableIndex;
  int16_t columnIndex;
} SColumnIndex;

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typedef struct SFieldSupInfo {
  bool            visible;
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  SExprInfo      *pArithExprInfo;
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  SSqlExpr *      pSqlExpr;
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} SFieldSupInfo;
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typedef struct SFieldInfo {
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  int16_t numOfOutput;   // number of column in result
  SArray *pFields;       // SArray<TAOS_FIELD>
  SArray *pSupportInfo;  // SArray<SFieldSupInfo>
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} SFieldInfo;

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typedef struct SColumn {
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  SColumnIndex       colIndex;
  int32_t            numOfFilters;
  SColumnFilterInfo *filterInfo;
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} SColumn;
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typedef struct SCond {
  uint64_t uid;
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  int32_t  len;  // length of tag query condition data
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  char *   cond;
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} SCond;

typedef struct SJoinNode {
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  char     tableId[TSDB_TABLE_ID_LEN];
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  uint64_t uid;
  int16_t  tagCol;
} SJoinNode;

typedef struct SJoinInfo {
  bool      hasJoin;
  SJoinNode left;
  SJoinNode right;
} SJoinInfo;

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typedef struct STagCond {
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  // relation between tbname list and query condition, including : TK_AND or TK_OR
  int16_t relType;

  // tbname query condition, only support tbname query condition on one table
  SCond tbnameCond;

  // join condition, only support two tables join currently
  SJoinInfo joinInfo;

  // for different table, the query condition must be seperated
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  SArray *pCond;
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} STagCond;

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typedef struct SParamInfo {
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  int32_t  idx;
  char     type;
  uint8_t  timePrec;
  short    bytes;
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  uint32_t offset;
} SParamInfo;

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typedef struct STableDataBlocks {
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  char    tableId[TSDB_TABLE_ID_LEN];
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  int8_t  tsSource;     // where does the UNIX timestamp come from, server or client
  bool    ordered;      // if current rows are ordered or not
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  int64_t vgId;         // virtual group id
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  int64_t prevTS;       // previous timestamp, recorded to decide if the records array is ts ascending
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  int32_t numOfTables;  // number of tables in current submit block
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  int32_t  rowSize;  // row size for current table
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  uint32_t nAllocSize;
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  uint32_t headerSize;  // header for metadata (submit metadata)
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  uint32_t size;
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  /*
   * the metermeta for current table, the metermeta will be used during submit stage, keep a ref
   * to avoid it to be removed from cache
   */
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  STableMeta *pTableMeta;
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  union {
    char *filename;
    char *pData;
  };
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  // for parameter ('?') binding
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  uint32_t    numOfAllocedParams;
  uint32_t    numOfParams;
  SParamInfo *params;
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} STableDataBlocks;
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typedef struct SDataBlockList {  // todo remove
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  uint32_t           nSize;
  uint32_t           nAlloc;
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  STableDataBlocks **pData;
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} SDataBlockList;

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typedef struct SQueryInfo {
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  int16_t  command;  // the command may be different for each subclause, so keep it seperately.
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  uint32_t type;     // query/insert/import type
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  char     slidingTimeUnit;
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  STimeWindow     window;
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  int64_t         intervalTime;  // aggregation time interval
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  int64_t         slidingTime;   // sliding window in mseconds
  SSqlGroupbyExpr groupbyExpr;   // group by tags info
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  SArray *         colList;      // SArray<SColumn*>
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  SFieldInfo       fieldsInfo;
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  SArray *         exprList;    // SArray<SSqlExpr*>
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  SLimitVal        limit;
  SLimitVal        slimit;
  STagCond         tagCond;
  SOrderVal        order;
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  int16_t          fillType;  // interpolate type
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  int16_t          numOfTables;
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  STableMetaInfo **pTableMetaInfo;
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  struct STSBuf *  tsBuf;
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  int64_t *        defaultVal;   // default value for interpolation
  char *           msg;          // pointer to the pCmd->payload to keep error message temporarily
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  int64_t          clauseLimit;  // limit for current sub clause
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  // offset value in the original sql expression, NOT sent to virtual node, only applied at client side
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  int64_t          prjOffset;
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} SQueryInfo;

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typedef struct {
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  int     command;
  uint8_t msgType;
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  union {
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    bool   existsCheck;     // check if the table exists or not
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    bool   autoCreated;     // if the table is missing, on-the-fly create it. during getmeterMeta
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    int8_t dataSourceType;  // load data from file or not
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  };
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  union {
    int32_t count;
    int32_t numOfTablesInSubmit;
  };
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  int32_t      clauseIndex;  // index of multiple subclause query
  int8_t       parseFinished;
  short        numOfCols;
  uint32_t     allocSize;
  char *       payload;
  int32_t      payloadLen;
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  SQueryInfo **pQueryInfo;
  int32_t      numOfClause;
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  SDataBlockList *pDataBlocks;  // submit data blocks after parsing sql
  char *          curSql;       // current sql, resume position of sql after parsing paused
  void *          pTableList;   // referred table involved in sql

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  // for parameter ('?') binding and batch processing
  int32_t batchSize;
  int32_t numOfParams;
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} SSqlCmd;

typedef struct SResRec {
  int numOfRows;
  int numOfTotal;
} SResRec;

typedef struct {
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  int64_t               numOfRows;                  // num of results in current retrieved
  int64_t               numOfTotal;                 // num of total results
  int64_t               numOfTotalInCurrentClause;  // num of total result in current subclause
  char *                pRsp;
  int32_t               rspType;
  int32_t               rspLen;
  uint64_t              qhandle;
  int64_t               uid;
  int64_t               useconds;
  int64_t               offset;  // offset value from vnode during projection query of stable
  int32_t               row;
  int16_t               numOfCols;
  int16_t               precision;
  bool                  completed;
  int32_t               code;
  int32_t               numOfGroups;
  SResRec *             pGroupRec;
  char *                data;
  void **               tsrow;
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  int32_t*              length;  // length for each field for current row
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  char **               buffer;  // Buffer used to put multibytes encoded using unicode (wchar_t)
  SColumnIndex *        pColumnIndex;
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  SArithmeticSupport*   pArithSup;   // support the arithmetic expression calculation on agg functions
  
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  struct SLocalReducer *pLocalReducer;
} SSqlRes;

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typedef struct STscObj {
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  void *             signature;
  void *             pTimer;
  char               mgmtIp[TSDB_USER_LEN];
  uint16_t           mgmtPort;
  char               user[TSDB_USER_LEN];
  char               pass[TSDB_KEY_LEN];
  char               acctId[TSDB_DB_NAME_LEN];
  char               db[TSDB_TABLE_ID_LEN];
  char               sversion[TSDB_VERSION_LEN];
  char               writeAuth : 1;
  char               superAuth : 1;
  struct SSqlObj *   pSql;
  struct SSqlObj *   pHb;
  struct SSqlObj *   sqlList;
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  struct SSqlStream *streamList;
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  void*              pDnodeConn;
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  pthread_mutex_t    mutex;
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} STscObj;

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typedef struct SSqlObj {
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  void *   signature;
  STscObj *pTscObj;
  void (*fp)();
  void (*fetchFp)();
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  void *           param;
  int64_t          stime;
  uint32_t         queryId;
  void *           pStream;
  void *           pSubscription;
  char *           sqlstr;
  char             retry;
  char             maxRetry;
  SRpcIpSet        ipList;
  char             freed : 4;
  char             listed : 4;
  tsem_t           rspSem;
  SSqlCmd          cmd;
  SSqlRes          res;
  uint8_t          numOfSubs;
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  struct SSqlObj **pSubs;
  struct SSqlObj * prev, *next;
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} SSqlObj;

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typedef struct SSqlStream {
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  SSqlObj *pSql;
  uint32_t streamId;
  char     listed;
  int64_t  num;  // number of computing count

  /*
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   * keep the number of current result in computing,
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   * the value will be set to 0 before set timer for next computing
   */
  int64_t numOfRes;

  int64_t useconds;  // total  elapsed time
  int64_t ctime;     // stream created time
  int64_t stime;     // stream next executed time
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  int64_t etime;     // stream end query time, when time is larger then etime, the stream will be closed
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  int64_t interval;
  int64_t slidingTime;
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  int16_t precision;
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  void *  pTimer;

  void (*fp)();
  void *param;

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  void (*callback)(void *);  // Callback function when stream is stopped from client level
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  struct SSqlStream *prev, *next;
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} SSqlStream;

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int32_t tscInitRpc(const char *user, const char *secret, void** pDnodeConn);
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void    tscInitMsgsFp();
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int tsParseSql(SSqlObj *pSql, bool multiVnodeInsertion);
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void tscProcessMsgFromServer(SRpcMsg *rpcMsg, SRpcIpSet *pIpSet);
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int  tscProcessSql(SSqlObj *pSql);
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int  tscRenewMeterMeta(SSqlObj *pSql, char *tableId);
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void tscQueueAsyncRes(SSqlObj *pSql);
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void tscQueueAsyncError(void(*fp), void *param, int32_t code);
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int tscProcessLocalCmd(SSqlObj *pSql);
int tscCfgDynamicOptions(char *msg);
int taos_retrieve(TAOS_RES *res);

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int32_t tscTansformSQLFuncForSTableQuery(SQueryInfo *pQueryInfo);
void    tscRestoreSQLFuncForSTableQuery(SQueryInfo *pQueryInfo);
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int32_t tscCreateResPointerInfo(SSqlRes *pRes, SQueryInfo *pQueryInfo);
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void    tscDestroyResPointerInfo(SSqlRes *pRes);
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void tscResetSqlCmdObj(SSqlCmd *pCmd);
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/**
 * free query result of the sql object
 * @param pObj
 */
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void tscFreeSqlResult(SSqlObj *pSql);
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/**
 * only free part of resources allocated during query.
 * Note: this function is multi-thread safe.
 * @param pObj
 */
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void tscPartiallyFreeSqlObj(SSqlObj *pObj);
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/**
 * free sql object, release allocated resource
 * @param pObj  Free metric/meta information, dynamically allocated payload, and
 * response buffer, object itself
 */
void tscFreeSqlObj(SSqlObj *pObj);

void tscCloseTscObj(STscObj *pObj);

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TAOS *taos_connect_a(char *ip, char *user, char *pass, char *db, uint16_t port, void (*fp)(void *, TAOS_RES *, int),
                     void *param, void **taos);

void doAsyncQuery(STscObj *pObj, SSqlObj *pSql, void (*fp)(), void *param, const char *sqlstr, size_t sqlLen);
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void tscProcessMultiVnodesInsertFromFile(SSqlObj *pSql);
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void tscKillSTableQuery(SSqlObj *pSql);
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void tscInitResObjForLocalQuery(SSqlObj *pObj, int32_t numOfRes, int32_t rowLen);
bool tscIsUpdateQuery(STscObj *pObj);
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bool tscHasReachLimitation(SQueryInfo *pQueryInfo, SSqlRes *pRes);
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char *tscGetErrorMsgPayload(SSqlCmd *pCmd);
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int32_t tscInvalidSQLErrMsg(char *msg, const char *additionalInfo, const char *sql);
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void    tscQueueAsyncFreeResult(SSqlObj *pSql);
int32_t tscToSQLCmd(SSqlObj *pSql, struct SSqlInfo *pInfo);
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void    tscGetResultColumnChr(SSqlRes *pRes, SFieldInfo* pFieldInfo, int32_t column);
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extern void *    tscCacheHandle;
extern void *    tscTmr;
extern void *    tscQhandle;
extern int       tscKeepConn[];
extern int       tsInsertHeadSize;
extern int       tscNumOfThreads;
extern SRpcIpSet tscMgmtIpSet;

extern int (*tscBuildMsg[TSDB_SQL_MAX])(SSqlObj *pSql, SSqlInfo *pInfo);
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typedef void (*__async_cb_func_t)(void *param, TAOS_RES *tres, int numOfRows);

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int32_t tscCompareTidTags(const void* p1, const void* p2);
void tscBuildVgroupTableInfo(STableMetaInfo* pTableMetaInfo, SArray* tables);

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#ifdef __cplusplus
}
#endif

#endif