query.h

/*
 * 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 _TD_QUERY_H_
#define _TD_QUERY_H_

#ifdef __cplusplus
extern "C" {
#endif

#include "tarray.h"
#include "thash.h"
#include "tlog.h"
#include "tmsg.h"

enum {
  JOB_TASK_STATUS_NULL = 0,
  JOB_TASK_STATUS_NOT_START = 1,
  JOB_TASK_STATUS_EXECUTING,
  JOB_TASK_STATUS_PARTIAL_SUCCEED,
  JOB_TASK_STATUS_SUCCEED,
  JOB_TASK_STATUS_FAILED,
  JOB_TASK_STATUS_CANCELLING,
  JOB_TASK_STATUS_CANCELLED,
  JOB_TASK_STATUS_DROPPING,
  JOB_TASK_STATUS_FREEING,
};

enum {
  TASK_TYPE_PERSISTENT = 1,
  TASK_TYPE_TEMP,
};

typedef struct STableComInfo {
  uint8_t numOfTags;      // the number of tags in schema
  uint8_t precision;      // the number of precision
  int16_t numOfColumns;   // the number of columns
  int32_t rowSize;        // row size of the schema
} STableComInfo;

/*
 * ASSERT(sizeof(SCTableMeta) == 24)
 * ASSERT(tableType == TSDB_CHILD_TABLE)
 * The cached child table meta info. For each child table, 24 bytes are required to keep the essential table info.
 */
typedef struct SCTableMeta {
  int32_t  vgId:24;
  int8_t   tableType;
  uint64_t uid;
  uint64_t suid;
} SCTableMeta;

/*
 * Note that the first 24 bytes of STableMeta are identical to SCTableMeta, it is safe to cast a STableMeta to be a SCTableMeta.
 */
typedef struct STableMeta {
  //BEGIN: KEEP THIS PART SAME WITH SCTableMeta
  int32_t        vgId:24;
  int8_t         tableType;
  uint64_t       uid;
  uint64_t       suid;
  //END: KEEP THIS PART SAME WITH SCTableMeta
  
  // if the table is TSDB_CHILD_TABLE, the following information is acquired from the corresponding super table meta info
  int16_t        sversion;
  int16_t        tversion;
  STableComInfo  tableInfo;
  SSchema        schema[];
} STableMeta;

typedef struct SDBVgInfo {
  int32_t   vgVersion;  
  int8_t    hashMethod;
  SHashObj *vgHash;  //key:vgId, value:SVgroupInfo
} SDBVgInfo;

typedef struct SUseDbOutput {
  char           db[TSDB_DB_FNAME_LEN];
  uint64_t       dbId;
  SDBVgInfo     *dbVgroup;
} SUseDbOutput;

enum {
  META_TYPE_NULL_TABLE = 1,
  META_TYPE_CTABLE,
  META_TYPE_TABLE,
  META_TYPE_BOTH_TABLE
};


typedef struct STableMetaOutput {
  int32_t     metaType;
  uint64_t    dbId;
  char        dbFName[TSDB_DB_FNAME_LEN];
  char        ctbName[TSDB_TABLE_NAME_LEN];
  char        tbName[TSDB_TABLE_NAME_LEN];
  SCTableMeta ctbMeta;
  STableMeta *tbMeta;
} STableMetaOutput;

typedef struct SDataBuf {
  void     *pData;
  uint32_t  len;
  void     *handle;
} SDataBuf;

typedef int32_t (*__async_send_cb_fn_t)(void* param, const SDataBuf* pMsg, int32_t code);
typedef int32_t (*__async_exec_fn_t)(void* param);

typedef struct SMsgSendInfo {
  __async_send_cb_fn_t fp;        //async callback function
  void     *param;
  uint64_t  requestId;
  uint64_t  requestObjRefId;
  int32_t   msgType;
  SDataBuf  msgInfo;
} SMsgSendInfo;

typedef struct SQueryNodeAddr {
  int32_t nodeId;  // vgId or qnodeId
  SEpSet  epset;
} SQueryNodeAddr;

int32_t initTaskQueue();
int32_t cleanupTaskQueue();

/**
 *
 * @param execFn      The asynchronously execution function
 * @param execParam   The parameters of the execFn
 * @param code        The response code during execution the execFn
 * @return
 */
int32_t taosAsyncExec(__async_exec_fn_t execFn, void* execParam, int32_t* code);

/**
 * Asynchronously send message to server, after the response received, the callback will be incured.
 *
 * @param pTransporter
 * @param epSet
 * @param pTransporterId
 * @param pInfo
 * @return
 */
int32_t asyncSendMsgToServer(void *pTransporter, SEpSet* epSet, int64_t* pTransporterId, const SMsgSendInfo* pInfo);

int32_t queryBuildUseDbOutput(SUseDbOutput *pOut, SUseDbRsp *usedbRsp);

void initQueryModuleMsgHandle();

const SSchema* tGetTbnameColumnSchema();
bool tIsValidSchema(struct SSchema* pSchema, int32_t numOfCols, int32_t numOfTags);

int32_t queryCreateTableMetaFromMsg(STableMetaRsp* msg, bool isSuperTable, STableMeta **pMeta);

extern int32_t (*queryBuildMsg[TDMT_MAX])(void* input, char **msg, int32_t msgSize, int32_t *msgLen);
extern int32_t (*queryProcessMsgRsp[TDMT_MAX])(void* output, char *msg, int32_t msgSize);


#define SET_META_TYPE_NULL(t) (t) = META_TYPE_NULL_TABLE
#define SET_META_TYPE_CTABLE(t) (t) = META_TYPE_CTABLE
#define SET_META_TYPE_TABLE(t) (t) = META_TYPE_TABLE
#define SET_META_TYPE_BOTH_TABLE(t) (t) = META_TYPE_BOTH_TABLE

#define qFatal(...)  do { if (qDebugFlag & DEBUG_FATAL) { taosPrintLog("QRY FATAL ", qDebugFlag, __VA_ARGS__); }} while(0)
#define qError(...)  do { if (qDebugFlag & DEBUG_ERROR) { taosPrintLog("QRY ERROR ", qDebugFlag, __VA_ARGS__); }} while(0)
#define qWarn(...)   do { if (qDebugFlag & DEBUG_WARN)  { taosPrintLog("QRY WARN ", qDebugFlag, __VA_ARGS__); }}  while(0)
#define qInfo(...)   do { if (qDebugFlag & DEBUG_INFO)  { taosPrintLog("QRY ", qDebugFlag, __VA_ARGS__); }} while(0)
#define qDebug(...)  do { if (qDebugFlag & DEBUG_DEBUG) { taosPrintLog("QRY ", qDebugFlag, __VA_ARGS__); }} while(0)
#define qTrace(...)  do { if (qDebugFlag & DEBUG_TRACE) { taosPrintLog("QRY ", qDebugFlag, __VA_ARGS__); }} while(0)
#define qDebugL(...) do { if (qDebugFlag & DEBUG_DEBUG) { taosPrintLongString("QRY ", qDebugFlag, __VA_ARGS__); }} while(0)


#ifdef __cplusplus
}
#endif

#endif /*_TD_QUERY_H_*/