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add the union support in sql parser: fix bugs and refactor some codes. #1032. [TBASE-1140]

This commit is contained in:
hjxilinx 2020-01-08 13:03:48 +08:00
parent d99b94a582
commit 82706e1b41
10 changed files with 367 additions and 297 deletions
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5
src/client/inc/tscUtil.h
View File

@ -238,6 +238,11 @@ void sortRemoveDuplicates(STableDataBlocks* dataBuf);
void tscPrintSelectClause(SSqlCmd* pCmd, int32_t subClauseIndex);
bool hasMoreVnodesToTry(SSqlObj *pSql);
void tscTryQueryNextVnode(SSqlObj *pSql, __async_cb_func_t fp);
void tscAsyncQuerySingleRowForNextVnode(void *param, TAOS_RES *tres, int numOfRows);
#ifdef __cplusplus
}
#endif

2
src/client/inc/tsclient.h
View File

@ -457,6 +457,8 @@ extern int tsInsertHeadSize;
extern int tscNumOfThreads;
extern SIpStrList tscMgmtIpList;
typedef void (*__async_cb_func_t)(void *param, TAOS_RES *tres, int numOfRows);
#ifdef __cplusplus
}
#endif

18
src/client/src/tscAst.c
View File

@ -17,6 +17,7 @@
#include "taosmsg.h"
#include "tast.h"
#include "tlog.h"
#include "tscSQLParser.h"
#include "tscSyntaxtreefunction.h"
#include "tschemautil.h"
#include "tsdb.h"
@ -26,7 +27,6 @@
#include "tstoken.h"
#include "ttypes.h"
#include "tutil.h"
#include "tscSQLParser.h"
/*
*
@ -117,7 +117,7 @@ static tSQLSyntaxNode *tSQLSyntaxNodeCreate(SSchema *pSchema, int32_t numOfCols,
do {
SSQLToken tableToken = {0};
extractTableNameFromToken(pToken, &tableToken);
size_t len = strlen(pSchema[i].name);
if (strncmp(pToken->z, pSchema[i].name, pToken->n) == 0 && pToken->n == len) break;
} while (++i < numOfCols);
@ -271,7 +271,7 @@ static tSQLSyntaxNode *createSyntaxTree(SSchema *pSchema, int32_t numOfCols, cha
}
// get the operator of expr
uint8_t optr = getBinaryExprOptr(&t0);
uint8_t optr = getBinaryExprOptr(&t0);
if (optr == 0) {
pError("not support binary operator:%d", t0.type);
tSQLSyntaxNodeDestroy(pLeft, NULL);
@ -326,7 +326,7 @@ static tSQLSyntaxNode *createSyntaxTree(SSchema *pSchema, int32_t numOfCols, cha
pn->colId = -1;
return pn;
} else {
uint8_t localOptr = getBinaryExprOptr(&t0);
uint8_t localOptr = getBinaryExprOptr(&t0);
if (localOptr == 0) {
pError("not support binary operator:%d", t0.type);
free(pBinExpr);
@ -422,17 +422,17 @@ void tSQLBinaryExprToString(tSQLBinaryExpr *pExpr, char *dst, int32_t *len) {
if (pExpr == NULL) {
*dst = 0;
*len = 0;
return;
return;
}
int32_t lhs = tSQLBinaryExprToStringImpl(pExpr->pLeft, dst, pExpr->pLeft->nodeType);
int32_t lhs = tSQLBinaryExprToStringImpl(pExpr->pLeft, dst, pExpr->pLeft->nodeType);
dst += lhs;
*len = lhs;
char *start = tSQLOptrToString(pExpr->nSQLBinaryOptr, dst);
char *start = tSQLOptrToString(pExpr->nSQLBinaryOptr, dst);
*len += (start - dst);
*len += tSQLBinaryExprToStringImpl(pExpr->pRight, start, pExpr->pRight->nodeType);
*len += tSQLBinaryExprToStringImpl(pExpr->pRight, start, pExpr->pRight->nodeType);
}
static void UNUSED_FUNC destroySyntaxTree(tSQLSyntaxNode *pNode) { tSQLSyntaxNodeDestroy(pNode, NULL); }
@ -648,7 +648,7 @@ int32_t intersect(tQueryResultset *pLeft, tQueryResultset *pRight, tQueryResults
/*
* traverse the result and apply the function to each item to check if the item is qualified or not
*/
static void tSQLListTraverseOnResult(struct tSQLBinaryExpr *pExpr, __result_filter_fn_t fp, tQueryResultset *pResult) {
static void tSQLListTraverseOnResult(struct tSQLBinaryExpr *pExpr, __result_filter_fn_t fp, tQueryResultset *pResult) {
assert(pExpr->pLeft->nodeType == TSQL_NODE_COL && pExpr->pRight->nodeType == TSQL_NODE_VALUE);
// brutal force scan the result list and check for each item in the list

136
src/client/src/tscAsync.c
View File

@ -26,19 +26,18 @@
#include "tutil.h"
#include "tnote.h"
void tscProcessFetchRow(SSchedMsg *pMsg);
void tscProcessAsyncRetrieve(void *param, TAOS_RES *tres, int numOfRows);
static void tscProcessAsyncRetrieveNextVnode(void *param, TAOS_RES *tres, int numOfRows);
static void tscProcessAsyncContinueRetrieve(void *param, TAOS_RES *tres, int numOfRows);
static void tscProcessFetchRow(SSchedMsg *pMsg);
static void tscAsyncQueryRowsForNextVnode(void *param, TAOS_RES *tres, int numOfRows);
static void tscProcessAsyncRetrieveImpl(void *param, TAOS_RES *tres, int numOfRows, void (*fp)());
/*
* proxy function to perform sequentially query&retrieve operation.
* If sql queries upon metric and two-stage merge procedure is not needed,
* it will sequentially query&retrieve data for all vnodes in pCmd->pMetricMeta
* Proxy function to perform sequentially query&retrieve operation.
* If sql queries upon a super table and two-stage merge procedure is not involved (when employ the projection
* query), it will sequentially query&retrieve data for all vnodes
*/
static void tscProcessAsyncFetchRowsProxy(void *param, TAOS_RES *tres, int numOfRows);
static void tscProcessAsyncFetchSingleRowProxy(void *param, TAOS_RES *tres, int numOfRows);
// TODO return the correct error code to client in tscQueueAsyncError
void taos_query_a(TAOS *taos, const char *sqlstr, void (*fp)(void *, TAOS_RES *, int), void *param) {
@ -118,38 +117,23 @@ static void tscProcessAsyncFetchRowsProxy(void *param, TAOS_RES *tres, int numOf
SSqlRes *pRes = &pSql->res;
SSqlCmd *pCmd = &pSql->cmd;
SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(pCmd, pCmd->clauseIndex);
if (numOfRows == 0) {
if (hasMoreVnodesToTry(pSql)) { // sequentially retrieve data from remain vnodes.
tscTryQueryNextVnode(pSql, tscAsyncQueryRowsForNextVnode);
} else {
/*
* 1. has reach the limitation
* 2. no remain virtual nodes to be retrieved anymore
*/
(*pSql->fetchFp)(param, pSql, 0);
}
return;
}
// sequentially retrieve data from remain vnodes first, query vnode specified by vnodeIdx
if (numOfRows == 0 && tscProjectionQueryOnSTable(pQueryInfo, 0)) {
// vnode is denoted by vnodeIdx, continue to query vnode specified by vnodeIdx
SMeterMetaInfo* pMeterMetaInfo = tscGetMeterMetaInfoFromQueryInfo(pQueryInfo, 0);
assert(pMeterMetaInfo->vnodeIndex >= 0);
/* reach the maximum number of output rows, abort */
if (pCmd->globalLimit > 0 && pRes->numOfTotal >= pCmd->globalLimit) {
(*pSql->fetchFp)(param, tres, 0);
return;
}
/* update the limit value according to current retrieval results */
pQueryInfo->limit.limit = pCmd->globalLimit - pRes->numOfTotal;
pQueryInfo->limit.offset = pRes->offset;
if ((++(pMeterMetaInfo->vnodeIndex)) < pMeterMetaInfo->pMetricMeta->numOfVnodes) {
tscTrace("%p retrieve data from next vnode:%d", pSql, pMeterMetaInfo->vnodeIndex);
pSql->cmd.command = TSDB_SQL_SELECT; // reset flag to launch query first.
tscResetForNextRetrieve(pRes);
pSql->fp = tscProcessAsyncRetrieveNextVnode;
tscProcessSql(pSql);
return;
}
} else { // localreducer has handle this situation
if (pCmd->command != TSDB_SQL_RETRIEVE_METRIC) {
pRes->numOfTotal += pRes->numOfRows;
}
// local reducer has handle this situation during super table non-projection query.
if (pCmd->command != TSDB_SQL_RETRIEVE_METRIC) {
pRes->numOfTotal += pRes->numOfRows;
}
(*pSql->fetchFp)(param, tres, numOfRows);
@ -185,14 +169,18 @@ static void tscProcessAsyncRetrieveImpl(void *param, TAOS_RES *tres, int numOfRo
}
/*
* retrieve callback for fetch rows proxy. It serves as the callback function of querying vnode
* retrieve callback for fetch rows proxy.
* The below two functions both serve as the callback function of query virtual node.
* query callback first, and then followed by retrieve callback
*/
static void tscProcessAsyncRetrieveNextVnode(void *param, TAOS_RES *tres, int numOfRows) {
static void tscAsyncQueryRowsForNextVnode(void *param, TAOS_RES *tres, int numOfRows) {
// query completed, continue to retrieve
tscProcessAsyncRetrieveImpl(param, tres, numOfRows, tscProcessAsyncFetchRowsProxy);
}
static void tscProcessAsyncContinueRetrieve(void *param, TAOS_RES *tres, int numOfRows) {
tscProcessAsyncRetrieveImpl(param, tres, numOfRows, tscProcessAsyncRetrieve);
void tscAsyncQuerySingleRowForNextVnode(void *param, TAOS_RES *tres, int numOfRows) {
// query completed, continue to retrieve
tscProcessAsyncRetrieveImpl(param, tres, numOfRows, tscProcessAsyncFetchSingleRowProxy);
}
void taos_fetch_rows_a(TAOS_RES *taosa, void (*fp)(void *, TAOS_RES *, int), void *param) {
@ -247,11 +235,15 @@ void taos_fetch_row_a(TAOS_RES *taosa, void (*fp)(void *, TAOS_RES *, TAOS_ROW),
pSql->fetchFp = fp;
pSql->param = param;
if (pRes->row >= pRes->numOfRows) {
tscResetForNextRetrieve(pRes);
pSql->fp = tscProcessAsyncRetrieve;
pCmd->command = (pCmd->command > TSDB_SQL_MGMT) ? TSDB_SQL_RETRIEVE : TSDB_SQL_FETCH;
pSql->fp = tscProcessAsyncFetchSingleRowProxy;
if (pCmd->command != TSDB_SQL_RETRIEVE_METRIC && pCmd->command < TSDB_SQL_LOCAL) {
pCmd->command = (pCmd->command > TSDB_SQL_MGMT) ? TSDB_SQL_RETRIEVE : TSDB_SQL_FETCH;
}
tscProcessSql(pSql);
} else {
SSchedMsg schedMsg;
@ -263,49 +255,31 @@ void taos_fetch_row_a(TAOS_RES *taosa, void (*fp)(void *, TAOS_RES *, TAOS_ROW),
}
}
void tscProcessAsyncRetrieve(void *param, TAOS_RES *tres, int numOfRows) {
void tscProcessAsyncFetchSingleRowProxy(void *param, TAOS_RES *tres, int numOfRows) {
SSqlObj *pSql = (SSqlObj *)tres;
SSqlRes *pRes = &pSql->res;
SSqlCmd *pCmd = &pSql->cmd;
SQueryInfo *pQueryInfo = tscGetQueryInfoDetail(pCmd, pCmd->clauseIndex);
if (numOfRows == 0) {
// sequentially retrieve data from remain vnodes.
if (tscProjectionQueryOnSTable(pQueryInfo, 0)) {
/*
* vnode is denoted by vnodeIdx, continue to query vnode specified by vnodeIdx till all vnode have been retrieved
*/
SMeterMetaInfo* pMeterMetaInfo = tscGetMeterMetaInfoFromQueryInfo(pQueryInfo, 0);
assert(pMeterMetaInfo->vnodeIndex >= 0);
/* reach the maximum number of output rows, abort */
if (pCmd->globalLimit > 0 && pRes->numOfTotal >= pCmd->globalLimit) {
(*pSql->fetchFp)(pSql->param, pSql, NULL);
return;
}
/* update the limit value according to current retrieval results */
SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(pCmd, pCmd->clauseIndex);
pQueryInfo->limit.limit = pCmd->globalLimit - pRes->numOfTotal;
if ((++pMeterMetaInfo->vnodeIndex) <= pMeterMetaInfo->pMetricMeta->numOfVnodes) {
pSql->cmd.command = TSDB_SQL_SELECT; // reset flag to launch query first.
tscResetForNextRetrieve(pRes);
pSql->fp = tscProcessAsyncContinueRetrieve;
tscProcessSql(pSql);
return;
}
if (hasMoreVnodesToTry(pSql)) { // sequentially retrieve data from remain vnodes.
tscTryQueryNextVnode(pSql, tscAsyncQuerySingleRowForNextVnode);
} else {
/*
* 1. has reach the limitation
* 2. no remain virtual nodes to be retrieved anymore
*/
(*pSql->fetchFp)(pSql->param, pSql, NULL);
}
} else {
for (int i = 0; i < pCmd->numOfCols; ++i)
pRes->tsrow[i] = TSC_GET_RESPTR_BASE(pRes, pQueryInfo, i, pQueryInfo->order) + pRes->bytes[i] * pRes->row;
pRes->row++;
(*pSql->fetchFp)(pSql->param, pSql, pSql->res.tsrow);
return;
}
for (int i = 0; i < pCmd->numOfCols; ++i)
pRes->tsrow[i] = TSC_GET_RESPTR_BASE(pRes, pQueryInfo, i, pQueryInfo->order) + pRes->bytes[i] * pRes->row;
pRes->row++;
(*pSql->fetchFp)(pSql->param, pSql, pSql->res.tsrow);
}
void tscProcessFetchRow(SSchedMsg *pMsg) {
@ -314,12 +288,12 @@ void tscProcessFetchRow(SSchedMsg *pMsg) {
SSqlCmd *pCmd = &pSql->cmd;
SQueryInfo *pQueryInfo = tscGetQueryInfoDetail(pCmd, pCmd->clauseIndex);
assert(pCmd->numOfCols == pQueryInfo->fieldsInfo.numOfOutputCols);
for (int i = 0; i < pCmd->numOfCols; ++i)
for (int i = 0; i < pCmd->numOfCols; ++i) {
pRes->tsrow[i] = TSC_GET_RESPTR_BASE(pRes, pQueryInfo, i, pQueryInfo->order) + pRes->bytes[i] * pRes->row;
}
pRes->row++;
(*pSql->fetchFp)(pSql->param, pSql, pRes->tsrow);
}

124
src/client/src/tscJoinProcess.c
View File

@ -164,8 +164,7 @@ static int64_t doTSBlockIntersect(SSqlObj* pSql, SJoinSubquerySupporter* pSuppor
}
// todo handle failed to create sub query
SJoinSubquerySupporter* tscCreateJoinSupporter(SSqlObj* pSql, SSubqueryState* pState,
/*int32_t* numOfComplete, int32_t* gc,*/ int32_t index) {
SJoinSubquerySupporter* tscCreateJoinSupporter(SSqlObj* pSql, SSubqueryState* pState, int32_t index) {
SJoinSubquerySupporter* pSupporter = calloc(1, sizeof(SJoinSubquerySupporter));
if (pSupporter == NULL) {
return NULL;
@ -175,13 +174,15 @@ SJoinSubquerySupporter* tscCreateJoinSupporter(SSqlObj* pSql, SSubqueryState* pS
pSupporter->pState = pState;
pSupporter->subqueryIndex = index;
SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(&pSql->cmd, 0);
SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(&pSql->cmd, pSql->cmd.clauseIndex);
pSupporter->interval = pQueryInfo->nAggTimeInterval;
pSupporter->limit = pQueryInfo->limit;
SMeterMetaInfo* pMeterMetaInfo = tscGetMeterMetaInfo(&pSql->cmd, 0, index);
SMeterMetaInfo* pMeterMetaInfo = tscGetMeterMetaInfo(&pSql->cmd, pSql->cmd.clauseIndex, index);
pSupporter->uid = pMeterMetaInfo->pMeterMeta->uid;
assert (pSupporter->uid != 0);
getTmpfilePath("join-", pSupporter->path);
pSupporter->f = fopen(pSupporter->path, "w");
@ -235,38 +236,48 @@ bool needSecondaryQuery(SQueryInfo* pQueryInfo) {
int32_t tscLaunchSecondSubquery(SSqlObj* pSql) {
int32_t numOfSub = 0;
SJoinSubquerySupporter* pSupporter = NULL;
/*
* If the columns are not involved in the final select clause, the secondary query will not be launched
* for the subquery.
*/
SSubqueryState* pState = NULL;
for (int32_t i = 0; i < pSql->numOfSubs; ++i) {
pSupporter = pSql->pSubs[i]->param;
pSupporter->pState->numOfCompleted = 0;
/*
* If the columns are not involved in the final select clause, the secondary query will not be launched
* for the subquery.
*/
if (pSupporter->exprsInfo.numOfExprs > 0) {
++numOfSub;
}
}
assert(numOfSub > 0);
// scan all subquery, if one sub query has only ts, ignore it
tscTrace(
"%p start to launch secondary subqueries, total:%d, only:%d needs to query, others are not retrieve in "
"select clause",
pSql, pSql->numOfSubs, numOfSub);
tscTrace("%p start to launch secondary subqueries, total:%d, only:%d needs to query, others are not retrieve in "
"select clause", pSql, pSql->numOfSubs, numOfSub);
int32_t j = 0;
/*
* the subqueries that do not actually launch the secondary query to virtual node is set as completed.
*/
pState = pSupporter->pState;
pState->numOfTotal = pSql->numOfSubs;
pState->numOfCompleted = (pSql->numOfSubs - numOfSub);
for (int32_t i = 0; i < pSql->numOfSubs; ++i) {
SSqlObj* pSub = pSql->pSubs[i];
pSupporter = pSub->param;
pSupporter->pState->numOfTotal = numOfSub;
if (pSupporter->exprsInfo.numOfExprs == 0) {
tscTrace("%p subquery %d, not need to launch query, ignore it", pSql, i);
tscDestroyJoinSupporter(pSupporter);
taos_free_result(pSub);
tscFreeSqlObj(pSub);
pSql->pSubs[i] = NULL;
continue;
}
// todo refactor to avoid the memory problem handling
SSqlObj* pNew = createSubqueryObj(pSql, (int16_t)i, tscJoinQueryCallback, pSupporter, NULL);
if (pNew == NULL) {
pSql->numOfSubs = i; // revise the number of subquery
@ -279,7 +290,8 @@ int32_t tscLaunchSecondSubquery(SSqlObj* pSql) {
tscClearSubqueryInfo(&pNew->cmd);
pSql->pSubs[j++] = pNew;
pSql->pSubs[i] = pNew;
SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(&pNew->cmd, 0);
SQueryInfo* pSubQueryInfo = tscGetQueryInfoDetail(&pSub->cmd, 0);
@ -307,6 +319,7 @@ int32_t tscLaunchSecondSubquery(SSqlObj* pSql) {
// todo refactor function name
SQueryInfo* pNewQueryInfo = tscGetQueryInfoDetail(&pNew->cmd, 0);
assert(pNew->numOfSubs == 0 && pNew->cmd.numOfClause == 1 && pNewQueryInfo->numOfTables == 1);
tscAddTimestampColumn(pQueryInfo, TSDB_FUNC_TS, 0);
tscFieldInfoCalOffset(pNewQueryInfo);
@ -333,13 +346,16 @@ int32_t tscLaunchSecondSubquery(SSqlObj* pSql) {
#ifdef _DEBUG_VIEW
tscPrintSelectClause(&pNew->cmd, 0);
#endif
tscTrace("%p subquery:%p tableIndex:%d, vnodeIdx:%d, type:%d, transfer to ts_comp query to retrieve timestamps, "
"exprInfo:%d, colList:%d, fieldsInfo:%d, name:%s",
pSql, pNew, 0, pMeterMetaInfo->vnodeIndex, pNewQueryInfo->type,
pNewQueryInfo->exprsInfo.numOfExprs, pNewQueryInfo->colList.numOfCols,
pNewQueryInfo->fieldsInfo.numOfOutputCols, pNewQueryInfo->pMeterInfo[0]->name);
tscProcessSql(pNew);
}
// revise the number of subs
pSql->numOfSubs = j;
return 0;
}
@ -537,13 +553,35 @@ static void joinRetrieveCallback(void* param, TAOS_RES* tres, int numOfRows) {
}
}
static SJoinSubquerySupporter* tscUpdateSubqueryStatus(SSqlObj* pSql, int32_t numOfFetch) {
int32_t notInvolved = 0;
SJoinSubquerySupporter* pSupporter = NULL;
SSubqueryState* pState = NULL;
for(int32_t i = 0; i < pSql->numOfSubs; ++i) {
if (pSql->pSubs[i] == NULL) {
notInvolved++;
} else {
pSupporter = (SJoinSubquerySupporter*)pSql->pSubs[i]->param;
pState = pSupporter->pState;
}
}
pState->numOfTotal = pSql->numOfSubs;
pState->numOfCompleted = pSql->numOfSubs - numOfFetch;
return pSupporter;
}
void tscFetchDatablockFromSubquery(SSqlObj* pSql) {
int32_t numOfFetch = 0;
assert(pSql->numOfSubs >= 1);
for (int32_t i = 0; i < pSql->numOfSubs; ++i) {
if (pSql->pSubs[i] == NULL) { // this subquery does not need to involve in secondary query
continue;
}
SSqlRes *pRes = &pSql->pSubs[i]->res;
SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(&pSql->pSubs[i]->cmd, 0);
@ -562,28 +600,27 @@ void tscFetchDatablockFromSubquery(SSqlObj* pSql) {
}
if (numOfFetch <= 0) {
return ;
return;
}
// TODO multi-vnode retrieve for projection query with limitation has bugs, since the global limiation is not handled
tscTrace("%p retrieve data from %d subqueries", pSql, numOfFetch);
SJoinSubquerySupporter* pSupporter = (SJoinSubquerySupporter*)pSql->pSubs[0]->param;
pSupporter->pState->numOfTotal = numOfFetch; // wait for all subqueries completed
pSupporter->pState->numOfCompleted = 0;
SJoinSubquerySupporter* pSupporter = tscUpdateSubqueryStatus(pSql, numOfFetch);
for (int32_t i = 0; i < pSql->numOfSubs; ++i) {
SSqlObj* pSql1 = pSql->pSubs[i];
if (pSql1 == NULL) {
continue;
}
SSqlRes* pRes1 = &pSql1->res;
SSqlCmd* pCmd1 = &pSql1->cmd;
pSupporter = (SJoinSubquerySupporter*)pSql1->param;
// wait for all subqueries completed
pSupporter->pState->numOfTotal = numOfFetch;
SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(pCmd1, 0);
assert(pRes1->numOfRows >= 0 && pQueryInfo->numOfTables == 1);
SMeterMetaInfo* pMeterMetaInfo = tscGetMeterMetaInfoFromQueryInfo(pQueryInfo, 0);
@ -605,6 +642,16 @@ void tscFetchDatablockFromSubquery(SSqlObj* pSql) {
// wait for all subquery completed
tsem_wait(&pSql->rspSem);
// update the records for each subquery
for(int32_t i = 0; i < pSql->numOfSubs; ++i) {
if (pSql->pSubs[i] == NULL) {
continue;
}
SSqlRes* pRes1 = &pSql->pSubs[i]->res;
pRes1->numOfTotalInCurrentClause += pRes1->numOfRows;
}
}
// all subqueries return, set the result output index
@ -618,7 +665,7 @@ void tscSetupOutputColumnIndex(SSqlObj* pSql) {
return; // the column transfer support struct has been built
}
SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(pCmd, 0);
SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(pCmd, pCmd->clauseIndex);
pRes->pColumnIndex = calloc(1, sizeof(SColumnIndex) * pQueryInfo->fieldsInfo.numOfOutputCols);
for (int32_t i = 0; i < pQueryInfo->fieldsInfo.numOfOutputCols; ++i) {
@ -626,15 +673,15 @@ void tscSetupOutputColumnIndex(SSqlObj* pSql) {
int32_t tableIndexOfSub = -1;
for (int32_t j = 0; j < pQueryInfo->numOfTables; ++j) {
SSqlObj* pSub = pSql->pSubs[j];
SMeterMetaInfo* pMeterMetaInfo = tscGetMeterMetaInfo(&pSub->cmd, 0, 0);
SMeterMetaInfo* pMeterMetaInfo = tscGetMeterMetaInfoFromQueryInfo(pQueryInfo, j);
if (pMeterMetaInfo->pMeterMeta->uid == pExpr->uid) {
tableIndexOfSub = j;
break;
}
}
assert(tableIndexOfSub >= 0 && tableIndexOfSub < pQueryInfo->numOfTables);
SSqlCmd* pSubCmd = &pSql->pSubs[tableIndexOfSub]->cmd;
SQueryInfo* pSubQueryInfo = tscGetQueryInfoDetail(pSubCmd, 0);
@ -710,7 +757,6 @@ void tscJoinQueryCallback(void* param, TAOS_RES* tres, int code) {
if (atomic_add_fetch_32(&pSupporter->pState->numOfCompleted, 1) >= pSupporter->pState->numOfTotal) {
tscSetupOutputColumnIndex(pParentSql);
SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(&pSql->cmd, 0);
SMeterMetaInfo* pMeterMetaInfo = tscGetMeterMetaInfoFromQueryInfo(pQueryInfo, 0);
/**

12
src/client/src/tscParseInsert.c
View File

@ -989,7 +989,6 @@ int doParseInsertSql(SSqlObj *pSql, char *str) {
pMeterMetaInfo = tscAddEmptyMeterMetaInfo(pQueryInfo);
} else {
pMeterMetaInfo = tscGetMeterMetaInfoFromQueryInfo(pQueryInfo, 0);
// assert(pQueryInfo->numOfTables == 1);
}
if ((code = tscAllocPayload(pCmd, TSDB_PAYLOAD_SIZE)) != TSDB_CODE_SUCCESS) {
@ -1053,6 +1052,8 @@ int doParseInsertSql(SSqlObj *pSql, char *str) {
}
void *fp = pSql->fp;
ptrdiff_t pos = pSql->asyncTblPos - pSql->sqlstr;
if ((code = tscCheckIfCreateTable(&str, pSql)) != TSDB_CODE_SUCCESS) {
/*
* For async insert, after get the metermeta from server, the sql string will not be
@ -1062,7 +1063,7 @@ int doParseInsertSql(SSqlObj *pSql, char *str) {
*/
if (fp != NULL) {
if (TSDB_CODE_ACTION_IN_PROGRESS == code) {
tscTrace("async insert and waiting to get meter meta, then continue parse sql: %s", pSql->asyncTblPos);
tscTrace("async insert and waiting to get meter meta, then continue parse sql from offset: %" PRId64, pos);
return code;
}
@ -1277,11 +1278,8 @@ int tsParseInsertSql(SSqlObj *pSql) {
SQueryInfo *pQueryInfo = NULL;
tscGetQueryInfoDetailSafely(pCmd, pCmd->clauseIndex, &pQueryInfo);
if (sToken.type == TK_INSERT) {
TSDB_QUERY_SET_TYPE(pQueryInfo->type, TSDB_QUERY_TYPE_INSERT);
} else {
TSDB_QUERY_SET_TYPE(pQueryInfo->type, TSDB_QUERY_TYPE_IMPORT);
}
uint16_t type = (sToken.type == TK_INSERT)? TSDB_QUERY_TYPE_INSERT:TSDB_QUERY_TYPE_IMPORT;
TSDB_QUERY_SET_TYPE(pQueryInfo->type, type);
sToken = tStrGetToken(pSql->sqlstr, &index, false, 0, NULL);
if (sToken.type != TK_INTO) {

40
src/client/src/tscSQLParser.c
View File

@ -42,12 +42,6 @@ typedef struct SColumnList {
SColumnIndex ids[TSDB_MAX_COLUMNS];
} SColumnList;
typedef struct SColumnIdListRes {
SSchema* pSchema;
int32_t numOfCols;
SColumnList list;
} SColumnIdListRes;
static SSqlExpr* doAddProjectCol(SQueryInfo* pQueryInfo, int32_t outputIndex, int32_t colIdx, int32_t tableIndex);
static int32_t setShowInfo(SSqlObj* pSql, SSqlInfo* pInfo);
@ -518,6 +512,8 @@ int32_t tscToSQLCmd(SSqlObj* pSql, struct SSqlInfo* pInfo) {
if ((code = doCheckForQuery(pSql, pQuerySql, i)) != TSDB_CODE_SUCCESS) {
return code;
}
tscPrintSelectClause(pCmd, i);
}
// set the command/global limit parameters from the first subclause to the sqlcmd object
@ -1078,9 +1074,10 @@ static void extractColumnNameFromString(tSQLExprItem* pItem) {
int32_t parseSelectClause(SSqlCmd* pCmd, int32_t clauseIndex, tSQLExprList* pSelection, bool isSTable) {
assert(pSelection != NULL && pCmd != NULL);
const char* msg1 = "invalid column name/illegal column type in arithmetic expression";
const char* msg1 = "invalid column name, or illegal column type";
const char* msg2 = "functions can not be mixed up";
const char* msg3 = "not support query expression";
const char* msg4 = "columns from different table mixed up in arithmetic expression";
SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(pCmd, clauseIndex);
@ -1112,17 +1109,17 @@ int32_t parseSelectClause(SSqlCmd* pCmd, int32_t clauseIndex, tSQLExprList* pSel
} else if (pItem->pNode->nSQLOptr >= TK_PLUS && pItem->pNode->nSQLOptr <= TK_REM) {
// arithmetic function in select
SMeterMetaInfo* pMeterMetaInfo = tscGetMeterMetaInfoFromQueryInfo(pQueryInfo, 0);
SSchema* pSchema = tsGetSchema(pMeterMetaInfo->pMeterMeta);
SColumnIdListRes columnList = {.pSchema = pSchema, .numOfCols = pMeterMetaInfo->pMeterMeta->numOfColumns,
.list = {0}};
int32_t ret =
validateArithmeticSQLExpr(pItem->pNode, pQueryInfo, &columnList.list);
if (ret != TSDB_CODE_SUCCESS) {
SColumnList columnList = {0};
if (validateArithmeticSQLExpr(pItem->pNode, pQueryInfo, &columnList) != TSDB_CODE_SUCCESS) {
return invalidSqlErrMsg(pQueryInfo->msg, msg1);
}
int32_t tableIndex = columnList.ids[0].tableIndex;
for(int32_t f = 1; f < columnList.num; ++f) {
if (columnList.ids[f].tableIndex != tableIndex) {
return invalidSqlErrMsg(pQueryInfo->msg, msg4);
}
}
char arithmeticExprStr[1024] = {0};
char* p = arithmeticExprStr;
@ -1132,10 +1129,10 @@ int32_t parseSelectClause(SSqlCmd* pCmd, int32_t clauseIndex, tSQLExprList* pSel
}
// expr string is set as the parameter of function
SColumnIndex index = {0};
SColumnIndex index = {.tableIndex = tableIndex};
SSqlExpr* pExpr = tscSqlExprInsert(pQueryInfo, outputIndex, TSDB_FUNC_ARITHM, &index, TSDB_DATA_TYPE_DOUBLE,
sizeof(double), sizeof(double));
addExprParams(pExpr, arithmeticExprStr, TSDB_DATA_TYPE_BINARY, strlen(arithmeticExprStr), 0);
addExprParams(pExpr, arithmeticExprStr, TSDB_DATA_TYPE_BINARY, strlen(arithmeticExprStr), index.tableIndex);
/* todo alias name should use the original sql string */
if (pItem->aliasName != NULL) {
@ -1144,7 +1141,7 @@ int32_t parseSelectClause(SSqlCmd* pCmd, int32_t clauseIndex, tSQLExprList* pSel
strncpy(pExpr->aliasName, arithmeticExprStr, TSDB_COL_NAME_LEN);
}
insertResultField(pQueryInfo, i, &columnList.list, sizeof(double), TSDB_DATA_TYPE_DOUBLE, pExpr->aliasName);
insertResultField(pQueryInfo, i, &columnList, sizeof(double), TSDB_DATA_TYPE_DOUBLE, pExpr->aliasName);
} else {
/*
* not support such expression
@ -2883,7 +2880,7 @@ static int32_t validateSQLExpr(tSQLExpr* pExpr, SQueryInfo* pQueryInfo, SColumnL
return TSDB_CODE_INVALID_SQL;
}
pList->ids[pList->num++].columnIndex = index.columnIndex;
pList->ids[pList->num++] = index;
} else if (pExpr->nSQLOptr == TK_FLOAT && (isnan(pExpr->val.dKey) || isinf(pExpr->val.dKey))) {
return TSDB_CODE_INVALID_SQL;
} else if (pExpr->nSQLOptr >= TK_MIN && pExpr->nSQLOptr <= TK_LAST_ROW) {
@ -5142,7 +5139,8 @@ void tscPrintSelectClause(SSqlCmd* pCmd, int32_t subClauseIndex) {
for (int32_t i = 0; i < pQueryInfo->exprsInfo.numOfExprs; ++i) {
SSqlExpr* pExpr = tscSqlExprGet(pQueryInfo, i);
int32_t size = sprintf(str + offset, "%s(%d)", aAggs[pExpr->functionId].aName, pExpr->colInfo.colId);
int32_t size = sprintf(str + offset, "%s(uid:%" PRId64 ", %d)", aAggs[pExpr->functionId].aName,
pExpr->uid, pExpr->colInfo.colId);
offset += size;
if (i < pQueryInfo->exprsInfo.numOfExprs - 1) {

8
src/client/src/tscServer.c
View File

@ -725,6 +725,13 @@ int32_t tscLaunchJoinSubquery(SSqlObj *pSql, int16_t tableIndex, SJoinSubquerySu
pNewQueryInfo->colList.numOfCols++;
}
}
tscTrace("%p subquery:%p tableIndex:%d, vnodeIdx:%d, type:%d, transfer to ts_comp query to retrieve timestamps, "
"exprInfo:%d, colList:%d, fieldsInfo:%d, name:%s",
pSql, pNew, tableIndex, pMeterMetaInfo->vnodeIndex, pNewQueryInfo->type,
pNewQueryInfo->exprsInfo.numOfExprs, pNewQueryInfo->colList.numOfCols,
pNewQueryInfo->fieldsInfo.numOfOutputCols, pNewQueryInfo->pMeterInfo[0]->name);
} else {
SQueryInfo *pNewQueryInfo = tscGetQueryInfoDetail(&pNew->cmd, 0);
pNewQueryInfo->type |= TSDB_QUERY_TYPE_SUBQUERY;
@ -734,6 +741,7 @@ int32_t tscLaunchJoinSubquery(SSqlObj *pSql, int16_t tableIndex, SJoinSubquerySu
tscPrintSelectClause(&pNew->cmd, 0);
#endif
return tscProcessSql(pNew);
}

210
src/client/src/tscSql.c
View File

@ -201,7 +201,7 @@ int taos_query_imp(STscObj *pObj, SSqlObj *pSql) {
pRes->numOfRows = 1;
pRes->numOfTotal = 0;
pRes->numOfTotalInCurrentClause = 0;
pSql->asyncTblPos = NULL;
if (NULL != pSql->pTableHashList) {
taosCleanUpHashTable(pSql->pTableHashList);
@ -446,6 +446,10 @@ static bool tscHashRemainDataInSubqueryResultSet(SSqlObj *pSql) {
bool allSubqueryExhausted = true;
for (int32_t i = 0; i < pSql->numOfSubs; ++i) {
if (pSql->pSubs[i] == NULL) {
continue;
}
SSqlRes *pRes1 = &pSql->pSubs[i]->res;
SSqlCmd *pCmd1 = &pSql->pSubs[i]->cmd;
@ -456,7 +460,7 @@ static bool tscHashRemainDataInSubqueryResultSet(SSqlObj *pSql) {
/*
* if the global limitation is not reached, and current result has not exhausted, or next more vnodes are
* available, go on
* available, goes on
*/
if (pMetaInfo->vnodeIndex < pMetaInfo->pMetricMeta->numOfVnodes && pRes1->row < pRes1->numOfRows &&
(!tscHasReachLimitation(pQueryInfo1, pRes1))) {
@ -483,37 +487,25 @@ static bool tscHashRemainDataInSubqueryResultSet(SSqlObj *pSql) {
return hasData;
}
static void **tscJoinResultsetFromBuf(SSqlObj *pSql) {
static void **tscBuildResFromSubqueries(SSqlObj *pSql) {
SSqlRes *pRes = &pSql->res;
while (1) {
if (!tscHashRemainDataInSubqueryResultSet(pSql)) { // free all sub sqlobj
tscTrace("%p at least one subquery exhausted, free all other %d subqueries", pSql, pSql->numOfSubs - 1);
SSubqueryState *pState = NULL;
for (int32_t i = 0; i < pSql->numOfSubs; ++i) {
SSqlObj *pChildObj = pSql->pSubs[i];
SJoinSubquerySupporter *pSupporter = (SJoinSubquerySupporter *)pChildObj->param;
pState = pSupporter->pState;
tscDestroyJoinSupporter(pChildObj->param);
taos_free_result(pChildObj);
}
free(pState);
return NULL;
}
SQueryInfo *pQueryInfo = tscGetQueryInfoDetail(&pSql->cmd, 0);
SQueryInfo *pQueryInfo = tscGetQueryInfoDetail(&pSql->cmd, pSql->cmd.clauseIndex);
if (pRes->tsrow == NULL) {
pRes->tsrow = malloc(POINTER_BYTES * pQueryInfo->exprsInfo.numOfExprs);
}
bool success = false;
if (pSql->numOfSubs >= 2) { // do merge result
int32_t numOfTableHasRes = 0;
for (int32_t i = 0; i < pSql->numOfSubs; ++i) {
if (pSql->pSubs[i] != 0) {
numOfTableHasRes++;
}
}
if (numOfTableHasRes >= 2) { // do merge result
SSqlRes *pRes1 = &pSql->pSubs[0]->res;
SSqlRes *pRes2 = &pSql->pSubs[1]->res;
@ -528,8 +520,13 @@ static void **tscJoinResultsetFromBuf(SSqlObj *pSql) {
pRes2->row++;
}
} else { // only one subquery
SSqlRes *pRes1 = &pSql->pSubs[0]->res;
doSetResultRowData(pSql->pSubs[0]);
SSqlObj *pSub = pSql->pSubs[0];
if (pSub == NULL) {
pSub = pSql->pSubs[1];
}
SSqlRes *pRes1 = &pSub->res;
doSetResultRowData(pSub);
success = (pRes1->row++ < pRes1->numOfRows);
}
@ -543,8 +540,32 @@ static void **tscJoinResultsetFromBuf(SSqlObj *pSql) {
pRes->tsrow[i] = pRes1->tsrow[columnIndex];
}
pRes->numOfTotalInCurrentClause++;
break;
} else { // continue retrieve data from vnode
} else { // continue retrieve data from vnode
if (!tscHashRemainDataInSubqueryResultSet(pSql)) { // free all sub sqlobj
tscTrace("%p at least one subquery exhausted, free all other %d subqueries", pSql, pSql->numOfSubs - 1);
SSubqueryState *pState = NULL;
for (int32_t i = 0; i < pSql->numOfSubs; ++i) {
SSqlObj *pChildObj = pSql->pSubs[i];
if (pChildObj == NULL) {
continue;
}
SJoinSubquerySupporter *pSupporter = (SJoinSubquerySupporter *)pChildObj->param;
pState = pSupporter->pState;
tscDestroyJoinSupporter(pChildObj->param);
taos_free_result(pChildObj);
}
free(pState);
return NULL;
}
tscFetchDatablockFromSubquery(pSql);
if (pRes->code != TSDB_CODE_SUCCESS) {
return NULL;
@ -555,94 +576,6 @@ static void **tscJoinResultsetFromBuf(SSqlObj *pSql) {
return pRes->tsrow;
}
/**
* If current vnode query does not return results anymore (pRes->numOfRows == 0), try the next vnode if exists,
* in case of multi-vnode super table projection query and the result does not reach the limitation.
*/
static bool hasMoreVnodesToTry(SSqlObj *pSql) {
SSqlCmd *pCmd = &pSql->cmd;
SSqlRes *pRes = &pSql->res;
SQueryInfo *pQueryInfo = tscGetQueryInfoDetail(pCmd, pCmd->clauseIndex);
return pRes->numOfRows == 0 && tscProjectionQueryOnSTable(pQueryInfo, 0) && !tscHasReachLimitation(pQueryInfo, pRes);
}
static void tscTryQueryNextVnode(SSqlObj *pSql) {
SSqlCmd *pCmd = &pSql->cmd;
SSqlRes *pRes = &pSql->res;
SQueryInfo *pQueryInfo = tscGetQueryInfoDetail(pCmd, pCmd->clauseIndex);
/*
* no result returned from the current virtual node anymore, try the next vnode if exists
* if case of: multi-vnode super table projection query
*/
assert(pRes->numOfRows == 0 && tscProjectionQueryOnSTable(pQueryInfo, 0) && !tscHasReachLimitation(pQueryInfo, pRes));
SMeterMetaInfo *pMeterMetaInfo = tscGetMeterMetaInfoFromQueryInfo(pQueryInfo, 0);
int32_t totalVnode = pMeterMetaInfo->pMetricMeta->numOfVnodes;
while (++pMeterMetaInfo->vnodeIndex < totalVnode) {
tscTrace("%p current vnode:%d exhausted, try next:%d. total vnode:%d. current numOfRes:%d", pSql,
pMeterMetaInfo->vnodeIndex - 1, pMeterMetaInfo->vnodeIndex, totalVnode, pRes->numOfTotalInCurrentClause);
/*
* update the limit and offset value for the query on the next vnode,
* according to current retrieval results
*
* NOTE:
* if the pRes->offset is larger than 0, the start returned position has not reached yet.
* Therefore, the pRes->numOfRows, as well as pRes->numOfTotalInCurrentClause, must be 0.
* The pRes->offset value will be updated by virtual node, during query execution.
*/
if (pQueryInfo->clauseLimit >= 0) {
pQueryInfo->limit.limit = pQueryInfo->clauseLimit - pRes->numOfTotalInCurrentClause;
}
pQueryInfo->limit.offset = pRes->offset;
assert((pRes->offset >= 0 && pRes->numOfRows == 0) || (pRes->offset == 0 && pRes->numOfRows >= 0));
tscTrace("%p new query to next vnode, vnode index:%d, limit:%" PRId64 ", offset:%" PRId64 ", glimit:%" PRId64, pSql,
pMeterMetaInfo->vnodeIndex, pQueryInfo->limit.limit, pQueryInfo->limit.offset, pQueryInfo->clauseLimit);
/*
* For project query with super table join, the numOfSub is equalled to the number of all subqueries.
* Therefore, we need to reset the value of numOfSubs to be 0.
*
* For super table join with projection query, if anyone of the subquery is exhausted, the query completed.
*/
pSql->numOfSubs = 0;
pCmd->command = TSDB_SQL_SELECT;
assert(pSql->fp == NULL);
int32_t ret = tscProcessSql(pSql); // todo check for failure
if (ret != TSDB_CODE_SUCCESS) {
pSql->res.code = ret;
return;
}
// retrieve data
assert(pCmd->command == TSDB_SQL_SELECT);
pCmd->command = TSDB_SQL_FETCH;
if ((ret = tscProcessSql(pSql)) != TSDB_CODE_SUCCESS) {
pSql->res.code = ret;
return;
}
// if the result from current virtual node are empty, try next if exists. otherwise, return the results.
if (pRes->numOfRows > 0) {
break;
}
}
if (pRes->numOfRows == 0) {
tscTrace("%p all vnodes exhausted, prj query completed. total res:%d", pSql, totalVnode, pRes->numOfTotal);
}
}
TAOS_ROW taos_fetch_row_impl(TAOS_RES *res) {
SSqlObj *pSql = (SSqlObj *)res;
SSqlCmd *pCmd = &pSql->cmd;
@ -657,7 +590,7 @@ TAOS_ROW taos_fetch_row_impl(TAOS_RES *res) {
if (pRes->code == TSDB_CODE_SUCCESS) {
tscTrace("%p data from all subqueries have been retrieved to client", pSql);
return tscJoinResultsetFromBuf(pSql);
return tscBuildResFromSubqueries(pSql);
} else {
tscTrace("%p retrieve data from subquery failed, code:%d", pSql, pRes->code);
return NULL;
@ -679,7 +612,7 @@ TAOS_ROW taos_fetch_row_impl(TAOS_RES *res) {
tscProcessSql(pSql); // retrieve data from virtual node
if (hasMoreVnodesToTry(pSql)) {
tscTryQueryNextVnode(pSql);
tscTryQueryNextVnode(pSql, NULL);
}
/*
@ -702,7 +635,7 @@ TAOS_ROW taos_fetch_row(TAOS_RES *res) {
SSqlObj *pSql = (SSqlObj *)res;
SSqlCmd *pCmd = &pSql->cmd;
SSqlRes *pRes = &pSql->res;
if (pSql == NULL || pSql->signature != pSql) {
globalCode = TSDB_CODE_DISCONNECTED;
return NULL;
@ -713,23 +646,23 @@ TAOS_ROW taos_fetch_row(TAOS_RES *res) {
* instead of two-stage merge
*/
TAOS_ROW rows = taos_fetch_row_impl(res);
// current subclause is completed, try the next subclause
while (rows == NULL && pCmd->clauseIndex < pCmd->numOfClause - 1) {
SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(pCmd, pCmd->clauseIndex);
SQueryInfo *pQueryInfo = tscGetQueryInfoDetail(pCmd, pCmd->clauseIndex);
pSql->cmd.command = pQueryInfo->command;
pCmd->clauseIndex++;
assert(pSql->fp == NULL);
pRes->numOfTotal += pRes->numOfTotalInCurrentClause;
pRes->numOfTotalInCurrentClause = 0;
pRes->rspType = 0;
pSql->numOfSubs = 0;
tfree(pSql->pSubs);
tscTrace("%p try data in the next subclause:%d, total subclause:%d", pSql, pCmd->clauseIndex, pCmd->numOfClause);
tscProcessSql(pSql);
@ -744,7 +677,7 @@ int taos_fetch_block(TAOS_RES *res, TAOS_ROW *rows) {
SSqlObj *pSql = (SSqlObj *)res;
SSqlCmd *pCmd = &pSql->cmd;
SSqlRes *pRes = &pSql->res;
int nRows = 0;
if (pSql == NULL || pSql->signature != pSql) {
@ -759,26 +692,26 @@ int taos_fetch_block(TAOS_RES *res, TAOS_ROW *rows) {
// current subclause is completed, try the next subclause
while (rows == NULL && pCmd->clauseIndex < pCmd->numOfClause - 1) {
SQueryInfo* pQueryInfo = tscGetQueryInfoDetail(pCmd, pCmd->clauseIndex);
SQueryInfo *pQueryInfo = tscGetQueryInfoDetail(pCmd, pCmd->clauseIndex);
pSql->cmd.command = pQueryInfo->command;
pCmd->clauseIndex++;
pRes->numOfTotal += pRes->numOfTotalInCurrentClause;
pRes->numOfTotalInCurrentClause = 0;
pRes->rspType = 0;
pSql->numOfSubs = 0;
tfree(pSql->pSubs);
assert(pSql->fp == NULL);
tscTrace("%p try data in the next subclause:%d, total subclause:%d", pSql, pCmd->clauseIndex, pCmd->numOfClause);
tscProcessSql(pSql);
nRows = taos_fetch_block_impl(res, rows);
}
return nRows;
}
@ -822,6 +755,11 @@ void taos_free_result(TAOS_RES *res) {
// set freeFlag to 1 in retrieve message if there are un-retrieved results
SQueryInfo *pQueryInfo = tscGetQueryInfoDetail(&pSql->cmd, 0);
if (pQueryInfo == NULL) {
tscFreeSqlObjPartial(pSql);
return;
}
pQueryInfo->type = TSDB_QUERY_TYPE_FREE_RESOURCE;
SMeterMetaInfo *pMeterMetaInfo = tscGetMeterMetaInfoFromQueryInfo(pQueryInfo, 0);
@ -1041,7 +979,7 @@ int taos_validate_sql(TAOS *taos, const char *sql) {
pRes->numOfRows = 1;
pRes->numOfTotal = 0;
pRes->numOfTotalInCurrentClause = 0;
tscTrace("%p Valid SQL: %s pObj:%p", pSql, sql, pObj);
int32_t sqlLen = strlen(sql);
@ -1172,7 +1110,7 @@ int taos_load_table_info(TAOS *taos, const char *tableNameList) {
pRes->numOfTotal = 0; // the number of getting table meta from server
pRes->numOfTotalInCurrentClause = 0;
pRes->code = 0;
assert(pSql->fp == NULL);

109
src/client/src/tscUtil.c
View File

@ -1888,7 +1888,6 @@ SSqlObj* createSubqueryObj(SSqlObj* pSql, int16_t tableIndex, void (*fp)(), void
#endif
char* name = pMeterMetaInfo->name;
SMeterMetaInfo* pFinalInfo = NULL;
if (pPrevSql == NULL) {
@ -1907,13 +1906,16 @@ SSqlObj* createSubqueryObj(SSqlObj* pSql, int16_t tableIndex, void (*fp)(), void
pMeterMetaInfo->tagColumnIndex);
}
assert(pFinalInfo->pMeterMeta != NULL);
assert(pFinalInfo->pMeterMeta != NULL && pNewQueryInfo->numOfTables == 1);
if (UTIL_METER_IS_SUPERTABLE(pMeterMetaInfo)) {
assert(pFinalInfo->pMetricMeta != NULL);
}
tscTrace("%p new subquery %p, tableIndex:%d, vnodeIdx:%d, type:%d", pSql, pNew, tableIndex,
pMeterMetaInfo->vnodeIndex, pNewQueryInfo->type);
tscTrace("%p new subquery %p, tableIndex:%d, vnodeIdx:%d, type:%d, exprInfo:%d, colList:%d,"
"fieldInfo:%d, name:%s", pSql, pNew, tableIndex,
pMeterMetaInfo->vnodeIndex, pNewQueryInfo->type, pNewQueryInfo->exprsInfo.numOfExprs, pNewQueryInfo->colList.numOfCols,
pNewQueryInfo->fieldsInfo.numOfOutputCols, pFinalInfo->name);
return pNew;
}
@ -1990,3 +1992,102 @@ bool tscHasReachLimitation(SQueryInfo* pQueryInfo, SSqlRes* pRes) {
}
char* tscGetErrorMsgPayload(SSqlCmd* pCmd) { return pCmd->payload; }
/**
* If current vnode query does not return results anymore (pRes->numOfRows == 0), try the next vnode if exists,
* in case of multi-vnode super table projection query and the result does not reach the limitation.
*/
bool hasMoreVnodesToTry(SSqlObj *pSql) {
SSqlCmd *pCmd = &pSql->cmd;
SSqlRes *pRes = &pSql->res;
SQueryInfo *pQueryInfo = tscGetQueryInfoDetail(pCmd, pCmd->clauseIndex);
return pRes->numOfRows == 0 && tscProjectionQueryOnSTable(pQueryInfo, 0) && !tscHasReachLimitation(pQueryInfo, pRes);
}
void tscTryQueryNextVnode(SSqlObj *pSql, __async_cb_func_t fp) {
SSqlCmd *pCmd = &pSql->cmd;
SSqlRes *pRes = &pSql->res;
SQueryInfo *pQueryInfo = tscGetQueryInfoDetail(pCmd, pCmd->clauseIndex);
/*
* no result returned from the current virtual node anymore, try the next vnode if exists
* if case of: multi-vnode super table projection query
*/
assert(pRes->numOfRows == 0 && tscProjectionQueryOnSTable(pQueryInfo, 0) && !tscHasReachLimitation(pQueryInfo, pRes));
SMeterMetaInfo *pMeterMetaInfo = tscGetMeterMetaInfoFromQueryInfo(pQueryInfo, 0);
int32_t totalVnode = pMeterMetaInfo->pMetricMeta->numOfVnodes;
while (++pMeterMetaInfo->vnodeIndex < totalVnode) {
tscTrace("%p current vnode:%d exhausted, try next:%d. total vnode:%d. current numOfRes:%d", pSql,
pMeterMetaInfo->vnodeIndex - 1, pMeterMetaInfo->vnodeIndex, totalVnode, pRes->numOfTotalInCurrentClause);
/*
* update the limit and offset value for the query on the next vnode,
* according to current retrieval results
*
* NOTE:
* if the pRes->offset is larger than 0, the start returned position has not reached yet.
* Therefore, the pRes->numOfRows, as well as pRes->numOfTotalInCurrentClause, must be 0.
* The pRes->offset value will be updated by virtual node, during query execution.
*/
if (pQueryInfo->clauseLimit >= 0) {
pQueryInfo->limit.limit = pQueryInfo->clauseLimit - pRes->numOfTotalInCurrentClause;
}
pQueryInfo->limit.offset = pRes->offset;
assert((pRes->offset >= 0 && pRes->numOfRows == 0) || (pRes->offset == 0 && pRes->numOfRows >= 0));
tscTrace("%p new query to next vnode, vnode index:%d, limit:%" PRId64 ", offset:%" PRId64 ", glimit:%" PRId64, pSql,
pMeterMetaInfo->vnodeIndex, pQueryInfo->limit.limit, pQueryInfo->limit.offset, pQueryInfo->clauseLimit);
/*
* For project query with super table join, the numOfSub is equalled to the number of all subqueries.
* Therefore, we need to reset the value of numOfSubs to be 0.
*
* For super table join with projection query, if anyone of the subquery is exhausted, the query completed.
*/
pSql->numOfSubs = 0;
pCmd->command = TSDB_SQL_SELECT;
tscResetForNextRetrieve(pRes);
// in case of async query, set the callback function
void* fp1 = pSql->fp;
if (fp1 != NULL) {
assert(fp != NULL);
pSql->fp = fp;
}
int32_t ret = tscProcessSql(pSql); // todo check for failure
if (fp != NULL) {
return;
}
if (ret != TSDB_CODE_SUCCESS) {
pSql->res.code = ret;
return;
}
// retrieve data
assert(pCmd->command == TSDB_SQL_SELECT);
pCmd->command = TSDB_SQL_FETCH;
if ((ret = tscProcessSql(pSql)) != TSDB_CODE_SUCCESS) {
pSql->res.code = ret;
return;
}
// if the result from current virtual node are empty, try next if exists. otherwise, return the results.
if (pRes->numOfRows > 0) {
break;
}
}
if (pRes->numOfRows == 0) {
tscTrace("%p all vnodes exhausted, prj query completed. total res:%d", pSql, totalVnode, pRes->numOfTotal);
}
}