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fix: rewrite count(*) to count(1) for temp table

This commit is contained in:
slzhou 2023-06-06 07:39:14 +08:00
parent b437024eca
commit beb2b7b467
1 changed files with 22 additions and 2 deletions
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24
source/libs/parser/src/parTranslater.c
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@ -1352,13 +1352,33 @@ static bool isCountStar(SFunctionNode* pFunc) {
return (QUERY_NODE_COLUMN == nodeType(pPara) && 0 == strcmp(((SColumnNode*)pPara)->colName, "*"));
}
static int32_t rewriteCountStarAsCount1(STranslateContext* pCxt, SFunctionNode* pCount) {
int32_t code = TSDB_CODE_SUCCESS;
SValueNode* pVal = (SValueNode*)nodesMakeNode(QUERY_NODE_VALUE);
if (NULL == pVal) {
return TSDB_CODE_OUT_OF_MEMORY;
}
pVal->node.resType.type = TSDB_DATA_TYPE_INT;
pVal->node.resType.bytes = tDataTypes[TSDB_DATA_TYPE_INT].bytes;
const int32_t val = 1;
nodesSetValueNodeValue(pVal, (void*)&val);
pVal->translate = true;
nodesListErase(pCount->pParameterList, nodesListGetCell(pCount->pParameterList, 0));
code = nodesListAppend(pCount->pParameterList, (SNode*)pVal);
return code;
}
// count(*) is rewritten as count(ts) for scannning optimization
static int32_t rewriteCountStar(STranslateContext* pCxt, SFunctionNode* pCount) {
SColumnNode* pCol = (SColumnNode*)nodesListGetNode(pCount->pParameterList, 0);
STableNode* pTable = NULL;
int32_t code = findTable(pCxt, ('\0' == pCol->tableAlias[0] ? NULL : pCol->tableAlias), &pTable);
if (TSDB_CODE_SUCCESS == code && QUERY_NODE_REAL_TABLE == nodeType(pTable)) {
setColumnInfoBySchema((SRealTableNode*)pTable, ((SRealTableNode*)pTable)->pMeta->schema, -1, pCol);
if (TSDB_CODE_SUCCESS == code) {
if (QUERY_NODE_REAL_TABLE == nodeType(pTable)) {
setColumnInfoBySchema((SRealTableNode*)pTable, ((SRealTableNode*)pTable)->pMeta->schema, -1, pCol);
} else {
code = rewriteCountStarAsCount1(pCxt, pCount);
}
}
return code;
}