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Merge pull request #20206 from taosdata/fix/main_wxy 

fix: a plan error of set operator subquery
This commit is contained in:
Xiaoyu Wang 2023-02-28 19:33:56 +08:00 committed by GitHub
parent 60f24a5c3b ca624678b1
commit b855816780
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 74 additions and 5 deletions
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79
source/libs/parser/src/parCalcConst.c
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@ -320,6 +320,79 @@ static int32_t calcConstInsert(SCalcConstContext* pCxt, SInsertStmt* pInsert) {
return code;
}
static SNodeList* getChildProjection(SNode* pStmt) {
switch (nodeType(pStmt)) {
case QUERY_NODE_SELECT_STMT:
return ((SSelectStmt*)pStmt)->pProjectionList;
case QUERY_NODE_SET_OPERATOR:
return ((SSetOperator*)pStmt)->pProjectionList;
default:
break;
}
return NULL;
}
static void eraseSetOpChildProjection(SSetOperator* pSetOp, int32_t index) {
SNodeList* pLeftProjs = getChildProjection(pSetOp->pLeft);
nodesListErase(pLeftProjs, nodesListGetCell(pLeftProjs, index));
SNodeList* pRightProjs = getChildProjection(pSetOp->pRight);
nodesListErase(pRightProjs, nodesListGetCell(pRightProjs, index));
}
typedef struct SNotRefByOrderByCxt {
SColumnNode* pCol;
bool hasThisCol;
} SNotRefByOrderByCxt;
static EDealRes notRefByOrderByImpl(SNode* pNode, void* pContext) {
if (QUERY_NODE_COLUMN == nodeType(pNode)) {
SNotRefByOrderByCxt* pCxt = (SNotRefByOrderByCxt*)pContext;
if (nodesEqualNode((SNode*)pCxt->pCol, pNode)) {
pCxt->hasThisCol = true;
return DEAL_RES_END;
}
}
return DEAL_RES_CONTINUE;
}
static bool notRefByOrderBy(SColumnNode* pCol, SNodeList* pOrderByList) {
SNotRefByOrderByCxt cxt = {.pCol = pCol, .hasThisCol = false};
nodesWalkExprs(pOrderByList, notRefByOrderByImpl, &cxt);
return !cxt.hasThisCol;
}
static int32_t calcConstSetOpProjections(SCalcConstContext* pCxt, SSetOperator* pSetOp, bool subquery) {
int32_t index = 0;
SNode* pProj = NULL;
WHERE_EACH(pProj, pSetOp->pProjectionList) {
if (subquery && notRefByOrderBy((SColumnNode*)pProj, pSetOp->pOrderByList) && isUselessCol((SExprNode*)pProj)) {
ERASE_NODE(pSetOp->pProjectionList);
eraseSetOpChildProjection(pSetOp, index);
continue;
}
++index;
WHERE_NEXT;
}
if (0 == LIST_LENGTH(pSetOp->pProjectionList)) {
return nodesListStrictAppend(pSetOp->pProjectionList, createConstantValue());
}
return TSDB_CODE_SUCCESS;
}
static int32_t calcConstSetOperator(SCalcConstContext* pCxt, SSetOperator* pSetOp, bool subquery) {
int32_t code = calcConstSetOpProjections(pCxt, pSetOp, subquery);
if (TSDB_CODE_SUCCESS == code) {
code = calcConstQuery(pCxt, pSetOp->pLeft, false);
}
if (TSDB_CODE_SUCCESS == code) {
code = calcConstQuery(pCxt, pSetOp->pRight, false);
}
if (TSDB_CODE_SUCCESS == code) {
code = calcConstList(pSetOp->pOrderByList);
}
return code;
}
static int32_t calcConstQuery(SCalcConstContext* pCxt, SNode* pStmt, bool subquery) {
int32_t code = TSDB_CODE_SUCCESS;
switch (nodeType(pStmt)) {
@ -330,11 +403,7 @@ static int32_t calcConstQuery(SCalcConstContext* pCxt, SNode* pStmt, bool subque
code = calcConstQuery(pCxt, ((SExplainStmt*)pStmt)->pQuery, subquery);
break;
case QUERY_NODE_SET_OPERATOR: {
SSetOperator* pSetOp = (SSetOperator*)pStmt;
code = calcConstQuery(pCxt, pSetOp->pLeft, false);
if (TSDB_CODE_SUCCESS == code) {
code = calcConstQuery(pCxt, pSetOp->pRight, false);
}
code = calcConstSetOperator(pCxt, (SSetOperator*)pStmt, subquery);
break;
}
case QUERY_NODE_DELETE_STMT: