xxq250
/
homework-jianmu
1
0
Fork 0
Code Issues Pull Requests 1 Actions Packages Projects Releases Wiki Activity

Merge pull request #17475 from taosdata/feature/3_liaohj_wxy 

fix: cache inapplicability
This commit is contained in:
Xiaoyu Wang 2022-10-19 15:59:29 +08:00 committed by GitHub
parent 325712fdf9 35e829dc28
commit 7161ca89cc
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 18 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
source/libs/planner/src/planOptimizer.c
View File

@ -2155,6 +2155,22 @@ static bool lastRowScanOptHasTag(SNode* pExpr) {
return hasTag;
}
static bool hasSuitableCache(int8_t cacheLastMode, bool hasLastRow, bool hasLast) {
switch (cacheLastMode) {
case TSDB_CACHE_MODEL_NONE:
return false;
case TSDB_CACHE_MODEL_LAST_ROW:
return hasLastRow;
case TSDB_CACHE_MODEL_LAST_VALUE:
return hasLast;
case TSDB_CACHE_MODEL_BOTH:
return true;
default:
break;
}
return false;
}
static bool lastRowScanOptMayBeOptimized(SLogicNode* pNode) {
if (QUERY_NODE_LOGIC_PLAN_AGG != nodeType(pNode) || 1 != LIST_LENGTH(pNode->pChildren) ||
QUERY_NODE_LOGIC_PLAN_SCAN != nodeType(nodesListGetNode(pNode->pChildren, 0))) {
@ -2165,7 +2181,8 @@ static bool lastRowScanOptMayBeOptimized(SLogicNode* pNode) {
SScanLogicNode* pScan = (SScanLogicNode*)nodesListGetNode(pNode->pChildren, 0);
// Only one of LAST and LASTROW can appear
if (pAgg->hasLastRow == pAgg->hasLast || NULL != pAgg->pGroupKeys || NULL != pScan->node.pConditions ||
0 == pScan->cacheLastMode || IS_TSWINDOW_SPECIFIED(pScan->scanRange)) {
!hasSuitableCache(pScan->cacheLastMode, pAgg->hasLastRow, pAgg->hasLast) ||
IS_TSWINDOW_SPECIFIED(pScan->scanRange)) {
return false;
}