database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-11-16 23:02:26 +03:00
Code Activity

Further improvements to codeEqualityTerm() for cases when an IN operator with

Browse Source 
a right-hand side subquery is used as a constraint that needs to be processed
by the RIGHT JOIN non-matched logic.

FossilOrigin-Name: bb2798be3fb5737827eec505db2d4c8cb510d227d98fc26ce748bf2da7e8b382
This commit is contained in:
drh
2022-04-30 00:06:52 +00:00
parent c64f0e71c1
commit a25bbaf74a
4 changed files with 33 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
src/wherecode.c
View File

@@ -610,17 +610,25 @@ static int codeEqualityTerm(
iTab = 0;
if( !ExprUseXSelect(pX) || pX->x.pSelect->pEList->nExpr==1 ){
eType = sqlite3FindInIndex(pParse, pX, IN_INDEX_LOOP, 0, 0, &iTab);
}else if( pTerm->pExpr->iTable==0 ){
sqlite3 *db = pParse->db;
pX = removeUnindexableInClauseTerms(pParse, iEq, pLoop, pX);
if( !db->mallocFailed ){
aiMap = (int*)sqlite3DbMallocZero(pParse->db, sizeof(int)*nEq);
eType = sqlite3FindInIndex(pParse, pX, IN_INDEX_LOOP, 0, aiMap, &iTab);
pTerm->pExpr->iTable = iTab;
}else{
Expr *pExpr = pTerm->pExpr;
if( pExpr->iTable==0 || !ExprHasProperty(pExpr, EP_Subrtn) ){
sqlite3 *db = pParse->db;
pX = removeUnindexableInClauseTerms(pParse, iEq, pLoop, pX);
if( !db->mallocFailed ){
aiMap = (int*)sqlite3DbMallocZero(pParse->db, sizeof(int)*nEq);
eType = sqlite3FindInIndex(pParse, pX, IN_INDEX_LOOP, 0, aiMap,&iTab);
pExpr->iTable = iTab;
pExpr->op2 = eType;
}
sqlite3ExprDelete(db, pX);
}else{
sqlite3VdbeAddOp2(v, OP_Gosub, pExpr->y.sub.regReturn,
pExpr->y.sub.iAddr);
iTab = pExpr->iTable;
eType = pExpr->op2;
}
sqlite3ExprDelete(db, pX);
pX = pTerm->pExpr;
pX = pExpr;
}
if( eType==IN_INDEX_INDEX_DESC ){