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Ensure the EXISTS->IN transformation preserves the collation sequence of the comparison operation.

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FossilOrigin-Name: a373baae12c914e48fd84de77998e301fdd3da43b06b9d64ac24a14418ed48cd
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dan
2021-01-15 15:32:09 +00:00
parent 9d326d6793
commit e8f7fcf6f4
4 changed files with 93 additions and 11 deletions
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8
src/whereexpr.c
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@@ -1175,12 +1175,18 @@ static void exprAnalyzeExists(
pInLhs = exprAnalyzeExistsFindEq(pSel, &pEq, &ppAnd);
assert( pInLhs && pEq );
assert( pEq==pSel->pWhere || ppAnd );
if( pInLhs==pEq->pLeft ){
pRet = pEq->pRight;
}else{
CollSeq *p = sqlite3ExprCompareCollSeq(pParse, pEq);
pInLhs = sqlite3ExprAddCollateString(pParse, pInLhs, p?p->zName:"BINARY");
pRet = pEq->pLeft;
}
assert( pDup->pLeft==0 );
pDup->op = TK_IN;
pDup->pLeft = pInLhs;
pDup->flags &= ~EP_VarSelect;
pRet = (pInLhs==pEq->pLeft) ? pEq->pRight : pEq->pLeft;
pSel->pEList = sqlite3ExprListAppend(pParse, 0, pRet);
pEq->pLeft = 0;
pEq->pRight = 0;