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In the push-down optimization, do not substitute columns that have previously

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been identified as being constant by the propagate-constants optimization.
Fix for ticket [51166be0159fd2ce]

FossilOrigin-Name: 70c44811d12f540d4ec1c29dedbe999cf79b82e326a8712ae2fa0725d6bd8a65
This commit is contained in:
drh
2020-04-04 00:15:54 +00:00
parent c59b4acf5d
commit 2e52a9c611
5 changed files with 33 additions and 11 deletions
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5
src/select.c
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@@ -3476,7 +3476,10 @@ static Expr *substExpr(
){
pExpr->iRightJoinTable = pSubst->iNewTable;
}
if( pExpr->op==TK_COLUMN && pExpr->iTable==pSubst->iTable ){
if( pExpr->op==TK_COLUMN
&& pExpr->iTable==pSubst->iTable
&& !ExprHasProperty(pExpr, EP_FixedCol)
){
if( pExpr->iColumn<0 ){
pExpr->op = TK_NULL;
}else{