28 lines
937 B
Diff
28 lines
937 B
Diff
From 1668926bc3c7da0b2870a60382b179a0e3edb5de Mon Sep 17 00:00:00 2001
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From: Ondrej Dubaj <odubaj@redhat.com>
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Date: Thu, 26 Mar 2020 08:14:29 +0100
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Subject: [PATCH] Do not allow the constant-propagation optimization to apple
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to ON/USING clause terms as it does not help and it might cause downstream
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problems.
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---
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src/select.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/src/select.c b/src/select.c
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index bbd13a4..88a43df 100644
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--- a/src/select.c
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+++ b/src/select.c
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@@ -4171,7 +4171,7 @@ static int propagateConstantExprRewrite(Walker *pWalker, Expr *pExpr){
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int i;
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WhereConst *pConst;
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if( pExpr->op!=TK_COLUMN ) return WRC_Continue;
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- if( ExprHasProperty(pExpr, EP_FixedCol) ) return WRC_Continue;
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+ if( ExprHasProperty(pExpr, EP_FixedCol|EP_FromJoin) ) return WRC_Continue;
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pConst = pWalker->u.pConst;
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for(i=0; i<pConst->nConst; i++){
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Expr *pColumn = pConst->apExpr[i*2];
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--
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2.24.1
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