From 1668926bc3c7da0b2870a60382b179a0e3edb5de Mon Sep 17 00:00:00 2001
From: Ondrej Dubaj <odubaj@redhat.com>
Date: Thu, 26 Mar 2020 08:14:29 +0100
Subject: [PATCH] Do not allow the constant-propagation optimization to apple
 to ON/USING clause terms as it does not help and it might cause downstream
 problems.

---
 src/select.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/select.c b/src/select.c
index bbd13a4..88a43df 100644
--- a/src/select.c
+++ b/src/select.c
@@ -4171,7 +4171,7 @@ static int propagateConstantExprRewrite(Walker *pWalker, Expr *pExpr){
   int i;
   WhereConst *pConst;
   if( pExpr->op!=TK_COLUMN ) return WRC_Continue;
-  if( ExprHasProperty(pExpr, EP_FixedCol) ) return WRC_Continue;
+  if( ExprHasProperty(pExpr, EP_FixedCol|EP_FromJoin) ) return WRC_Continue;
   pConst = pWalker->u.pConst;
   for(i=0; i<pConst->nConst; i++){
     Expr *pColumn = pConst->apExpr[i*2];
-- 
2.24.1