diff options
Diffstat (limited to 'src/expr.c')
-rw-r--r-- | src/expr.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/src/expr.c b/src/expr.c index 79889bdd7..2c00bb498 100644 --- a/src/expr.c +++ b/src/expr.c @@ -1249,6 +1249,18 @@ void sqlite3ExprDelete(sqlite3 *db, Expr *p){ if( p ) sqlite3ExprDeleteNN(db, p); } +/* +** Clear both elements of an OnOrUsing object +*/ +void sqlite3ClearOnOrUsing(sqlite3 *db, OnOrUsing *p){ + if( p==0 ){ + /* Nothing to clear */ + }else if( p->pOn ){ + sqlite3ExprDeleteNN(db, p->pOn); + }else if( p->pUsing ){ + sqlite3IdListDelete(db, p->pUsing); + } +} /* ** Arrange to cause pExpr to be deleted when the pParse is deleted. @@ -1671,8 +1683,12 @@ SrcList *sqlite3SrcListDup(sqlite3 *db, const SrcList *p, int flags){ pTab->nTabRef++; } pNewItem->pSelect = sqlite3SelectDup(db, pOldItem->pSelect, flags); - pNewItem->pOn = sqlite3ExprDup(db, pOldItem->pOn, flags); - pNewItem->pUsing = sqlite3IdListDup(db, pOldItem->pUsing); + if( pOldItem->fg.isUsing ){ + assert( pNewItem->fg.isUsing ); + pNewItem->u3.pUsing = sqlite3IdListDup(db, pOldItem->u3.pUsing); + }else{ + pNewItem->u3.pOn = sqlite3ExprDup(db, pOldItem->u3.pOn, flags); + } pNewItem->colUsed = pOldItem->colUsed; } return pNew; |