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Improved rebustness in sqlite3ExprListDup() when it contains a vector assignment

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from an UPDATE where the initial term is omitted.  This can happen during a
UNION ALL query flattening while processing a virtual table update in which
the first term of the vector is repeated.
[forum:/forumpost/16ca0e9f32|Forum post 16ca0e9f32].

FossilOrigin-Name: 2547cfe38f8fb35109b3fc5bdfada387fe4b2b8a304156b704ab7f03f1f71198
This commit is contained in:
drh
2021-07-05 02:40:29 +00:00
parent 10f08270e1
commit e46292a920
6 changed files with 39 additions and 24 deletions
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5
src/treeview.c
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@@ -699,8 +699,9 @@ void sqlite3TreeViewExpr(TreeView *pView, const Expr *pExpr, u8 moreToFollow){
break;
}
case TK_SELECT_COLUMN: {
sqlite3TreeViewLine(pView, "SELECT-COLUMN %d of [0..%d]",
pExpr->iColumn, pExpr->iTable-1);
sqlite3TreeViewLine(pView, "SELECT-COLUMN %d of [0..%d]%s",
pExpr->iColumn, pExpr->iTable-1,
pExpr->pRight==pExpr->pLeft ? " (SELECT-owner)" : "");
sqlite3TreeViewSelect(pView, pExpr->pLeft->x.pSelect, 0);
break;
}