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Fix buggy recursion in flatten_rtes_walker().

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Must save-and-restore the context we are modifying.
Oversight in commit a61b1f748.

Tender Wang

Discussion: https://postgr.es/m/CAHewXNnnNySD_YcKNuFpQDV2gxWA7_YLWqHmYVcyoOYxn8kY2A@mail.gmail.com
Discussion: https://postgr.es/m/20230212233711.GA1316@telsasoft.com
This commit is contained in:
Tom Lane
2023-02-13 12:19:58 -05:00
parent f50f029c49
commit c7468c73f7
3 changed files with 27 additions and 4 deletions
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13
src/backend/optimizer/plan/setrefs.c
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@ -536,11 +536,16 @@ flatten_rtes_walker(Node *node, flatten_rtes_walker_context *cxt)
* Recurse into subselects. Must update cxt->query to this query so
* that the rtable and rteperminfos correspond with each other.
*/
Query *save_query = cxt->query;
bool result;
cxt->query = (Query *) node;
return query_tree_walker((Query *) node,
flatten_rtes_walker,
(void *) cxt,
QTW_EXAMINE_RTES_BEFORE);
result = query_tree_walker((Query *) node,
flatten_rtes_walker,
(void *) cxt,
QTW_EXAMINE_RTES_BEFORE);
cxt->query = save_query;
return result;
}
return expression_tree_walker(node, flatten_rtes_walker,
(void *) cxt);