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Copy raw_parse_tree before using it 

Address citusdata/citus#922.

Fixes a segfault in PG's installcheck caused by our reuse of
raw_parse_tree when handling EXPLAIN EXECUTE.
pull/1000/head
Brian Cloutier 2016-10-27 17:18:53 +03:00 committed by Andres Freund
parent ebecd90a7e
commit 996f793d54
1 changed files with 4 additions and 1 deletions
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5
src/backend/distributed/executor/multi_utility.c
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@ -313,6 +313,7 @@ multi_ProcessUtility(Node *parsetree,
ExecuteStmt *execstmt = (ExecuteStmt *) query->utilityStmt;
PreparedStatement *entry = FetchPreparedStatement(execstmt->name, true);
CachedPlanSource *plansource = entry->plansource;
Node *parseTreeCopy;
Query *originalQuery;
/* copied from ExplainExecuteQuery, will never trigger if you used PREPARE */
@ -322,7 +323,9 @@ multi_ProcessUtility(Node *parsetree,
" cached plans")));
}
originalQuery = parse_analyze(plansource->raw_parse_tree,
parseTreeCopy = copyObject(plansource->raw_parse_tree);
originalQuery = parse_analyze(parseTreeCopy,
plansource->query_string,
plansource->param_types,
plansource->num_params);