diff options
| author | Tom Lane <tgl@sss.pgh.pa.us> | 2014-10-17 22:33:14 -0400 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2014-10-17 22:33:14 -0400 |
| commit | 96139cfbbc1581d6f17b601b37ce9dda88d36322 (patch) | |
| tree | 2b20b96eb17793f65bc42a5714caa4cd312a2b88 | |
| parent | 0c9391e529c47716274a02e799b587ad108004f7 (diff) | |
Avoid core dump in _outPathInfo() for Path without a parent RelOptInfo.
Nearly all Paths have parents, but a ResultPath representing an empty FROM
clause does not. Avoid a core dump in such cases. I believe this is only
a hazard for debugging usage, not for production, else we'd have heard
about it before. Nonetheless, back-patch to 9.1 where the troublesome code
was introduced. Noted while poking at bug #11703.
| -rw-r--r-- | src/backend/nodes/outfuncs.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/backend/nodes/outfuncs.c b/src/backend/nodes/outfuncs.c index cd6c275c639..01b2d6d2d4a 100644 --- a/src/backend/nodes/outfuncs.c +++ b/src/backend/nodes/outfuncs.c @@ -1466,7 +1466,10 @@ _outPathInfo(StringInfo str, Path *node) { WRITE_ENUM_FIELD(pathtype, NodeTag); appendStringInfo(str, " :parent_relids "); - _outBitmapset(str, node->parent->relids); + if (node->parent) + _outBitmapset(str, node->parent->relids); + else + _outBitmapset(str, NULL); WRITE_FLOAT_FIELD(startup_cost, "%.2f"); WRITE_FLOAT_FIELD(total_cost, "%.2f"); WRITE_NODE_FIELD(pathkeys); |