diff options
| author | Tom Lane <tgl@sss.pgh.pa.us> | 2014-10-17 22:33:10 -0400 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2014-10-17 22:33:10 -0400 |
| commit | 6de1b53458a7d74276b087d12d34798bc5f3226b (patch) | |
| tree | b80c2dd9d1e83d8cd9229bffc8bf90f5c015aeac /src/backend/nodes/outfuncs.c | |
| parent | 787e20bd4a33fd076cad1fd3ec58c644a14d8390 (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.
Diffstat (limited to 'src/backend/nodes/outfuncs.c')
| -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 a08d9bbc0c9..12c8fed1ab9 100644 --- a/src/backend/nodes/outfuncs.c +++ b/src/backend/nodes/outfuncs.c @@ -1470,7 +1470,10 @@ _outPathInfo(StringInfo str, const 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); appendStringInfo(str, " :required_outer "); if (node->param_info) _outBitmapset(str, node->param_info->ppi_req_outer); |