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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2011-10-23 00:43:45 -0400 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2011-10-23 00:43:45 -0400 |
| commit | 18661c67e96ff4a81ab3844843a73676d161db0c (patch) | |
| tree | 6cc45485bd8ffda5563a07c9c2fa477d247b7711 /src/backend/nodes/outfuncs.c | |
| parent | 8e8ac0894b196c4dd8618bca1f598f13bf5e18ea (diff) | |
| download | postgresql-18661c67e96ff4a81ab3844843a73676d161db0c.tar.gz postgresql-18661c67e96ff4a81ab3844843a73676d161db0c.zip | |
Don't trust deferred-unique indexes for join removal.
The uniqueness condition might fail to hold intra-transaction, and assuming
it does can give incorrect query results. Per report from Marti Raudsepp,
though this is not his proposed patch.
Back-patch to 9.0, where both these features were introduced. In the
released branches, add the new IndexOptInfo field to the end of the struct,
to try to minimize ABI breakage for third-party code that may be examining
that struct.
Diffstat (limited to 'src/backend/nodes/outfuncs.c')
| -rw-r--r-- | src/backend/nodes/outfuncs.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/backend/nodes/outfuncs.c b/src/backend/nodes/outfuncs.c index 681f5f85bc7..96b09fbce71 100644 --- a/src/backend/nodes/outfuncs.c +++ b/src/backend/nodes/outfuncs.c @@ -1764,6 +1764,7 @@ _outIndexOptInfo(StringInfo str, IndexOptInfo *node) WRITE_NODE_FIELD(indpred); WRITE_BOOL_FIELD(predOK); WRITE_BOOL_FIELD(unique); + WRITE_BOOL_FIELD(immediate); WRITE_BOOL_FIELD(hypothetical); } |