diff options
| author | Tom Lane <tgl@sss.pgh.pa.us> | 2009-07-29 20:56:21 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2009-07-29 20:56:21 +0000 |
| commit | 25d9bf2e3e66ee2e546c5c523d148ecab6ee1dcc (patch) | |
| tree | b0dee0f1d6111fd6658d432ec30e5ddb88adc02f /src/backend/utils | |
| parent | 850490579318ff52097eec92ce535357dd0c7a3a (diff) | |
| download | postgresql-25d9bf2e3e66ee2e546c5c523d148ecab6ee1dcc.tar.gz postgresql-25d9bf2e3e66ee2e546c5c523d148ecab6ee1dcc.zip | |
Support deferrable uniqueness constraints.
The current implementation fires an AFTER ROW trigger for each tuple that
looks like it might be non-unique according to the index contents at the
time of insertion. This works well as long as there aren't many conflicts,
but won't scale to massive unique-key reassignments. Improving that case
is a TODO item.
Dean Rasheed
Diffstat (limited to 'src/backend/utils')
| -rw-r--r-- | src/backend/utils/adt/ruleutils.c | 12 | ||||
| -rw-r--r-- | src/backend/utils/cache/relcache.c | 4 |
2 files changed, 8 insertions, 8 deletions
diff --git a/src/backend/utils/adt/ruleutils.c b/src/backend/utils/adt/ruleutils.c index 9767b9f1f50..752e84dbfea 100644 --- a/src/backend/utils/adt/ruleutils.c +++ b/src/backend/utils/adt/ruleutils.c @@ -9,7 +9,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/utils/adt/ruleutils.c,v 1.304 2009/07/24 21:08:42 tgl Exp $ + * $PostgreSQL: pgsql/src/backend/utils/adt/ruleutils.c,v 1.305 2009/07/29 20:56:19 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -1044,11 +1044,6 @@ pg_get_constraintdef_worker(Oid constraintId, bool fullCommand, if (string) appendStringInfo(&buf, " ON DELETE %s", string); - if (conForm->condeferrable) - appendStringInfo(&buf, " DEFERRABLE"); - if (conForm->condeferred) - appendStringInfo(&buf, " INITIALLY DEFERRED"); - break; } case CONSTRAINT_PRIMARY: @@ -1150,6 +1145,11 @@ pg_get_constraintdef_worker(Oid constraintId, bool fullCommand, break; } + if (conForm->condeferrable) + appendStringInfo(&buf, " DEFERRABLE"); + if (conForm->condeferred) + appendStringInfo(&buf, " INITIALLY DEFERRED"); + /* Cleanup */ ReleaseSysCache(tup); diff --git a/src/backend/utils/cache/relcache.c b/src/backend/utils/cache/relcache.c index 775865d5696..639593743d0 100644 --- a/src/backend/utils/cache/relcache.c +++ b/src/backend/utils/cache/relcache.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/utils/cache/relcache.c,v 1.287 2009/06/11 14:49:05 momjian Exp $ + * $PostgreSQL: pgsql/src/backend/utils/cache/relcache.c,v 1.288 2009/07/29 20:56:19 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -2938,7 +2938,7 @@ RelationGetIndexList(Relation relation) /* Check to see if it is a unique, non-partial btree index on OID */ if (index->indnatts == 1 && - index->indisunique && + index->indisunique && index->indimmediate && index->indkey.values[0] == ObjectIdAttributeNumber && index->indclass.values[0] == OID_BTREE_OPS_OID && heap_attisnull(htup, Anum_pg_index_indpred)) |