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| 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/commands/indexcmds.c | |
| parent | 850490579318ff52097eec92ce535357dd0c7a3a (diff) | |
| download | postgresql-25d9bf2e3e66ee2e546c5c523d148ecab6ee1dcc.tar.gz | |
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/commands/indexcmds.c')
| -rw-r--r-- | src/backend/commands/indexcmds.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/src/backend/commands/indexcmds.c b/src/backend/commands/indexcmds.c index ef879a3df2..96272ab998 100644 --- a/src/backend/commands/indexcmds.c +++ b/src/backend/commands/indexcmds.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/commands/indexcmds.c,v 1.186 2009/07/16 06:33:42 petere Exp $ + * $PostgreSQL: pgsql/src/backend/commands/indexcmds.c,v 1.187 2009/07/29 20:56:18 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -87,6 +87,8 @@ static bool relationHasPrimaryKey(Relation rel); * 'primary': mark the index as a primary key in the catalogs. * 'isconstraint': index is for a PRIMARY KEY or UNIQUE constraint, * so build a pg_constraint entry for it. + * 'deferrable': constraint is DEFERRABLE. + * 'initdeferred': constraint is INITIALLY DEFERRED. * 'is_alter_table': this is due to an ALTER rather than a CREATE operation. * 'check_rights': check for CREATE rights in the namespace. (This should * be true except when ALTER is deleting/recreating an index.) @@ -107,6 +109,8 @@ DefineIndex(RangeVar *heapRelation, bool unique, bool primary, bool isconstraint, + bool deferrable, + bool initdeferred, bool is_alter_table, bool check_rights, bool skip_build, @@ -447,7 +451,8 @@ DefineIndex(RangeVar *heapRelation, indexRelationId = index_create(relationId, indexRelationName, indexRelationId, indexInfo, accessMethodId, tablespaceId, classObjectId, - coloptions, reloptions, primary, isconstraint, + coloptions, reloptions, primary, + isconstraint, deferrable, initdeferred, allowSystemTableMods, skip_build, concurrent); return; /* We're done, in the standard case */ @@ -465,7 +470,8 @@ DefineIndex(RangeVar *heapRelation, indexRelationId = index_create(relationId, indexRelationName, indexRelationId, indexInfo, accessMethodId, tablespaceId, classObjectId, - coloptions, reloptions, primary, isconstraint, + coloptions, reloptions, primary, + isconstraint, deferrable, initdeferred, allowSystemTableMods, true, concurrent); /* |