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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/access/gin/gininsert.c | |
| 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/access/gin/gininsert.c')
| -rw-r--r-- | src/backend/access/gin/gininsert.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/src/backend/access/gin/gininsert.c b/src/backend/access/gin/gininsert.c index 2adaed43d48..d175a5a99e6 100644 --- a/src/backend/access/gin/gininsert.c +++ b/src/backend/access/gin/gininsert.c @@ -8,7 +8,7 @@ * Portions Copyright (c) 1994, Regents of the University of California * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/access/gin/gininsert.c,v 1.22 2009/06/11 14:48:53 momjian Exp $ + * $PostgreSQL: pgsql/src/backend/access/gin/gininsert.c,v 1.23 2009/07/29 20:56:17 tgl Exp $ *------------------------------------------------------------------------- */ @@ -415,12 +415,11 @@ gininsert(PG_FUNCTION_ARGS) #ifdef NOT_USED Relation heapRel = (Relation) PG_GETARG_POINTER(4); - bool checkUnique = PG_GETARG_BOOL(5); + IndexUniqueCheck checkUnique = (IndexUniqueCheck) PG_GETARG_INT32(5); #endif GinState ginstate; MemoryContext oldCtx; MemoryContext insertCtx; - uint32 res = 0; int i; insertCtx = AllocSetContextCreate(CurrentMemoryContext, @@ -440,7 +439,7 @@ gininsert(PG_FUNCTION_ARGS) memset(&collector, 0, sizeof(GinTupleCollector)); for (i = 0; i < ginstate.origTupdesc->natts; i++) if (!isnull[i]) - res += ginHeapTupleFastCollect(index, &ginstate, &collector, + ginHeapTupleFastCollect(index, &ginstate, &collector, (OffsetNumber) (i + 1), values[i], ht_ctid); ginHeapTupleFastInsert(index, &ginstate, &collector); @@ -449,7 +448,7 @@ gininsert(PG_FUNCTION_ARGS) { for (i = 0; i < ginstate.origTupdesc->natts; i++) if (!isnull[i]) - res += ginHeapTupleInsert(index, &ginstate, + ginHeapTupleInsert(index, &ginstate, (OffsetNumber) (i + 1), values[i], ht_ctid); } @@ -457,5 +456,5 @@ gininsert(PG_FUNCTION_ARGS) MemoryContextSwitchTo(oldCtx); MemoryContextDelete(insertCtx); - PG_RETURN_BOOL(res > 0); + PG_RETURN_BOOL(false); } |