From 25d9bf2e3e66ee2e546c5c523d148ecab6ee1dcc Mon Sep 17 00:00:00 2001 From: Tom Lane Date: Wed, 29 Jul 2009 20:56:21 +0000 Subject: 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 --- src/include/utils/builtins.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'src/include/utils/builtins.h') diff --git a/src/include/utils/builtins.h b/src/include/utils/builtins.h index 5547b6c8c93..72b39f70685 100644 --- a/src/include/utils/builtins.h +++ b/src/include/utils/builtins.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/utils/builtins.h,v 1.334 2009/07/16 06:33:46 petere Exp $ + * $PostgreSQL: pgsql/src/include/utils/builtins.h,v 1.335 2009/07/29 20:56:21 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -1029,6 +1029,9 @@ extern Datum window_nth_value(PG_FUNCTION_ARGS); /* access/transam/twophase.c */ extern Datum pg_prepared_xact(PG_FUNCTION_ARGS); +/* commands/constraint.c */ +extern Datum unique_key_recheck(PG_FUNCTION_ARGS); + /* commands/prepare.c */ extern Datum pg_prepared_statement(PG_FUNCTION_ARGS); -- cgit v1.2.3