database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-06-13 07:41:39 +03:00
Code Activity

Support deferrable uniqueness constraints.

Browse Source 
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
This commit is contained in:
Tom Lane
2009-07-29 20:56:21 +00:00
parent 8504905793
commit 25d9bf2e3e
51 changed files with 1241 additions and 245 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
src/backend/utils/adt/ruleutils.c
View File

@ -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);