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Support deferrable uniqueness constraints.

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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
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6
src/backend/tcop/utility.c
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@ -10,7 +10,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/tcop/utility.c,v 1.312 2009/07/28 02:56:30 tgl Exp $
* $PostgreSQL: pgsql/src/backend/tcop/utility.c,v 1.313 2009/07/29 20:56:19 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -795,6 +795,8 @@ ProcessUtility(Node *parsetree,
stmt->unique,
stmt->primary,
stmt->isconstraint,
stmt->deferrable,
stmt->initdeferred,
false, /* is_alter_table */
true, /* check_rights */
false, /* skip_build */
@ -929,7 +931,7 @@ ProcessUtility(Node *parsetree,
case T_CreateTrigStmt:
CreateTrigger((CreateTrigStmt *) parsetree,
InvalidOid, InvalidOid, true);
InvalidOid, InvalidOid, NULL, true);
break;
case T_DropPropertyStmt: