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During ALTER TABLE ADD FOREIGN KEY, try to check the existing rows using

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a single LEFT JOIN query instead of firing the check trigger for each
row individually.  Stephan Szabo, with some kibitzing from Tom Lane and
Jan Wieck.
This commit is contained in:
Tom Lane
2003-10-06 16:38:28 +00:00
parent a0ab31dcc6
commit fec58f6c3f
3 changed files with 229 additions and 11 deletions
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5
src/include/commands/trigger.h
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@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: trigger.h,v 1.43 2003/08/04 02:40:13 momjian Exp $
* $Id: trigger.h,v 1.44 2003/10/06 16:38:28 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -197,5 +197,8 @@ extern void DeferredTriggerSetState(ConstraintsSetStmt *stmt);
* in utils/adt/ri_triggers.c
*/
extern bool RI_FKey_keyequal_upd(TriggerData *trigdata);
extern bool RI_Initial_Check(FkConstraint *fkconstraint,
Relation rel,
Relation pkrel);
#endif /* TRIGGER_H */