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Tom Lane 9a915e596f Improve the handling of SET CONSTRAINTS commands by having them search ... pg_constraint before searching pg_trigger. This allows saner handling of corner cases; in particular we now say "constraint is not deferrable" rather than "constraint does not exist" when the command is applied to a constraint that's inherently non-deferrable. Per a gripe several months ago from hubert depesz lubaczewski. To make this work without breaking user-defined constraint triggers, we have to add entries for them to pg_constraint. However, in return we can remove the pgconstrname column from pg_constraint, which represents a fairly sizable space savings. I also replaced the tgisconstraint column with tgisinternal; the old meaning of tgisconstraint can now be had by testing for nonzero tgconstraint, while there is no other way to get the old meaning of nonzero tgconstraint, namely that the trigger was internally generated rather than being user-created. In passing, fix an old misstatement in the docs and comments, namely that pg_trigger.tgdeferrable is exactly redundant with pg_constraint.condeferrable. Actually, we mark RI action triggers as nondeferrable even when they belong to a nominally deferrable FK constraint. The SET CONSTRAINTS code now relies on that instead of hard-coding a list of exception OIDs.		16 years ago
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Makefile	Refactor backend makefiles to remove lots of duplicate code	18 years ago
dest.c	Update copyright for the year 2010.	16 years ago
fastpath.c	Update copyright for the year 2010.	16 years ago
postgres.c	Remove unnecessary, inconsistent flag resets in ProcessInterrupts.	16 years ago
pquery.c	Update copyright for the year 2010.	16 years ago
utility.c	Improve the handling of SET CONSTRAINTS commands by having them search	16 years ago