From 7bddca3450cc8631e5bf05e43988cf10ae32230e Mon Sep 17 00:00:00 2001 From: Tom Lane Date: Wed, 14 Feb 2007 01:58:58 +0000 Subject: Fix up foreign-key mechanism so that there is a sound semantic basis for the equality checks it applies, instead of a random dependence on whatever operators might be named "=". The equality operators will now be selected from the opfamily of the unique index that the FK constraint depends on to enforce uniqueness of the referenced columns; therefore they are certain to be consistent with that index's notion of equality. Among other things this should fix the problem noted awhile back that pg_dump may fail for foreign-key constraints on user-defined types when the required operators aren't in the search path. This also means that the former warning condition about "foreign key constraint will require costly sequential scans" is gone: if the comparison condition isn't indexable then we'll reject the constraint entirely. All per past discussions. Along the way, make the RI triggers look into pg_constraint for their information, instead of using pg_trigger.tgargs; and get rid of the always error-prone fixed-size string buffers in ri_triggers.c in favor of building up the RI queries in StringInfo buffers. initdb forced due to columns added to pg_constraint and pg_trigger. --- src/backend/commands/typecmds.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'src/backend/commands/typecmds.c') diff --git a/src/backend/commands/typecmds.c b/src/backend/commands/typecmds.c index 4f88e9561cd..99f964db74d 100644 --- a/src/backend/commands/typecmds.c +++ b/src/backend/commands/typecmds.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/commands/typecmds.c,v 1.99 2007/01/05 22:19:26 momjian Exp $ + * $PostgreSQL: pgsql/src/backend/commands/typecmds.c,v 1.100 2007/02/14 01:58:57 tgl Exp $ * * DESCRIPTION * The "DefineFoo" routines take the parse tree and pick out the @@ -1966,6 +1966,9 @@ domainAddConstraint(Oid domainOid, Oid domainNamespace, Oid baseTypeOid, domainOid, /* domain constraint */ InvalidOid, /* Foreign key fields */ NULL, + NULL, + NULL, + NULL, 0, ' ', ' ', -- cgit v1.2.3