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Tom Lane 7bddca3450 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.		19 years ago
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alter.h	Update CVS HEAD for 2007 copyright. Back branches are typically not	19 years ago
async.h	Update CVS HEAD for 2007 copyright. Back branches are typically not	19 years ago
cluster.h	Update CVS HEAD for 2007 copyright. Back branches are typically not	19 years ago
comment.h	Update CVS HEAD for 2007 copyright. Back branches are typically not	19 years ago
conversioncmds.h	Update CVS HEAD for 2007 copyright. Back branches are typically not	19 years ago
copy.h	Update CVS HEAD for 2007 copyright. Back branches are typically not	19 years ago
dbcommands.h	Update CVS HEAD for 2007 copyright. Back branches are typically not	19 years ago
defrem.h	Add CREATE/ALTER/DROP OPERATOR FAMILY commands, also COMMENT ON OPERATOR	19 years ago
explain.h	Update CVS HEAD for 2007 copyright. Back branches are typically not	19 years ago
lockcmds.h	Update CVS HEAD for 2007 copyright. Back branches are typically not	19 years ago
portalcmds.h	Update CVS HEAD for 2007 copyright. Back branches are typically not	19 years ago
prepare.h	Update CVS HEAD for 2007 copyright. Back branches are typically not	19 years ago
proclang.h	Create the pg_pltemplate system catalog to hold template information	21 years ago
schemacmds.h	Update CVS HEAD for 2007 copyright. Back branches are typically not	19 years ago
sequence.h	Update CVS HEAD for 2007 copyright. Back branches are typically not	19 years ago
tablecmds.h	Update CVS HEAD for 2007 copyright. Back branches are typically not	19 years ago
tablespace.h	Add GUC temp_tablespaces to provide a default location for temporary	19 years ago
trigger.h	Fix up foreign-key mechanism so that there is a sound semantic basis for the	19 years ago
typecmds.h	Update CVS HEAD for 2007 copyright. Back branches are typically not	19 years ago
user.h	pgindent run for 8.2.	20 years ago
vacuum.h	Update CVS HEAD for 2007 copyright. Back branches are typically not	19 years ago
variable.h	Update CVS HEAD for 2007 copyright. Back branches are typically not	19 years ago
version.h	Update CVS HEAD for 2007 copyright. Back branches are typically not	19 years ago
view.h	Update CVS HEAD for 2007 copyright. Back branches are typically not	19 years ago