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Restructure operator classes to allow improved handling of cross-data-type

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cases.  Operator classes now exist within "operator families".  While most
families are equivalent to a single class, related classes can be grouped
into one family to represent the fact that they are semantically compatible.
Cross-type operators are now naturally adjunct parts of a family, without
having to wedge them into a particular opclass as we had done originally.

This commit restructures the catalogs and cleans up enough of the fallout so
that everything still works at least as well as before, but most of the work
needed to actually improve the planner's behavior will come later.  Also,
there are not yet CREATE/DROP/ALTER OPERATOR FAMILY commands; the only way
to create a new family right now is to allow CREATE OPERATOR CLASS to make
one by default.  I owe some more documentation work, too.  But that can all
be done in smaller pieces once this infrastructure is in place.
This commit is contained in:
Tom Lane
2006-12-23 00:43:13 +00:00
parent d31ccb6c3e
commit a78fcfb512
76 changed files with 4753 additions and 4100 deletions
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6
contrib/intarray/_int.sql.in
View File

@ -459,9 +459,9 @@ AS
--GIN
--mark built-in gin's _int4_ops as non default
update pg_opclass set opcdefault = 'f' where
pg_opclass.opcamid = (select pg_am.oid from pg_am where amname='gin') and
opcname = '_int4_ops';
update pg_catalog.pg_opclass set opcdefault = 'f'
where opcmethod = (select oid from pg_catalog.pg_am where amname='gin') and
opcname = '_int4_ops';
CREATE FUNCTION ginint4_queryextract(internal, internal, int2)
RETURNS internal

8
contrib/intarray/uninstall__int.sql
View File

@ -124,7 +124,7 @@ DROP FUNCTION querytree(query_int);
DROP TYPE query_int CASCADE;
update pg_opclass set opcdefault = 't' where
pg_opclass.opcamid = (select pg_am.oid from pg_am where amname='gin') and
opcname = '_int4_ops';
--mark built-in gin's _int4_ops as default again
update pg_catalog.pg_opclass set opcdefault = 't'
where opcmethod = (select oid from pg_catalog.pg_am where amname='gin') and
opcname = '_int4_ops';