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Restructure pg_opclass, pg_amop, and pg_amproc per previous discussions in

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pgsql-hackers.  pg_opclass now has a row for each opclass supported by each
index AM, not a row for each opclass name.  This allows pg_opclass to show
directly whether an AM supports an opclass, and furthermore makes it possible
to store additional information about an opclass that might be AM-dependent.
pg_opclass and pg_amop now store "lossy" and "haskeytype" information that we
previously expected the user to remember to provide in CREATE INDEX commands.
Lossiness is no longer an index-level property, but is associated with the
use of a particular operator in a particular index opclass.

Along the way, IndexSupportInitialize now uses the syscaches to retrieve
pg_amop and pg_amproc entries.  I find this reduces backend launch time by
about ten percent, at the cost of a couple more special cases in catcache.c's
IndexScanOK.

Initial work by Oleg Bartunov and Teodor Sigaev, further hacking by Tom Lane.

initdb forced.
This commit is contained in:
Tom Lane
2001-08-21 16:36:06 +00:00
parent c2d1566912
commit f933766ba7
60 changed files with 1918 additions and 1929 deletions

127
src/tutorial/complex.source

@ -7,7 +7,7 @@
--
-- Copyright (c) 1994, Regents of the University of California
--
-- $Id: complex.source,v 1.8 2000/07/17 03:05:41 tgl Exp $
-- $Id: complex.source,v 1.9 2001/08/21 16:36:06 tgl Exp $
--
---------------------------------------------------------------------------
@ -169,14 +169,19 @@ CREATE OPERATOR > (
restrict = scalargtsel, join = scalargtjoinsel
);
INSERT INTO pg_opclass (opcname, opcdeftype)
SELECT 'complex_abs_ops', oid FROM pg_type WHERE typname = 'complex';
INSERT INTO pg_opclass (opcamid, opcname, opcintype, opcdefault, opckeytype)
VALUES (
(SELECT oid FROM pg_am WHERE amname = 'btree'),
'complex_abs_ops',
(SELECT oid FROM pg_type WHERE typname = 'complex'),
true,
0);
SELECT oid, opcname, opcdeftype
SELECT oid, *
FROM pg_opclass WHERE opcname = 'complex_abs_ops';
SELECT o.oid AS opoid, o.oprname
INTO TABLE complex_ops_tmp
INTO TEMP TABLE complex_ops_tmp
FROM pg_operator o, pg_type t
WHERE o.oprleft = t.oid and o.oprright = t.oid
and t.typname = 'complex';
@ -184,34 +189,44 @@ WHERE o.oprleft = t.oid and o.oprright = t.oid
-- make sure we have the right operators
SELECT * from complex_ops_tmp;
INSERT INTO pg_amop (amopid, amopclaid, amopopr, amopstrategy)
SELECT am.oid, opcl.oid, c.opoid, 1
FROM pg_am am, pg_opclass opcl, complex_ops_tmp c
WHERE amname = 'btree' and opcname = 'complex_abs_ops'
INSERT INTO pg_amop (amopclaid, amopstrategy, amopreqcheck, amopopr)
SELECT opcl.oid, 1, false, c.opoid
FROM pg_opclass opcl, complex_ops_tmp c
WHERE
opcamid = (SELECT oid FROM pg_am WHERE amname = 'btree')
and opcname = 'complex_abs_ops'
and c.oprname = '<';
INSERT INTO pg_amop (amopid, amopclaid, amopopr, amopstrategy)
SELECT am.oid, opcl.oid, c.opoid, 2
FROM pg_am am, pg_opclass opcl, complex_ops_tmp c
WHERE amname = 'btree' and opcname = 'complex_abs_ops'
INSERT INTO pg_amop (amopclaid, amopstrategy, amopreqcheck, amopopr)
SELECT opcl.oid, 2, false, c.opoid
FROM pg_opclass opcl, complex_ops_tmp c
WHERE
opcamid = (SELECT oid FROM pg_am WHERE amname = 'btree')
and opcname = 'complex_abs_ops'
and c.oprname = '<=';
INSERT INTO pg_amop (amopid, amopclaid, amopopr, amopstrategy)
SELECT am.oid, opcl.oid, c.opoid, 3
FROM pg_am am, pg_opclass opcl, complex_ops_tmp c
WHERE amname = 'btree' and opcname = 'complex_abs_ops'
INSERT INTO pg_amop (amopclaid, amopstrategy, amopreqcheck, amopopr)
SELECT opcl.oid, 3, false, c.opoid
FROM pg_opclass opcl, complex_ops_tmp c
WHERE
opcamid = (SELECT oid FROM pg_am WHERE amname = 'btree')
and opcname = 'complex_abs_ops'
and c.oprname = '=';
INSERT INTO pg_amop (amopid, amopclaid, amopopr, amopstrategy)
SELECT am.oid, opcl.oid, c.opoid, 4
FROM pg_am am, pg_opclass opcl, complex_ops_tmp c
WHERE amname = 'btree' and opcname = 'complex_abs_ops'
INSERT INTO pg_amop (amopclaid, amopstrategy, amopreqcheck, amopopr)
SELECT opcl.oid, 4, false, c.opoid
FROM pg_opclass opcl, complex_ops_tmp c
WHERE
opcamid = (SELECT oid FROM pg_am WHERE amname = 'btree')
and opcname = 'complex_abs_ops'
and c.oprname = '>=';
INSERT INTO pg_amop (amopid, amopclaid, amopopr, amopstrategy)
SELECT am.oid, opcl.oid, c.opoid, 5
FROM pg_am am, pg_opclass opcl, complex_ops_tmp c
WHERE amname = 'btree' and opcname = 'complex_abs_ops'
INSERT INTO pg_amop (amopclaid, amopstrategy, amopreqcheck, amopopr)
SELECT opcl.oid, 5, false, c.opoid
FROM pg_opclass opcl, complex_ops_tmp c
WHERE
opcamid = (SELECT oid FROM pg_am WHERE amname = 'btree')
and opcname = 'complex_abs_ops'
and c.oprname = '>';
--
@ -220,10 +235,12 @@ CREATE FUNCTION complex_abs_cmp(complex, complex) RETURNS int4
SELECT oid, proname FROM pg_proc WHERE proname = 'complex_abs_cmp';
INSERT INTO pg_amproc (amid, amopclaid, amproc, amprocnum)
SELECT am.oid, opcl.oid, pro.oid, 1
FROM pg_am am, pg_opclass opcl, pg_proc pro
WHERE amname = 'btree' and opcname = 'complex_abs_ops'
INSERT INTO pg_amproc (amopclaid, amprocnum, amproc)
SELECT opcl.oid, 1, pro.oid
FROM pg_opclass opcl, pg_proc pro
WHERE
opcamid = (SELECT oid FROM pg_am WHERE amname = 'btree')
and opcname = 'complex_abs_ops'
and proname = 'complex_abs_cmp';
-- now, we can define a btree index on complex types. First, let's populate
@ -239,49 +256,19 @@ SELECT * from test_complex where a = '(56.0,-22.5)';
SELECT * from test_complex where a < '(56.0,-22.5)';
SELECT * from test_complex where a > '(56.0,-22.5)';
DELETE FROM pg_amop where (amopid, amopclaid, amopopr, amopstrategy)
= (
SELECT am.oid, opcl.oid, c.opoid, 1
FROM pg_am am, pg_opclass opcl, complex_ops_tmp c
WHERE amname = 'btree' and opcname = 'complex_abs_ops'
and c.oprname = '<');
DELETE FROM pg_amop WHERE
amopclaid = (SELECT oid FROM pg_opclass WHERE
opcamid = (SELECT oid FROM pg_am WHERE amname = 'btree')
and opcname = 'complex_abs_ops');
DELETE FROM pg_amop where (amopid, amopclaid, amopopr, amopstrategy)
= (
SELECT am.oid, opcl.oid, c.opoid, 2
FROM pg_am am, pg_opclass opcl, complex_ops_tmp c
WHERE amname = 'btree' and opcname = 'complex_abs_ops'
and c.oprname = '<=');
DELETE FROM pg_amproc WHERE
amopclaid = (SELECT oid FROM pg_opclass WHERE
opcamid = (SELECT oid FROM pg_am WHERE amname = 'btree')
and opcname = 'complex_abs_ops');
DELETE FROM pg_amop where (amopid, amopclaid, amopopr, amopstrategy)
= (
SELECT am.oid, opcl.oid, c.opoid, 3
FROM pg_am am, pg_opclass opcl, complex_ops_tmp c
WHERE amname = 'btree' and opcname = 'complex_abs_ops'
and c.oprname = '=');
DELETE FROM pg_amop where (amopid, amopclaid, amopopr, amopstrategy)
= (
SELECT am.oid, opcl.oid, c.opoid, 4
FROM pg_am am, pg_opclass opcl, complex_ops_tmp c
WHERE amname = 'btree' and opcname = 'complex_abs_ops'
and c.oprname = '>=');
DELETE FROM pg_amop where (amopid, amopclaid, amopopr, amopstrategy)
= (
SELECT am.oid, opcl.oid, c.opoid, 5
FROM pg_am am, pg_opclass opcl, complex_ops_tmp c
WHERE amname = 'btree' and opcname = 'complex_abs_ops'
and c.oprname = '>');
DELETE FROM pg_amproc where (amid, amopclaid, amproc, amprocnum)
= (
SELECT am.oid, opcl.oid, pro.oid, 1
FROM pg_am am, pg_opclass opcl, pg_proc pro
WHERE amname = 'btree' and opcname = 'complex_abs_ops'
and proname = 'complex_abs_cmp');
DELETE FROM pg_opclass WHERE opcname = 'complex_abs_ops';
DELETE FROM pg_opclass WHERE
opcamid = (SELECT oid FROM pg_am WHERE amname = 'btree')
and opcname = 'complex_abs_ops';
DROP FUNCTION complex_in(opaque);
DROP FUNCTION complex_out(opaque);