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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
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6
src/include/utils/lsyscache.h
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@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: lsyscache.h,v 1.34 2001/06/14 01:09:22 tgl Exp $
* $Id: lsyscache.h,v 1.35 2001/08/21 16:36:06 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -15,7 +15,8 @@
#include "access/htup.h"
extern bool op_class(Oid opno, Oid opclass, Oid amopid);
extern bool op_in_opclass(Oid opno, Oid opclass);
extern bool op_requires_recheck(Oid opno, Oid opclass);
extern char *get_attname(Oid relid, AttrNumber attnum);
extern AttrNumber get_attnum(Oid relid, char *attname);
extern Oid get_atttype(Oid relid, AttrNumber attnum);
@ -23,6 +24,7 @@ extern bool get_attisset(Oid relid, char *attname);
extern int32 get_atttypmod(Oid relid, AttrNumber attnum);
extern void get_atttypetypmod(Oid relid, AttrNumber attnum,
Oid *typid, int32 *typmod);
extern bool opclass_is_btree(Oid opclass);
extern RegProcedure get_opcode(Oid opno);
extern char *get_opname(Oid opno);
extern bool op_mergejoinable(Oid opno, Oid ltype, Oid rtype,