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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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3
src/backend/parser/analyze.c
View File

@@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Header: /cvsroot/pgsql/src/backend/parser/analyze.c,v 1.195 2001/08/16 20:38:53 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/analyze.c,v 1.196 2001/08/21 16:36:03 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -995,7 +995,6 @@ transformCreateStmt(ParseState *pstate, CreateStmt *stmt)
index->relname = stmt->relname;
index->accessMethod = "btree";
index->indexParams = NIL;
index->withClause = NIL;
index->whereClause = NULL;
foreach(keys, constraint->keys)

8
src/backend/parser/gram.y
View File

@@ -11,7 +11,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.246 2001/08/16 20:38:53 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.247 2001/08/21 16:36:03 tgl Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@@ -2399,13 +2399,12 @@ RevokeStmt: REVOKE privileges ON opt_table relation_name_list FROM grantee_list
* QUERY:
* create index <indexname> on <relname>
* [ using <access> ] "(" (<col> with <op>)+ ")"
* [ with <parameters> ]
* [ where <predicate> ]
*
*****************************************************************************/
IndexStmt: CREATE index_opt_unique INDEX index_name ON relation_name
access_method_clause '(' index_params ')' opt_with where_clause
access_method_clause '(' index_params ')' where_clause
{
IndexStmt *n = makeNode(IndexStmt);
n->unique = $2;
@@ -2413,8 +2412,7 @@ IndexStmt: CREATE index_opt_unique INDEX index_name ON relation_name
n->relname = $6;
n->accessMethod = $7;
n->indexParams = $9;
n->withClause = $11;
n->whereClause = $12;
n->whereClause = $11;
$$ = (Node *)n;
}
;