diff options
Diffstat (limited to 'src/backend/optimizer')
| -rw-r--r-- | src/backend/optimizer/README | 10 | ||||
| -rw-r--r-- | src/backend/optimizer/plan/README | 8 |
2 files changed, 12 insertions, 6 deletions
diff --git a/src/backend/optimizer/README b/src/backend/optimizer/README index a0df388993b..43f99d7fba4 100644 --- a/src/backend/optimizer/README +++ b/src/backend/optimizer/README @@ -1,5 +1,7 @@ -Summary -------- +$PostgreSQL: pgsql/src/backend/optimizer/README,v 1.42 2008/03/20 17:55:14 momjian Exp $ + +Optimizer +--------- These directories take the Query structure returned by the parser, and generate a plan used by the executor. The /plan directory generates the @@ -180,7 +182,7 @@ to see which join style should be applied for a valid join, ie, JOIN_INNER, JOIN_LEFT, etc.) -Valid OUTER JOIN optimizations +Valid OUTER JOIN Optimizations ------------------------------ The planner's treatment of outer join reordering is based on the following @@ -236,7 +238,7 @@ set must be expanded to include the whole of the lower OJ, thereby preventing it from being formed before the lower OJ is.) -Pulling up subqueries +Pulling Up Subqueries --------------------- As we described above, a subquery appearing in the range table is planned diff --git a/src/backend/optimizer/plan/README b/src/backend/optimizer/plan/README index d3a516834cc..10c32b64603 100644 --- a/src/backend/optimizer/plan/README +++ b/src/backend/optimizer/plan/README @@ -1,12 +1,16 @@ -Subselect notes from Vadim. +$PostgreSQL: pgsql/src/backend/optimizer/plan/README,v 1.2 2008/03/20 17:55:14 momjian Exp $ +Subselects +---------- + +Vadim B. Mikheev From owner-pgsql-hackers@hub.org Fri Feb 13 09:01:19 1998 Received: from renoir.op.net (root@renoir.op.net [209.152.193.4]) by candle.pha.pa.us (8.8.5/8.8.5) with ESMTP id JAA11576 for <maillist@candle.pha.pa.us>; Fri, 13 Feb 1998 09:01:17 -0500 (EST) -Received: from hub.org (hub.org [209.47.148.200]) by renoir.op.net (o1/$Revision: 1.1 $) with ESMTP id IAA09761 for <maillist@candle.pha.pa.us>; Fri, 13 Feb 1998 08:41:22 -0500 (EST) +Received: from hub.org (hub.org [209.47.148.200]) by renoir.op.net (o1/$Revision: 1.2 $) with ESMTP id IAA09761 for <maillist@candle.pha.pa.us>; Fri, 13 Feb 1998 08:41:22 -0500 (EST) Received: from localhost (majordom@localhost) by hub.org (8.8.8/8.7.5) with SMTP id IAA08135; Fri, 13 Feb 1998 08:40:17 -0500 (EST) Received: by hub.org (TLB v0.10a (1.23 tibbs 1997/01/09 00:29:32)); Fri, 13 Feb 1998 08:38:42 -0500 (EST) Received: (from majordom@localhost) by hub.org (8.8.8/8.7.5) id IAA06646 for pgsql-hackers-outgoing; Fri, 13 Feb 1998 08:38:35 -0500 (EST) |