From 25af534ea134cff88342e5e270e6a213a1b7edb4 Mon Sep 17 00:00:00 2001 From: Bruce Momjian Date: Sat, 17 Dec 2005 19:03:24 +0000 Subject: [PATCH] Remove item: < * Allow star join optimizations < < While our bitmap scan allows multiple indexes to be joined to get < to heap rows, a star joins allows multiple dimension _tables_ to < be joined to index into a larger main fact table. The join is < usually performed by either creating a cartesian product of all < the dimmension tables and doing a single join on that product or < using subselects to create bitmaps of each dimmension table match < and merge the bitmaps to perform the join on the fact table. Some < of these algorithms might be patented. --- doc/TODO | 12 +----------- doc/src/FAQ/TODO.html | 12 +----------- 2 files changed, 2 insertions(+), 22 deletions(-) diff --git a/doc/TODO b/doc/TODO index 3070299000..24f8e250f0 100644 --- a/doc/TODO +++ b/doc/TODO @@ -2,7 +2,7 @@ PostgreSQL TODO List ==================== Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us) -Last updated: Sat Dec 17 13:06:57 EST 2005 +Last updated: Sat Dec 17 14:03:20 EST 2005 The most recent version of this document can be viewed at http://www.postgresql.org/docs/faqs.TODO.html. @@ -1029,16 +1029,6 @@ Optimizer / Executor * Log statements where the optimizer row estimates were dramatically different from the number of rows actually found? -* Allow star join optimizations - - While our bitmap scan allows multiple indexes to be joined to get - to heap rows, a star joins allows multiple dimension _tables_ to - be joined to index into a larger main fact table. The join is - usually performed by either creating a cartesian product of all - the dimmension tables and doing a single join on that product or - using subselects to create bitmaps of each dimmension table match - and merge the bitmaps to perform the join on the fact table. Some - of these algorithms might be patented. Miscellaneous Performance diff --git a/doc/src/FAQ/TODO.html b/doc/src/FAQ/TODO.html index 80247626b5..32add687d5 100644 --- a/doc/src/FAQ/TODO.html +++ b/doc/src/FAQ/TODO.html @@ -8,7 +8,7 @@

PostgreSQL TODO List

Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
-Last updated: Sat Dec 17 13:06:57 EST 2005 +Last updated: Sat Dec 17 14:03:20 EST 2005

The most recent version of this document can be viewed at
http://www.postgresql.org/docs/faqs.TODO.html. @@ -934,16 +934,6 @@ first.

  • Log statements where the optimizer row estimates were dramatically different from the number of rows actually found? -
  • Allow star join optimizations -

    While our bitmap scan allows multiple indexes to be joined to get - to heap rows, a star joins allows multiple dimension _tables_ to - be joined to index into a larger main fact table. The join is - usually performed by either creating a cartesian product of all - the dimmension tables and doing a single join on that product or - using subselects to create bitmaps of each dimmension table match - and merge the bitmaps to perform the join on the fact table. Some - of these algorithms might be patented. -

    • Miscellaneous Performance

    -- GitLab