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Add mention of possible patent problems with star joins, per Joshua

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Drake:

<   and merge the bitmaps to perform the join on the fact table.
>   and merge the bitmaps to perform the join on the fact table.  Some
>   of these algorithms might be patented.
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Bruce Momjian
2005-12-17 17:04:41 +00:00
parent 9e9a844f55
commit 16843ba33c
2 changed files with 6 additions and 4 deletions
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doc/TODO
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@ -2,7 +2,7 @@
PostgreSQL TODO List
====================
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
Last updated: Sat Dec 17 11:43:02 EST 2005
Last updated: Sat Dec 17 12:03:45 EST 2005
The most recent version of this document can be viewed at
http://www.postgresql.org/docs/faqs.TODO.html.
@ -1036,7 +1036,8 @@ Optimizer / Executor
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.
and merge the bitmaps to perform the join on the fact table. Some
of these algorithms might be patented.
Miscellaneous Performance