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Update bitmap index description:

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<   Such indexes could be more compact if there are only a few unique values.
>   Such indexes could be more compact if there are only a few distinct values.
>   Such indexes can also be compressed.  Keeping such indexes updated can be
>   costly.
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Bruce Momjian 2004-11-09 15:11:11 +00:00
parent 1813d94664
commit 960f545041
1 changed files with 4 additions and 2 deletions
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@ -6,7 +6,7 @@ TODO list for PostgreSQL
Bracketed items "[]" have more detail.
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
Last updated: Mon Nov 8 23:13:58 EST 2004
Last updated: Tue Nov 9 10:10:57 EST 2004
The most recent version of this document can be viewed at the PostgreSQL web
site, http://www.PostgreSQL.org.
@ -261,7 +261,9 @@ Indexes
* Allow the creation of on-disk bitmap indexes which can be quickly
combined with other bitmap indexes
Such indexes could be more compact if there are only a few unique values.
Such indexes could be more compact if there are only a few distinct values.
Such indexes can also be compressed. Keeping such indexes updated can be
costly.
* Allow use of indexes to search for NULLs