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> * Consider using hash buckets to do DISTINCT, rather than sorting
>
>   This would be beneficial when there are few distinct values.
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Bruce Momjian 2004-09-02 01:18:46 +00:00
parent bf831f6e9f
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@ -5,7 +5,7 @@ TODO list for PostgreSQL
Bracketed items "[]" have more detail.
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
Last updated: Mon Aug 30 12:08:12 EDT 2004
Last updated: Wed Sep 1 21:18:44 EDT 2004
The most recent version of this document can be viewed at the PostgreSQL web site, http://www.PostgreSQL.org.
@ -802,6 +802,9 @@ Optimizer / Executor
CHECK constraints contain information about the distribution of values
within the table. This is also useful for implementing subtables where
a tables content is distributed across several subtables.
* Consider using hash buckets to do DISTINCT, rather than sorting
This would be beneficial when there are few distinct values.
Miscellaneous