提交 f9ed7fb6 编写于 作者: B Bruce Momjian

Completed:

> * -Add hash for evaluating GROUP BY aggregates (Tom)
上级 05790969
TODO list for PostgreSQL
========================
Last updated: Wed Nov 6 00:55:00 EST 2002
Last updated: Wed Nov 6 00:56:27 EST 2002
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
......@@ -371,7 +371,7 @@ Optimizer / Executor
* Improve Subplan list handling
* Allow Subplans to use efficient joins(hash, merge) with upper variable
* Add hash for evaluating GROUP BY aggregates
* -Add hash for evaluating GROUP BY aggregates (Tom)
* Allow merge and hash joins on expressions not just simple variables (Tom)
* Make IN/NOT IN have similar performance to EXISTS/NOT EXISTS [exists]
* Missing optimizer selectivities for date, r-tree, etc. [optimizer]
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册