提交 2fe9f20d 编写于 作者: B Bruce Momjian

Not done:

> * Add hash for evaluating GROUP BY aggregates (Tom)
上级 f9ed7fb6
TODO list for PostgreSQL
========================
Last updated: Wed Nov 6 00:56:27 EST 2002
Last updated: Wed Nov 6 01:20:47 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 (Tom)
* 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]
......
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