Re: Combining Aggregates
| От | Petr Jelinek |
|---|---|
| Тема | Re: Combining Aggregates |
| Дата | |
| Msg-id | 54915820.4020106@2ndquadrant.com обсуждение исходный текст |
| Ответ на | Re: Combining Aggregates (Atri Sharma <atri.jiit@gmail.com>) |
| Список | pgsql-hackers |
On 17/12/14 11:02, Atri Sharma wrote: > > > On Wed, Dec 17, 2014 at 3:23 PM, Simon Riggs <simon@2ndquadrant.com > <mailto:simon@2ndquadrant.com>> wrote: > > KaiGai, David Rowley and myself have all made mention of various ways > we could optimize aggregates. > > Following WIP patch adds an extra function called a "combining > function", that is intended to allow the user to specify a > semantically correct way of breaking down an aggregate into multiple > steps. > > > Also, should we not have a sanity check for the user function provided? Looking at the code, yes, there seems to be XXX comment about that. -- Petr Jelinek http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services
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