Re: Relation of indices to ANALYZE
От
Tom Lane
Тема
Re: Relation of indices to ANALYZE
Дата
Msg-id
5740.1058466436@sss.pgh.pa.us
Ответ на
Relation of indices to ANALYZE (Bill Moran)
Список
Дерево обсуждения
Relation of indices to ANALYZE Bill Moran <wmoran@potentialtech.com>
Re: Relation of indices to ANALYZE Richard Huxton <dev@archonet.com>
Re: Relation of indices to ANALYZE Tom Lane <tgl@sss.pgh.pa.us>
Re: Relation of indices to ANALYZE Bill Moran <wmoran@potentialtech.com>
Bill Moran writes: > Specifically, I'm wondering if I should do > the ANALYZE before or after I recreate the indexes, or whether it matters. At the moment it does not matter --- ANALYZE computes statistics for each column of a table regardless of what indexes exist. There has been some talk of trying to compute statistics for the contents of functional indexes. Also, if we ever do anything about computing multicolumn correlation statistics, we'd likely choose which ones are worth computing based on the presence of multicolumn indexes. So if you want to future-proof your code I'd recommend recreating the indexes before you ANALYZE. regards, tom lane
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