Re: Performance of column order

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От
Bruce Momjian
Тема
Re: Performance of column order
Дата
Msg-id
200204181527.g3IFRxL09772@candle.pha.pa.us
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Дерево обсуждения
Performance of column order Egon Sommer <Service@Sommer-Maschinenbau.de>
Re: Performance of column order Tom Lane <tgl@sss.pgh.pa.us>
Re: Performance of column order Bruce Momjian <pgman@candle.pha.pa.us>
Egon Sommer wrote:
> Hallo!
> 
> Do anybody know if the order of the columns in a table has affect
> on the performance?
> 
> Should I use length-variable colums like TEXT, BLOB,... alfter
> length-static colums like INTEGER, BOOLEAN, ...?

It is very slightly faster to have variable length stuff after fixed length
fields.

> Is there a advantage to create a separate table for BLOBS and
> TEXT joining the main table about a primary key?

Probably, though TOAST stores large stuff in backup tables anyway, so
there is probably little difference.

--
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 853-3000
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