Re: Performance of column order
| От | Bruce Momjian |
|---|---|
| Тема | Re: Performance of column order |
| Дата | |
| Msg-id | 200204181527.g3IFRxL09772@candle.pha.pa.us обсуждение исходный текст |
| Ответ на | Performance of column order (Egon Sommer <Service@Sommer-Maschinenbau.de>) |
| Список | pgsql-general |
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 + If your life is a hard drive, | 830 Blythe Avenue + Christ can be your backup. | Drexel Hill, Pennsylvania 19026
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