Re: [GENERAL] Joins and links
От | Bruce Momjian |
---|---|
Тема | Re: [GENERAL] Joins and links |
Дата | |
Msg-id | 199907051510.LAA03606@candle.pha.pa.us обсуждение исходный текст |
Ответ на | Re: [GENERAL] Joins and links (David Warnock <david@sundayta.co.uk>) |
Список | pgsql-general |
> Leon, > > I have a few questions abo8ut what you are proposing. > > My background was in non SQL dbms (DataFlex) which supported recnums > which as you pointed out had a number of advantages. However, recnums > also have a significant number of problems. Some features like > replication have significant dificulties. Others such as exporting and > re-loading your data also need special work-arounds. > > A solution I have seen in some sql dbms (eg MS SQL Server) is to be able > to choose one index and have the database table sorted by this index. > Then you don't need a separate index for that sort-order. It means that > almost any index can work like a recnum and avoid looking in both the > index and the data. I am trying to remember the name of this feature but > cannot at the moment. > We have CLUSTER command, but it is something that has to be run manually. -- Bruce Momjian | http://www.op.net/~candle maillist@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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