Re: Isnumeric function?
От | Greg Stark |
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Тема | Re: Isnumeric function? |
Дата | |
Msg-id | 87isaow1a5.fsf@stark.xeocode.com обсуждение исходный текст |
Ответ на | Re: Isnumeric function? (Theo Galanakis <Theo.Galanakis@lonelyplanet.com.au>) |
Список | pgsql-sql |
Theo Galanakis <Theo.Galanakis@lonelyplanet.com.au> writes: > error: btree item size 2744 exceeds maximum 2713. > > I assume I had to change some server settings to extend the maximum, however I would guess the block size. But I'm just guessing. > in the end this column holds content, and even applying an index would be > incredible slow to search across hundred of thousands of "content" records > looking for a primary key. Perhaps you could have an indexed column that contains a crc32 hash? Then you could do searches by comparing crc32 which make for fast efficient integer index lookups. You should still include a comparison against the original content column since it is possible for there to be a rare crc32 collision. This doesn't let you do range lookups efficiently. But it does let you look up specific values quickly even when they aren't numeric. -- greg
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