Re: Limitations of PostgreSQL
От | Dean Gibson (DB Administrator) |
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Тема | Re: Limitations of PostgreSQL |
Дата | |
Msg-id | 434E8BBA.8040305@ultimeth.com обсуждение исходный текст |
Ответ на | Re: Limitations of PostgreSQL (Scott Marlowe <smarlowe@g2switchworks.com>) |
Ответы |
Re: Limitations of PostgreSQL
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Список | pgsql-general |
What's the point of a binary search if the list is small enough to fit on a line or two? And if a query can be substituted for N1-NN, you have to read all the values anyway, and then the function is trivially expressed as a normal query with no decrease in speed. -- Dean > On Wed, 2005-10-12 at 20:08, Michael Fuhr wrote: > >> Here's an excerpt from the MySQL documentation: >> INTERVAL(N,N1,N2,N3,...) >> Returns 0 if N < N1, 1 if N < N2 and so on or -1 if N is >> NULL. All arguments are treated as integers. It is required >> that N1 < N2 < N3 < ... < Nn for this function to work >> correctly. This is because a binary search is used (very fast). >>
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