Re: record identical operator - Review
От | Kevin Grittner |
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Тема | Re: record identical operator - Review |
Дата | |
Msg-id | 1380546492.6460.YahooMailNeo@web162902.mail.bf1.yahoo.com обсуждение исходный текст |
Ответ на | Re: record identical operator - Review (Steve Singer <steve@ssinger.info>) |
Ответы |
Re: record identical operator - Review
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Список | pgsql-hackers |
Steve Singer <steve@ssinger.info> wrote: > How about > > To support matching of rows which include elements without a default > B-tree operator class, the following operators are defined for composite > type comparison: > <literal>*=</>, > <literal>*<></>, > <literal>*<</>, > <literal>*<=</>, > <literal>*></>, and > <literal>*>=</>. > > These operators compare the internal binary representation of the two > rows. Two rows might have a different binary representation even > though comparisons of the two rows with the equality operator is true. > The ordering of rows under these comparision operators is deterministic > but not otherwise meaningful. These operators are used internally for > materialized views and might be useful for other specialized purposes > such as replication but are not intended to be generally useful for > writing queries. I agree that's an improvement. Thanks! -- Kevin Grittner EDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company
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