Re: [HACKERS] strcmp() tie-breaker for identical ICU-collated strings
От | Robert Haas |
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Тема | Re: [HACKERS] strcmp() tie-breaker for identical ICU-collated strings |
Дата | |
Msg-id | CA+Tgmoa=-3a2iB9ZQUfdufpRk6P7u_eycRKfROpkFLVOskeYZg@mail.gmail.com обсуждение исходный текст |
Ответ на | Re: [HACKERS] strcmp() tie-breaker for identical ICU-collated strings (Peter Eisentraut <peter.eisentraut@2ndquadrant.com>) |
Ответы |
Re: [HACKERS] strcmp() tie-breaker for identical ICU-collated strings
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Список | pgsql-hackers |
On Fri, Jun 9, 2017 at 1:45 PM, Peter Eisentraut <peter.eisentraut@2ndquadrant.com> wrote: > On 6/9/17 12:17, Robert Haas wrote: >> IOW, suppose there >> were a collation API call distill() which had the property that >> strcmp(distill(X), distill(Y)) == 0 iff X and Y are considered equal >> under that collation. Then, you could define your hash function as >> hash_any(distill(X)). Alternatively, if the collation library >> provided its own hashing function, that would be fine too, and >> probably faster. > > Isn't that what strxfrm() is? Yeah, just with bugs. If ICU has a non-buggy equivalent, then we can make this work. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company
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