Re: Converting MySQL tinyint to PostgreSQL
От | Joe |
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Тема | Re: Converting MySQL tinyint to PostgreSQL |
Дата | |
Msg-id | 42D4381C.6090208@freedomcircle.net обсуждение исходный текст |
Ответ на | Re: Converting MySQL tinyint to PostgreSQL (Tom Lane <tgl@sss.pgh.pa.us>) |
Ответы |
Re: Converting MySQL tinyint to PostgreSQL
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Список | pgsql-general |
Tom Lane wrote: > Because the length specification is in *characters*, which is not by any > means the same as *bytes*. > > We could possibly put enough intelligence into the low-level tuple > manipulation routines to count characters in whatever encoding we happen > to be using, but it's a lot faster and more robust to insist on a count > word for every variable-width field. I guess what you're saying is that PostgreSQL stores characters in varying-length encodings. If it stored character data in Unicode (UCS-16) it would always take up two-bytes per character. Have you considered supporting NCHAR/NVARCHAR, aka NATIONAL character data? Wouldn't UCS-16 be needed to support multi-locale clusters (as someone as inquiring about recently)? Joe
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