Re: [BUGS] BUG #14800: substring produces different results withsimilar types
| От | Артём Костин |
|---|---|
| Тема | Re: [BUGS] BUG #14800: substring produces different results withsimilar types |
| Дата | |
| Msg-id | CALQQPTeL=9syDfDEO=wRs8u-vYwV3WP9t2bLVt85Ph4OhQ8hMw@mail.gmail.com обсуждение исходный текст |
| Ответ на | Re: [BUGS] BUG #14800: substring produces different results with similar types (Tom Lane <tgl@sss.pgh.pa.us>) |
| Ответы |
Re: [BUGS] BUG #14800: substring produces different results with similar types
Re: [BUGS] BUG #14800: substring produces different results withsimilar types |
| Список | pgsql-bugs |
But documentation says different. So this behaviour is unxpected.
6 сент. 2017 г. 5:51 PM пользователь "Tom Lane" <tgl@sss.pgh.pa.us> написал:
Francisco Olarte <folarte@peoplecall.com> writes:
> Anyway, you may notice char() discards trailing blanks, varchar does not:
More precisely, converting from char(n) to varchar or text discards
trailing blanks. Since both substring() and the || operator take
text argument types, an implicit coercion to text is happening in
these examples ... and that's where the blanks went.
regards, tom lane
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