Re: [BUGS] BUG #14800: substring produces different results with similar types

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От Tom Lane
Тема Re: [BUGS] BUG #14800: substring produces different results with similar types
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Msg-id 30250.1504709462@sss.pgh.pa.us
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Ответ на Re: [BUGS] BUG #14800: substring produces different results withsimilar types  (Francisco Olarte <folarte@peoplecall.com>)
Ответы Re: [BUGS] BUG #14800: substring produces different results withsimilar types  (Артём Костин <kostin.artem@gmail.com>)
Re: [BUGS] BUG #14800: substring produces different results withsimilar types  (Francisco Olarte <folarte@peoplecall.com>)
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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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