Re: Modest proposal for making bpchar less inconsistent

Dne pá 13. 9. 2019 16:43 uživatel Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> napsal:

> It struck me that the real reason that we keep getting gripes about
> the weird behavior of CHAR(n) is that these functions (and, hence,
> their corresponding operators) fail to obey the "trailing blanks
> aren't significant" rule:
>
> regprocedure | prosrc
> -------------------------------------------+----------------------
> bpcharlike(character,text) | textlike
> bpcharnlike(character,text) | textnlike
> bpcharicregexeq(character,text) | texticregexeq
> bpcharicregexne(character,text) | texticregexne
> bpcharregexeq(character,text) | textregexeq
> bpcharregexne(character,text) | textregexne
> bpchariclike(character,text) | texticlike
> bpcharicnlike(character,text) | texticnlike
>
> They're just relying on binary compatibility of bpchar to text ...
> but of course textlike etc. think trailing blanks are significant.
>
> Every other primitive operation we have for bpchar correctly ignores
> the trailing spaces.
>
> We could fix this, and save some catalog space too, if we simply
> deleted these functions/operators and let such calls devolve
> into implicit casts to text.
>
> This might annoy people who are actually writing trailing spaces
> in their patterns to make such cases work. But I think there
> are probably not too many such people, and having real consistency
> here is worth something.
>

has sense

Pavel

>
> regards, tom lane
>
>
>