| From: | Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com> |
|---|---|
| To: | masao(dot)fujii(at)oss(dot)nttdata(dot)com |
| Cc: | kuroda(dot)hayato(at)fujitsu(dot)com, houzj(dot)fnst(at)fujitsu(dot)com, ikedamsh(at)oss(dot)nttdata(dot)com, pgsql-hackers(at)lists(dot)postgresql(dot)org, tgl(at)sss(dot)pgh(dot)pa(dot)us |
| Subject: | Re: Allow escape in application_name |
| Date: | 2021-10-12 06:59:23 |
| Message-ID: | 20211012.155923.335245080163907104.horikyota.ntt@gmail.com |
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| Lists: | pgsql-hackers |
At Tue, 12 Oct 2021 15:42:23 +0900 (JST), Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com> wrote in
> If we code as the following:
...
> A. "^-?[0-9]+.*" : same to the current
> B. "^[^0-9-].*" : same to the current
> C. "^-[^0-9].*" : padding = 0, p doesn't advance.
> D. "^-" : padding = 0, p doesn't advance.
One possible cause of a difference in behavior is character class
handling including multibyte characters of isdigit and strtol. If
isdigit accepts '一' as a digit (some platforms might do this) , and
strtol doesn't (I believe it is universal behavior), '%一0p' is
converted to '%' and the pointer moves onto '一'. But I don't think we
need to do something for such a crazy specification.
regards.
--
Kyotaro Horiguchi
NTT Open Source Software Center
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