Re: small psql patch - show Schema name for \dt \dv \dS

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От Bruce Momjian
Тема Re: small psql patch - show Schema name for \dt \dv \dS
Дата
Msg-id 200208021826.g72IQjv07507@candle.pha.pa.us
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Ответ на Re: small psql patch - show Schema name for \dt \dv \dS  (Tom Lane <tgl@sss.pgh.pa.us>)
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Tom Lane wrote:
> >> Backend pid doesn't solve this issue, because the temp schema name for a
> >> logged-in user is based on MyBackendId, not pid, i.e. your temp schema
> >> name is something like pg_temp_1 when MyBackendId = 1, etc. It would be
> >> easy enough to write a function exposing this, the question is whether
> >> it is desirable to expose it?
>
> I see no reason to do so at all.
>
> What you want is not the BackendId; what you want is the temp schema
> name, and current_schemas() can tell you that.
>
> But so far I haven't seen any convincing argument why any client query
> would really want to look at current_schemas(), either.  What you
> actually want to know about is visibility, and computing that from
> current_schemas() is quite an expensive proposition.  I think what
> we need to expose is RelationIsVisible and friends, not BackendId.

Well, if we are going to reach 7.3, we had better figure out what we are
doing in this area.  Let's start talking.

--
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 853-3000
  +  If your life is a hard drive,     |  830 Blythe Avenue
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