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types oids

From: Nicolas Aragon <nyco(at)jet(dot)es>
To: pgsql-interfaces(at)postgresql(dot)org
Subject: types oids
Date: 1999-08-16 23:18:35
Message-ID: 19990817011835.A165@atlante (view raw or flat)
Thread:
Lists: pgsql-interfaces
Hello,

I'm programming with pqlib from Pascal (FPC) and trying to build some
classes to encapsulate result sets in a similar way as Delphi.

I need to know the type of every field and I've found that PQftype returns
an OID. OK, I can query pg_type system table and find out type information.

But this leads me to new questions because it seems that standard types
aren't hardcoded anywhere. pg_type tells me the name, size and some other
information about the type. But what about the "kind" of the type (numeric,
text, date...)?

I can only think of comparing the name with a list of names for standard
types. Is there another simpler method? A standard relation between standard
types and their OIDs?

If the answer to last question is "no", can I really trust at least the name?
If so, since I don't want to make the metadata query before each "regular"
query, I'll have to cache it. Is it OK to do it once per connection?

I can even think that.... is the user (admin) allowed to change the names
of standard types?

Another, more trivial question: do you know where to find nice logos
for postgres?

Thanks in advance


  Nico


http://www.clubdelphi.com/nico/


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Subject: a few additional JDBC points??

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