Re: PostGres Doubt - Mailing list pgsql-hackers

From Bruce Momjian
Subject Re: PostGres Doubt
Date
Msg-id 200206122219.g5CMJvB17628@candle.pha.pa.us
Whole thread Raw
In response to Re: PostGres Doubt  ("Dann Corbit" <DCorbit@connx.com>)
Responses Re: PostGres Doubt  (Michael Meskes <meskes@postgresql.org>)
List pgsql-hackers
Dann Corbit 
> > I assume this is because you wrote your code assuming a feature was in
> > ecpg, but it wasn't, right?
> 
> I have written lots of programs that use embedded SQL.  I have (for
> instance) several ODBC drivers that use embedded SQL and C++ as part of
> an ODBC driver system.  I merrily coded away some stuff to do the same
> thing in PostgreSQL.  After all, I had already done it for several other
> systems and they all worked just about the same and the effort was
> minimal to change from one system to another.
> 
> So now, I started getting down to the details.  One global structure...
> I started a major rewrite to repair it.  Then (to my abject horror) I
> discovered there is no SQLCA at all.  Project abandoned (actually, just
> switched to libpq and everything was OK).


I see SQLCA mentioned in the ecpg code.  What am I not understanding?

> > > Here is what I would like to see (consider a gentle suggestion):
> > > 
> > > A reentrant version of ECPG that uses SQLCA and SQLDA like 
> > Oracle or Rdb
> > > or DB/2 or any of the professional database systems.
> > 
> > I see on the TODO list under ECPG:
> > 
> >         o Implement SQLDA
> >         o Add SQLSTATE
> > 
> > Are these related to your problem?  I see SQLCA in the ecpg code
> > already.  Is it implemented incorrectly?  If so, I could use items to
> > add to the TODO list.
> > 
> > You are actually the first person to complain about this, as far as I
> > can remember.
> 
> I doubt if many people are using it then.  There is a NIST SQL suite
> which should be run against it.  Have you heard of it?  It is a
> standardization for embedded SQL [and other facets of the SQL langauge].
> I think it would be very nice if the PostgreSQL team should try to
> incorporte the whole thing as part of their validation suite.  The
> project the uses embedded sql is in the folder /pc under the nist main
> folder.  Here is an example from that project that use sqlca:

Oh, that seems easy.  I know Michael will know the answer.

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
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