Обсуждение: Obtain Serial Value
I am using VB6+ADO+ODBC with pgSQL.
I need to obtain the value of a serial field (autogenerated) inmediatly after I do a INSERT query. How can I do?
You should try SELECT MAX( <fieldname> ) FROM <tablename>; ??
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Timothy Reed
tareed@gmail.com
On 2/8/06, Sistemas C.M.P. <sistemascmp@redynet4.com.ar > wrote:
I am using VB6+ADO+ODBC with pgSQL.I need to obtain the value of a serial field (autogenerated) inmediatly after I do a INSERT query. How can I do?
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Timothy Reed
tareed@gmail.com
Try using SELECT currval('sequenc_name');
From the docs:
Return the value most recently obtained by
nextval for this sequence in the current session. (An error is reported if nextval has never been called for this sequence in this session.) Notice that because this is returning a session-local value, it gives a predictable answer whether or not other sessions have executed nextval since the current session did.This should be much faster than SELECT max(... and transaction safe.
Regards,
Ben
-----Original Message-----You should try SELECT MAX( <fieldname> ) FROM <tablename>; ??
From: pgsql-odbc-owner@postgresql.org [mailto:pgsql-odbc-owner@postgresql.org] On Behalf Of Timothy Reed
Sent: 08 February 2006 14:32
To: Sistemas C.M.P.
Cc: pgsql-odbc@postgresql.org
Subject: Re: [ODBC] Obtain Serial ValueOn 2/8/06, Sistemas C.M.P. <sistemascmp@redynet4.com.ar > wrote:I am using VB6+ADO+ODBC with pgSQL.I need to obtain the value of a serial field (autogenerated) inmediatly after I do a INSERT query. How can I do?
--
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Timothy Reed
tareed@gmail.com
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.. or use a "stored procedure" aka function...
CREATE OR REPLACE FUNCTION hela_add_programm(pm_programmname
"varchar")
RETURNS int4 AS
$BODY$ declare NewProgrammID integer;
Begin
select into NewProgrammID nextval('programm_idprogramm_seq');
Insert Into programm(idprogramm,programmname) values
(NewProgrammID,pm_Programmname);
Return NewProgrammID;
end;
$BODY$
LANGUAGE 'plpgsql' VOLATILE;
--
_____________________________________________
Hela Gewürzwerk Hermann Laue GmbH & Co.KG
EDV
Thomas Holschen
Beimoorweg 11
22926 Ahrensburg
Tel. : +49 4102/496-381
http://www.hela-food.de
_____________________________________________
>>> "Sistemas C.M.P." <sistemascmp@redynet4.com.ar> schrieb am
Mittwoch, 8. Februar
2006 um 15:03 in Nachricht
<005601c62cb8$606b57d0$1601a8c0@pcsistemas>:
> I am using VB6+ADO+ODBC with pgSQL.
> I need to obtain the value of a serial field (autogenerated)
inmediatly
> after I do a INSERT query. How can I do?
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