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Date: Tue, 12 Jan 1999 10:55:23 -0500
From: Byron Nikolaidis <byronn@insightdist.com>
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To: sferac@bo.nettuno.it
Cc: "pgsql-interfaces@postgreSQL.org" <pgsql-interfaces@postgreSQL.org>
Subject: Re: [INTERFACES] PSQLODBC and TRANSACTIONS
References: <369B1C13.9E56EE17@sferacarta.com>
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Jose' Soares wrote:

> Hi,
>
> I'm trying transactions using M$-access and PSQLODBC without success,
> Seems that backend locks itself
> by opening two connections to work on the same table.
>
> I have a table with 3 rows:
>
> codice  nome            cap
> ---------------------------
> 1       pippo           0
> 2       pluto           0
> 3       topolino        0
> ---------------------------
>

The logfile shows that Access is using Manual Commit.   The last two lines show a separate connection
being made and then a select statement on "operatori" table.  But it is still locked from the other
connection.  (see below)

I don't think there is anything the driver can do about this.  You need Vladim's new locking code!   I
think that is going to be in the next version of Postgres.

Byron

<Highlights from the logfile>
BEGIN
UPDATE "operatori" SET "cap"='1' WHERE "codice" = '1  '
SELECT "codice","cap"  FROM "operatori"  WHERE "codice" = '3  '
UPDATE "operatori" SET "cap"='1' WHERE "codice" = '3  '
SELECT "codice","cap"  FROM "operatori"  WHERE "codice" = '2  '
UPDATE "operatori" SET "cap"='1' WHERE "codice" = '2  '

<Another connection is created here>
SQLDriverConnect(out)='DSN=PostgreSQL;DATABASE=hygea;SERVER=verde;PORT=5432;UID=marco;PWD=;READONLY=0;PROTOCOL=6.4;FAKEOIDINDEX=0;SHOWOIDCOLUMN=0;ROWVERSIONING=0;SHOWSYSTEMTABLES=0;CONNSETTINGS=set+ksqo+to+%27on%27%3b'

<This one hangs it>
SELECT "operatori"."codice" FROM "operatori"