Re: Using SELECT inside a COPY transaction with PHP - Mailing list pgsql-general

From Tom Lane
Subject Re: Using SELECT inside a COPY transaction with PHP
Date
Msg-id 8773.1090422201@sss.pgh.pa.us
Whole thread Raw
In response to Using SELECT inside a COPY transaction with PHP  (Robert Fitzpatrick <robert@webtent.com>)
List pgsql-general
Robert Fitzpatrick <robert@webtent.com> writes:
> I tried posting this to PHP-DB list, but no answers since yesterday. I'm
> thinking it is not possible, but just trying to confirm. I am using
> pg_exec($dbh, "COPY sometable FROM stdin USING DELIMITERS"). Once this
> the connectino is made and this line has been issued, my script begins
> analyzing each line of the CSV file and needs to do a SELECT statement
> using some of the fields in the line to find other related data before
> calling pg_end_copy($dbh), which syncs the data. Can another pg_exec
> call be made for a SELECT statement before the COPY is over? My script
> seems to hang at the point of the first SELECT.

You'd have to open a second database connection to issue the SELECT on.
Your first one is tied up doing the COPY (the connection protocol is
not multi-threaded or anything like that).

            regards, tom lane

pgsql-general by date:

Previous
From:
Date:
Subject: Locking with foreign key constraints
Next
From: "Markus Wollny"
Date:
Subject: Re: tsearch2, ispell, utf-8 and german special characters