> So, my questions:
> Is it possible to use COPY FROM STDIN with JDBC?

Should be. Its at least possible using DBI and DBD::Pg (perl)


my $copy_sth = $dbh -> prepare( "COPY
general.datamining_mailing_lists (query_id,email_key) FROM STDIN;") ;
$copy_sth -> execute();
while (my ($email_key ) = $fetch_sth -> fetchrow_array ()) {
$dbh -> func("$query_id\t$email_key\n", 'putline');
}
$fetch_sth -> finish();
$dbh -> func("\\.\n", 'putline');
$dbh -> func('endcopy');
$copy_sth->finish();

Some JDBC expert would tell better how its done with JDBC.


> Will it bring performance improvement compared to SELECT UNION solution?

COPY is quite faast.

Regds
mallah.

>
> many thanks in advance,
> Jens Schipkowski
>
> --
> **
> APUS Software GmbH
>
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