Add support for passing application_name into connect

[mrmuskrat]

When I try to pass application_name as a connection parameter as documented in the libpq-connect docs I get an error: invalid connection option "application_name"

I know... It's not documented to work in DBD::Pg but it should. Java and Python can set it and Perl should be able to as well!

If I can set $ENV{PGAPPNAME} soon enough in the process that usually works but it's not always feasible to do so.

In the meantime, I'm issuing a SET application_name = 'foo' after connection (via DBIx::Class::Storage::DBI's on_connect_do/connect_info, scroll up to see the real-life examples).

[mrmuskrat]

It should also work with a service connection file too.

[ilmari]

Which version of DBD::Pg and libpq are you using? That error message is from libpq, but it has supported application_name since version 9.0.

1> my $dbh = DBI->connect("dbi:Pg:application_name=reply")
$res[1] = bless( {}, 'DBI::db' )

2> $dbh->selectrow_array('show application_name')
$res[2] = 'reply'

3> DBD::Pg->VERSION 
$res[3] = '3.13.0'

6> $dbh->{pg_lib_version}
$res[4] = 120003

[mrmuskrat]

I feel like an idiot now. We're moving our applications around and I should have checked the original containers. We somehow have an older version of libpq where I was trying to test and I didn't notice.

Sorry about that.

On 2/6/2021 11:37:32 AM, Dagfinn Ilmari Mannsåker notifications@github.com wrote:

Which version of DBD::Pg and libpq are you using? That error message is from libpq, but it has supported application_name since version 9.0.

1> my $dbh = DBI->connect("dbi:Pg:application_name=reply") $res[1] = bless( {}, 'DBI::db' )

2> $dbh->selectrow_array('show application_name') $res[2] = 'reply'

3> DBD::Pg->VERSION $res[3] = '3.13.0'

6> $dbh->{pg_lib_version} $res[4] = 120003

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