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MMUSGROVE PHIPSTER PWBENNETT

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Mark Stosberg
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NAME

CGI::Session::Driver::postgresql - PostgreSQL driver for CGI::Session

SYNOPSIS

    use CGI::Session;
    $session = CGI::Session->new("driver:PostgreSQL", undef, {Handle=>$dbh});

DESCRIPTION

CGI::Session::PostgreSQL is a CGI::Session driver to store session data in a PostgreSQL table.

STORAGE

Before you can use any DBI-based session drivers you need to make sure compatible database table is created for CGI::Session to work with. Following command will produce minimal requirements in most SQL databases:

    CREATE TABLE sessions (
        id CHAR(32) NOT NULL PRIMARY KEY,
        a_session BYTEA NOT NULL
    );

and within your code use:

    use CGI::Session;
    $session = CGI::Session->new("driver:PostgreSQL", undef, {Handle=>$dbh, ColumnType=>"binary"});

Please note the ColumnType argument. PostgreSQL's text type has problems when trying to hold a null character. (Known as "\0" in Perl, not to be confused with SQL NULL). If you know there is no chance of ever having a null character in the serialized data, you can leave off the ColumnType attribute. Using a BYTEA column type and ColumnType => 'binary' is recommended when using Storable as the serializer or if there's any possibility that a null value will appear in any of the serialized data.

To use different column names, change the 'create table' statement, and then simply do this:

    $s = CGI::Session->new('driver:pg', undef,
    {
        TableName=>'session',
        IdColName=>'my_id',
        DataColName=>'my_data',
        DataSource=>'dbi:pg:dbname=project',
    });

or

    $s = CGI::Session->new('driver:pg', undef,
    {
        TableName=>'session',
        IdColName=>'my_id',
        DataColName=>'my_data',
        Handle=>$dbh,
    });

For more details see CGI::Session::Driver::DBI, parent class.

Also see sqlite driver, which exercises different method for dealing with binary data.

COPYRIGHT

Copyright (C) 2002 Cosimo Streppone. All rights reserved. This library is free software and can be modified and distributed under the same terms as Perl itself.

AUTHORS

Cosimo Streppone <cosimo@cpan.org>, heavily based on the CGI::Session::MySQL driver by Sherzod Ruzmetov, original author of CGI::Session.

Matt LeBlanc contributed significant updates for the 4.0 release.

LICENSING

For additional support and licensing see CGI::Session