=head1 NAME

Tangram::mysql - Orthogonal Object Persistence in Mysql databases

=head1 SYNOPSIS

   use Tangram;
   use Tangram::mysql;

   $schema = Tangram::mysql->schema( $hashref );

   Tangram::mysql->deploy($schema, $dbh);
      
   $storage = Tangram::mysql->connect( $schema,
      $data_source, $username, $password );

   $storage->disconnect();

   Tangram::mysql->retreat($schema, $dbh);

=head1 DESCRIPTION

This is the entry point in the mysql-specific object-relational
persistence backend.

This backend makes use of Mysql extensions SELECT GET_LOCK, SELECT
RELEASE_LOCK and LAST_INSERT_ID to safely allocate object ids in the
absence of transactions.

The vanilla Relational backend may not be used with Mysql databases in
multiprogramming context.

=head1 METHODS

This backend does not add any methods; for a description of
available methods, see L<Tangram::Relational>.