NAME

Tangram::Driver::Pg - Orthogonal Object Persistence in PostgreSQL databases

SYNOPSIS

   use Tangram;
   use Tangram::Driver::Pg;
   $schema = Tangram::Driver::Pg->schema( $hashref );
   Tangram::Driver::Pg->deploy($schema, $dbh);
   $storage = Tangram::Driver::Pg->connect( $schema,
      $data_source, $username, $password );
   $storage->disconnect();
   Tangram::Driver::Pg->retreat($schema, $dbh);

DESCRIPTION

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

This module performs the following:

METHODS

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

ERRATA

Tangram::Type::Dump::Storable objects are first encoded with MIME::Base64, because Tangram does not currently have an easy mechanism for calling "DBI->bind_param()" at the appropriate time to flag the column as binary.

Tangram::Type::Dump::Perl objects are stored as "BYTEA" columns, which as of DBD::Pg 1.31, also do not get correctly escaped by the DBD driver. This also affects the (as-yet not fully functional) Tangram::Type::Dump::YAML back-end, which might put "\" characters into a YAML document.

It is recommended to use the "storable" type with Tangram::Type::Dump::Any for this reason.