Hello, If you use DOMAIN (CREATE DOMAIN) in pgsql, PostgreSqlPlatform generate a "new \Doctrine\DBAL\DBALException("Unknown database type ".$dbType." requested, " . get_class($this) . " may not support it.");" exception because it does not know the type "domain_name" (CREATE DOMAIN domain_name AS VARCHAR(80); ) With this patch, it checks if the given type (either normal type, either domain) is a domain, and if yes, takes the right info (domain_name is type varchar and complete_type character varying(80)). If it's not a domain, it takes the normal type. (patch -p0 doctrine2/lib/Doctrine/DBAL/Platforms/PostgreSqlPlatform.php < pgsql_domains.patch) Also, it's not the goal here, but the queries could be optimized using joins in place of auto join + where, but, as said, the speed is not the goal since the queries are there only for entities mapping. Hope it helps. Best regards, Raphaël Dehousse