As you all know, EDB Failover Manager(EFM) provides the high availability insfrastructure for EDB Postgres clusters. Failover Manager monitors the members of a Postgres cluster, identifies and verifies database failures quickly and reliably, and if needed promotes a standby node to become the cluster master and issues alerts.
Every release of EFM has new features and functionalities and to take benefit of it you may need to upgrade your existing cluster to new version.
plpgsql_check extension helps developers to validate all embeded SQL and SQL statements inside plpgsql function. Its one of the useful extensions particularly when working with plpgsql development. For more details refer to plpgsql_check documentation.
By default, plpgsql_check extension not enabled in community PostgreSQL or commercial EDB Postgres. You need compile the extension with your flavor database. Community PostgreSQL compilation is easy and documented in the above reference link, however below steps help you to compile with commercial EDB Postgres database.
In short about EnterpriseDB product PostgresPlus Advanced Server, its built upon PostgreSQL community version with Oracle-Compatibility features and its ability to run with existing Oracle applications without any re-coding(typically required in migration) and allow enterprises to enjoy the benefit of the Open source database with PostgresPlus Advanced Server.
As PostgresPlus Advanced Server 9.3 Beta built upon community PostgreSQL 9.3 Betafeature, thence varied Oracle-Compatiblity features introduced in BETA unleash, like Oracle-style syntaxes, packages, SQL function etc.