Database Compatibility for Oracle Developers Guide v12

Database Compatibility for Oracle means that an application runs in an Oracle environment as well as in the EDB Postgres Advanced Server (Advanced Server) environment with minimal or no changes to the application code. Developing an application that is compatible with Oracle databases in the Advanced Server requires special attention to which features are used in the construction of the application. For example, developing a compatible application means choosing compatible:

• System and built-in functions for use in SQL statements and procedural logic.
• Stored Procedure Language (SPL) when creating database server-side application logic for stored procedures, functions, triggers, and packages.
• Data types that are compatible with Oracle databases
• SQL statements that are compatible with Oracle SQL
• System catalog views that are compatible with Oracle’s data dictionary

For detailed information about the compatible SQL syntax, data types, and views, see SQL reference.

The compatibility offered by the procedures and functions that are part of the Built-in packages is documented in Built-in packages.

For information about using the compatible tools and utilities (EDB*Plus, EDB*Loader, DRITA, and EDB*Wrap) that are included with an EDB Postgres Advanced Server installation, see Tools, utilities, and components.

For applications written using the Oracle Call Interface (OCI), EDB’s Open Client Library (OCL) provides interoperability with these applications. For detailed information about using the Open Client Library, see the EDB Postgres Advanced Server OCL Connector Guide.