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The WAIPA Conference has always been a very special event because of its focus on practical and pragmatic issues and the wide participation of investment practitioners , representing not only public institutions but also the private sector . Globalization brings both rights and responsibilities . If the backend is running under the postmaster , error messages are still sent to the frontend process as well as to OutputFile , but debugging output is sent to the controlling tty of the postmaster ( since only one file descriptor can be sent to an actual file ) . It is common for a frontend that sends NOTIFY to be listening on the same notify name itself . The indexes are merely an implementational aid which each RDBMS offers you , in order to cause commonly used queries to be done more efficiently .