5.6.2 Obtaining User-Defined Function Information

The mysql.func system table shows which UDFs have been registered using CREATE FUNCTION:

SELECT * FROM mysql.func;

The func table has these columns:

• name

  The UDF name as referred to in SQL statements.

• ret

  The UDF return value type. Permitted values are 0 (STRING), 1 (REAL), 2 (INTEGER), 3 (ROW), or 4 (DECIMAL).

• dl

  The name of the UDF library file containing the executable UDF code. The file is located in the directory named by the plugin_dir system variable.

• type

  The UDF type, either function (scalar) or aggregate.