(1) A function, method, or procedure that has its routine logic implemented in a programming language application that resides outside the database, in the file system of the database server. The association of the routine with the external code application is specified by the EXTERNAL clause in the CREATE statement for the routine. See also external function, external procedure, external method, routine.
(2) In REXX, a program external to the user's program, language processor, or both. These routines can be written in any language (including REXX) that supports the system-dependent interfaces used by REXX to start it.
(3) A user-defined function or stored procedure that is based on code that is written in an external programming language.