(1) A strongly typed, high-performance function that is integral to the DB2 database. A built-in function can be referenced in SQL statements anywhere that an expression is valid. See also function, routine.
(2) In programming languages, a function that is predefined by the compiler and whose code is incorporated directly into the compiled object rather than called at run time.
(3) A function for which the compiler automatically generates inline code at compile time instead of making a runtime call to the function. See also function.
(4) A function that is generated by DB2 and that is in the SYSIBM schema. See also cast function, external function, user-defined function, SQL function, sourced function.