Unlock the Power of User Defined Function in SQL

UDF also called user defined function. The create function statement creates a user-defined function. You can write it in C, PL1, Cobol, Assembler, etc.

User defined function in SQL

Here is a Table function, which created a Table ‘DOCMTCH’

CREATE FUNCTION DOCMATCH (VARCHAR(30), VARCHAR(255))
  RETURNS TABLE (DOC_ID CHAR(16), DOC_ABSTRACT VARCHAR(5000))
  EXTERNAL NAME 'DOCMTCH'
  LANGUAGE COBOL
  PARAMETER STYLE SQL
  READS SQL DATA
  DETERMINISTIC
  NO EXTERNAL ACTION
  FENCED
  SCRATCHPAD
  FINAL CALL
  DISALLOW PARALLEL
  CARDINALITY 20;

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