IBM Books

Application Development Guide


UDF Concepts

The following is a discussion of the important concepts you need to know prior to coding UDFs:

The concept of function path, the SET CURRENT FUNCTION PATH statement, and the function selection algorithm are discussed in detail in the SQL Reference. The FUNCPATH precompile and bind options are discussed in detail in the Command Reference.

For information about the concept of mapping UDFs and built-in functions to data source functions in a federated system, refer to the SQL Reference. For guidelines on creating such mappings, refer to Invoking Data Source Functions.


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