Writing a Function Module

Go Up to Working with UDFs and Blob Filters

To create a user-defined function (UDF), you code the UDF in a host language, then build a shared function library that contains the UDF. You must then use DECLARE EXTERNAL FUNCTION to declare each individual UDF to each database where you need to it. Each UDF needs to be declared to each database only once.

Topics

• Writing a UDF
• Thread-safe UDFs