JBoss Community Archive (Read Only)

Teiid 8.12

User Defined Functions

If you need to extend Teiid's scalar or aggregate function library, then Teiid provides a means to define custom or User Defined Functions(UDF).

The following are used to define a UDF.

Even Pushdown required functions need to be added as a UDF to allow Teiid to properly parse and resolve the function. Pushdown scalar functions differ from normal user-defined functions in that no code is provided for evaluation in the engine. An exception will be raised if a pushdown required function cannot be evaluated by the appropriate source.

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