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Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
Some databases support user-defined functions, which can be embedded in any SQL statement, if you're using jOOQ's code generator. Let's say you have the following simple function in Oracle SQL:
CREATE OR REPLACE FUNCTION echo (INPUT NUMBER) RETURN NUMBER IS BEGIN RETURN INPUT; END echo;
The above function will be made available from a generated Routines class. You can use it like any other column expression:
SELECT echo(1) FROM DUAL WHERE echo(2) = 2
Note that user-defined functions returning CURSOR or ARRAY data types can also be used wherever table expressions can be used, if they are unnested
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