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SAP Sybase SQL Anywhere 16.0 » SQL Anywhere Server - SQL Usage » Stored procedures, triggers, batches, and user-defined functions » User-defined functions


Advanced information about user-defined functions

SQL Anywhere treats all user-defined functions as idempotent unless they are declared NOT DETERMINISTIC. Idempotent functions return a consistent result for the same parameters and are free of side effects. Two successive calls to an idempotent function with the same parameters return the same result, and have no unwanted side effects on the query's semantics.

For more information about non-deterministic and deterministic functions, see Function caching.