Stored Function Limitations
The following restrictions apply to stored functions.
- All of the restrictions listed in Stored Routine Limitations.
- Any statements that return a result set are not permitted. For example, a regular SELECTs is not permitted, but a SELECT INTO is. A cursor and FETCH statement is permitted.
FLUSH statements are not permitted.
- Statements that perform explicit or implicit commits or rollbacks are not permitted
- Cannot be used recursively.
- Cannot make changes to a table that is already in use (reading or writing) by the statement invoking the stored function.
- Cannot refer to a temporary table multiple times under different aliases, even in different statements.
- ROLLBACK TO SAVEPOINT and RELEASE SAVEPOINT statement which are in a stored function cannot refer to a savepoint which has been defined out of the current function.
- Prepared statements (PREPARE, EXECUTE, DEALLOCATE PREPARE) cannot be used, and therefore nor can statements be constructed as strings and then executed.
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