Check a user-defined function (UDF)
In cqlsh, the DESCRIBE FUNCTION
command outputs the full details of a user-defined function.
Use the output from the DESCRIBE command to recreate the UDF.
This command requires a keyspace. Ideally you have also created a function, but it isn’t required.
Verify that a UDF exists:
DESCRIBE FUNCTION cycling.flog;The response is the CREATE FUNCTION command that was used to create the function if it exists.
Otherwise, the response indicates that the function doesn’t exist.
CREATE FUNCTION cycling.flog(input double)
CALLED ON NULL INPUT
RETURNS double
LANGUAGE java
AS $$ return Double.valueOf(Math.log(input.doubleValue())); $$;