Include view for User Defined Functions (UDFs)

[proddata]

With 4.5.0 UDFs became available in all versions. Right now one has to know where to look for existing UDFs defined in the information_schema.routines table like so:

SELECT
  routine_schema,
  routine_name,
  specific_name,
  data_type,
  routine_definition,
  routine_body
FROM information_schema.routines
where routine_body = 'javascript';

Feature description

• Integrate a view in the AdminUI similar to the ones for SQL views, listing all available UDFs (definition, input and output data types) and a convenient way to replace an existing UDF
• Optional: List usage of UDFs in tables / views (e.g. generated columns)