[jira] [Created] (CASSANDRA-9665) Improve handling of UDF and UDA metadata

["Aleksey Yeschenko (JIRA)" <ji...@apache.org>]

Aleksey Yeschenko created CASSANDRA-9665:
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             Summary: Improve handling of UDF and UDA metadata
                 Key: CASSANDRA-9665
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9665
             Project: Cassandra
          Issue Type: Improvement
            Reporter: Aleksey Yeschenko
            Assignee: Aleksey Yeschenko
             Fix For: 3.0 beta 1


A while ago we decided to make all functions and types keyspace local, but haven't updated our assumption in the code accordingly.

One consequence is that in addition to {{Schema}} and {{KSMetaData}} we got ourselves a completely separate registry singleton for built-in functions, UDFs, and UDAs - the {{Functions}} class.

The linked branch makes UDAs and UDFs be a part of {{KSMetaData}}, as they should be, and gets rid of the old {{Functions}} class.

A new {{Functions}} class is introduced - an immutable container for a given keyspace's functions, and all the definitions are now spread between the keyspaces.

This sneaks in a bit of {{CASSANDRA-9425}}, makes {{CASSANDRA-9367}} easier, and is a minore pre-requisite for a proper implementation of {{CASSANDRA-6717}}.

On top of Sylvain's 8099 branch, with CASSANDRA-9542 cherry-picked.



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