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From "Michael Edge (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-10719) Inconsistencies within CQL 'describe', and CQL docs/'help describe'
Date Tue, 17 Nov 2015 13:38:11 GMT
Michael Edge created CASSANDRA-10719:
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             Summary: Inconsistencies within CQL 'describe', and CQL docs/'help describe'
                 Key: CASSANDRA-10719
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10719
             Project: Cassandra
          Issue Type: Improvement
          Components: CQL, Documentation and Website
            Reporter: Michael Edge
            Priority: Minor
             Fix For: 3.x


While investigating the issue Cassandra-9678 I noticed a number of inconsistencies in the
way 'describe' operates, so I'm opening a new issue to address these. This issue will also
address Cassandra-9678.

I'd be happy to work on this.

There are a number of inconsistencies in the way 'describe' operates within cqlsh, and also
in the 'help describe' description within cqlsh compared to the CQL documentation (at http://docs.datastax.com/en/cql/3.3/cql/cql_reference/describe_r1.html)

For example, 'desc functions' will list all functions for all keyspaces regardless of whether
there is a current keyspace or not, whereas 'desc tables' or 'desc types' will list only the
tables or types for the current keyspace.

Some commands exist in cqlsh that are not in the CQL documentation, nor in the 'help describe'
description. For example, 'desc functions' is a valid CQLSH command but does not appear in
either the CQL docs or 'help describe'.

I suggest we align the way the 'describe' command works so that it works consistently regardless
of whether it is describing a table, type, function or any other database object, and also
update the CQL and 'help describe' docs to match. Since 'describe tables' and it's variants
has been around the longest we should probably align other 'describe' commands to 'describe
tables'.

My preliminary analysis has shown at least the following inconsistencies:

- 'desc functions' (with current keyspace), differs from 'desc tables' and 'desc types'.
- a number of commands are missing from the CQL docs or 'help describe, such as: desc table
<keyspace>.<tablename>, desc functions (no current keyspace), desc function <function
name>, desc type <keyspace>.<type name>, etc.




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