[jira] [Updated] (CASSANDRA-5489) Fix 2.0 key and column aliases serialization and cqlsh DESC SCHEMA

["Sylvain Lebresne (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-5489?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sylvain Lebresne updated CASSANDRA-5489:
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    Attachment: 5489.txt

I had forgotten this. Anyway, attaching simple patch for trunk that 1) add a sanity check to validate that we do have either all or no aliases and that 2) write an empty json list in the case we have none.
                
> Fix 2.0 key and column aliases serialization and cqlsh DESC SCHEMA
> ------------------------------------------------------------------
>
>                 Key: CASSANDRA-5489
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5489
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core, Tools
>    Affects Versions: 2.0 beta 1
>            Reporter: Aleksey Yeschenko
>            Assignee: Sylvain Lebresne
>            Priority: Minor
>             Fix For: 2.0 beta 1
>
>         Attachments: 5489-1.2.txt, 5489.txt, 5489.txt
>
>
> CASSANDRA-5125 made a slight change to how key_aliases and column_aliases are serialized in schema. Prior to that we never kept nulls in the the json pseudo-lists. This does break cqlsh and probably breaks 1.2 nodes receiving such migrations as well. The patch reverts this behavior and also slightly modifies cqlsh itself to ignore non-regular columns from system.schema_columns table.
> This patch breaks nothing, since 2.0 already handles 1.2 non-null padded alias lists.

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