[jira] [Commented] (CASSANDRA-13186) Create index fails if the primary key is included, but docs claim it is supported

["Benjamin Lerer (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-13186?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17418525#comment-17418525 ] 

Benjamin Lerer commented on CASSANDRA-13186:
--------------------------------------------

[~Gerrrr] It is a validation issue. You are hitting this [check|https://github.com/apache/cassandra/blob/cassandra-3.11/src/java/org/apache/cassandra/cql3/statements/CreateIndexStatement.java#L130] whereas I believe that you should hit this [on|https://github.com/apache/cassandra/blob/cassandra-3.11/src/java/org/apache/cassandra/cql3/statements/CreateIndexStatement.java#L196].

> Create index fails if the primary key is included, but docs claim it is supported
> ---------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-13186
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13186
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Legacy/CQL
>            Reporter: Ariel Weisberg
>            Assignee: Aleksandr Sorokoumov
>            Priority: Normal
>
> {noformat}
> cqlsh:foo> CREATE TABLE users (
>        ...   userid text PRIMARY KEY,
>        ...   first_name text,
>        ...   last_name text,
>        ...   emails set<text>,
>        ...   top_scores list<int>,
>        ...   todo map<timestamp, text>
>        ... );
> cqlsh:foo> create index bar on foo.users (userid, last_name);
> InvalidRequest: Error from server: code=2200 [Invalid query] message="Cannot create secondary index on partition key column userid"
> {noformat}
> {quote}
> <beobal> yes, it's a bug in CreateIndexStatement. The check to enforce the PK has only a single component is wrong
> it considers each target in isolation, so it doesn't take into account that you might be creating a custom index on a PK component + something else
> {quote}
> http://docs.datastax.com/en/cql/3.3/cql/cql_reference/cqlCreateIndex.html
> {quote}
> Cassandra supports creating an index on most columns, excluding counter columns but including a clustering column of a compound primary key or on the partition (primary) key itself. 
> {quote}



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