[jira] [Commented] (CASSANDRA-5141) Can not insert an empty map.

["Marcin Szymaniuk (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-5141?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13573335#comment-13573335 ] 

Marcin Szymaniuk commented on CASSANDRA-5141:
---------------------------------------------

Its letting me execute the insert with empty mup but that doesnt really inserting the map. Example:
insert into users(id,surname,favs) values('key123','justAString',{});
select * from users where id='key123';

id     | favs | surname
--------+------+-------------
key123 | null | justAString

The question is is this what you aggreed for? Its a bit misleading for me - inserting an empty map means that have some semantic but I loose it. 

The MapOperation.doPut method doesnt seem to care about empty map at all - its just iterating through a map. If its empty it does nothing.
                
> Can not insert an empty map. 
> -----------------------------
>
>                 Key: CASSANDRA-5141
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5141
>             Project: Cassandra
>          Issue Type: Bug
>    Affects Versions: 1.2.0
>            Reporter: Krzysztof Cieslinski Cognitum
>            Assignee: Sylvain Lebresne
>            Priority: Minor
>             Fix For: 1.2.1
>
>         Attachments: 5141.txt
>
>
> It is not possible to insert an empty map. It looks like the "{}" is reserved only for Set.
> So when for table:
> {code}
> CREATE TABLE users (
>     id text PRIMARY KEY,
>     surname text,
>     favs map<text, text>
> )
> {code}
> I try to insert map without any elements:
> {code}
> cqlsh:test> insert into users(id,surname,favs) values('aaa','aaa',{});
> {code}
> I get:
> {code}
>  Bad Request: Set operations are only supported on Set typed columns, but org.apache.cassandra.db.marshal.MapType(org.apache.cassandra.db.marshal.UTF8Type,org.apache.cassandra.db.marshal.UTF8Type) given.
> text could not be lexed at line 1, char 63
> {code}

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