[jira] [Commented] (CASSANDRA-7379) updating a row with composite key with a null value removes the entire row

["Mikhail Stepura (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-7379?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14028157#comment-14028157 ] 

Mikhail Stepura commented on CASSANDRA-7379:
--------------------------------------------

duplicate of CASSANDRA-6951?

> updating a row with composite key with a null value removes the entire row
> --------------------------------------------------------------------------
>
>                 Key: CASSANDRA-7379
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7379
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Ashot Golovenko
>            Assignee: Michael Shuler
>            Priority: Critical
>
> create a table
> CREATE TABLE relation (
>     u1 bigint,
>     u2 bigint,
>     mf int,
>     PRIMARY KEY (u1, u2));
> insert value:
> UPDATE relation SET mf = 1 WHERE u1 = 1 and u2 = 2;
> SELECT * from relation ;
>  u1 | u2 | mf
> ----+----+----
>   1 |  2 |  1
> insert null value:
> UPDATE relation SET mf = null WHERE u1 = 1 and u2 = 2;
> SELECT * from relation ;
> (0 rows) <--- WRONG!
> The INSERT statement however works:
> INSERT INTO relation (u1, u2, mf) VALUES (1, 2, null); 
> SELECT * from relation ;
>  u1 | u2 | mf
> ----+----+------
>   1 |  2 | null
> (1 rows)
>  



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