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From "Philip Thompson (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-11805) Row deleted when value updated to null
Date Tue, 17 May 2016 01:03:12 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-11805?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Philip Thompson updated CASSANDRA-11805:
----------------------------------------
    Priority: Major  (was: Critical)

> Row deleted when value updated to null
> --------------------------------------
>
>                 Key: CASSANDRA-11805
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-11805
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>         Environment: C* 3.5, both single node and cluster, C* 3.6 snapshot single node
>            Reporter: Jaroslav Kamenik
>
> It seems that the behaviour of the value update to null differs when row is created by
insert or update. When it is inserted the row stays and the value is null, when updated the
row is deleted.
> Simple example:
> Inserts:
> create table aaa (a ascii, b ascii, c ascii, primary key (a,b));
> insert into aaa (a,b,c) values ('a','b','c');
> insert into aaa (a,b,c) values ('a','c','d');
> insert into aaa (a,b,c) values ('a','d','e');
> select * from aaa;
>  a | b | c
> ---+---+---
>  a | b | c
>  a | c | d
>  a | d | e
> update aaa set c = null where a='a' and b='b';
> select * from aaa;
>  a | b | c
> ---+---+------
>  a | b | null
>  a | c |    d
>  a | d |    e
> Updates:
> create table bbb (a ascii, b ascii, c ascii, primary key (a,b));
> update bbb set c = 'c' where a='a' and b='b';
> update bbb set c = 'd' where a='a' and b='c';
> update bbb set c = 'e' where a='a' and b='d';
> select * from bbb;
>  a | b | c
> ---+---+---
>  a | b | c
>  a | c | d
>  a | d | e
> update bbb set c = null where a='a' and b='b';
> select * from bbb;
>  a | b | c
> ---+---+---
>  a | c | d
>  a | d | e



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