[
https://issues.apache.org/jira/browse/CASSANDRA-14505?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jeremiah Jordan resolved CASSANDRA-14505.
-----------------------------------------
Resolution: Duplicate
> Removal of last element on a List deletes the entire row
> --------------------------------------------------------
>
> Key: CASSANDRA-14505
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14505
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Environment: * Java: 1.8.0_171
> * SO: Ubuntu 18.04 LTS
> * Cassandra: 3.11.2
> Reporter: André Paris
> Assignee: Benjamin Lerer
> Priority: Major
>
> The behavior of an element removal from a list by an UPDATE differs by how
> the row was created:
> Given the table
> {{CREATE TABLE table_test (}}
> {{ id int PRIMARY KEY,}}
> {{ list list<text>}}
> {{)}}
> If the row is created by an INSERT, the row remains after the UPDATE to
> remove the last element on the list:
> {{cqlsh:ks_test> INSERT INTO table_test (id, list ) VALUES ( 1, ['foo']) ;}}
> {{cqlsh:ks_test> SELECT * FROM table_test;}}
> {{ id | list}}
> {{ ----+--------}}
> 1 | ['foo']
> {{(1 rows)}}
> {{cqlsh:ks_test> UPDATE table_test SET list = list - ['foo'] WHERE id=1;}}
> {{cqlsh:ks_test> SELECT * FROM table_test;}}
> {{ id | list}}
> {{ ----+------}}
> {{ 1 | null}}
> {{(1 rows)}}
>
> But, if the row is created by an UPDATE, the row is deleted after the UPDATE
> to remove the last element on the list:
> {{cqlsh:ks_test> UPDATE table_test SET list = list + ['foo'] WHERE id=2;}}
> {{cqlsh:ks_test> SELECT * FROM table_test;}}
> {{ id | list}}
> {{ ----+---------}}
> 2 | ['foo']
> {{(1 rows)}}
> {{cqlsh:ks_test> UPDATE table_test SET list = list - ['foo'] WHERE id=2;}}
> {{cqlsh:ks_test> SELECT * FROM table_test;}}
> {{ id | list}}
> {{ ----+------}}
> {{(0 rows)}}
>
> Thanks in advance.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
---------------------------------------------------------------------
To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org
For additional commands, e-mail: commits-h...@cassandra.apache.org
