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https://issues.apache.org/jira/browse/CASSANDRA-14505?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
André Paris updated CASSANDRA-14505:
------------------------------------
Description:
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.
was:
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)}}
Thans in advance.
> 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
> Priority: Major
> Fix For: 3.11.x
>
>
> 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.
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