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From "Duarte Nunes (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-13730) Dropping a table doesn't drop its dropped columns
Date Tue, 25 Jul 2017 18:06:00 GMT
Duarte Nunes created CASSANDRA-13730:
----------------------------------------

             Summary: Dropping a table doesn't drop its dropped columns
                 Key: CASSANDRA-13730
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13730
             Project: Cassandra
          Issue Type: Bug
            Reporter: Duarte Nunes


I'm not sure if this is intended or not, but currently a table's dropped columns are not dropped
when the table itself is dropped:

{noformat}
cqlsh> create keyspace ks WITH replication={ 'class' : 'SimpleStrategy', 'replication_factor'
: 1 } ;
cqlsh> use ks;
cqlsh:ks> create table  test (pk text primary key, c1 int);
cqlsh:ks> alter table test drop c1;
cqlsh:ks> drop table test;
cqlsh:ks> select * from system_schema.dropped_columns where keyspace_name = 'ks' and table_name
= 'test';

 keyspace_name | table_name | column_name | dropped_time                    | kind    | type
---------------+------------+-------------+---------------------------------+---------+------
            ks |       test |          c1 | 2017-07-25 17:53:47.651000+0000 | regular |  int

(1 rows)
{noformat}

This can have surprising consequences when creating another table with the same name.



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