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Posted to commits@cassandra.apache.org by "Benjamin Lerer (Jira)" <ji...@apache.org> on 2021/07/01 15:24:00 UTC
[jira] [Commented] (CASSANDRA-14564) issue while adding a column in
a table with compact storage
[ https://issues.apache.org/jira/browse/CASSANDRA-14564?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17372880#comment-17372880 ]
Benjamin Lerer commented on CASSANDRA-14564:
--------------------------------------------
[~VincentWhite] as mentioned in CASSANDRA-13920 we do not allow adding columns to other type of COMPACT tables. It makes more sense to me to go for the solution sugested in CASSANDRA-13920 which is to reject the statement as invalid, specially considering that COMPACT tables are now deprecated.
Are you interested in providing a patch for it?
> issue while adding a column in a table with compact storage
> --------------------------------------------------------------
>
> Key: CASSANDRA-14564
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14564
> Project: Cassandra
> Issue Type: Bug
> Components: Legacy/Core, Legacy/CQL
> Reporter: Laxmikant Upadhyay
> Assignee: Vincent White
> Priority: Normal
> Fix For: 3.11.x
>
>
> I have upgraded my system from cassandra 2.1.16 to 3.11.2. We had some tables with COMPACT STORAGE enabled. We see some weird behaviour of cassandra while adding a column into it.
> Cassandra does not give any error while altering however the added column is invisible.
> Same behaviour when we create a new table with compact storage and try to alter it. Below is the commands ran in sequence:
>
> {code:java}
> x@cqlsh:xuser> CREATE TABLE xuser.employee(emp_id int PRIMARY KEY,emp_name text, emp_city text, emp_sal varint, emp_phone varint ) WITH COMPACT STORAGE;
> x@cqlsh:xuser> desc table xuser.employee ;
> CREATE TABLE xuser.employee (
> emp_id int PRIMARY KEY,
> emp_city text,
> emp_name text,
> emp_phone varint,
> emp_sal varint
> ) WITH COMPACT STORAGE
> AND bloom_filter_fp_chance = 0.01
> AND caching = {'keys': 'ALL', 'rows_per_partition': 'NONE'}
> AND comment = ''
> AND compaction = {'class': 'org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy', 'max_threshold': '32', 'min_threshold': '4'}
> AND compression = {'chunk_length_in_kb': '64', 'class': 'org.apache.cassandra.io.compress.LZ4Compressor'}
> AND crc_check_chance = 1.0
> AND dclocal_read_repair_chance = 0.1
> AND default_time_to_live = 0
> AND gc_grace_seconds = 864000
> AND max_index_interval = 2048
> AND memtable_flush_period_in_ms = 0
> AND min_index_interval = 128
> AND read_repair_chance = 0.0
> AND speculative_retry = '99PERCENTILE';{code}
> Now altering the table by adding a new column:
>
> {code:java}
> x@cqlsh:xuser> alter table employee add profile text;
> x@cqlsh:xuser> desc table xuser.employee ;
> CREATE TABLE xuser.employee (
> emp_id int PRIMARY KEY,
> emp_city text,
> emp_name text,
> emp_phone varint,
> emp_sal varint
> ) WITH COMPACT STORAGE
> AND bloom_filter_fp_chance = 0.01
> AND caching = {'keys': 'ALL', 'rows_per_partition': 'NONE'}
> AND comment = ''
> AND compaction = {'class': 'org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy', 'max_threshold': '32', 'min_threshold': '4'}
> AND compression = {'chunk_length_in_kb': '64', 'class': 'org.apache.cassandra.io.compress.LZ4Compressor'}
> AND crc_check_chance = 1.0
> AND dclocal_read_repair_chance = 0.1
> AND default_time_to_live = 0
> AND gc_grace_seconds = 864000
> AND max_index_interval = 2048
> AND memtable_flush_period_in_ms = 0
> AND min_index_interval = 128
> AND read_repair_chance = 0.0
> AND speculative_retry = '99PERCENTILE';
> {code}
> notice that above desc table result does not have newly added column profile. However when i try to add it again it gives column already exist;
> {code:java}
> x@cqlsh:xuser> alter table employee add profile text;
> InvalidRequest: Error from server: code=2200 [Invalid query] message="Invalid column name profile because it conflicts with an existing column"
> x@cqlsh:xuser> select emp_name,profile from employee;
> emp_name | profile
> ----------+---------
> (0 rows)
> x@cqlsh:xuser>
> {code}
> Inserting also behaves strange:
> {code:java}
> x@cqlsh:xuser> INSERT INTO employee (emp_id , emp_city , emp_name , emp_phone , emp_sal ,profile) VALUES ( 1, 'ggn', 'john', 123456, 50000, 'SE');
> InvalidRequest: Error from server: code=2200 [Invalid query] message="Some clustering keys are missing: column1"
> x@cqlsh:xuser> INSERT INTO employee (emp_id , emp_city , emp_name , emp_phone , emp_sal ,profile,column1) VALUES ( 1, 'ggn', 'john', 123456, 50000, 'SE',null);
> x@cqlsh:xuser> select * from employee;
> emp_id | emp_city | emp_name | emp_phone | emp_sal
> --------+----------+----------+-----------+---------
> (0 rows)
> {code}
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