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https://issues.apache.org/jira/browse/CASSANDRA-10910?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15154040#comment-15154040
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Gábor Auth commented on CASSANDRA-10910:
----------------------------------------
I've upgraded to datastax-ddc-3.3.0 and... here is a materialized view:
{code}
> DESCRIBE MATERIALIZED VIEW unit_by_transport ;
CREATE MATERIALIZED VIEW unit_by_transport AS
SELECT *
FROM unit
WHERE transportid IS NOT NULL AND type IS NOT NULL
PRIMARY KEY (transportid, id)
WITH CLUSTERING ORDER BY (id ASC)
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}
I cannot reproduce this but sometimes and somehow happened the same issue:
{code}
> SELECT transportid, id, type FROM unit_by_transport WHERE
> transportid=24f90d20-d61f-11e5-9d3c-8fc3ad6906e2 and
> id=99c05a70-d686-11e5-a169-97287061d5d1;
transportid | id |
type
--------------------------------------+--------------------------------------+------
24f90d20-d61f-11e5-9d3c-8fc3ad6906e2 | 99c05a70-d686-11e5-a169-97287061d5d1 |
null
(1 rows)
> SELECT transportid, id, type FROM unit WHERE
> id=99c05a70-d686-11e5-a169-97287061d5d1;
transportid | id | type
-------------+----+------
(0 rows)
{code}
Any idea behind this behavior? :)
> Materialized view remained rows
> -------------------------------
>
> Key: CASSANDRA-10910
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10910
> Project: Cassandra
> Issue Type: Bug
> Environment: Cassandra 3.0.0
> Reporter: Gábor Auth
> Assignee: Carl Yeksigian
> Fix For: 3.0.3, 3.3
>
>
> I've created a table and a materialized view.
> {code}
> > CREATE TABLE test (id text PRIMARY KEY, key text, value int);
> > CREATE MATERIALIZED VIEW test_view AS SELECT * FROM test WHERE key IS NOT
> > NULL PRIMARY KEY(key, id);
> {code}
> I've put a value into the table:
> {code}
> > update test set key='key', value=1 where id='id';
> > select * from test; select * from test_view ;
> id | key | value
> ----+-----+-------
> id | key | 1
> (1 rows)
> key | id | value
> -----+----+-------
> key | id | 1
> (1 rows)
> {code}
> I've updated the value without specified the key of the materialized view:
> {code}
> > update test set value=2 where id='id';
> > select * from test; select * from test_view ;
> id | key | value
> ----+-----+-------
> id | key | 2
> (1 rows)
> key | id | value
> -----+----+-------
> key | id | 2
> (1 rows)
> {code}
> It works as I think...
> ...but I've updated the key of the materialized view:
> {code}
> > update test set key='newKey' where id='id';
> > select * from test; select * from test_view ;
> id | key | value
> ----+--------+-------
> id | newKey | 2
> (1 rows)
> key | id | value
> --------+----+-------
> key | id | 2
> newKey | id | 2
> (2 rows)
> {code}
> ...I've updated the value of the row:
> {code}
> > update test set key='newKey', value=3 where id='id';
> > select * from test; select * from test_view ;
> id | key | value
> ----+--------+-------
> id | newKey | 3
> (1 rows)
> key | id | value
> --------+----+-------
> key | id | 2
> newKey | id | 3
> (2 rows)
> {code}
> ...I've deleted the row by the id key:
> {code}
> > delete from test where id='id';
> > select * from test; select * from test_view ;
> id | key | value
> ----+-----+-------
> (0 rows)
> key | id | value
> -----+----+-------
> key | id | 2
> (1 rows)
> {code}
> Is it a bug?
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