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From "Michael Shuler (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-8203) Unexpected null static column
Date Wed, 29 Oct 2014 16:43:34 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-8203?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14188549#comment-14188549
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Michael Shuler commented on CASSANDRA-8203:
-------------------------------------------

Could you attach an example INSERT to populate some data that reproduces this issue? I am
unable to. Here's what I did for a quick try, and my select queries did not contain any nulls:

{noformat}
echo "CREATE KEYSPACE iss WITH replication = {'class': 'SimpleStrategy', 'replication_factor':
1};" | cqlsh
echo "CREATE TABLE iss.target_state ( cell ascii, host ascii, service ascii, active ascii,
cell_etag timeuuid static, etag timeuuid, states map<ascii, ascii>, PRIMARY KEY (cell,
host, service) ) WITH CLUSTERING ORDER BY (host ASC, service ASC);" | cqlsh
for i in `seq 1 2000`; do echo "INSERT INTO iss.target_state (cell, host, service, active,
cell_etag, etag, states) VALUES ('cell${i}', 'host${i}', 'service${i}', 'active${i}', now(),
now(), {'map${i}' : 'map${i}'});"; done | cqlsh
{noformat}

Was this schema created as specified from day 1, or was it altered along the way?

> Unexpected null static column
> -----------------------------
>
>                 Key: CASSANDRA-8203
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8203
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Alexander Sterligov
>
> I'm using static column.
> When I select whole table (with large limit) some of rows contain null static column
value, but it cannot happen accoring to application logic.
> When I select same row using keys, static column has non-null value as expected.
> Schema:
> {quote}
> cqlsh:iss> describe table target_state;
> CREATE TABLE iss.target_state (
>     cell ascii,
>     host ascii,
>     service ascii,
>     active ascii,
>     cell_etag timeuuid static,
>     etag timeuuid,
>     states map<ascii, ascii>,
>     PRIMARY KEY (cell, host, service)
> ) WITH CLUSTERING ORDER BY (host ASC, service ASC)
>     AND bloom_filter_fp_chance = 0.01
>     AND caching = '\{"keys":"ALL", "rows_per_partition":"NONE"}'
>     AND comment = ''
>     AND compaction = \{'min_threshold': '4', 'unchecked_tombstone_compaction': 'true',
'tombstone_compaction_interval': '43200', 'class': 'org.apache.cassandra.db.compaction.LeveledCompactionStrategy',
'max_threshold': '32'}
>     AND compression = \{'sstable_compression': 'org.apache.cassandra.io.compress.LZ4Compressor'}
>     AND dclocal_read_repair_chance = 0.1
>     AND default_time_to_live = 0
>     AND gc_grace_seconds = 86400
>     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 = '99.0PERCENTILE';
> {quote}
> Whole table query:
> {quote}
> cqlsh:iss> select cell, host, service, cell_etag, etag from target_state LIMIT 50000;
> {quote}
> Contains in the middle of results:
> {quote}
> 60630000000065955650000000063097470000054552016:ya(200,15) |  ams1-0003.search.yandex.net
|   18265 |                                 null | 737a05e0-5532-11e4-bf0b-efa731c31cd0
> {quote}
> Query of a single row gives non-null cell_etag column:
> {quote}
> cqlsh:iss> select host, service, cell_etag, etag from target_state where cell = '60630000000065955650000000063097470000054552016:ya(200,15)'
and host = 'ams1-0003.search.yandex.net' and service = '18265';
>  host                        | service | cell_etag                            | etag
> -----------------------------+---------+--------------------------------------+--------------------------------------
>  ams1-0003.search.yandex.net |   18265 | bc635e60-5ec3-11e4-bdfd-9f65487c7454 | 737a05e0-5532-11e4-bf0b-efa731c31cd0
> (1 rows)
> {quote}



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