[ 
https://issues.apache.org/jira/browse/KUDU-3564?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Alexey Serbin updated KUDU-3564:
--------------------------------
    Affects Version/s: 1.16.0

> Range specific hashing table when queried with InList predicate may lead to 
> incorrect results
> ---------------------------------------------------------------------------------------------
>
>                 Key: KUDU-3564
>                 URL: https://issues.apache.org/jira/browse/KUDU-3564
>             Project: Kudu
>          Issue Type: Bug
>    Affects Versions: 1.16.0, 1.17.0
>            Reporter: YifanZhang
>            Priority: Major
>             Fix For: 1.18.0, 1.17.1
>
>
> Reproduce steps that copy from the Slack channel:
>  
> {code:sql}
> -- create the table and data in Impala:
> CREATE TABLE age_table
> (
> id BIGINT,
> name STRING,
> age INT,
> PRIMARY KEY(id,name,age)
> )
> PARTITION BY HASH (id) PARTITIONS 4,
> HASH (name) PARTITIONS 4,
> range (age)
> ( 
> PARTITION 30 <= VALUES < 60,
> PARTITION 60 <= VALUES < 90
> ) 
> STORED AS KUDU 
> TBLPROPERTIES ('kudu.num_tablet_replicas' = '1');
> ALTER TABLE age_table ADD RANGE PARTITION 90<= VALUES <120
> HASH(id) PARTITIONS 3 HASH(name) PARTITIONS 3;
> INSERT INTO age_table VALUES (3, 'alex', 50);
> INSERT INTO age_table VALUES (12, 'bob', 100);
> {code}
> Now, let's run a few queries using the {{kudu table scan}} CLI tool:
> {noformat}
> # This query produces wrong results: the expected row for 'bob' isn't 
> returned.
> # Note that the troublesome row is in the range partition with custom 
> (per-range) hash schema.
> $ sudo -u kudu kudu table scan <master.url> default.age_table -columns=id,age 
> -predicates='["AND", ["IN", "id", [12,20]]]'
> Total count 0 cost 0.0224966 seconds
> # This query produces correct results: the expected row for 'alex' is 
> returned.
> $ sudo -u kudu kudu table scan <master.url> default.age_table -columns=id,age 
> -predicates='["AND", ["IN", "id", [3,20]]]'
> (int64 id=3, int32 age=50)
> Total count 1 cost 0.0178102 seconds
> # However, predicates on the primary key columns seem to work as expected, 
> even for the rows in the range with custom hash schema.
> $ sudo -u kudu kudu table scan <master.url> default.age_table -columns=id,age 
> -predicates='["AND", ["=", "id", 12]]'
> (int64 id=12, int32 age=100)
> Total count 1 cost 0.0137217 seconds
> {noformat}



--
This message was sent by Atlassian Jira
(v8.20.10#820010)

Reply via email to