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Posted to issues-all@impala.apache.org by "Adam Tamas (Jira)" <ji...@apache.org> on 2020/03/09 10:38:00 UTC
[jira] [Work started] (IMPALA-7686) Allow RANGE() clause before
HASH() clause for PARTITION BY
[ https://issues.apache.org/jira/browse/IMPALA-7686?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Work on IMPALA-7686 started by Adam Tamas.
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> Allow RANGE() clause before HASH() clause for PARTITION BY
> ----------------------------------------------------------
>
> Key: IMPALA-7686
> URL: https://issues.apache.org/jira/browse/IMPALA-7686
> Project: IMPALA
> Issue Type: Improvement
> Components: Frontend
> Affects Versions: Impala 2.12.0
> Reporter: Gabor Kaszab
> Assignee: Adam Tamas
> Priority: Minor
> Labels: newbie
>
> Table creation succeeds this way:
> {code:java}
> CREATE TABLE test3
> (
> source_system_id BIGINT,
> id1 BIGINT,
> id2 BIGINT,
> name STRING,
> PRIMARY KEY (source_system_id,id1,id2)
> )
> PARTITION BY
> HASH(id1,id2) PARTITIONS 10,
> RANGE(source_system_id) (
> PARTITION VALUE = 10000000,
> PARTITION VALUE = 20000000,
> PARTITION VALUE = 30000000
> )
> STORED AS KUDU;
> {code}
> However, it fails with a syntax error if we swap the order of HASH() and RANGE():
> {code:java}
> CREATE TABLE test3
> (
> source_system_id BIGINT,
> id1 BIGINT,
> id2 BIGINT,
> name STRING,
> PRIMARY KEY (source_system_id,id1,id2)
> )
> PARTITION BY
> RANGE(source_system_id) (
> PARTITION VALUE = 10000000,
> PARTITION VALUE = 20000000,
> PARTITION VALUE = 30000000
> ),
> HASH(id1,id2) PARTITIONS 10
> STORED AS KUDU;
> {code}
> I think we shouldn't restrict the order of RANGE() and HASH().
> Check the relevant accepted syntax here:
> https://github.com/apache/impala/blob/6568e6e110e507f5228c1da11e56fd7117ab8a25/fe/src/main/cup/sql-parser.cup#L1416
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