[jira] [Assigned] (HIVE-24840) Materialized View incremental rebuild produces wrong result set after compaction

["Krisztian Kasa (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-24840?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Krisztian Kasa reassigned HIVE-24840:
-------------------------------------


> Materialized View incremental rebuild produces wrong result set after compaction
> --------------------------------------------------------------------------------
>
>                 Key: HIVE-24840
>                 URL: https://issues.apache.org/jira/browse/HIVE-24840
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Krisztian Kasa
>            Assignee: Krisztian Kasa
>            Priority: Critical
>
> {code}
> create table t1(a int, b varchar(128), c float) stored as orc TBLPROPERTIES ('transactional'='true');
> insert into t1(a,b, c) values (1, 'one', 1.1), (2, 'two', 2.2), (NULL, NULL, NULL);
> create materialized view mat1 stored as orc TBLPROPERTIES ('transactional'='true') as 
>             select a,b,c from t1 where a > 0 or a is null;
> delete from t1 where a = 1;
> alter table t1 compact 'major';
> -- Wait until compaction finished.
> alter materialized view mat1 rebuild;
> {code}
> Expected result of query
> {code}
> select * from mat1;
> {code}
> {code}
> 2 two 2
> NULL NULL NULL
> {code}
> but if incremental rebuild is enabled the result is
> {code}
> 1 one 1
> 2 two 2
> NULL NULL NULL
> {code}
> Cause: Incremental rebuild queries whether the source tables of a materialized view has delete or update transaction since the last rebuild from metastore from COMPLETED_TXN_COMPONENTS table. However when a major compaction is performed on the source tables the records related to these tables are deleted from COMPLETED_TXN_COMPONENTS.



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