[
https://issues.apache.org/jira/browse/HIVE-26778?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Krisztian Kasa resolved HIVE-26778.
-----------------------------------
Resolution: Fixed
> Pushdown Date data type to metastore via direct sql / JDO
> ---------------------------------------------------------
>
> Key: HIVE-26778
> URL: https://issues.apache.org/jira/browse/HIVE-26778
> Project: Hive
> Issue Type: Bug
> Components: Standalone Metastore
> Affects Versions: 4.0.0
> Reporter: Syed Shameerur Rahman
> Assignee: Syed Shameerur Rahman
> Priority: Major
> Labels: pull-request-available
> Time Spent: 2h 50m
> Remaining Estimate: 0h
>
> The original feature to push down date data type while doing partition
> pruning via direct sql/JDO was added as part of the jira :
> https://issues.apache.org/jira/browse/HIVE-5679
> Since the behavior of Hive has changed with CBO, Now when CBO is turned on,
> The date data types are not pushed down to metastore due to CBO adding extra
> keyword 'DATE' with the original filter since the filter parser is not
> handled to parse this extra keyword it fails and hence the date data type is
> not pushed down to the metastore.
> {code:java}
> select * from test_table where date_col = '2022-01-01';
> {code}
> When CBO is turned on, The filter predicate generated is
> date_col=DATE'2022-01-01' which the filter parser fails to recognize.
>
> *Steps to reproduce*
> The following query will generate "{color:#6a8759}Error parsing partition
> filter; lexer error"
> [https://github.com/apache/hive/blob/master/standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/PartFilterExprUtil.java#L128]{color}
>
> {color:#172b4d}When CBO is turned off (set hive.cbo.enable=false) we don't
> see this error message.{color}
> {code:java}
> create table part_time(a int) partitioned by(date_c date);
> insert into part_time partition(date_c='2000-01-01') values (1);
> insert into part_time partition(date_c='2000-02-01') values (1);
> insert into part_time partition(date_c='2000-03-01') values (1);
> select * from part_time where date_c = '2000-03-01';
> {code}
>
> *Performance Improvement*
> In my testing setup of table having *10k partitions* in the table. When we do
> a select query on one of the partitions without the change it was *300 ms*
> and after the change it was {*}14 ms{*}.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
