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Syed Shameerur Rahman updated HIVE-26778: ----------------------------------------- Affects Version/s: 4.0.0 > 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: 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)