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Posted to issues@drill.apache.org by "Robert Hou (JIRA)" <ji...@apache.org> on 2017/03/22 00:51:41 UTC
[jira] [Commented] (DRILL-5086) ClassCastException when filter
pushdown is used with a bigint or float column and metadata caching.
[ https://issues.apache.org/jira/browse/DRILL-5086?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15935592#comment-15935592 ]
Robert Hou commented on DRILL-5086:
-----------------------------------
I have verified that the three SQL statements execute without errors.
The second SQL statement, however, does not prune enough partitions. I have created a new Jira, [DRILL-5374], to track this new problem.
> ClassCastException when filter pushdown is used with a bigint or float column and metadata caching.
> ---------------------------------------------------------------------------------------------------
>
> Key: DRILL-5086
> URL: https://issues.apache.org/jira/browse/DRILL-5086
> Project: Apache Drill
> Issue Type: Bug
> Components: Query Planning & Optimization
> Affects Versions: 1.9.0
> Reporter: Robert Hou
> Assignee: Parth Chandra
> Labels: ready-to-commit
> Fix For: 1.10.0
>
> Attachments: 0_0_1.parquet, 0_0_2.parquet, 0_0_3.parquet, 0_0_4.parquet, 0_0_5.parquet, drill.parquet_metadata
>
>
> This query results in a ClassCastException when filter pushdown is used with metadata caching. The bigint column is being compared with an integer value.
> 0: jdbc:drill:zk=10.10.100.186:5181/drill/rho> select count(\*) from orders_parts_metadata where bigint_id < 1100;
> Error: SYSTEM ERROR: ClassCastException: java.lang.Integer cannot be cast to java.lang.Long
> To reproduce the problem, put the attached files into a directory. Then create the metadata:
> refresh table metadata dfs.`path_to_directory`;
> For example, if you put the files in /drill/testdata/filter/orders_parts_metadata, then run this sql command
> refresh table metadata dfs.`/drill/testdata/filter/orders_parts_metadata`;
> A similar problem occurs when a float column is being compared with a double value.
> 0: jdbc:drill:zk=10.10.100.186:5181/drill/rho> select count(\*) from orders_parts_metadata where float_id < 1100.0;
> Error: SYSTEM ERROR: ClassCastException
> Also when a timestamp column is being compared with a string.
> 0: jdbc:drill:zk=10.10.100.186:5181/drill/rho> select count(\*) from orders_parts_metadata where timestamp_id < '2016-10-13';
> Error: SYSTEM ERROR: ClassCastException: java.lang.Integer cannot be cast to java.lang.Long
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