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https://issues.apache.org/jira/browse/DRILL-4376?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15197701#comment-15197701
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ASF GitHub Bot commented on DRILL-4376:
---------------------------------------
Github user adeneche closed the pull request at:
https://github.com/apache/drill/pull/422
> Wrong results when doing a count(*) on part of directories with metadata cache
> ------------------------------------------------------------------------------
>
> Key: DRILL-4376
> URL: https://issues.apache.org/jira/browse/DRILL-4376
> Project: Apache Drill
> Issue Type: Bug
> Components: Metadata
> Affects Versions: 1.4.0
> Reporter: Deneche A. Hakim
> Assignee: Deneche A. Hakim
> Priority: Critical
> Fix For: 1.7.0
>
>
> First create some parquet tables in multiple subfolders:
> {noformat}
> create table dfs.tmp.`test/201501` as select employee_id, full_name from
> cp.`employee.json` limit 2;
> create table dfs.tmp.`test/201502` as select employee_id, full_name from
> cp.`employee.json` limit 2;
> create table dfs.tmp.`test/201601` as select employee_id, full_name from
> cp.`employee.json` limit 2;
> create table dfs.tmp.`test/201602` as select employee_id, full_name from
> cp.`employee.json` limit 2;
> {noformat}
> Running the following query gives the expected count:
> {noformat}
> select count(*) from dfs.tmp.`test/20160*`;
> +---------+
> | EXPR$0 |
> +---------+
> | 4 |
> +---------+
> {noformat}
> But once you create the metadata cache files, the query no longer returns the
> correct results:
> {noformat}
> refresh table metadata dfs.tmp.`test`;
> select count(*) from dfs.tmp.`test/20160*`;
> +---------+
> | EXPR$0 |
> +---------+
> | 2 |
> +---------+
> {noformat}
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