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From "Aman Sinha (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DRILL-4376) Wrong results when doing a count(*) on part of directories with metadata cache
Date Mon, 14 Mar 2016 15:14:33 GMT

     [ https://issues.apache.org/jira/browse/DRILL-4376?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Aman Sinha updated DRILL-4376:
------------------------------
    Assignee: Deneche A. Hakim  (was: Aman Sinha)

> 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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