[jira] [Updated] (DRILL-2408) CTAS should not create empty folders when underlying query returns no results

["Deneche A. Hakim (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DRILL-2408?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Deneche A. Hakim updated DRILL-2408:
------------------------------------
    Summary: CTAS should not create empty folders when underlying query returns no results  (was: Invalid (0 length) parquet file created by CTAS)

> CTAS should not create empty folders when underlying query returns no results
> -----------------------------------------------------------------------------
>
>                 Key: DRILL-2408
>                 URL: https://issues.apache.org/jira/browse/DRILL-2408
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Storage - Writer
>    Affects Versions: 0.8.0
>            Reporter: Aman Sinha
>            Assignee: Deneche A. Hakim
>            Priority: Critical
>             Fix For: 0.9.0
>
>         Attachments: DRILL-2408.1.patch.txt, DRILL-2408.2.patch.txt, DRILL-2408.3.patch.txt
>
>
> We should not be creating 0 length parquet files; subsequent queries on these will fail with the error shown below. 
> {code}
> 0: jdbc:drill:zk=local> create table tt5 as select * from cp.`tpch/region.parquet` where 1=0;
> +------------+---------------------------+
> |  Fragment  | Number of records written |
> +------------+---------------------------+
> | 0_0        | 0                         |
> +------------+---------------------------+
> 1 row selected (0.8 seconds)
> 0: jdbc:drill:zk=local> select count(*) from tt5;
> Query failed: RuntimeException: file:/tmp/tt5/0_0_0.parquet is not a Parquet file (too small)
> Error: exception while executing query: Failure while executing query. 
> {code}



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