[jira] [Commented] (DRILL-5851) Empty table during a join operation with a non empty table produces cast exception

["Hanumath Rao Maduri (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DRILL-5851?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16195442#comment-16195442 ] 

Hanumath Rao Maduri commented on DRILL-5851:
--------------------------------------------

Even though it looks like a corner case, it can have an impact for readers which can push the data to the sources.
Ideally HashJoin operator should take care of handling these scenarios.

> Empty table during a join operation with a non empty table produces cast exception 
> -----------------------------------------------------------------------------------
>
>                 Key: DRILL-5851
>                 URL: https://issues.apache.org/jira/browse/DRILL-5851
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Execution - Relational Operators
>    Affects Versions: 1.11.0
>            Reporter: Hanumath Rao Maduri
>            Assignee: Hanumath Rao Maduri
>
> Hash Join operation on tables with one table empty and the other non empty throws an exception 
> {code} 
> Error: SYSTEM ERROR: DrillRuntimeException: Join only supports implicit casts between 1. Numeric data
>  2. Varchar, Varbinary data 3. Date, Timestamp data Left type: VARCHAR, Right type: INT. Add explicit casts to avoid this error
> {code}
> Here is an example query with which it is reproducible.
> {code}
> select * from cp.`sample-data/nation.parquet` nation left outer join dfs.tmp.`2.csv` as two on two.a = nation.`N_COMMENT`;
> {code}
> the contents of 2.csv is empty (i.e not even header info).



--
This message was sent by Atlassian JIRA
(v6.4.14#64029)