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https://issues.apache.org/jira/browse/DRILL-2244?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14326416#comment-14326416
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Mehant Baid commented on DRILL-2244:
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uploaded patch on reviewboard: https://reviews.apache.org/r/31160/
> Implicit cast between decimal data types is not implemented
> -----------------------------------------------------------
>
> Key: DRILL-2244
> URL: https://issues.apache.org/jira/browse/DRILL-2244
> Project: Apache Drill
> Issue Type: Improvement
> Components: Execution - Codegen
> Affects Versions: 0.8.0
> Reporter: Victoria Markman
> Assignee: Mehant Baid
> Attachments: DRILL-2244.patch
>
>
> I created two tables in drill with the following schema:
> t1.c1 - decimal(8,2)
> t2.c1 - decimal(18,4)
> Attempt to join on these columns produces run time error on not implemented
> compare function.
> Since we do support cast from INT to BIGINT, this behavior is inconsistent.
> {code}
> 0: jdbc:drill:schema=dfs> select * from x1, x2 where x1.c1 = x2.c1;
> Query failed: RemoteRpcException: Failure while running fragment., Failure
> finding function that runtime code generation expected. Signature:
> compare_to( DECIMAL9:OPTIONALDECIMAL18:OPTIONAL, ) returns INT:REQUIRED [
> 53049aa6-7165-4e5a-9dc5-9efa832b4e49 on atsqa4-134.qa.lab:31010 ]
> [ 53049aa6-7165-4e5a-9dc5-9efa832b4e49 on atsqa4-134.qa.lab:31010 ]
> Error: exception while executing query: Failure while executing query.
> (state=,code=0)
> {code}
> Explicit cast works:
> {code}
> 0: jdbc:drill:schema=dfs> select * from x1 left outer join x2 on cast(x1.c1
> as decimal(18,2)) = x2.c1;
> +------------+------------+
> | c1 | c10 |
> +------------+------------+
> | 1032.65 | null |
> +------------+------------+
> 1 row selected (0.137 seconds)
> {code}
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