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https://issues.apache.org/jira/browse/CALCITE-1581?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16721037#comment-16721037
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Lai Zhou commented on CALCITE-1581:
-----------------------------------
[~julianhyde] , I extended the native enummerable implemention of calcite to
support Hive sql ,include UDF、UDAF and all the SqlSpecialOperator,which
inspired by apache Drills.
I modified the parser,type systems,and bridge the hive operator .
How do you think of supporting a direct implemention of hive sql like this?
I think it will be valueable when someone want to migrate his hive etl jobs to
real-time scene.I opened a new issure to disccuss it, please see
https://issues.apache.org/jira/browse/CALCITE-2741
> UDTF like in hive
> -----------------
>
> Key: CALCITE-1581
> URL: https://issues.apache.org/jira/browse/CALCITE-1581
> Project: Calcite
> Issue Type: New Feature
> Reporter: Xiaoyong Deng
> Assignee: Sihua Zhou
> Priority: Major
> Labels: udtf
>
> Support one row in and multi-column/multi-row out(one-to-many mapping), just
> like udtf in hive.
> The query would like this:
> {code}
> select
> func(c0, c1) as (f0, f1, f2)
> from table_name;
> {code}
> c0 and c1 are 'table_name' columns. f0, f1 and f2 are new generated columns.
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