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Posted to issues@flink.apache.org by "sunjincheng (JIRA)" <ji...@apache.org> on 2017/08/13 23:31:00 UTC
[jira] [Comment Edited] (FLINK-7358) Add implicitly converts
support for User-defined function
[ https://issues.apache.org/jira/browse/FLINK-7358?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16125083#comment-16125083 ]
sunjincheng edited comment on FLINK-7358 at 8/13/17 11:30 PM:
--------------------------------------------------------------
[~fhueske] Yes, Agree with you. I had open the PR in calcite(https://issues.apache.org/jira/browse/CALCITE-1908). And do some communication and discussion with julian.
BTW. welcome you to join in the discussion. :-).
was (Author: sunjincheng121):
[~fhueske] Yes, Agree with you. I had open the PR in calcite. And do some communication and discussion with julian.
BTW. welcome you to join in the discussion. :-).
> Add implicitly converts support for User-defined function
> ----------------------------------------------------------
>
> Key: FLINK-7358
> URL: https://issues.apache.org/jira/browse/FLINK-7358
> Project: Flink
> Issue Type: Improvement
> Components: Table API & SQL
> Reporter: sunjincheng
> Assignee: sunjincheng
>
> Currently if user defined a UDF as follows:
> {code}
> object Func extends ScalarFunction {
> def eval(a: Int, b: Long): String = {
> ...
> }
> }
> {code}
> And if the table schema is (a: Int, b: int, c: String), then we can not call the UDF `Func('a, 'b)`. So
> I want add implicitly converts when we call UDF. The implicitly convert rule is:
> BYTE_TYPE_INFO -> SHORT_TYPE_INFO -> INT_TYPE_INFO -> LONG_TYPE_INFO -> FLOAT_TYPE_INFO -> DOUBLE_TYPE_INFO
> *Note:
> In this JIRA. only for TableAPI, And SQL will be fixed in https://issues.apache.org/jira/browse/CALCITE-1908.*
> What do you think? [~fhueske]
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