[jira] [Commented] (BEAM-960) JdbcIO should infer coder when possible (such as via RowMapper)

["Jean-Baptiste Onofré (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/BEAM-960?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15656256#comment-15656256 ] 

Jean-Baptiste Onofré commented on BEAM-960:
-------------------------------------------

Thanks [~kenn], it makes sense. I will do the improvement (I think we can consider as an improvement more than a bug in Jira, right ?).

> JdbcIO should infer coder when possible (such as via RowMapper)
> ---------------------------------------------------------------
>
>                 Key: BEAM-960
>                 URL: https://issues.apache.org/jira/browse/BEAM-960
>             Project: Beam
>          Issue Type: Bug
>          Components: sdk-java-extensions
>            Reporter: Kenneth Knowles
>            Assignee: Jean-Baptiste Onofré
>
> There are a few ways that we typically do this:
> # Inspect the static args of the class implementing {{RowMapper}} to determine the output type, then consult the coder registry. This method is more limited and not lambda-friendly.
> # For the a "functional interface" version, like {{RowMapper}} that allows setting the output type descriptor.
> # Also provide an abstract class-based version, for example accepting a {{SimpleFunction}} that will automatically have a rich output type descriptor.



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