[jira] [Comment Edited] (CALCITE-4655) NullPointerException in JdbcTable.scan

["Ulrich Kramer (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CALCITE-4655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17366382#comment-17366382 ] 

Ulrich Kramer edited comment on CALCITE-4655 at 6/21/21, 5:10 AM:
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I changed the implementation to use {{Suppliers.memoize}}


was (Author: kramerul):
I changed the implementation to use \{{Suppliers.memoize}}

> NullPointerException in JdbcTable.scan
> --------------------------------------
>
>                 Key: CALCITE-4655
>                 URL: https://issues.apache.org/jira/browse/CALCITE-4655
>             Project: Calcite
>          Issue Type: Improvement
>    Affects Versions: 1.26.0, 1.27.0
>            Reporter: Ulrich Kramer
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> Calling {{JdbcTable.scan}} will result in a {{NullPointerException}} because inside {{JdbcTable.fieldClasses}}  {{protoRowType}} is null.
> This could easily be fixed by replacing
> {code:java}
>  final RelDataType rowType = requireNonNull(protoRowType, "protoRowType").apply(typeFactory);
> {code}
> with
> {code:java}
>  final RelDataType rowType = getRowType(typeFactory);
> {code}



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