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https://issues.apache.org/jira/browse/DRILL-2462?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14362087#comment-14362087
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Rahul Challapalli commented on DRILL-2462:
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Also when we have a query which uses a function which makes a column required,
isNullable should return false. I can give an example of such a function if
needed.
The JDBC spec is not very clear on the behavior of isNullable when used with
functions. I tested with postgres and postgres returns 'false' for derived
columns which are non-nullable.
I can raise a different issue for this if it has a different priority than the
original one.
> JDBC : ResultSetMetaData.isNullable returns true even when the column is a
> required one
> ---------------------------------------------------------------------------------------
>
> Key: DRILL-2462
> URL: https://issues.apache.org/jira/browse/DRILL-2462
> Project: Apache Drill
> Issue Type: Bug
> Components: Client - JDBC
> Reporter: Rahul Challapalli
> Assignee: Daniel Barclay (Drill)
> Priority: Critical
> Attachments: fewtypes.parquet
>
>
> git.commit.id.abbrev=7b4c887
> I attached a parquet file in which all the columns are required
> {code}
> /root/parquet-tools-1.5.1-SNAPSHOT/parquet-tools schema fewtypes.parquet
> message root {
> required int32 int_col;
> required int64 bigint_col;
> required int32 date_col (DATE);
> required int32 time_col (TIME);
> required int64 timestamp_col (TIMESTAMP);
> required binary interval_col (UTF8);
> required binary varchar_col (UTF8);
> required float float_col;
> required double double_col;
> required boolean bool_col;
> }
> {code}
> However ResultSetMetaData.isNullable returns true for these columns.
> Let me know if you need anythig
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