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From "Rahul Challapalli (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-2464) JDBC : ResultSet.wasNull always returns false for all datatypes
Date Sun, 15 Mar 2015 22:43:38 GMT

    [ https://issues.apache.org/jira/browse/DRILL-2464?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14362603#comment-14362603
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Rahul Challapalli commented on DRILL-2464:
------------------------------------------

Since drill cannot read null values from text files, I tried to read them hive tables. Even
in that case wasNull returned false. For varchar drill is returning an empty string for null.

> JDBC : ResultSet.wasNull always returns false for all datatypes
> ---------------------------------------------------------------
>
>                 Key: DRILL-2464
>                 URL: https://issues.apache.org/jira/browse/DRILL-2464
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Client - JDBC
>            Reporter: Rahul Challapalli
>            Assignee: Daniel Barclay (Drill)
>         Attachments: fewtypes_null.parquet
>
>
> git.commit.id.abbrev=7b4c887
> I attached a parquet file which has nulls in it. 
> {code}
> while (rs.next()) {
>     rs.getLong(1);
>     if (rs.wasNull()) {
>        // DRILL does not come here even when the column value is null
>     }
> }
> {code}
> I am not entirely sure if this is a duplicate to DRILL-2136. But here I have seen this
happen for all data types.



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