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https://issues.apache.org/jira/browse/IMPALA-7588?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16620613#comment-16620613
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Zoltán Borók-Nagy commented on IMPALA-7588:
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I pushed in the revert of IMPALA-7477 to the ASF repo:
[https://github.com/apache/impala/commit/109028e89ce27880cc2ef69a7a5032c05df4d4df]
> incorrect HS2 null handling introduced by IMPALA-7477
> -----------------------------------------------------
>
> Key: IMPALA-7588
> URL: https://issues.apache.org/jira/browse/IMPALA-7588
> Project: IMPALA
> Issue Type: Bug
> Components: Backend
> Reporter: Tim Armstrong
> Assignee: Tim Armstrong
> Priority: Blocker
> Labels: correctness
>
> [~boroknagyz] reported this issue with the HS2 endpoint:
> Reproduction:
> {noformat}
> create table null_table (int_field int, float_field float, double_field
> double, string_field string);
> insert into table null_table values (1, 3.14, 3.14, 'abc'), (2, 4.12, 4.12,
> 'def'), (NULL, NULL, NULL, NULL);
> {noformat}
> From JDBC client (only tried Hive JDBC client)
> {noformat}
> select * from null_table;
> 0 | 0.0 | 0.0 | null
> 2 | 4.12 | 4.12 | 'def'
> 0 | 0.0 | 0.0 |
> {noformat}
> The bug is with handling of nulls in the conversion functions, specifically
> output_row_idx isn't incremented.
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