[jira] [Created] (IMPALA-6069) Incorrect handling of Nan with join and codegen

["Thomas Tauber-Marshall (JIRA)" <ji...@apache.org>]

Thomas Tauber-Marshall created IMPALA-6069:
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             Summary: Incorrect handling of Nan with join and codegen
                 Key: IMPALA-6069
                 URL: https://issues.apache.org/jira/browse/IMPALA-6069
             Project: IMPALA
          Issue Type: Bug
          Components: Backend
    Affects Versions: Impala 2.11.0
            Reporter: Thomas Tauber-Marshall
            Priority: Critical


Repro:
{noformat}
> create table test (col0 float);
> insert into test values (0), (cast('nan' as float));
> select * from test a, test b where a.col0 = b.col0;
+------+------+
| col0 | col0 |
+------+------+
| 0    | 0    |
| NaN  | NaN  |
+------+------+
> set disable_codegen=true;
> select * from test a, test b where a.col0 = b.col0;
+------+------+
| col0 | col0 |
+------+------+
| 0    | 0    |
+------+------+
{noformat}
I think the version without codegen is the intended behavior (because 'Nan' = 'Nan' is false)



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