[jira] [Commented] (HIVE-14593) Non-canonical integer partition columns do not work with IN operations

["Gopal V (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HIVE-14593?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15429246#comment-15429246 ] 

Gopal V commented on HIVE-14593:
--------------------------------

bq. ALTER TABLE foo ADD PARTITION (b='07', c='08');

Is the right fix to do type safe partition creates instead of accepting strings there?

> Non-canonical integer partition columns do not work with IN operations
> ----------------------------------------------------------------------
>
>                 Key: HIVE-14593
>                 URL: https://issues.apache.org/jira/browse/HIVE-14593
>             Project: Hive
>          Issue Type: Bug
>          Components: Metastore
>    Affects Versions: 1.0.0
>            Reporter: Harsh J
>
> The below use-case no longer works (tested on a PostgresQL backed HMS using JDO as well as on a MySQL backed HMS with DirectSQL):
> {code}
> CREATE TABLE foo (a STRING) PARTITIONED BY (b INT, c INT);
> ALTER TABLE foo ADD PARTITION (b='07', c='08');
> LOAD DATA LOCAL INPATH '/etc/hostname' INTO TABLE foo PARTITION(b='07', c='08');
> -- Does not work if you provide a string IN variable:
> SELECT a, c FROM foo WHERE b IN ('07');
> (No rows selected)
> -- Works if you provide it in integer forms or canonical integer strings:
> SELECT a, c FROM foo WHERE b IN (07);
> (1 row(s) selected)
> SELECT a, c FROM foo WHERE b IN (7);
> (1 row(s) selected)
> SELECT a, c FROM foo WHERE b IN ('7');
> (1 row(s) selected)
> {code}
> This worked fine prior to HIVE-8099. The change of HIVE-8099 is inducing a double conversion on the partition column input, such that the IN GenericUDFIn now receives b's value as a column type converted canonical integer 7, as opposed to an as-is DB stored non-canonical value 07. Subsequently the GenericUDFIn again up-converts the b's value to match its argument's value types instead, making 7 (int) into a string "7". Then, "7" is compared against "07" which naturally never matches.
> As a regression, this breaks anyone upgrading pre-1.0 to 1.0 or higher.



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