Harsh J created HIVE-14593:
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Summary: 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):
{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:
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)
{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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