Gopal V created HIVE-7266:
-----------------------------
Summary: Optimized HashTable with vectorized map-joins results in
String columns extending
Key: HIVE-7266
URL: https://issues.apache.org/jira/browse/HIVE-7266
Project: Hive
Issue Type: Bug
Components: Vectorization
Affects Versions: 0.14.0
Reporter: Gopal V
Assignee: Jitendra Nath Pandey
The following query returns different results when both vectorized mapjoin and
the new optimized hashtable are enabled.
{code}
hive> set hive.vectorized.execution.enabled=false;
hive> select s_suppkey, n_name from supplier, nation where s_nationkey =
n_nationkey limit 25;
...
316869 JAPAN
1636869 RUSSIA
1096869 IRAN
7236869 RUSSIA
2276869 INDIA
8516869 ARGENTINA
2636869 MOZAMBIQUE
3836869 ROMANIA
2616869 FRANCE
{code}
But when vectorization is enabled, the results are
{code}
316869 JAPAN
1636869 RUSSIA
1096869 IRANIA
7236869 RUSSIA
2276869 INDIAA
8516869 ARGENTINA
2636869 MOZAMBIQUE
3836869 ROMANIAQUE
2616869 FRANCEAQUE
{code}
When the new optimized map-join hashtable is disabled as well
{code}
hive> set hive.vectorized.execution.enabled=true;
hive> set hive.mapjoin.optimized.hashtable=false;
hive> select s_suppkey, n_name from supplier, nation where s_nationkey =
n_nationkey limit 25;
316869 JAPAN
1636869 RUSSIA
1096869 IRAN
7236869 RUSSIA
2276869 INDIA
8516869 ARGENTINA
2636869 MOZAMBIQUE
3836869 ROMANIA
2616869 FRANCE
{code}
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