gurmukh singh created HIVE-14568:
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Summary: Hive Decimal Returns NULL
Key: HIVE-14568
URL: https://issues.apache.org/jira/browse/HIVE-14568
Project: Hive
Issue Type: Bug
Affects Versions: 1.2.0, 1.0.0
Environment: Centos 6.7, Hadoop 2.7.2
Reporter: gurmukh singh
Hi
I was under the impression that the bug:
https://issues.apache.org/jira/browse/HIVE-5022 got fixed. But, I see the same
issue in Hive 1.0 and hive 1.2 as well.
hive> desc mul_table;
OK
prc decimal(38,28)
vol decimal(38,10)
Time taken: 0.068 seconds, Fetched: 2 row(s)
hive> select prc, vol, prc*vol as cost from mul_table;
OK
1.2 200 NULL
1.44 200 NULL
2.14 100 NULL
3.004 50 NULL
1.2 200 NULL
Time taken: 0.048 seconds, Fetched: 5 row(s)
Rather then returning NULL, it should give error or round off.
I understand that, I can use Double instead of decimal or can cast it, but
still returning "Null" will make many things go unnoticed.
hive> desc mul_table2;
OK
prc double
vol decimal(14,10)
Time taken: 0.049 seconds, Fetched: 2 row(s)
hive> select * from mul_table2;
OK
1.4 200
1.34 200
7.34 100
7454533.354544 100
Time taken: 0.028 seconds, Fetched: 4 row(s)
hive> select prc, vol, prc*vol as cost from mul_table2;
OK
7.34 100 734.0
7.34 1000 7340.0
1.0004 1000 1000.4
7454533.354544 100 7.454533354544E8 <----- Wrong result
7454533.354544 1000 7.454533354544E9 <----- Wrong result
Time taken: 0.025 seconds, Fetched: 5 row(s)
Casting:
hive> select prc, vol, cast(prc*vol as decimal(38,10)) as cost from mul_table2;
OK
7.34 100 734
7.34 1000 7340
1.0004 1000 1000.4
7454533.354544 100 745453335.4544
7454533.354544 1000 7454533354.544
Time taken: 0.026 seconds, Fetched: 5 row(s)
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