Xuefu Zhang created HIVE-5800:
---------------------------------
Summary: Hive is inconsistent when handling strings in arithmetic
operations
Key: HIVE-5800
URL: https://issues.apache.org/jira/browse/HIVE-5800
Project: Hive
Issue Type: Bug
Components: Types
Affects Versions: 0.12.0
Reporter: Xuefu Zhang
Assignee: Xuefu Zhang
Currently Hive is inconsistent in dealing with strings involved in arithmetic
operations. For instance:
{code}
hive> desc test;
OK
i int None
b boolean None
d double None
s string None
dec decimal(5,2) None
Hive> explain select dec/s from test;
...
STAGE PLANS:
Stage: Stage-1
Map Reduce
Alias -> Map Operator Tree:
test
TableScan
alias: test
Select Operator
expressions:
expr: (dec / s)
type: decimal(65,30)
outputColumnNames: _col0
hive> explain select dec*s from test;
...
STAGE PLANS:
Stage: Stage-1
Map Reduce
Alias -> Map Operator Tree:
test
TableScan
alias: test
Select Operator
expressions:
expr: (dec * s)
type: double
{code}
MySQL consistently treats string in arithmetic operations as double and derives
the operator result type accordingly. Hive should also be consistent.
{code}
{code}
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