Xuefu Zhang created HIVE-5726:
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Summary: The DecimalTypeInfo instance associated with a decimal
constant is not in line with the precision/scale of the constant
Key: HIVE-5726
URL: https://issues.apache.org/jira/browse/HIVE-5726
Project: Hive
Issue Type: Improvement
Reporter: Xuefu Zhang
Assignee: Xuefu Zhang
Currently Hive uses a default decimal type info instance to associate with a
decimal constant in the expression tree. To precisely determine the
precision/scale of the expression result requires more accurate precision/scale
of the type of the decimal constant. Thus, Hive uses a precision/scale of the
constant for the type info instance. As an example, the following is not
desirable:
{code}
hive> create table mytable as select 3.14BD as t from person_age limit 1;
hive> desc mytable;
OK
t decimal(65,30) None
Time taken: 0.08 seconds, Fetched: 1 row(s)
{code}
instead, the precision/scale for t above should be (3.2).
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