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https://issues.apache.org/jira/browse/HIVE-13380?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15323348#comment-15323348
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Sergey Shelukhin commented on HIVE-13380:
-----------------------------------------
Per SQL92:
{noformat}
5.3
<exact numeric literal> ::=
<unsigned integer> [ <period> [ <unsigned integer> ] ]
| <period> <unsigned integer>
<approximate numeric literal> ::= <mantissa> E <exponent>
13)The data type of an <exact numeric literal> is exact numeric.
The precision of an <exact numeric literal> is the number of
<digit>s that it contains. The scale of an <exact numeric lit-
eral> is the number of <digit>s to the right of the <period>.
6.12
1) If the data type of both operands of a dyadic arithmetic opera-
tor is exact numeric, then the data type of the result is exact
numeric, with precision and scale determined as follows:
a) Let S1 and S2 be the scale of the first and second operands
respectively.
b) The precision of the result of addition and subtraction is
implementation-defined, and the scale is the maximum of S1
and S2.
c) The precision of the result of multiplication is implementation-
defined, and the scale is S1 + S2.
d) The precision and scale of the result of division is
implementation-defined.
{noformat}
> Decimal should have lower precedence than double in type hierachy
> -----------------------------------------------------------------
>
> Key: HIVE-13380
> URL: https://issues.apache.org/jira/browse/HIVE-13380
> Project: Hive
> Issue Type: Bug
> Components: Types
> Reporter: Ashutosh Chauhan
> Assignee: Ashutosh Chauhan
> Labels: TODOC2.1
> Fix For: 2.1.0
>
> Attachments: HIVE-13380.2.patch, HIVE-13380.4.patch,
> HIVE-13380.5.patch, HIVE-13380.patch, decimal_filter.q
>
>
> Currently its other way round. Also, decimal should be lower than float.
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