[
https://issues.apache.org/jira/browse/CALCITE-6464?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17865708#comment-17865708
]
Mihai Budiu commented on CALCITE-6464:
--------------------------------------
Great, any contributions are appreciated. Hopefully this should be an easy one,
confined to a single function. You may have trouble if some tests start failing
after this change, because they depended on this bug.
> Type inference for DECIMAL division seems incorrect
> ---------------------------------------------------
>
> Key: CALCITE-6464
> URL: https://issues.apache.org/jira/browse/CALCITE-6464
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.37.0
> Reporter: Mihai Budiu
> Assignee: Tim Grein
> Priority: Minor
>
> This bug surfaces if one uses a custom type system, e.g., where DECIMAL is
> limited to (28, 10).
> The problem is in RelDataTypeSystem.deriveDecimalDivideType.
> The JavaDoc of this function gives the algorithm for deriving the division
> result type.
> According to these rules, if you divide two numbers of type DECIMAL(28, 10),
> you should get a result with type DECIMAL(28, 10).
> But the actual implementation infers a type of DECIMAL(28, 0), which seems
> incorrect.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
