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https://issues.apache.org/jira/browse/CALCITE-2282?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16825709#comment-16825709
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Danny Chan commented on CALCITE-2282:
-------------------------------------

[~hhlai1990] Seems you really have much requests about implicit type coercion, 
the behavior 2/5 = 0 is different for kinds of sql engines, like Oracle and 
MYSQL will produce 0.4 but POSTGRES will output 0.

While for Spark and Hive there is another sql operator DIVIDE_INTEGER (also in 
Calcite) will output 0 and DIVIDE will output all double/decimals for default.

 

> Allow OperatorTable to be pluggable in the parser
> -------------------------------------------------
>
>                 Key: CALCITE-2282
>                 URL: https://issues.apache.org/jira/browse/CALCITE-2282
>             Project: Calcite
>          Issue Type: Bug
>          Components: core
>            Reporter: Sudheesh Katkam
>            Priority: Major
>         Attachments: CALCITE-2282.patch.txt
>
>
> SqlAbstractParserImpl [hardcodes OperatorTable to 
> SqlStdOperatorTable|https://github.com/apache/calcite/blob/8327e674e7f0a768d124fa37fd75cda4b8a35bb6/core/src/main/java/org/apache/calcite/sql/parser/SqlAbstractParserImpl.java#L334|https://github.com/apache/calcite/blob/8327e674e7f0a768d124fa37fd75cda4b8a35bb6/core/src/main/java/org/apache/calcite/sql/parser/SqlAbstractParserImpl.java#L334].
>  Make this pluggable via a protected method.



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