MinJi Kim edited comment on CALCITE-1453 at 10/18/16 3:08 AM:

[~julianhyde] and [~kabhwan]  I will take a look at the patch.  

was (Author: minjikim):
[~julianhyde] I will take a look at the patch.

> Support ANY type with binary compare / arithmetic operators
> -----------------------------------------------------------
>                 Key: CALCITE-1453
>                 URL: https://issues.apache.org/jira/browse/CALCITE-1453
>             Project: Calcite
>          Issue Type: Improvement
>          Components: core
>            Reporter: Jungtaek Lim
>            Assignee: Jungtaek Lim
> Currently Calcite doesn't support applying binary compare / arithmetic 
> operators with ANY type. One of example is 
> CollectionTypeTest.testAccessNestedMapWithAnyTypeWithoutCast(). Without 
> explicit casting, it can't find the matching backup method, and complaining 
> there's no SqlFunctions.eq(Object, int).
> There seems to several ways to resolve this, but at least we don't want to 
> make operator backup method for every combination of types. Needs to avoid 
> this approach.
> When we're addressing this by having backup method, since we don't know the 
> runtime type for ANY type, even if we succeed to call backup method with 
> (Object, Object) parameters, two types can be different. This is OK for other 
> types, but not Number types. This should be well cared, too.

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