ExpressionEvaluators numeric types conversion support

Example:

table tbl (a: bigint)

 
data skipping work only if both types are the same. If we use

select * from tbl where a > 10

data skipping will not work, we have to use explicit cast:

select * from tbl where a > cast(10 as bigint)

 
Problem may be solved converting all numeric types to BigDecimal (without information lose):

by 20 lines of source code, without necessity of adding new rule or filter in flink engine (which can support more complex types conversion, such as string -> integer, but i think there is no need in such conversions)