* hack

* make a column

* add

* no scale=0 on BD type

* a test

* wip

* 3 arithmetic ops

* /

* wip

* BigDecimalPowerOp

* wip

* mod test

* NumericBinaryOpReturningBigDecimal

* with scalar

* misc arithmetic tests

* fix integralBigDecimalToInteger

* mixed columns

* bigdecimal pow via double

* cleanup

* j2e on get

* arithmetic exception

* mod 0

* cleanup

* fmt

* changelog

* check type first

* merge

* mc error message

* add BD case to Builder.java

* fmt

* changelog

* add BD case to StorageConverter.java

* fmt

* fix test