commit 80240720ec7de7b68dec8741d2322d9cd7f989ed
author Jungtaek Lim <kabhwan@gmail.com> Tue Oct 18 11:10:16 2016 +0900
committer Julian Hyde <jhyde@apache.org> Wed Oct 26 16:56:22 2016 -0700
tree 018576e8aeec088d3cf902ffa29c029b9d868c4e
parent 08eb16bb5e0ef70695e305967eeac1dd79624420

[CALCITE-1453] Support ANY type with binary comparison and arithmetic operators (Jungtaek Lim)

ANY type is represented as Object. There's not enough overloaded
backup methods for comparison and arithmetic operators so if one or
both parameters have ANY type, Calcite cannot find the matched method.

This patch adds overloaded methods for comparison and arithmetic
operators whose parameters are (Object, Object). And if either
parameter is ANY, it boxes primitive type parameter so that it can be
matched to Object, Object.

Newly added overloaded methods are smart that they can handle
different Number types for parameters. However, the implementation has
some downsides:
1. requires converting to BigDecimal
2. the result of arithmetic is also BigDecimal

Close apache/calcite#311