apache/incubator-phoenix — pull request #26 by tzolkincz (2014-04-02 16:52:05+00:00)
Title: add function timezone offset

Function for get offset (shift) of timezone at particular datetime. Example use case: let's say you have stored some data in some offset and want to query like this:
```SQL
SELECT * FROM table
WHERE offset = TIMEZONE_OFFSET('Indian/Cocos', TO_DATE('2014-02-01 00:00:00'))
```
Thanks