modify hsql to parse some extract timestamp field function, and add test case to these functions
change 'notest' back to 'test'
clean some code for debugging
add mapping relation in FunctoinCustom instead of Tokens and modifying test cases according to Xin's review
change back one line
map T_WEEK to WEEK instead of WEEK_OF_YEAR
change the TODO to the information provided by Paul
add week_of_year in extract function test
change notestFunc back to testFunc
refine code, and add support for WEEKOFYEAR and WEEKDAY. But WEEKDAY is an alias of DAYOFWEEK, and we should add a new function for it according to compliant requirment
add extrac_weekday function in ee, and map WEEKDAY SQL function to it
clean the code automatically modified by eclipse
1.clean code according Paul's review  2. I got wrong understanding of function weekday, and now fix it 3. add test cases for extract()
Merge pull request #1513 from VoltDB/ENG-6554-extract-time-func

modify hsql to parse some extract timestamp field function, and add test...