Merge update
merge
Merge remote-tracking branch 'upstream/master'
Fixed USED keyword in joins. Banned FULL and OUTER joins with more than 2 tables
USING fix
Compilation error fix
USING in progress
undo some changes
USING fix
code review comments
Fixed USING and separated WHERE and JOIN expressions. StandaloneTuple
Added unit test and eliminated 'dead' code
missed the file
Code review comments
reverted tmp changes
StandAloneTupleStorage code review comments
Two table outer join
Prevent subqueries
SelectSubPlanAssembler to plan outer joins with more than 2 tables
SQL coverage plus bug fix