fix ProjectedColumnExpression.toString()
change column alias
change column alias
Fix column alias
Fix column alias
revert changes
Revert
move column-alias fixup to statement normalize
bug fix
fix AmbiguousColumnException thrown by ParseNodeRewriter
Fix case-sensitive bugs in join and delete compiler; add test cases
Merge pull request #711 from maryannxue/master

Fix issue #709 and #710