Made unit tests for handling wEIRD casing of oracle table and column
name identifiers
Added a test using the wrong casing when accessing a column in mysql.
(Table names have to have correct casing)
Added test for correct treatment of lower/upppercase postgres table and
column names
Removed old SQLParser
Added and fixed comments
Merge branch 'feature/identifierCasingTests' into feature/jsqlParser
adding casing tests.
Bug fixing and comments added
update aliases to change value in lowercase
Return columns of the query in VisitedQuery
Merge branch 'feature/jsqlParser' into feature/leftjoin
fix an issue in ColumnsVisitor for Unions
working on the columns
first version can generate SQL of correct structure