remove unused variable

warning: variable ‘aux’ set but not used
Merge pull request #5 from okbob/master

remove unused variable
don't need a special SQL script files for 9.1 and higher
add renamed 9.1 SQL script (now common for all 9.1 and higher)
Merge pull request #7 from okbob/master

don't need a special SQL script files for 9.1 and higher
Merge pull request #6 from b-emerson/master

Add Missing Regression Tests