Merge pull request #405 from melin/master

mysql count from子语句需要添加alias
add testcase
bug fixed for wall provider
Merge remote-tracking branch 'upstream/master'
支持中文空格
sql parser支持中文空格和逗号
1 修复 OracleOutputVisitor.java 在输出hint时候 输出错误
2 hint必须放在select后面否则走不上索引
3 统一分隔，所有符号后面加一个空格
improve wall filter
improve parser & wall-filter
refactor
improve sql parser
Merge pull request #408 from owenludong/master

修复 OracleOutputVisitor.java 在输出hint时候 输出错误的问题
improve sql-wall
Merge remote-tracking branch 'upstream/master'
remote duplidate space
improve sql-wall
improve sql-wall
modify wall rule
improve sql
Merge pull request #411 from cutedemons/master

modify wall rule