[parser] mysql: NO_AUTO_CREATE_USER detect helper function (#10)
[parser] mysql: NO_AUTO_CREATE_USER detect helper function (#10)

* mysql: Add NO_AUTO_CREATE_USER detection
pingcap/tidb,coocood/tidb,ngaut/tidb,kyle-wang/tidb,kyle-wang/tidb,c4pt0r/tidb,c4pt0r/tidb,kyle-wang/tidb,ngaut/tidb,ngaut/tidb,ngaut/tidb,pingcap/tidb,pingcap/tidb,c4pt0r/tidb,coocood/tidb,pingcap/tidb,pingcap/tidb,kyle-wang/tidb,kyle-wang/tidb,ngaut/tidb,c4pt0r/tidb,c4pt0r/tidb,kyle-wang/tidb,ngaut/tidb,c4pt0r/tidb,pingcap/tidb