private String[] regex = {
        "^select \\* from (.*) where (.*) (.*) (.*)$",
        "^select (.*) from (.*) where (.*) (.*) (.*)$",
        "^select \\* from (.*)$",
        "^select (.*) from (.*)$"
    };
    private Pattern[] pattern = {
            Pattern.compile(regex[0], Pattern.CASE_INSENSITIVE | Pattern.UNICODE_CASE),
            Pattern.compile(regex[1], Pattern.CASE_INSENSITIVE | Pattern.UNICODE_CASE),
            Pattern.compile(regex[2], Pattern.CASE_INSENSITIVE | Pattern.UNICODE_CASE),
            Pattern.compile(regex[3], Pattern.CASE_INSENSITIVE | Pattern.UNICODE_CASE)
    };
    private Matcher matcher;