// This will check if a QUERY_EVENT holds an "ALTER TABLE ..." string.
static bool checkAlterQuery(const std::string& str)
{
    //RegularExpression regexp("^\\s*ALTER\\s+TABLE)", RegularExpression::RE_CASELESS);

    enum {
        SP0, _A0, _L0, _T0, _E0, _R, SP1, _T1, _A1, _B, _L1, _E1
    } state = SP0;


    for (std::string::const_iterator i = str.begin(); i != str.end(); ++i) {

        if (state == SP0 && (*i == ' ' || *i == '\t' || *i == '\r' || *i == '\n')) {

        } else if (state == SP0 && (*i == 'a' || *i == 'A')) {
            state = _A0;

        } else if (state == _A0 && (*i == 'l' || *i == 'L')) {
            state = _L0;

        } else if (state == _L0 && (*i == 't' || *i == 'T')) {
            state = _T0;

        } else if (state == _T0 && (*i == 'e' || *i == 'E')) {
            state = _E0;

        } else if (state == _E0 && (*i == 'r' || *i == 'R')) {
            state = _R;

        } else if (state == _R && (*i == ' ' || *i == '\t' || *i == '\r' || *i == '\n')) {
            state = SP1;

        } else if (state == SP1 && (*i == ' ' || *i == '\t' || *i == '\r' || *i == '\n')) {

        } else if (state == SP1 && (*i == 't' || *i == 'T')) {
            state = _T1;

        } else if (state == _T1 && (*i == 'a' || *i == 'A')) {
            state = _A1;

        } else if (state == _A1 && (*i == 'b' || *i == 'B')) {
            state = _B;

        } else if (state == _B && (*i == 'l' || *i == 'L')) {
            state = _L1;

        } else if (state == _L1 && (*i == 'e' || *i == 'E')) {
            state = _E1;

        } else if (state == _E1) {
            return true;

        } else {
            return false;
        }
    }

    return false;
}