AST tmp1599_AST_in = (AST)_t;
AST tmp1598_AST_in = (AST)_t;
	public final void altertablestate(AST _t) throws RecognitionException {				AST altertablestate_AST_in = (_t == ASTNULL) ? null : (AST)_t;				AST __t1247 = _t;		AST tmp1592_AST_in = (AST)_t;		match(_t,ALTER);		_t = _t.getFirstChild();		AST tmp1593_AST_in = (AST)_t;		match(_t,TABLE);		_t = _t.getNextSibling();		tbl(_t,CQ.SCHEMATABLESYMBOL);		_t = _retTree;		{		if (_t==null) _t=ASTNULL;		switch ( _t.getType()) {		case ADD:		{			AST tmp1594_AST_in = (AST)_t;			match(_t,ADD);			_t = _t.getNextSibling();			AST tmp1595_AST_in = (AST)_t;			match(_t,COLUMN);			_t = _t.getNextSibling();			sql_col_def(_t);			_t = _retTree;			break;		}		case DROP:		{			AST tmp1596_AST_in = (AST)_t;			match(_t,DROP);			_t = _t.getNextSibling();			AST tmp1597_AST_in = (AST)_t;			match(_t,COLUMN);			_t = _t.getNextSibling();			fld(_t,CQ.SYMBOL);			_t = _retTree;			break;		}		case ALTER:		{			AST tmp1598_AST_in = (AST)_t;			match(_t,ALTER);			_t = _t.getNextSibling();			AST tmp1599_AST_in = (AST)_t;			match(_t,COLUMN);			_t = _t.getNextSibling();			fld(_t,CQ.SYMBOL);			_t = _retTree;			{			_loop1252:			do {				if (_t==null) _t=ASTNULL;				switch ( _t.getType()) {				case FORMAT:				{					AST __t1250 = _t;					AST tmp1600_AST_in = (AST)_t;					match(_t,FORMAT);					_t = _t.getFirstChild();					expression(_t);					_t = _retTree;					_t = __t1250;					_t = _t.getNextSibling();					break;				}				case COLUMNLABEL:				case LABEL:				{					label_constant(_t);					_t = _retTree;					break;				}				case DEFAULT:				{					AST __t1251 = _t;					AST tmp1601_AST_in = (AST)_t;					match(_t,DEFAULT);					_t = _t.getFirstChild();					expression(_t);					_t = _retTree;					_t = __t1251;					_t = _t.getNextSibling();					break;				}				case CASESENSITIVE:				case Not_casesens:				{					casesens_or_not(_t);					_t = _retTree;					break;				}				default:				{					break _loop1252;				}				}			} while (true);			}			break;		}		default:		{			throw new NoViableAltException(_t);		}		}		}		state_end(_t);		_t = _retTree;		_t = __t1247;		_t = _t.getNextSibling();		_retTree = _t;	}