public final Index_optionContext index_option() throws RecognitionException {
		Index_optionContext _localctx = new Index_optionContext(_ctx, getState());
		enterRule(_localctx, 32, RULE_index_option);
		int _la;
		try {
			setState(285);
			switch (_input.LA(1)) {
			case KEY_BSIZE:
				enterOuterAlt(_localctx, 1);
				{
				setState(279); match(KEY_BSIZE);
				setState(281);
				_la = _input.LA(1);
				if (_la==EQ) {
					{
					setState(280); match(EQ);
					}
				}

				setState(283); value();
				}
				break;
			case USING:
				enterOuterAlt(_localctx, 2);
				{
				setState(284); index_type();
				}
				break;
			default:
				throw new NoViableAltException(this);
			}
		}
		catch (RecognitionException re) {
			_localctx.exception = re;
			_errHandler.reportError(this, re);
			_errHandler.recover(this, re);
		}
		finally {
			exitRule();
		}
		return _localctx;
	}