public final Index_typeContext index_type() throws RecognitionException {
		Index_typeContext _localctx = new Index_typeContext(_ctx, getState());
		enterRule(_localctx, 30, RULE_index_type);
		int _la;
		try {
			enterOuterAlt(_localctx, 1);
			{
			setState(275); match(USING);
			setState(277);
			switch ( getInterpreter().adaptivePredict(_input,26,_ctx) ) {
			case 1:
				{
				setState(276);
				_la = _input.LA(1);
				if ( !(_la==BTREE || _la==HASH) ) {
				_errHandler.recoverInline(this);
				}
				consume();
				}
				break;
			}
			}
		}
		catch (RecognitionException re) {
			_localctx.exception = re;
			_errHandler.reportError(this, re);
			_errHandler.recover(this, re);
		}
		finally {
			exitRule();
		}
		return _localctx;
	}