public final Drop_statementContext drop_statement() throws RecognitionException {
		Drop_statementContext _localctx = new Drop_statementContext(_ctx, getState());
		enterRule(_localctx, 14, RULE_drop_statement);
		int _la;
		try {
			setState(175);
			switch ( getInterpreter().adaptivePredict(_input,9,_ctx) ) {
			case 1:
				enterOuterAlt(_localctx, 1);
				{
				setState(157); match(DROP);
				setState(158);
				_la = _input.LA(1);
				if ( !(_la==DATABASE || _la==TABLE) ) {
				_errHandler.recoverInline(this);
				}
				consume();
				setState(159); match(IF);
				setState(160); match(EXISTS);
				setState(161); nameList();
				setState(163);
				_la = _input.LA(1);
				if (_la==PURGE) {
					{
					setState(162); match(PURGE);
					}
				}

				}
				break;

			case 2:
				enterOuterAlt(_localctx, 2);
				{
				setState(165); match(DROP);
				setState(166);
				_la = _input.LA(1);
				if ( !(_la==DATABASE || _la==TABLE) ) {
				_errHandler.recoverInline(this);
				}
				consume();
				setState(167); nameList();
				setState(169);
				_la = _input.LA(1);
				if (_la==PURGE) {
					{
					setState(168); match(PURGE);
					}
				}

				setState(173);
				_la = _input.LA(1);
				if (_la==IF) {
					{
					setState(171); match(IF);
					setState(172); match(EXISTS);
					}
				}

				}
				break;
			}
		}
		catch (RecognitionException re) {
			_localctx.exception = re;
			_errHandler.reportError(this, re);
			_errHandler.recover(this, re);
		}
		finally {
			exitRule();
		}
		return _localctx;
	}