public final HiveParser.columnNameType_return columnNameType() throws RecognitionException {
		HiveParser.columnNameType_return retval = new HiveParser.columnNameType_return();
		retval.start = input.LT(1);

		CommonTree root_0 = null;

		Token comment=null;
		Token KW_COMMENT667=null;
		ParserRuleReturnScope colName =null;
		ParserRuleReturnScope colType666 =null;

		CommonTree comment_tree=null;
		CommonTree KW_COMMENT667_tree=null;
		RewriteRuleTokenStream stream_StringLiteral=new RewriteRuleTokenStream(adaptor,"token StringLiteral");
		RewriteRuleTokenStream stream_KW_COMMENT=new RewriteRuleTokenStream(adaptor,"token KW_COMMENT");
		RewriteRuleSubtreeStream stream_colType=new RewriteRuleSubtreeStream(adaptor,"rule colType");
		RewriteRuleSubtreeStream stream_identifier=new RewriteRuleSubtreeStream(adaptor,"rule identifier");

		 msgs.push("column specification"); 
		try {
			// HiveParser.g:1740:5: (colName= identifier colType ( KW_COMMENT comment= StringLiteral )? -> {$comment == null}? ^( TOK_TABCOL $colName colType ) -> ^( TOK_TABCOL $colName colType $comment) )
			// HiveParser.g:1740:7: colName= identifier colType ( KW_COMMENT comment= StringLiteral )?
			{
			pushFollow(FOLLOW_identifier_in_columnNameType10532);
			colName=identifier();
			state._fsp--;

			stream_identifier.add(colName.getTree());
			pushFollow(FOLLOW_colType_in_columnNameType10534);
			colType666=colType();
			state._fsp--;

			stream_colType.add(colType666.getTree());
			// HiveParser.g:1740:34: ( KW_COMMENT comment= StringLiteral )?
			int alt182=2;
			int LA182_0 = input.LA(1);
			if ( (LA182_0==KW_COMMENT) ) {
				alt182=1;
			}
			switch (alt182) {
				case 1 :
					// HiveParser.g:1740:35: KW_COMMENT comment= StringLiteral
					{
					KW_COMMENT667=(Token)match(input,KW_COMMENT,FOLLOW_KW_COMMENT_in_columnNameType10537);  
					stream_KW_COMMENT.add(KW_COMMENT667);

					comment=(Token)match(input,StringLiteral,FOLLOW_StringLiteral_in_columnNameType10541);  
					stream_StringLiteral.add(comment);

					}
					break;

			}

			// AST REWRITE
			// elements: colType, comment, colName, colName, colType
			// token labels: comment
			// rule labels: retval, colName
			// token list labels: 
			// rule list labels: 
			// wildcard labels: 
			retval.tree = root_0;
			RewriteRuleTokenStream stream_comment=new RewriteRuleTokenStream(adaptor,"token comment",comment);
			RewriteRuleSubtreeStream stream_retval=new RewriteRuleSubtreeStream(adaptor,"rule retval",retval!=null?retval.getTree():null);
			RewriteRuleSubtreeStream stream_colName=new RewriteRuleSubtreeStream(adaptor,"rule colName",colName!=null?colName.getTree():null);

			root_0 = (CommonTree)adaptor.nil();
			// 1741:5: -> {$comment == null}? ^( TOK_TABCOL $colName colType )
			if (comment == null) {
				// HiveParser.g:1741:28: ^( TOK_TABCOL $colName colType )
				{
				CommonTree root_1 = (CommonTree)adaptor.nil();
				root_1 = (CommonTree)adaptor.becomeRoot((CommonTree)adaptor.create(TOK_TABCOL, "TOK_TABCOL"), root_1);
				adaptor.addChild(root_1, stream_colName.nextTree());
				adaptor.addChild(root_1, stream_colType.nextTree());
				adaptor.addChild(root_0, root_1);
				}

			}

			else // 1742:5: -> ^( TOK_TABCOL $colName colType $comment)
			{
				// HiveParser.g:1742:28: ^( TOK_TABCOL $colName colType $comment)
				{
				CommonTree root_1 = (CommonTree)adaptor.nil();
				root_1 = (CommonTree)adaptor.becomeRoot((CommonTree)adaptor.create(TOK_TABCOL, "TOK_TABCOL"), root_1);
				adaptor.addChild(root_1, stream_colName.nextTree());
				adaptor.addChild(root_1, stream_colType.nextTree());
				adaptor.addChild(root_1, stream_comment.nextNode());
				adaptor.addChild(root_0, root_1);
				}

			}


			retval.tree = root_0;

			}

			retval.stop = input.LT(-1);

			retval.tree = (CommonTree)adaptor.rulePostProcessing(root_0);
			adaptor.setTokenBoundaries(retval.tree, retval.start, retval.stop);

			 msgs.pop(); 
		}

		catch (RecognitionException e) {
		 reportError(e);
		  throw e;
		}

		finally {
			// do for sure before leaving
		}
		return retval;
	}