使用Select * from table into outfile 导出到本地的csv文件没有表头，只有数据行。需要把列名也导出到csv文件中怎么设置呢？

SELECT k1 FROM tbl1 UNION SELECT k2 FROM tbl1
INTO OUTFILE "file:///path/to/result_"
FORMAT AS CSV
PROPERTIES(
"column_separator" = ","
);
是需要在PROPERTIES中补充一个什么参数吗？官方文档中没有提及呢？