Hi, Jie, If you don't need these metadata columns, you don't need to declare them for the table. Then metadata columns will not be read from sources and will not be written into the sink. You can query a table that is without the metadata column declaration. It depends on your requests.
Best, Hang Jie Han <tunyu...@gmail.com> 于2023年3月26日周日 21:42写道： > Thank you for your respond. > Actually I noticed that the doc says 'However, declaring a metadata column > in a table’s schema is optional’. > So, does it mean that we don’t need to declare it when we don't query it > rather than we can query it without the declaration? > > Best, > Jay > > > > > > >
