Hi, Jie, In Flink, if we want to access a metadata column, we need to declare it in the DDL. More details could be found here[1].
Best, Hang [1] https://nightlies.apache.org/flink/flink-docs-release-1.17/docs/dev/table/sql/create/#columns Jie Han <tunyu...@gmail.com> 于2023年3月26日周日 14:58写道： > Hi community, I want to query a metadata column from my table t. Do I > need to declare it in the table schema explicitly? > > In spark, metadata columns are *hidden* columns, which means we don’t > need to declare it in the table ddl, we only explicitly reference it in our > query. For instance, select *, _metadata from t. > > >
