Union schema shows list of schema contributing to it, but the dataset name list are misleading. I have checked it also shows those list of dataset, which doesnt even have those fields. it could be a bug in the UI ? Or may be it assumes that just if the underlying shema has the field, then dataset might also have it ?
By the way I have tried these steps in past ,
- From union schema find the list of schema contributing to that field
- From dataset, find all those schema which are linked to it. using the filter on bottom left corner. This would be one schema filter at a time.
- Then query each of the dataset to see if they have a column for that attribute. Having a column indicates that dataset contributed toward the data ingestion for that field.