Registration inferencing

Overview

• FeatureView - When the features parameter is left out of the feature view definition, upon a feast apply call, Feast will automatically consider every column in the data source as a feature to be registered other than the specific timestamp columns associated with the underlying data source definition (e.g. timestamp_field) and the columns associated with the feature view's entities.
• DataSource - When the timestamp_field parameter is left out of the data source definition, upon a 'feast apply' call, Feast will automatically find the sole timestamp column in the table underlying the data source and use that as the timestamp_field. If there are no columns of timestamp type or multiple columns of timestamp type, feast apply will throw an exception.
• Entity - When the value_type parameter is left out of the entity definition, upon a feast apply call, Feast will automatically find the column corresponding with the entity's join_key and take that column's data type to be the value_type. If the column doesn't exist, feast apply will throw an exception.