The Debezium Postgres connector now just supports the notion of blacklisting column names. For some usecases it's beneficial to introduce a whitelist for columns. Therefore this the proposal is to introduce the `column.whitelist` for the Postgres connector. It's similar to the whitelist already in use for tables, which also inverses the behaviour of the blacklist for tables.

Checked before implementation with gmorling@redhat.com if this would be a useful addition to Debezium.