Whether there were any records with null _airbyte_loaded_at, at the time that this status was fetched.
_airbyte_loaded_at
The highest timestamp such that all records in SELECT * FROM raw_table WHERE _airbyte_extracted_at <= ? have a nonnull _airbyte_loaded_at.
SELECT * FROM raw_table WHERE _airbyte_extracted_at <= ?
Many callers need to do a create table if not exists. This is a utility method to update the initial status accordingly - i.e. if the table already existed, retain its status; otherwise, use the empty table status.
create table if not exists