Specifies the fully-qualified name of the table that was the target of the load.
Namespace is the database and/or schema in which the table resides, in the form of database_name.schema_name or schema_name. It is optional if a database and schema
are currently in use within the user session; otherwise, it is required.
If _last is specified instead of query_id, the function validates the last load executed during the current session, regardless of the specified target table.