I have registered SQL Server tables in the metadata.
In the registered metadata, I have changed some attributes like column formats and column descriptions. Attributes which cannot be stored in the SQL server table.
When I query the table using the query builder in EG 4.3 through a library assigned with metadata libname engine,
the formats / labels are not retained to the resulting table.
The library needs to be pre-assigned in order for table metadata to be used.
Eventually you could add option "defer=yes" to the metadata library definition so the connection to the database will only be established when you actually use one of the tables (at least I think this is how it works).