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DataSourceHandle :: LoadOptions - Load options when database not yet opened

In some cases, options are required before logging in into the database. On the other hand, options cannot be read before logging in. This function opens the database shortly without login request, just for reading the options and closing the database afterward.

When the database could not be opened, or when an error occurred while reading options, the function throws an exception.

Return value:  Success ( logical  )

Implementation details

logical DataSourceHandle  :: LoadOptions (  )