class DBI::DBD::OCI8::Statement

def column_info
  # minimum implementation.
  @cursor.column_metadata.collect do |md|
    col = column_metadata_to_column_info(md)
    col['indexed']   = nil
    col['primary']   = nil
    col['unique']    = nil
    col['default']   = nil
    col
  end
rescue OCIException => err
  raise_dbierror(err)
end