Database system table problem
Yes, that is the system table, which stores details about available modules, themes and theme engines.

For more information about the system table schema, refer to the technical documentation at:

system_schema

from:

 $schema['system'] = array(
    'description' =&gt; "A list of all modules, themes, and theme engines that are or have been installed in Drupal's file system.",


and also, it's usage by: 

system_list


  Builds a list of bootstrap modules and enabled modules and themes.