Module /DB/Abstract.pm
TODO list:
  1. No information
Functionality list:
  1. new
  2. make_dsn
  3. execute
  4. get_databases
  5. get_tables
  6. get_views
  7. get_indexes
  8. get_sequences
  9. get_table_info
  10. get_view_info
  11. get_index_info
  12. get_sequence_info
  13. delete_table
  14. delete_view
  15. delete_index
  16. delete_sequence