class ActiveRecord::ConnectionAdapters::SQLite3Adapter

def rename_table(table_name, new_name)

rename_table('octopuses', 'octopi')
Example:

Renames a table.
def rename_table(table_name, new_name)
  exec_query "ALTER TABLE #{quote_table_name(table_name)} RENAME TO #{quote_table_name(new_name)}"
  rename_table_indexes(table_name, new_name)
end