quay/util/migrate/table_ops.py

def copy_table_contents(source_table, destination_table, conn):
  if conn.engine.name == 'postgresql':
    conn.execute('INSERT INTO "%s" SELECT * FROM "%s"' % (destination_table, source_table))
    result = list(conn.execute('Select Max(id) from "%s"' % destination_table))[0]
    if result[0] is not None:
      new_start_id = result[0] + 1
      conn.execute('ALTER SEQUENCE "%s_id_seq" RESTART WITH %s' % (destination_table, new_start_id))
  else:
    conn.execute("INSERT INTO `%s` SELECT * FROM `%s` WHERE 1" % (destination_table, source_table))
    result = list(conn.execute('Select Max(id) from `%s` WHERE 1' % destination_table))[0]
    if result[0] is not None:
      new_start_id = result[0] + 1
      conn.execute("ALTER TABLE `%s` AUTO_INCREMENT = %s" % (destination_table, new_start_id))