Method wait_for_query_start

tests/shell/util.py:290–304

If this shell was started with the '-q' option, this mathod will block until the query has started running

(self)

    return self

  def wait_for_query_start(self):
    """If this shell was started with the '-q' option, this mathod will block until the
    query has started running"""
    # readline() will block until a line is actually printed, so this loop should always
    # read something like:
    #   Starting Impala Shell without Kerberos authentication
    #   Connected to localhost:21000
    #   Server version: impalad version...
    #   Query: select sleep(10)
    #   Query submitted at:...
    #   Query state can be monitored at:...
    # We stop at 10 iterations to prevent an infinite loop if somehting goes wrong.
    iters = 0
    while "Query state" not in self.shell_process.stderr.readline() and iters < 10:
      iters += 1

  def get_result(self, stdin_input=None):
    """Returns an ImpalaShellResult produced by the shell process on exit. After this