[BigQueryWorkloadTester] Cannot execute query with return code

[fr-okubo01]

Query with return code is not executed. Once replace return code with space, it worked.
If query with return code is acceptable, it will be very helpful.

followings are error messages
com.google.cloud.pontem.benchmark.backends.BackendException: com.google.cloud.bigquery.BigQueryException: Syntax error: Expected keyword AS but got end of statement at [1:24]
at com.google.cloud.pontem.benchmark.backends.BigQueryBackend.executeQuery(BigQueryBackend.java:67)
at com.google.cloud.pontem.benchmark.runners.SerialQueryRunner.executeQuery(SerialQueryRunner.java:64)
at com.google.cloud.pontem.benchmark.runners.SerialQueryRunner.run(SerialQueryRunner.java:54)
at com.google.cloud.pontem.benchmark.runners.callables.WorkloadRunnerCallable.call(WorkloadRunnerCallable.java:50)
at com.google.cloud.pontem.benchmark.runners.callables.WorkloadRunnerCallable.call(WorkloadRunnerCallable.java:29)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)