protected EnvironmentVariableSpecs initializeEnvironmentVariableSpecs() {
      HashMap<String, EnvironmentVariableSpecs.Spec> specMap = new HashMap<>();
      specMap.put("samza.sql.output",
              new EnvironmentVariableSpecs.Spec(new String[]{"pretty", "compact"}, "compact"));
      return new EnvironmentVariableSpecs(specMap);
    }
Samza implementation of Executor for Samza SQL Shell.
samza-sql-shell/src/main/java/org/apache/samza/sql/client/impl/SamzaExecutor.java