set hive.script.operator.id.env.var = MY_ID;
-- Same test as script_env_var1, but test setting the variable name
SELECT count(1) FROM
( SELECT TRANSFORM('echo $MY_ID') USING 'bash' AS key FROM src LIMIT 1 UNION ALL
  SELECT TRANSFORM('echo $MY_ID') USING 'bash' AS key FROM src LIMIT 1 ) a GROUP BY key;