Hi all,
I'd like to debug hive program, and want to use the raw java api of
Hive. I know that there's thrift api for hive, but it's not convenient
for me especially for debugging and unit test.
And I notice that the unit test (TestExecDriver) in hive use shim
(call ExecDriver in another process) which is also not convenient for
testing, I did some hacking and finally the following code can execute
successfully ( I create the table before the execution). so I'd like
to suggest maybe Hive should provide a more simple java api for
user(wrapper based on the Hive internal Java api) and allow user to
choose not using shim but directly using ExecDriver.
///////////////////////// code snippet
////////////////////////////////////////////////////////////////////////
HiveConf conf = new HiveConf(ExecDriver.class);
Driver driver = new Driver(conf);
driver.compile("select name from test group by name");
QueryPlan plan = Utilities.deserializeQueryPlan(new
FileInputStream(driver.ctx
.getLocalScratchDir().substring(5)
+ File.separator + "queryplan.xml"), conf);
Task task=plan.getRootTasks().get(0);
ExecDriver eDriver = new ExecDriver((MapredWork)task.getWork(),
new JobConf(), false);
eDriver.execute(new DriverContext());
--
Best Regards
Jeff Zhang
