org.apache.hadoop.hive.ql.hooks.PostExecOrcRowGroupCountPrinter Maven / Gradle / Ivy
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package org.apache.hadoop.hive.ql.hooks;
import java.util.List;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.llap.counters.LlapIOCounters;
import org.apache.hadoop.hive.ql.QueryPlan;
import org.apache.hadoop.hive.ql.exec.Utilities;
import org.apache.hadoop.hive.ql.exec.tez.TezTask;
import org.apache.hadoop.hive.ql.session.SessionState;
import org.apache.tez.common.counters.CounterGroup;
import org.apache.tez.common.counters.TezCounter;
import org.apache.tez.common.counters.TezCounters;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Post execution hook to print number of ORC row groups read from the counter. Used for Predicate Pushdown testing.
*/
public class PostExecOrcRowGroupCountPrinter implements ExecuteWithHookContext {
private static final Logger LOG = LoggerFactory.getLogger(PostExecOrcRowGroupCountPrinter.class.getName());
@Override
public void run(HookContext hookContext) throws Exception {
assert (hookContext.getHookType() == HookContext.HookType.POST_EXEC_HOOK);
HiveConf conf = hookContext.getConf();
if (!"tez".equals(HiveConf.getVar(conf, HiveConf.ConfVars.HIVE_EXECUTION_ENGINE))) {
return;
}
LOG.info("Executing post execution hook to print ORC row groups read counter..");
SessionState ss = SessionState.get();
SessionState.LogHelper console = ss.getConsole();
QueryPlan plan = hookContext.getQueryPlan();
if (plan == null) {
return;
}
List rootTasks = Utilities.getTezTasks(plan.getRootTasks());
for (TezTask tezTask : rootTasks) {
LOG.info("Printing ORC row group counter for tez task: " + tezTask.getName());
TezCounters counters = tezTask.getTezCounters();
if (counters != null) {
for (CounterGroup group : counters) {
if (group.getName().equals(LlapIOCounters.class.getName())) {
console.printInfo(tezTask.getId() + " LLAP IO COUNTERS:", false);
for (TezCounter counter : group) {
if (counter.getDisplayName().equals(LlapIOCounters.SELECTED_ROWGROUPS.name())) {
console.printInfo(" " + counter.getDisplayName() + ": " + counter.getValue(), false);
}
}
}
}
}
}
}
}