Package org.apache.hadoop.hive.ql.optimizer.GenMRProcContext

Examples of org.apache.hadoop.hive.ql.optimizer.GenMRProcContext.GenMRUnionCtx

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    // is the current task a root task
    if (uPrsCtx.getRootTask(pos) && (!ctx.getRootTasks().contains(currTask))) {
      ctx.getRootTasks().add(currTask);
    }

    GenMRUnionCtx uCtxTask = ctx.getUnionTask(union);
    Task<? extends Serializable> uTask = null;

    Operator<? extends Serializable> parent = union.getParentOperators().get(
        pos);
    MapredWork uPlan = null;

    // union is encountered for the first time
    if (uCtxTask == null) {
      uCtxTask = new GenMRUnionCtx();
      uPlan = GenMapRedUtils.getMapRedWork(parseCtx.getConf());
      uTask = TaskFactory.get(uPlan, parseCtx.getConf());
      uCtxTask.setUTask(uTask);
      ctx.setUnionTask(union, uCtxTask);
    } else {
      uTask = uCtxTask.getUTask();
      uPlan = (MapredWork) uTask.getWork();
    }

    // If there is a mapjoin at position 'pos'
    if (uPrsCtx.getMapJoinSubq(pos)) {
      AbstractMapJoinOperator<? extends MapJoinDesc> mjOp = ctx.getCurrMapJoinOp();
      assert mjOp != null;
      GenMRMapJoinCtx mjCtx = ctx.getMapJoinCtx(mjOp);
      assert mjCtx != null;
      MapredWork plan = (MapredWork) currTask.getWork();

      String taskTmpDir = mjCtx.getTaskTmpDir();
      TableDesc tt_desc = mjCtx.getTTDesc();
      assert plan.getPathToAliases().get(taskTmpDir) == null;
      plan.getPathToAliases().put(taskTmpDir, new ArrayList<String>());
      plan.getPathToAliases().get(taskTmpDir).add(taskTmpDir);
      plan.getPathToPartitionInfo().put(taskTmpDir,
          new PartitionDesc(tt_desc, null));
      plan.getAliasToWork().put(taskTmpDir, mjCtx.getRootMapJoinOp());
    }

    TableDesc tt_desc = PlanUtils.getIntermediateFileTableDesc(PlanUtils
        .getFieldSchemasFromRowSchema(parent.getSchema(), "temporarycol"));

    // generate the temporary file
    Context baseCtx = parseCtx.getContext();
    String taskTmpDir = baseCtx.getMRTmpFileURI();

    // Add the path to alias mapping
    uCtxTask.addTaskTmpDir(taskTmpDir);
    uCtxTask.addTTDesc(tt_desc);

    // The union task is empty. The files created for all the inputs are
    // assembled in the
    // union context and later used to initialize the union plan
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      Task<? extends Serializable> currTask, boolean local)
      throws SemanticException {
    // In case of lateral views followed by a join, the same tree
    // can be traversed more than one
    if (currUnionOp != null) {
      GenMRUnionCtx uCtx = opProcCtx.getUnionTask(currUnionOp);
      assert uCtx != null;
      setUnionPlan(opProcCtx, local, currTask, uCtx, false);
    }
  }
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      UnionOperator currUnionOp,
      Task<? extends Serializable> currentUnionTask,
      Task<? extends Serializable> existingTask, boolean local)
      throws SemanticException {
    assert currUnionOp != null;
    GenMRUnionCtx uCtx = opProcCtx.getUnionTask(currUnionOp);
    assert uCtx != null;

    setUnionPlan(opProcCtx, local, existingTask, uCtx, true);

    List<Task<? extends Serializable>> parTasks = null;
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      Task<? extends Serializable> currTask, boolean local)
      throws SemanticException {
    // In case of lateral views followed by a join, the same tree
    // can be traversed more than one
    if (currUnionOp != null) {
      GenMRUnionCtx uCtx = opProcCtx.getUnionTask(currUnionOp);
      assert uCtx != null;
      setUnionPlan(opProcCtx, local, currTask, uCtx, false);
    }
  }
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      UnionOperator currUnionOp,
      Task<? extends Serializable> currentUnionTask,
      Task<? extends Serializable> existingTask, boolean local)
      throws SemanticException {
    assert currUnionOp != null;
    GenMRUnionCtx uCtx = opProcCtx.getUnionTask(currUnionOp);
    assert uCtx != null;

    setUnionPlan(opProcCtx, local, existingTask, uCtx, true);

    List<Task<? extends Serializable>> parTasks = null;
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      Task<? extends Serializable> currTask, boolean local)
      throws SemanticException {
    // In case of lateral views followed by a join, the same tree
    // can be traversed more than one
    if (currUnionOp != null) {
      GenMRUnionCtx uCtx = opProcCtx.getUnionTask(currUnionOp);
      assert uCtx != null;
      setUnionPlan(opProcCtx, local, currTask, uCtx, false);
    }
  }
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      UnionOperator currUnionOp,
      Task<? extends Serializable> currentUnionTask,
      Task<? extends Serializable> existingTask, boolean local)
      throws SemanticException {
    assert currUnionOp != null;
    GenMRUnionCtx uCtx = opProcCtx.getUnionTask(currUnionOp);
    assert uCtx != null;

    setUnionPlan(opProcCtx, local, existingTask, uCtx, true);

    List<Task<? extends Serializable>> parTasks = null;
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   */
  private Object processMapOnlyUnion(UnionOperator union, Stack<Node> stack,
      GenMRProcContext ctx, UnionProcContext uCtx) throws SemanticException {

    // merge currTask from multiple topOps
    GenMRUnionCtx uCtxTask = ctx.getUnionTask(union);
    if (uCtxTask != null) {
      // get task associated with this union
      Task<? extends Serializable> uTask = ctx.getUnionTask(union).getUTask();
      if (uTask != null) {
        if (ctx.getCurrTask() != null && ctx.getCurrTask() != uTask) {
          // if ctx.getCurrTask() is in rootTasks, should be removed
          ctx.getRootTasks().remove(ctx.getCurrTask());
        }
        ctx.setCurrTask(uTask);
      }
    }

    UnionParseContext uPrsCtx = uCtx.getUnionParseContext(union);
    ctx.getMapCurrCtx().put(
        (Operator<? extends OperatorDesc>) union,
        new GenMapRedCtx(ctx.getCurrTask(),
            ctx.getCurrAliasId()));

    // if the union is the first time seen, set current task to GenMRUnionCtx
    uCtxTask = ctx.getUnionTask(union);
    if (uCtxTask == null) {
      uCtxTask = new GenMRUnionCtx(ctx.getCurrTask());
      ctx.setUnionTask(union, uCtxTask);
    }

    Task<? extends Serializable> uTask = ctx.getCurrTask();
    if (uTask.getParentTasks() == null
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    Task<? extends Serializable> uTask = null;
    MapredWork uPlan = null;

    // union is encountered for the first time
    GenMRUnionCtx uCtxTask = ctx.getUnionTask(union);
    if (uCtxTask == null) {
      uPlan = GenMapRedUtils.getMapRedWork(parseCtx);
      uTask = TaskFactory.get(uPlan, parseCtx.getConf());
      uCtxTask = new GenMRUnionCtx(uTask);
      ctx.setUnionTask(union, uCtxTask);
    }
    else {
      uTask = uCtxTask.getUTask();
    }

    // Copy into the current union task plan if
    if (uPrsCtx.getMapOnlySubq(pos) && uPrsCtx.getRootTask(pos)) {
      processSubQueryUnionMerge(ctx, uCtxTask, union, stack);
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   */
  private Object processMapOnlyUnion(UnionOperator union, Stack<Node> stack,
      GenMRProcContext ctx, UnionProcContext uCtx) throws SemanticException {

    // merge currTask from multiple topOps
    GenMRUnionCtx uCtxTask = ctx.getUnionTask(union);
    if (uCtxTask != null) {
      // get task associated with this union
      Task<? extends Serializable> uTask = ctx.getUnionTask(union).getUTask();
      if (uTask != null) {
        if (ctx.getCurrTask() != null && ctx.getCurrTask() != uTask) {
          // if ctx.getCurrTask() is in rootTasks, should be removed
          ctx.getRootTasks().remove(ctx.getCurrTask());
        }
        ctx.setCurrTask(uTask);
      }
    }

    UnionParseContext uPrsCtx = uCtx.getUnionParseContext(union);
    ctx.getMapCurrCtx().put(
        (Operator<? extends OperatorDesc>) union,
        new GenMapRedCtx(ctx.getCurrTask(), ctx.getCurrTopOp(),
            ctx.getCurrAliasId()));

    // if the union is the first time seen, set current task to GenMRUnionCtx
    uCtxTask = ctx.getUnionTask(union);
    if (uCtxTask == null) {
      uCtxTask = new GenMRUnionCtx();
      uCtxTask.setUTask(ctx.getCurrTask());
      ctx.setUnionTask(union, uCtxTask);
    }

    Task<? extends Serializable> uTask = ctx.getCurrTask();
    if (uTask.getParentTasks() == null
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Related Classes of org.apache.hadoop.hive.ql.optimizer.GenMRProcContext.GenMRUnionCtx

  • org.apache.hadoop.hive.ql.optimizer.GenMapRedUtils
  • org.apache.hadoop.hive.ql.optimizer.GenMRUnion1
  • org.apache.hadoop.hive.ql.optimizer.MapJoinFactory$UnionMapJoin
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