org.apache.spark.sql.execution.aggregate
HashAggregateExec
Related Docs:
object HashAggregateExec
| package aggregate
org.apache.spark.sql.execution.aggregate
Consume the generated columns or row from current SparkPlan, call its parent's doConsume().
Consume the generated columns or row from current SparkPlan, call its parent's doConsume().
This is called by generated Java class, should be public.
This is called by generated Java class, should be public.
Generate the Java source code to process the rows from child SparkPlan.
Generate the Java source code to process the rows from child SparkPlan.
This should be override by subclass to support codegen.
For example, Filter will generate the code like this:
# code to evaluate the predicate expression, result is isNull1 and value2 if (isNull1 || !value2) continue; # call consume(), which will call parent.doConsume()
Note: A plan can either consume the rows as UnsafeRow (row), or a list of variables (input).
Overridden by concrete implementations of SparkPlan.
Overridden by concrete implementations of SparkPlan. Produces the result of the query as an RDD[InternalRow]
Overridden by concrete implementations of SparkPlan.
Overridden by concrete implementations of SparkPlan. Produces the result of the query as a broadcast variable.
Overridden by concrete implementations of SparkPlan.
Overridden by concrete implementations of SparkPlan. It is guaranteed to run before any
execute of SparkPlan. This is helpful if we want to set up some state before executing the
query, e.g., BroadcastHashJoin uses it to broadcast asynchronously.
Note: the prepare method has already walked down the tree, so the implementation doesn't need to call children's prepare methods.
This will only be called once, protected by this.
Generate the Java source code to process, should be overridden by subclass to support codegen.
Generate the Java source code to process, should be overridden by subclass to support codegen.
doProduce() usually generate the framework, for example, aggregation could generate this:
if (!initialized) { # create a hash map, then build the aggregation hash map # call child.produce() initialized = true; } while (hashmap.hasNext()) { row = hashmap.next(); # build the aggregation results # create variables for results # call consume(), which will call parent.doConsume() if (shouldStop()) return; }
Returns source code to evaluate the variables for required attributes, and clear the code of evaluated variables, to prevent them to be evaluated twice.
Returns source code to evaluate the variables for required attributes, and clear the code of evaluated variables, to prevent them to be evaluated twice.
Returns source code to evaluate all the variables, and clear the code of them, to prevent them to be evaluated twice.
Returns source code to evaluate all the variables, and clear the code of them, to prevent them to be evaluated twice.
Returns the result of this query as an RDD[InternalRow] by delegating to doExecute after
preparations.
Returns the result of this query as an RDD[InternalRow] by delegating to doExecute after
preparations.
Concrete implementations of SparkPlan should override doExecute.
Returns the result of this query as a broadcast variable by delegating to doExecuteBroadcast
after preparations.
Returns the result of this query as a broadcast variable by delegating to doExecuteBroadcast
after preparations.
Concrete implementations of SparkPlan should override doExecuteBroadcast.
Runs this query returning the result as an array.
Runs this query returning the result as an array.
Runs this query returning the result as an array, using external Row format.
Runs this query returning the result as an array, using external Row format.
Execute a query after preparing the query and adding query plan information to created RDDs for visualization.
Execute a query after preparing the query and adding query plan information to created RDDs for visualization.
Runs this query returning the first n rows as an array.
Runs this query returning the first n rows as an array.
This is modeled after RDD.take but never runs any job locally on the driver.
Runs this query returning the result as an iterator of InternalRow.
Runs this query returning the result as an iterator of InternalRow.
Note: this will trigger multiple jobs (one for each partition).
Called by generated Java class to finish the aggregate and return a KVIterator.
Returns all the RDDs of InternalRow which generates the input rows.
Returns all the RDDs of InternalRow which generates the input rows.
Note: right now we support up to two RDDs.
Overridden make copy also propagates sqlContext to copied plan.
Overridden make copy also propagates sqlContext to copied plan.
Creates a metric using the specified name.
Creates a metric using the specified name.
name of the variable representing the metric
Creates a row ordering for the given schema, in natural ascending order.
Creates a row ordering for the given schema, in natural ascending order.
Specifies how data is ordered in each partition.
Specifies how data is ordered in each partition.
Specifies how data is partitioned across different nodes in the cluster.
Specifies how data is partitioned across different nodes in the cluster.
Which SparkPlan is calling produce() of this one.
Which SparkPlan is calling produce() of this one. It's itself for the first SparkPlan.
Prepare a SparkPlan for execution.
Prepare a SparkPlan for execution. It's idempotent.
Finds scalar subquery expressions in this plan node and starts evaluating them.
Finds scalar subquery expressions in this plan node and starts evaluating them. The list of subqueries are added to subqueryResults.
Returns Java source code to process the rows from input RDD.
Returns Java source code to process the rows from input RDD.
Specifies any partition requirements on the input data for this operator.
Specifies any partition requirements on the input data for this operator.
Specifies sort order for each partition requirements on the input data for this operator.
Specifies sort order for each partition requirements on the input data for this operator.
A handle to the SQL Context that was used to create this plan.
A handle to the SQL Context that was used to create this plan. Since many operators need access to the sqlContext for RDD operations or configuration this field is automatically populated by the query planning infrastructure.
Whether this SparkPlan support whole stage codegen or not.
Whether this SparkPlan support whole stage codegen or not.
The subset of inputSet those should be evaluated before this plan.
The subset of inputSet those should be evaluated before this plan.
We will use this to insert some code to access those columns that are actually used by current plan before calling doConsume().
Blocks the thread until all subqueries finish evaluation and update the results.
Blocks the thread until all subqueries finish evaluation and update the results.
Hash-based aggregate operator that can also fallback to sorting when data exceeds memory size.