org.apache.spark.sql.execution

Class ExplainCommand

Object

org.apache.spark.sql.catalyst.trees.TreeNode<PlanType>

org.apache.spark.sql.catalyst.plans.QueryPlan<SparkPlan>

org.apache.spark.sql.execution.SparkPlan

org.apache.spark.sql.execution.ExplainCommand

All Implemented Interfaces:

java.io.Serializable, Logging, Command, scala.Equals, scala.Product

public class ExplainCommand
extends SparkPlan
implements Command, scala.Product, scala.Serializable

An explain command for users to see how a command will be executed.

Note that this command takes in a logical plan, runs the optimizer on the logical plan (but do NOT actually execute it).

:: DeveloperApi ::

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ExplainCommand(org.apache.spark.sql.catalyst.plans.logical.LogicalPlan logicalPlan, scala.collection.Seq<org.apache.spark.sql.catalyst.expressions.Attribute> output, boolean extended, SQLContext context)

Method Summary

Methods

Modifier and Type	Method and Description
RDD<org.apache.spark.sql.catalyst.expressions.Row>	execute() Runs this query returning the result as an RDD.
boolean	extended()
org.apache.spark.sql.catalyst.plans.logical.LogicalPlan	logicalPlan()
scala.collection.immutable.List<SQLContext>	otherCopyArgs()
scala.collection.Seq<org.apache.spark.sql.catalyst.expressions.Attribute>	output()

Methods inherited from class org.apache.spark.sql.execution.SparkPlan

codegenEnabled, executeCollect, makeCopy, outputPartitioning, requiredChildDistribution

Methods inherited from class org.apache.spark.sql.catalyst.plans.QueryPlan

expressions, org$apache$spark$sql$catalyst$plans$QueryPlan$$transformExpressionDown$1, org$apache$spark$sql$catalyst$plans$QueryPlan$$transformExpressionUp$1, outputSet, printSchema, schema, schemaString, transformAllExpressions, transformExpressions, transformExpressionsDown, transformExpressionsUp

Methods inherited from class org.apache.spark.sql.catalyst.trees.TreeNode

apply, argString, asCode, children, collect, fastEquals, flatMap, foreach, generateTreeString, getNodeNumbered, id, map, mapChildren, nextId, nodeName, numberedTreeString, sameInstance, simpleString, stringArgs, toString, transform, transformChildrenDown, transformChildrenUp, transformDown, transformUp, treeString, withNewChildren

Methods inherited from class Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.spark.sql.catalyst.trees.LeafNode

children

Methods inherited from interface scala.Product

productArity, productElement, productIterator, productPrefix

Methods inherited from interface scala.Equals

canEqual, equals

Methods inherited from interface org.apache.spark.Logging

initialized, initializeIfNecessary, initializeLogging, initLock, isTraceEnabled, log_, log, logDebug, logDebug, logError, logError, logInfo, logInfo, logName, logTrace, logTrace, logWarning, logWarning

Constructor Detail

ExplainCommand

public ExplainCommand(org.apache.spark.sql.catalyst.plans.logical.LogicalPlan logicalPlan,
              scala.collection.Seq<org.apache.spark.sql.catalyst.expressions.Attribute> output,
              boolean extended,
              SQLContext context)

Method Detail

logicalPlan

public org.apache.spark.sql.catalyst.plans.logical.LogicalPlan logicalPlan()

output

public scala.collection.Seq<org.apache.spark.sql.catalyst.expressions.Attribute> output()

Specified by:

output in class org.apache.spark.sql.catalyst.plans.QueryPlan<SparkPlan>

extended

public boolean extended()

execute

public RDD<org.apache.spark.sql.catalyst.expressions.Row> execute()

Description copied from class: SparkPlan

Runs this query returning the result as an RDD.

Specified by:

execute in class SparkPlan

otherCopyArgs

public scala.collection.immutable.List<SQLContext> otherCopyArgs()