org.apache.hadoop.hive.ql.exec
Class ExplainTask
java.lang.Object
org.apache.hadoop.hive.ql.exec.Task<ExplainWork>
org.apache.hadoop.hive.ql.exec.ExplainTask
- All Implemented Interfaces:
- Serializable, Node
public class ExplainTask
- extends Task<ExplainWork>
- implements Serializable
ExplainTask implementation.
- See Also:
- Serialized Form
Nested classes/interfaces inherited from class org.apache.hadoop.hive.ql.exec.Task |
Task.FeedType |
Fields inherited from class org.apache.hadoop.hive.ql.exec.Task |
BACKUP_COMMON_JOIN, backupChildrenTasks, backupTask, childTasks, clonedConf, COMMON_JOIN, conf, console, CONVERTED_LOCAL_MAPJOIN, CONVERTED_MAPJOIN, CONVERTED_SORTMERGEJOIN, db, driverContext, feedSubscribers, id, initialized, isdone, jobID, LOCAL_MAPJOIN, LOG, MAPJOIN_ONLY_NOBACKUP, NO_TAG, parentTasks, queryPlan, queued, started, taskCounters, taskHandle, taskTag, work |
Method Summary |
int |
execute(DriverContext driverContext)
This method is overridden in each Task. |
org.json.JSONObject |
getJSONLogicalPlan(PrintStream out,
ExplainWork work)
|
org.json.JSONObject |
getJSONPlan(PrintStream out,
ExplainWork work)
|
String |
getName()
Gets the name of the node. |
List<FieldSchema> |
getResultSchema()
|
StageType |
getType()
Should be overridden to return the type of the specific task among the types in StageType. |
String |
outputAST(String treeString,
PrintStream out,
boolean jsonOutput,
int indent)
|
org.json.JSONObject |
outputDependencies(PrintStream out,
boolean jsonOutput,
List<Task<? extends Serializable>> rootTasks,
int indent)
|
org.json.JSONObject |
outputStagePlans(PrintStream out,
ExplainWork work,
List<Task<? extends Serializable>> rootTasks,
int indent)
|
Methods inherited from class org.apache.hadoop.hive.ql.exec.Task |
addDependentTask, cloneConf, done, executeTask, fetch, getAndInitBackupTask, getBackupChildrenTasks, getBackupTask, getChildren, getChildTasks, getCounters, getDependentTasks, getFeedSubscribers, getId, getInitialized, getJobID, getParentTasks, getQueryPlan, getQueued, getReducer, getTaskHandle, getTaskTag, getTopOperators, getWork, hasReduce, ifRetryCmdWhenFail, initialize, isLocalMode, isMapRedLocalTask, isMapRedTask, isRunnable, pushFeed, receiveFeed, removeDependentTask, removeFromChildrenTasks, requireLock, setBackupChildrenTasks, setBackupTask, setChildTasks, setDone, setFeedSubscribers, setId, setInitialized, setLocalMode, setParentTasks, setQueryPlan, setQueued, setRetryCmdWhenFail, setStarted, setTaskTag, setWork, shutdown, started, subscribeFeed |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
EXPL_COLUMN_NAME
public static final String EXPL_COLUMN_NAME
- See Also:
- Constant Field Values
ExplainTask
public ExplainTask()
getJSONLogicalPlan
public org.json.JSONObject getJSONLogicalPlan(PrintStream out,
ExplainWork work)
throws Exception
- Throws:
Exception
getJSONPlan
public org.json.JSONObject getJSONPlan(PrintStream out,
ExplainWork work)
throws Exception
- Throws:
Exception
execute
public int execute(DriverContext driverContext)
- Description copied from class:
Task
- This method is overridden in each Task. TODO execute should return a TaskHandle.
- Specified by:
execute
in class Task<ExplainWork>
- Returns:
- status of executing the task
outputAST
public String outputAST(String treeString,
PrintStream out,
boolean jsonOutput,
int indent)
throws org.json.JSONException
- Throws:
org.json.JSONException
outputDependencies
public org.json.JSONObject outputDependencies(PrintStream out,
boolean jsonOutput,
List<Task<? extends Serializable>> rootTasks,
int indent)
throws Exception
- Throws:
Exception
outputStagePlans
public org.json.JSONObject outputStagePlans(PrintStream out,
ExplainWork work,
List<Task<? extends Serializable>> rootTasks,
int indent)
throws Exception
- Throws:
Exception
getType
public StageType getType()
- Description copied from class:
Task
- Should be overridden to return the type of the specific task among the types in StageType.
- Specified by:
getType
in class Task<ExplainWork>
- Returns:
- StageType.* or null if not overridden
getName
public String getName()
- Description copied from interface:
Node
- Gets the name of the node. This is used in the rule dispatchers.
- Specified by:
getName
in interface Node
- Returns:
- String
getResultSchema
public List<FieldSchema> getResultSchema()
- Overrides:
getResultSchema
in class Task<ExplainWork>
Copyright © 2012 The Apache Software Foundation