public class SelectOperator extends Operator<SelectDesc> implements Serializable
Operator.Counter, Operator.OperatorFunc, Operator.State
Modifier and Type | Field and Description |
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protected ExprNodeEvaluator[] |
eval |
abortOp, alias, asyncInitOperations, bucketingVersion, cContext, childOperators, childOperatorsArray, childOperatorsTag, conf, CONTEXT_NAME_KEY, done, groupKeyObject, HIVE_COUNTER_CREATED_DYNAMIC_PARTITIONS, HIVE_COUNTER_CREATED_FILES, HIVE_COUNTER_FATAL, id, indexForTezUnion, inputObjInspectors, LOG, numRows, operatorId, out, outputObjInspector, parentOperators, reporter, runTimeNumRows, state, statsMap
Modifier | Constructor and Description |
---|---|
protected |
SelectOperator()
Kryo ctor.
|
|
SelectOperator(CompilationOpContext ctx) |
Modifier and Type | Method and Description |
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boolean |
acceptLimitPushdown()
used for LimitPushdownOptimizer
if all of the operators between limit and reduce-sink does not remove any input rows
in the range of limit count, limit can be pushed down to reduce-sink operator.
|
boolean |
columnNamesRowResolvedCanBeObtained() |
String |
getName()
Gets the name of the node.
|
static String |
getOperatorName() |
OperatorType |
getType()
Return the type of the specific operator among the
types in OperatorType.
|
protected void |
initializeOp(org.apache.hadoop.conf.Configuration hconf)
Operator specific initialization.
|
boolean |
isIdentitySelect()
Checks whether this select operator does something to the
input tuples.
|
void |
process(Object row,
int tag)
Process the row.
|
boolean |
supportAutomaticSortMergeJoin()
Whether this operator supports automatic sort merge join.
|
boolean |
supportSkewJoinOptimization() |
boolean |
supportUnionRemoveOptimization() |
abort, allInitializedParentsAreClosed, areAllParentsInitialized, augmentPlan, cleanUpInputFileChanged, cleanUpInputFileChangedOp, clone, cloneOp, cloneRecursiveChildren, close, closeOp, completeInitializationOp, createDummy, defaultEndGroup, defaultStartGroup, dump, dump, endGroup, flush, flushRecursive, forward, forward, forward, getAdditionalCounters, getBucketingVersion, getChildOperators, getChildren, getColumnExprMap, getCompilationOpContext, getConf, getConfiguration, getCounterName, getDone, getExecContext, getGroupKeyObject, getIdentifier, getIndexForTezUnion, getInputObjInspectors, getIsReduceSink, getMarker, getNextCntr, getNumChild, getNumParent, getOperatorId, getOpTraits, getOutputObjInspector, getParentOperators, getReduceOutputName, getSchema, getStatistics, getStats, initEvaluators, initEvaluators, initEvaluatorsAndReturnStruct, initialize, initialize, initializeChildren, initializeLocalWork, initOperatorId, isUseBucketizedHiveInputFormat, jobClose, jobCloseOp, logicalEquals, logicalEqualsTree, logStats, opAllowedAfterMapJoin, opAllowedBeforeMapJoin, opAllowedBeforeSortMergeJoin, opAllowedConvertMapJoin, passExecContext, preorderMap, processGroup, removeChild, removeChildAndAdoptItsChildren, removeParent, removeParents, replaceChild, replaceParent, reset, setAlias, setBucketingVersion, setChildOperators, setColumnExprMap, setCompilationOpContext, setConf, setDone, setExecContext, setGroupKeyObject, setIndexForTezUnion, setInputContext, setInputObjInspectors, setMarker, setNextVectorBatchGroupStatus, setOpTraits, setOutputCollector, setParentOperators, setReporter, setSchema, setStatistics, setUseBucketizedHiveInputFormat, startGroup, toString, toString
protected transient ExprNodeEvaluator[] eval
protected SelectOperator()
public SelectOperator(CompilationOpContext ctx)
protected void initializeOp(org.apache.hadoop.conf.Configuration hconf) throws HiveException
Operator
initializeOp
in class Operator<SelectDesc>
HiveException
public void process(Object row, int tag) throws HiveException
Operator
process
in class Operator<SelectDesc>
row
- The object representing the row.tag
- The tag of the row usually means which parent this row comes from.
Rows with the same tag should have exactly the same rowInspector
all the time.HiveException
public String getName()
Node
getName
in interface Node
getName
in class Operator<SelectDesc>
public static String getOperatorName()
public OperatorType getType()
Operator
getType
in class Operator<SelectDesc>
public boolean supportSkewJoinOptimization()
supportSkewJoinOptimization
in class Operator<SelectDesc>
public boolean columnNamesRowResolvedCanBeObtained()
columnNamesRowResolvedCanBeObtained
in class Operator<SelectDesc>
public boolean supportAutomaticSortMergeJoin()
Operator
supportAutomaticSortMergeJoin
in class Operator<SelectDesc>
public boolean supportUnionRemoveOptimization()
supportUnionRemoveOptimization
in class Operator<SelectDesc>
public boolean acceptLimitPushdown()
Operator
acceptLimitPushdown
in class Operator<SelectDesc>
public boolean isIdentitySelect()
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