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java.lang.Objectedu.udo.cs.miningmart.operator.ExecutableOperator
edu.udo.cs.miningmart.operator.ConceptOperator
edu.udo.cs.miningmart.operator.SingleCSOperator
edu.udo.cs.miningmart.operator.RowSelection
edu.udo.cs.miningmart.operator.RowSelectionByRandomSampling
This operator randomly selects rows with a probability that is computed such that roughly as many rows are selected as are given in the parameter HowMany.
Field Summary |
Fields inherited from class edu.udo.cs.miningmart.operator.ExecutableOperator |
generatedSQLDefinitions |
Constructor Summary | |
RowSelectionByRandomSampling()
|
Method Summary | |
java.lang.String |
generateConditionForOp()
Abstract method to be implemented by all subclasses. |
java.lang.String |
generateSQLDefinition(java.lang.String selectPart)
Overrides the method from RowSelection because an own definition format is needed. |
int |
getHowMany()
|
java.lang.String |
getTypeOfNewColumnSet()
Overrides the method from RowSelection because for Sampling a table is more efficient. |
Methods inherited from class edu.udo.cs.miningmart.operator.RowSelection |
mustCopyFeature |
Methods inherited from class edu.udo.cs.miningmart.operator.SingleCSOperator |
generateColumnSetsForOp, generateSQLDefinition, getNewCSName, getTypeOfNewColumnSet |
Methods inherited from class edu.udo.cs.miningmart.operator.ConceptOperator |
compileStatement, createMetadata, createMetadataForOneBA, createSingleColumnSet, createStatement, estimateStatistics, generateColumns, getInputConcept, getNewCSName, getOutputConcept, getStringForSelection, setNewCSMultiStepBranch |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public RowSelectionByRandomSampling()
Method Detail |
public java.lang.String generateSQLDefinition(java.lang.String selectPart) throws M4CompilerError
generateSQLDefinition
in class RowSelection
M4CompilerError
edu.udo.cs.miningmart.m4.core.operator.SingleCSOperator#generateSQLDefinition(String)
,
edu.udo.cs.miningmart.m4.core.operator.RowSelection#generateSQLDefinition(String)
public java.lang.String generateConditionForOp()
RowSelection
generateConditionForOp
in class RowSelection
public java.lang.String getTypeOfNewColumnSet()
getTypeOfNewColumnSet
in class RowSelection
edu.udo.cs.miningmart.m4.core.operator.ConceptOperator#getTypeOfNewColumnSet(int)
public int getHowMany() throws M4CompilerError
M4CompilerError
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