edu.udo.cs.miningmart.operator
Class CreateManyToManyRelation

java.lang.Object
  edu.udo.cs.miningmart.operator.ExecutableOperator
      edu.udo.cs.miningmart.operator.CreateManyToManyRelation

public class CreateManyToManyRelation
extends ExecutableOperator

Author:

Martin Scholz

Field Summary

Fields inherited from class edu.udo.cs.miningmart.operator.ExecutableOperator

generatedSQLDefinitions

Constructor Summary

CreateManyToManyRelation()

Method Summary

void	compileStatement() Not required.
void	createStatement(boolean lazy) Prerequisites: Currently supports only a single Columnset per Concept.
Concept	getCrossConcept()
Concept	getFromConcept()
java.util.Collection	getKeysConceptA()
java.util.Collection	getKeysConceptB()
java.util.Collection	getKeysOfCrossToConceptA()
java.util.Collection	getKeysOfCrossToConceptB()
protected Relation	getRelation()
java.lang.String	getTableName()
Concept	getToConcept()

Methods inherited from class edu.udo.cs.miningmart.operator.ExecutableOperator

autoPrint, checkConditions, doPrint, doPrint, execute, executeBusinessSingleValueSqlRead, executeBusinessSingleValueSqlReadL, executeBusinessSqlRead, executeBusinessSqlWrite, executeM4SingleValueSqlRead, executeM4SingleValueSqlReadL, executeM4SqlRead, executeM4SqlWrite, getArtificalColumnName, getBusinessDbms, getHighestLoopNr, getM4Db, getM4Dbms, getM4ObjectFromCache, getName, getNextM4SequenceValue, getNumberOfLoops, getOperator, getOpParamsIterator, getParameter, getParameter, getParameterObjectsOfAllLoops, getSingleParameter, getSingleParameter, getStep, giveWarningForChangedInputData, handleAssertions, isDeselectedParameter, isLoopable, isManual, isStepable, load, print, putM4ObjectToCache, showCreateStatement, storedProceduresAvailable

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CreateManyToManyRelation

public CreateManyToManyRelation()

Method Detail

createStatement

public void createStatement(boolean lazy)
                     throws M4CompilerError

Prerequisites:

• Currently supports only a single Columnset per Concept.
• Concepts that are connected by a Relation should be materialized in advance.
• If there are no primary keys for the From- and ToConcepts in the database the operator tries to create them. This may fail for views.

Specified by:

createStatement in class ExecutableOperator

Parameters:

lazy - If TRUE, run in lazy mode: create atmost one output ColumnSet

Throws:

M4CompilerError

See Also:

ExecutableOperator.createStatement(boolean)

compileStatement

public void compileStatement()

Not required. Dummy method.

Specified by:

compileStatement in class ExecutableOperator

getFromConcept

public Concept getFromConcept()
                       throws M4CompilerError

Returns:

the Concept "TheFromConcept"

Throws:

M4CompilerError

getToConcept

public Concept getToConcept()
                     throws M4CompilerError

Returns:

the Concept "TheToConcept"

Throws:

M4CompilerError

getCrossConcept

public Concept getCrossConcept()
                        throws M4CompilerError

Returns:

the Concept representing the cross table at the relational level

Throws:

M4CompilerError

getRelation

protected Relation getRelation()
                        throws M4CompilerError

Returns:

the output Relation

Throws:

M4CompilerError

getTableName

public java.lang.String getTableName()
                              throws M4CompilerError,
                                     M4Exception

Returns:

the target table name for the materialized cross table.

Throws:

M4CompilerError

M4Exception

getKeysConceptA

public java.util.Collection getKeysConceptA()
                                     throws M4CompilerError

Returns:

Collection of Key Baseattributes of Concept A

Throws:

M4CompilerError

getKeysConceptB

public java.util.Collection getKeysConceptB()
                                     throws M4CompilerError

Returns:

Collection of Key Baseattributes of Concept B

Throws:

M4CompilerError

getKeysOfCrossToConceptA

public java.util.Collection getKeysOfCrossToConceptA()
                                              throws M4CompilerError

Returns:

Collection of Key Baseattributes part of the Cross Concept that point to Concept A

Throws:

M4CompilerError

getKeysOfCrossToConceptB

public java.util.Collection getKeysOfCrossToConceptB()
                                              throws M4CompilerError

Returns:

Collection of Key Baseattributes part of the Cross Concept that point to Concept B

Throws:

M4CompilerError