edu.udo.cs.miningmart.operator
Class CreateOneToManyRelation

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

public class CreateOneToManyRelation
extends ExecutableOperator

Author:

Martin Scholz

Field Summary

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

generatedSQLDefinitions

Constructor Summary

CreateOneToManyRelation()

Method Summary

void	compileStatement() Not required.
void	createStatement(boolean lazy) Prerequisites: Currently supports only a single Columnset per Concept.
protected java.util.Collection	getForeignKeyFromConcept()
protected Concept	getFromConcept()
protected java.util.Collection	getPrimaryKeyToConcept()
protected Relation	getRelation()
protected 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

CreateOneToManyRelation

public CreateOneToManyRelation()

Method Detail

createStatement

public void createStatement(boolean lazy)
                     throws M4CompilerError

Prerequisites:

• Currently supports only a single Columnset per Concept.
• The From-Concept connected by a Relation should be materialized in advance.
• If no primary key exists in the database for the ToConcept the operator tries to create one. 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

protected Concept getFromConcept()
                          throws M4CompilerError

Returns:

the Concept "TheFromConcept"

Throws:

M4CompilerError

getToConcept

protected Concept getToConcept()
                        throws M4CompilerError

Returns:

the Concept "TheToConcept"

Throws:

M4CompilerError

getRelation

protected Relation getRelation()
                        throws M4CompilerError

Returns:

the output Relation

Throws:

M4CompilerError

getPrimaryKeyToConcept

protected java.util.Collection getPrimaryKeyToConcept()
                                               throws M4CompilerError

Returns:

Collection of Key Baseattributes of Concept B

Throws:

M4CompilerError

getForeignKeyFromConcept

protected java.util.Collection getForeignKeyFromConcept()
                                                 throws M4CompilerError

Returns:

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

Throws:

M4CompilerError