edu.udo.cs.miningmart.operator
Class GenericFeatureConstruction

java.lang.Object
  edu.udo.cs.miningmart.operator.ExecutableOperator
      edu.udo.cs.miningmart.operator.FeatureConstruction
          edu.udo.cs.miningmart.operator.GenericFeatureConstruction

public class GenericFeatureConstruction

extends FeatureConstruction

This operator constructs a new feature by using SQL code (provided by the parameter sql_string) for the column definition for the new feature.

Version:

$Id: GenericFeatureConstruction.java,v 1.5 2006/04/11 14:10:11 euler Exp $

Author:

Timm Euler

Constructor Summary

GenericFeatureConstruction()

Method Summary

java.lang.String	generateSQL(Column targetColumn) Abstract method to be implemented by all subclasses.
java.lang.String	getSqlString()

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

compileStatement, createStatement, estimateStatistics, execute, generateColumnForOp, getCurrentLoopNumber, getTheInputConcept, getTheOutputAttribute, getTheOutputAttribute, getTheTargetAttribute, getTheTargetAttribute, load, writeResults

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

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

Methods inherited from class java.lang.Object

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

Constructor Detail

GenericFeatureConstruction

public GenericFeatureConstruction()

Method Detail

generateSQL

public java.lang.String generateSQL(Column targetColumn)
                             throws M4CompilerError

Description copied from class: FeatureConstruction

Abstract method to be implemented by all subclasses. In this method the SQL definition for the Column which this operator creates is created.

Specified by:

generateSQL in class FeatureConstruction

Parameters:

targetColumn - The Column to which this FeatureConstruction Operator is applied. Some subclasses may ignore this parameter.

Returns:

An SQL definition for the newly constructed Column.

Throws:

M4CompilerError - A simple exception object with an error message.

See Also:

edu.udo.cs.miningmart.m4.core.operator.FeatureConstruction#generateSQL(Column)

getSqlString

public java.lang.String getSqlString()
                              throws M4CompilerError

Returns:

the parameter "SQL_String" as a String

Throws:

M4CompilerError