Aggregates Using Aggregate Persistence Wizard in Oracle BI 11g

2/25/2015 OracleBISolutions:CreatingAggregatesUsingAggregatePersistenceWizardinOracleBI11g

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Friday,May24,2013

CreatingAggregatesUsingAggregatePersistenceWizardinOracleBI11g

ThistutorialshowsyouhowtocreateandmodelaggregatetablesusingtheAggregatePersistenceWizard.Datawarehouseperformancebottlenecksareoftenduetomeasureaggregation(forexample,summingordersatdifferentlevelsofadimensionalhierarchy)thatisbeingperformedatruntime.Havingidentifiedcandidateaggregatetablesforinclusioninyourdatawarehouse,youusetheAggregatePersistenceWizardtocreateandmodelaggregatestorelievethebottleneckandprecalculateandstorethedataforbetterqueryresponse.WhenyouusetheAggregatePersistenceWizardtocreateaggregates,itisimportantthatyouhaveafullyfunctionalbusinessmodel,withacompletesetofmeasures,dimensions,andhierarchies.Beforebuildingtableswiththewizard,youshouldhaveconceptuallydesignedthedesiredsetofaggregatesonpaper.Theconceptualdesignshouldincludethesetofaggregatestarsbyname,thesetoffactsineachstar,andthedimensionalityandgrainofeach.Tohelpyouindesigningaggregates,youcanenableusagetracking.Whenusagetrackingisenabled,theOracleBIServercollectsusagetrackingdataforeachquery,anditinsertsthestatisticsdirectlyintoadatabasetable.Usagetrackingisalsohelpfulindeterminingwhichuserqueriesarecreatingperformancebottlenecks,basedonqueryfrequencyandresponsetime.Tolearnhowtosetupusagetracking,youcangothroughthetutorialonSettingUpUsageTrackinginOracleBI11g.Youshouldalsodeterminethedatabasewheretheaggregatesaretobedeployedin.Thisisusuallytheexistingdatabasethatcontainsthebasetablesthatarebeingaggregated.However,thetablescanbeplacedinadifferentdatabase.TheseminimumrequirementsforthelogicalandphysicaldesigndetailsaresufficienttocreatethetableswiththeAggregatePersistenceWizard.YoucouldusetheModelCheckertoseeifthereareanyerrorsinthemodel.

Beforestartingthistutorial,youshould:

HaveaccesstoorhaveinstalledOracleDatabase11.2orhigher

HaveaccesstoorhaveinstalledOracleBIEE11.1.1.7OBIEE

DownloadtheSamplerpdfromhere.

HaveSampleAppsrpdrunninginonlinemode.

SettingUptheDataSchemainOracleDatabase

TocreatetherequiredtablespaceandBISAMLE_EXAuser(replacepathstoappropriatevaluesonyourenvironment)executethefollowingSQLstatements:

1. createtablespaceBISAMPLE_EXAdatafile'\home\oracle\app/oracle\oradata\orcl\bisample_exa.dbf'size10MautoextendondefaultcompresscreatetemporarytablespaceBISAMPLE_EXA_TEMPtempfile'\home\oracle\app\oracle\oradata\orcl\bisample_exa_temp.dbf'size10Mautoextendon

2. createuserBISAMPLE_EXAidentifiedbyBISAMPLE_EXAdefaulttablespaceBISAMPLE_EXAtemporarytablespaceBISAMPLE_EXA_TEMPgrantdbatoBISAMPLE_EXA

3. Copythedumpfilefromhere.Unzipandcopyovertoyourdatabasemachine.LogintoBISAMPLE_EXAschemaandcreateadirectoryobjecttopointtothedirectorywhereyouvecopiedthisfile.ExecutetheSQLstatement:Createorreplacedirectorysampleappas'C:\bisample_exa'

4.OpenWindowscommandandnavigatetothedirectorycontainingbisample_exa.dmpfile.Importthedumpusingthefollowingcommand:impdpBISAMPLE_EXA/BISAMPLE_EXAdirectory=sampleappdumpfile=bisample_exa.dmpschemas=bisample_exa

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5.Onceimported,logintoBISAMPLE_EXAschemaandverifyalltablesarecreatedandloaded(SAMP_REVENUE_Ftableshouldhave5millionrows)

6. DownloadthetutorialSampleApp30212AforAPrpdfromhereandmakeitonline.ThisisaSampleAppsrpdmodifiedforthistutorial.Forthetutorial,BSampleSalesExasubjectareawillbeused.EnterAdmin123astheRepositorypassword.

7. Createaquerywiththefollowing:

Time.T02PerNameMonth

Products.P4Brand

Offices.D4Company

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BaseFacts.1Revenue

BaseFacts.2BilledQuantity

BaseFacts.3DiscountAmount

BaseFacts.4PaidAmount

8. ClickResults.

9. Notehowlongittakesforthequerytoreturntheresults.

CreatingtheAggregates

Inthistopic,youunderstandtheroleandfunctionoftheAggregatePersistenceWizardincreatingandmodelingaggregatestoresolvequerybottlenecks.Aggregatetablesstoreprecomputedresults,whicharemeasuresthathavebeenaggregated(typicallysummed)overasetofdimensionalattributes.Usingaggregatetablesisaverypopulartechniqueforspeedingupqueryresponsetimesindecisionsupportsystems.Thiseliminatestheneedforruntimecalculationsanddeliversfasterresultstousers.Thecalculationsaredoneaheadoftimeandtheresultsarestoredintables.Aggregatetablesshouldhavefewerrowsthanthenonaggregatetablesand,therefore,processingshouldbequicker.TheaggregatenavigationcapabilityofOracleBIServerallowsqueriestousetheinformationstoredinaggregatetablesautomatically,withoutqueryauthorsortoolshavingtospecifyaggregatetablesinthequeries.OracleBIServerallowsuserstoconcentrateonaskingtherightbusinessquestions,becausetheserverdecideswhichtablesprovidethefastestanswers.ForOracleBIServertohaveenoughinformationtonavigatetoaggregatetables,certainmetadataintherepositorymustbecorrectlyconfigured.ThetraditionalprocessofcreatingaggregatesforOracleBIServerqueriesismanual.Itcanbetedious,requiringcomplicateddatadefinitionlanguage(DDL)anddatamanipulationlanguage(DML)scriptstobewrittenforcreatingtablesinthedatabasesinvolved.Additionally,theseaggregatedtablesneedtobemappedtotherepositorymetadatatobeavailableforqueries.Thisisatimeconsumingand,possibly,errorproneprocess.TheAggregatePersistenceWizardenablesyoutoautomatethecreationofphysicalaggregatetablesandtheircorrespondingobjectsintherepository.TheAggregatePersistenceWizardcreatesanOracleBIEnterpriseEditionSQLscript,whichisexecutedbytheBIServer.Thescriptspecifieseachaggregatetabletobecreated,thefactsfromthebusinessmodelthatshouldbeincludedinit,anditsdimensionsandgrain.WhentheBIServerrunstheaggregatepersistenceSQLscript,itgeneratesDDLtocreatetherequiredtablesinthetargetdatabase,internalinstructionstogeneratethecorrespondingphysicalandaggregatenavigationmetadata,anddatamanipulationlanguage(DML)toaggregateandloaddatafromthebasetablesintotheaggregatetables.Theaggregatepersistencescriptisintendedtoberunaftereachextraction,transformation,andloading(ETL)ofthebasetables,typicallynightly.ThiscanbedonebyanOracleBIEEJobManagerjob,oritcanberunasa.batoranyotherscriptcalledbyacustomprogram.ThedefaultprefixSA_isautomaticallyaddedtodimension(level)aggregates.YoucanchangethisdefaultprefixbyupdatingtheAGGREGATE_PREFIXparameterintheAGGREGATE_PERSISTENCEsectionoftheNQSConfig.INIfile:AGGREGATE_PREFIX="prefix_name"Inthistopic,youusetheAggregatePersistenceWizardtocreateandmodelaggregatetablestosupportqueryperformance.Theconceptualdesignofyouraggregatestarincludesthefollowingcharacteristics.Measures Dimension/Grain SourceDatabase

BaseFacts.1Revenue",2BilledQuantity",3DiscountAmount,4PaidAmount

Products/P4BrandTime/T02PerNameMonth"Office/"D4Comapny"

BISAMPLE_EXA

1.OpenSampleApp30212forAP.rpdinonlinemodeinBIAdministrationTool.EnterAdmin123astheRepositorypassword.Entertheuseridandpasswordforyourinstallation.ForthistutorialwewilluseasUserweblogicandPasswordwelcome1.MakeanoteoftheODBCdatasourcename.Inthisexampleitiscoreapplication_OH1291352497.

2. ClickFile>CheckGlobalConsistency.

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3. TheConsistencycheckisdone.

4.OncetheconsistencycheckiscompleteConsistencyCheckManagerwindowisopened.Makesuretherearenoerrors.CloseConsistencyCheckManagerandsavetherpd.Ifthereareanyerrors,pleaseremovetheerrors.

YoucanuseModelCheckManagertocheckyourrepositorymetadataforissuesthatmightaffectthesuccessoftheaggregatepersistenceengine,suchasidentifyinglevelprimarykeysthatarenotunique.AlthoughtheuserexperienceofrunningModelCheckManagerisverysimilartorunningtheConsistencyCheckManager,therearethreekeydifferencesbetweenthetwotools:

UnliketheConsistencyCheckManager,ModelCheckManagerrequiresaccesstobackenddatasourcesforsomechecks.Becausesomeofthebackendqueriescanbeexpensive,itisrecommendedtorunModelCheckManagerduringoffpeakperiods.

ModelCheckManagercanonlyberuninonlinemode.

ModelCheckManagerdoesnotmakeanychangestorepositorymetadataitonlyflagspossibleproblems.

SimilartotheConsistencyCheckManager,ModelCheckManagerreturnsbotherrorandwarningmessages.YoumustfixerrorsidentifiedbyModelCheckManager,ortheaggregatepersistenceenginemightfailtocreateaggregates.Itisrecommendedthatyoufixwarnings,butnotrequired.RunModelCheckManagerrightbeforeyouruntheAggregatePersistenceWizard.Alternatively,youcanrunModelCheckManagertoidentifyproblemsforselectedobjectsafterinitialaggregatecreationfailure.IfthereareerrorsinModelChecker,makesuretheyarenotrelatedtothedimensionsyouareselectingtobuildtheaggregate.SincetherpdforthistutorialisamodifiedversionofSampleAppsrpd,runtheModelCheckerforthedimensionsthatwillbeusedforthistutotrial.TorunModelCheckManagerforthedimensionsperformthefollowingsteps:

1. IntheBusinessModelandMappingLayer,selecttheD0Timedimensionin01SampleAppExabusinessmodel.Rightclickand

RunningtheModelChecker



selectCheckModel.

2.ModelCheckerhasthefollowingtwooptions:

Complete:ChecksallobjectsintheBusinessModelandMappinglayeroftheOracleBIrepository.

FilteredbyStatistics:ChecksonlyfacttableobjectsandassociateddimensionsintheBusinessModelandMappinglayerthathavebeenactivelyqueriedaccordingtothestatisticstable.Selectthisoptiontospeeduptheprocessforlargerepositories.ThisoptionisonlyavailableontheOracleExalyticsMachine.IfyouattempttofilterbystatisticsonanonExalyticssystem,orifyouattempttofilterwhenthestatisticstableisnotavailable,awarningappearsexplainingthatModelCheckManagercannotfilterbystatistics.

3. ClickComplete.WhencompleteModelCheckerManagerwindowwillshowalltheerrors,ifany.Makesuretherearenoerrors.CloseModelCheckerManager.

4. SimilarlyruntheModelCheckerfortheProductandOfficedimensions.Ineachcase,makesuretherearenoerrors.CloseModelCheckerManager.

1. SelectTools>Utilitiesfromthemenubar.

UsingtheAggregatePersistenceWizard



2. FromtheUtilitieswindowsselectAggregatePersistenceandclickExecute.TheAggregatePersistencewizardopens.

3. IntheAggregatePersistenceSelectFileLocationwindowenterthenameoftheSQLscriptfileasaggregate.sql.Enterthefolderwherethisfilewillbeplaced.ClickNext.

4. IntheAggregatePersistenceSelectBusinessMeasureswindow,selectthesubjectarea01SampleAppExaandfollowingmeasuresfromtheF0SalesBaseMeasurestable:

1Revenue2BilledQuantity3DiscountAmount4PaidAmount

ClickNext.



5. IntheAggregatePersistenceSelectLevelswindow,selectdimensionH0Time.Month,H1Products.ProductBrand,andH3Offices.Company.ClickNext.

6. IntheAggregatePersistenceSelectConnectionPoolwindow,selectthedatabaseas02SampleAppExaData(ORCL).MakesureyouselecttheOracledatabase(ORCL)andnotEssbase(ESSB).SelectCatalog/Schemaas02SampleAppExaData(ORCL)>BISAMPLE_EXA.SelecttheConnectPoolExaSampleConnection.Changethedefaultaggregatetablenametoag_BISAMPLE_EXA.ClickNext.



7. IntheAggregatePersistenceFinishwindow,checkthescript.SelectIamdoneandclickNext.

8. IntheAggregatePersistenceFinishScriptwindow,checkthatthescriptiscreatedandplacedinthespecifiedfolder.ClickFinish.



9.Opentheaggragate.sqlscriptfileineditmode.Checkthescript.

1.Openacommandwindow.Changedirectorytoc:\bi\instances\intance1\bifoundation\OracleBIApplication\coreapplications\setup.Yourenvironmentmayhaveadifferentpath.Enterandrunbiinitinthecommandwindow.

2. Asecondwindowopens.Atthepromptinthesecondcommandwindow,enter:nqcmddcoreapplication_OH1291352497uweblogicsc:\temp\aggregates.sqldIstheODBCdatasourcenamefortheOracleBIServertowhichyouwanttoconnect.uUsernamesSQLscriptfileyoucreatedusingtheAggregatePersistencewizard.Forthistutorialitisc:\temp\aggregate.sql

3. Enterwelcome1asthepasswordandpressEnter.

4.WaittillyougetStatementexecutesucceededmessage.

RunningnqcmdinCommandLine



YoucompletedrunningthenqcmdcommandforcreatingaggregateswithAggregatePersistenceWizard..Note:Ifthestatementexecutionfailed,makesureyoudonothaveanysummarytablesinthedatabase,BusinessModellayer,andinthePhysicallayerforthedimensionsyouareusing,priortorunningthenqcmdcommand.YoucanusetheDeleteaggregatescommandtodeletethem.

VerifyingthattheAggregateswereSuccessfullyCreated

Inthissectionyouwillcheckwhetheralltheaggregatesweresuccessfullycreated.

1. CloseandopentheBIAdministrationToolinonlinemode.InthePhysicalLayer,ensurethattheaggregateswerecreatedinBISAMPLE_EXAschema.Thereshouldbeonenewag_BISAMPLE_EXAaggregatetablewiththecolumnsyouselectedforaggregation.

2. ScrolldownthePhysicalLayerandyoushouldhavethreedimensionaggregatestablesbeginningwithSA_.Oneforeachdimensionselected.

VerifyingtheAggregatesinPhysicalLayer



3. ViewcompanynamesfromOfficesdimensionaggregatetable.Checkoutobjectswhenprompted.

4. UpdaterowcounttoseethenumberofrowsforFactaggregate.Thereare648rowsinthetable.Checkoutobjectswhenprompted.

5. Updaterowcountsforallthenewaggregatesandyoushouldseethefollowingrowcount.Checkoutobjectswhenprompted.ag_BISAMPLE_EXA684rowsSA_Month*79SA_Product*9SA_Offices*3

6. Doubleclickag_BISAMPLE_EXAtoopenthephysicaldialogbox,clicktheForeignKeystab.Verifythatthejoinsarecreatedbetweenag_BISAMPLE_EXAandthethreedimensionaggregates.

7. Doubleclicktheforeignkeyforthemonthdimension,toviewtherelationshipinthePhysicalForeignKeydialogbox.



8. Doubleclicktheforeignkeyfortheproductbranddimension,toviewtherelationshipinthePhysicalForeignKeydialogbox.

SimilarlyyoucancheckforOfficeCompany.

1. InBusinessModelandMappingLayer,openSourcesfolderfor01SampleAppExa.F0SalesBaseMeasuresandconfirmthatanewlogicaltablecalled02SampleAppExaData(ORCL)_BISAMPLE_Exa_ag_BISAMPLE_EXAiscreated.

2.OpenSourcesfolderforD0Timedimensionandconfirmthatanewlogicaltablecalled01SampleApp_ExaData(ORCL)_BISAMPLE_EXA_SA_Monthxxxxxxxiscreated.

3.OpenSourcesfolderforD1Products(LevelBasedHier)dimensionandconfirmthatanewlogicaltablecalled01SampleAppData(ORCL)_BISAMPLE_SA_Productxxxxxxxiscreated.

VerifyingtheAggregatesintheBusinessModelandMappingLayer



4.OpenSourcesfolderforD3Officesdimensionandconfirmthatanewlogicaltablecalled02SampleAppExaData(ORCL)_BISAMPLE_Exa_SA_Officesxxxxxxxiscreated.

5. Doubleclickthe01SampleAppData(ORCL)_BISAMPLE_ag_BISAMPLElogicaltablesource.ClickCheckOut.IntheGeneraltabandconfirmthatthe02SampleAppExaData(ORCL)_BISAMPLE_Exa_ag_BISAMPLE_Exalogicaltablesourcemapstothe02SampleAppExaData(ORCL).._BISAMPLE_Exa.ag_BISAMPLE_Exaphysicaltable.

6. ClicktheColumnMappingtabandconfirmthatthelogicalmeasurecolumnsmaptocorrespondingphysicalcolumnsintheag_BISAMPLE_Exaphysicaltable.

7. ClicktheContenttabandconfirmthatthelogicallevelsaresetcorrectly.

8. ClickCanceltoclosetheLogicalTableSourcedialogbox.RepeatforD0Time,D1Products(LevelBasedHier),andD3Officestoconfirmthatthelogicallevelsaresetcorrectlyforthenewlogicaltablesourcesgeneratedbytheaggregatepersistencewizard.



9. Closealldialogboxes.Note:YoudonothavetodoanythinginthePresentationLayer.

CreatingAnalysistoUsetheAggregates

1. SignintoOracleBIasweblogicwithpasswordwelcome1.ReturntoAnalysesEditorandcreateanewanalysisinBSampleSalesExasubjectarea.

2. Reloadservermetadataorifrequiredrestartalltheservices.

3. Createaquerywithallyourselections.Selectthefollowing:

Time.T02PerNameMonthProducts.P4BrandOffices.D4CompanyBaseFacts.1RevenueBaseFacts.2BilledQuantityBaseFacts.3DiscountAmountBaseFacts.4PaidAmount

4. ClickResults.



Noticehowfastthequeryreturned.

5. Youcansavethequery.ClicktheAdministrationlinkatthetop.ClickManageSessionfromtheAdministrationtab.

6. Inspectthequerystatementandconfirmthatthequeryusedthecolumnsyourequested.

7. ClickViewLogintheActioncolumn.



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8. Scrolldownandinspectthequerylog.Confirmthatthequeryusedtheag_BISAMPLE_EXAaggregatetableandtherelateddimensionSA_Month,SA_ProductBrand,andSA_OfficesCompanyaggregates.

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Aggregates Using Aggregate Persistence Wizard in Oracle BI 11g