參考第1章課件

Chapter1–IntroductionandfirstTheuseofABAPinSAPDevelopment oWorld!‘+Onlinehelpfor : WhatisEstablishedinABAP=AdvancedBusinessApplicationABAPusedtobeanabbreviationofAllgemeinerBerichtsAufbereitungsProzessor,theGermanmeaningof"genericreportpreparationprocessor",butwaslaterrenamedtoAdvancedBusinessApplicationProgramming.thereportlanguageforSAPR/2； ABAP和SAP緊密結(jié)合,尤其在開發(fā)報表方面除了和SAPCrystalreportTool要高效簡單.2.521.510.50

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12345678910WhatisABAP–SAP'scurrent tformNetWeaversupportsABAPandABAPWorkbenchABAPWorkbench提供各種系統(tǒng)開發(fā)、升級工具、和系SimilaritieswithCobolandWhatis Since1998objectorientedABAPobjects繼承和多態(tài)機制；類似于VB、VC等，ABAP也提供了 Multilanguagetform虛擬機,ABAP也有ABAPprocessor),各種網(wǎng)絡(luò)系統(tǒng)——其實這 WhatisEmbeddedSQLABAP語言中的OpenDatabaseSAP在ABAP開發(fā)環(huán)境層還提供了一套OpenSQL底層數(shù)據(jù)Reusabilityofcode一段代碼編寫好了后可以在任何一 Historicalviewon

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ABAPSource:FollowingABAP 的全稱是monBusinessOrientedLanguage,意在企業(yè)管理中,數(shù)值計算并不復(fù)雜,但數(shù)據(jù)處理信息量卻集、、傳送、分類排序、計算、以及報表打印、主要應(yīng)用 和系統(tǒng)，可說大部份重要商業(yè)應(yīng)用都是用Cobol開發(fā)的。 IFACC-STR=“EXIT”STOPRUNPERFORMVARYINGCYCVAR1FROM1BY1UNTILCYCVAR1>4IFACC-STR(CYCVAR1:1)=SPACEPERFORMMSG1ELSEIFACC-STR(CYCVAR1:1)NOT=“E”O(jiān)R“X”O(jiān)R“I”O(jiān)RPERFORM END-言。FORTRAN語言是FormulaTranslation的縮寫 能夠用數(shù)學表達的問題而設(shè)計的，其數(shù)值以也被地應(yīng)用在軍事系統(tǒng)方面。

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Source:FollowingSAPinstance安在一臺server程序在另一臺Applicationserver，而通?？蛻舳税惭b的SAPABAPprogramsexecuteunderthecontroloftheruntimesystem,whichispartoftheSAPkernel.TheruntimesystemisresponsibleforprocessingABAPstatements,controllingtheflowlogicofscreensandrespondingtoevents(suchasauserclickingonascreenbutton);inthisrespectitcanbeseenasaVirtualMachinecomparablewiththeJavaVM.AllABAPprogramsresideinsidetheSAPdatabase.TheyarenotstoredinseparateexternalfileslikeJavaorC++programs.InthedatabaseallABAPcodeexistsintwoforms:sourcecode,whichcanbeviewedandeditedwiththeABAPWorkbenchtools,andgeneratedcode,abinaryrepresentationsomewhatcomparablewithJavabytecode.AkeycomponentoftheABAPruntimesystemistheDatabaseInterface,whichturnsdatabase-independentABAPstatements("OpenSQL")intostatementsunderstoodbytheunderlyingDBMS("NativeSQL").ThedatabaseinterfacehandlesallthecommunicationwiththerelationaldatabaseonbehalfofABAPprograms;italsocontain trafeaturessuchasbufferingoftablesandfrequentlyaccesseddatainthelocalmemoryoftheapplicationserver.PrerequisitesforABAPAccesstorepository(ismaintained OwnpackageandowntransportPayattentiontothePrerequisitesforABAPAccesstorepository(ismaintained AccesstorepositoryisCheckaccessintransactionPrerequisitesforABAPOwnpackageandowntransportOwnpackagesenableyoutogroupyour ableyoutotransportnewtootherSAPYoumaydevelopnewprogramsusingthelocalpackagebuttransportofthesedevelopmentsisnotPrerequisitesforABAPPayattentiontotheOnlyusenamespaceYandZ,e.g.ZZ_*orYY_*astheseSAPusesnamespacefromAtoXforownprogramsandTransportrequests:releasingReleaseoftransportrequestscanbedoneinTransportManagerTASE09orSE10Firstreleasealltasks,thenreleasetransport Taskshavetobereleasedbyeach 一個releasedrequ

EveryABAPstatementmustendinaperiod(句號TokenswithinastatementmustbeseparatedbyatleastonespaceAnendoflineisequivalenttoaStatements arenotcase-Ifatextli linanABAPstatementextendsacrossmorethanoneline,thena‘&’charactermustbeusedtocombineasuccessionoftextli lsintoasingleone.USERPROMPT='Pleasedouble-clickonalineintheoutputlist''toseethecompletedetailsoftheTherulethattokensmustbeseparatedbyatleastonespaceextendseventooperators,parenthesesandothersymbols.Forexamplethefollowingcodeisincorrect:Thevariablenames(X,A,B,C),thenumericconstant1,theoperators"=","+"and"-"andtheparenthesesmustallbewhite-spacedelimited.Thecorrectcodeis:X=(A+B)-(C+1ABAPhas2waysofdefiningtextasaAnasterisk(*)intheleftmostcolumnofalinemakestheentirelineAdoublequotationmark(")anywhereonalinemakestherestofth