实施学习资料Word文档格式.docx

实施学习资料Word文档格式.docx

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oDefiningDialogPrograms

∙DiscoveringReportComponents

oDiscoveringtheProgramRuntimeObject

oIntroducingProgramNamingConventions

∙CreatingYourFirstProgram

∙ExploringtheSourceCodeEditor

oUsingtheEditor:

InitialScreen

oExploringtheFunctionalityoftheSourceCodeEditor

∙GettingHelp

oObtainingF1Help

oObtainingR3LibraryHelp

∙FindingYourDevelopmentObjects

∙IntroducingtheR/3DataDictionary

oExploringTablesandStructures

oDisplayingaTableorStructureDefinition

oDisplayingDataintheTable

oDeterminingDisplayedFields

∙UnderstandingABAP/4Syntax

oIntroducingtheselectStatement

oUnderstandingTableWorkAreas

oIntroducingthewhereClause

oWorkingwithSystemVariables

oUsingtheChainOperator

oUsingtheselectsingleStatement

oCommentingCodeandFormalDocumentation

∙Summary

∙Q&

A

∙Workshop

oQuiz

oEditorExercises

oProgrammingExercises

Afteryoucompletethischapter,youshouldbeableto:

∙CreateandmodifysimpleABAP/4programs.

∙UsestandardfunctionsintheABAP/4editor.

∙UseF1andR/3Libraryhelpfunctions.

∙FindyourprogramsusingtheObjectBrowserandtheeditor.

∙DisplayatableanditscontentsusingtheDataDictionary.

∙Usethetablesandselectstatements.

∙Chainstatementstogetherusingthechainoperator.

∙Addcommentsanddocumentationtoyourprograms.

BeforeProceeding

Beforeproceeding,youshould:

∙BecomfortablewithaprogramminglanguagesuchasC,COBOL,orVisualBasic.Toobtainthefullbenefitfromthisandallfollowingchapters,youshouldalsohavetwoormoreyearsofpreviousdevelopmentexperience.

∙SetupyourinterfaceasrecommendedinDay1inthesection"

TheInterfaceMenu,"

ifyouhavenotdonesoalready.

∙PerformtheinstallprocedurefortheScreenCamsontheCD-ROM.Theinstallprocedureisdescribedinthereadme.txtfilefoundintherootdirectoryoftheCD-ROM.

ManyoftheproceduresinthisbookaredemonstratedusingScreenCams.ScreenCamsarelikemovies;

theyshowaseriesofscreens,includingkeystrokesandmousemovements,withadescriptivevoiceover.TheycanbefoundontheCD-ROMthatcomeswiththisbook.Seethereadme.txtfilefoundintherootdirectoryoftheCD-ROMformoreinformation.

ExploringtheDevelopmentEnvironment

Adevelopmentobjectisanythingcreatedbyadeveloper.Examplesofdevelopmentobjectsareprograms,screens,tables,views,structures,datamodels,messages,andincludes.

TheR/3systemcontainstoolsforcreatingandtestingdevelopmentobjects.ThesetoolsarelocatedintheR/3DevelopmentWorkbench.Toaccessanydevelopmenttool,yougototheworkbench.

Theworkbenchcontainsthesetoolstohelpyoucreatedevelopmentobjects:

∙TheABAP/4programeditorwhereyoucancreateandmodifyABAP/4sourcecodeandotherprogramcomponents

∙TheDataDictionarywhereyoucancreatetables,structures,andviews

∙TheDatamodelerwhereyoucandocumenttherelationshipsbetweentables

∙TheFunctionlibrarywhereyoucancreateglobalABAP/4functionmodules

∙Thescreenandmenupainterswhereyoucancreateauserinterfaceforyourprograms

Thefollowingtestingandsearchtoolsarealsoavailable:

∙theABAP/4Debugger

∙theSQLtracetoolusedtotuneSQLstatements

∙theruntimeanalyzerforoptimizingyourprogram'

sperformance

∙awhere-usedtoolforimpactanalysis

∙acomputer-aidedtesttoolforregressiontesting

∙arepositorysearchtoolforfindingdevelopmentobjects

∙theWorkbenchOrganizerforrecordingchangestoobjectsandpromotingthemintoproduction

Alldevelopmentobjectsareportable,meaningthatyoucancopythemfromoneR/3systemtoanother.Thisisusuallydonetomoveyourdevelopmentobjectsfromthedevelopmentsystemtotheproductionsystem.Ifthesourceandtargetsystemsareondifferentoperatingsystemsorusedifferentdatabasesystems,yourdevelopmentobjectswillrunas-isandwithoutanymodification.ThisistrueforallplatformssupportedbyR/3.（Foralistofsupportedhardwareandoperatingsystems,refertoTable1.1.）

DiscoveringProgramTypes

TherearetwomaintypesofABAP/4programs:

∙reports

∙dialogprograms

DefiningReports

Thepurposeofareportistoreaddatafromthedatabaseandwriteitout.Itconsistsofonlytwoscreens（seeFigure2.1）.

Figure2.1:

Theselectionscreenandtheoutputscreen.

Thefirstscreeniscalledtheselectionscreen.Itcontainsinputfieldsallowingtheusertoentercriteriaforthereport.Forexample,thereportmayproducealistofsalesforagivendaterange,sothedaterangeinputfieldswouldappearonthereport'

sselection