1 Introduction

13

1.1 Objectives

13

1.2 Structure and Content

13

1.3 Target Audience

14

1.4 Prerequisites

14

2 General Information on User Exits and BAdIs

17

2.1 Using User Exits

17

2.1.1 Finding and Viewing Enhancements

18

2.1.2 Creating a Project and Assigning Enhancements

18

2.1.3 Using Components of the Project

19

2.1.4 Activating and Deactivating Projects

21

2.2 Use of Classic BAdIs

22

2.2.1 Finding and Viewing Enhancements

22

2.2.2 Creating a BAdI Implementation

24

2.2.3 Working with Methods

25

2.2.4 Activating and Deactivating BAdIs

27

2.2.5 Enhanced Editing Options

28

2.3 Use of New BAdIs (Enhancement Spots)

29

2.3.1 SAP Enhancement Framework

29

2.3.2 Finding and Viewing Enhancement Spots

30

2.3.3 Creating Enhancement Implementations

31

2.3.4 Working with Methods

33

2.3.5 Activating and Deactivating BAdIs

34

3 User Exits and BAdIs in Purchasing

37

3.1 Customized Fields in Purchase Orders

37

3.1.1 Overview of the Implementation

38

3.1.2 Implementation of Custom Purchase Order Data and Function Group

42

3.1.3 Integration of Custom Fields into the BAdIs

54

3.1.4 Integration of Customer Fields into the Business Logic

61

3.1.5 Initializing, Reading, and Updating Data

68

3.1.6 Display of Error Messages

69

3.2 Customizing the Document Overview in Purchase Requisitions or Purchase Orders

72

3.2.1 Removal of a Standard Selection Variant

72

3.2.2 Inserting Custom Selection Variants

75

4 User Exits and BAdIs in External Services Management

83

4.1 Prepopulating Account Assignment for Service Lines

83

4.2 Input Check of the Service Lines

86

4.2.1 Prepopulating Fields in EXIT_SAPLMLSP_030

87

4.2.2 Input Check in EXIT_SAPLMLSP_031

88

4.3 Prepopulation of the Header Data in the Data Entry Sheet

89

5 User Exits and BAdIs in Inventory Management

93

5.1 Custom Fields in Transaction MIGO

93

5.1.1 Custom Fields: An Overview

94

5.1.2 Preparations in the ABAP Dictionary

97

5.1.3 Preparation of the Function Group

98

5.1.4 Preparation and Status Management in MB_MIGO_BADI

104

5.1.5 Activation of Custom Header Data

109

5.1.6 Activation of Custom Item Data

112

5.1.7 Updating the Data

117

5.2 Other Functions of the BAdI MB_MIGO_BADI

118

5.2.1 Noting Custom Data

119

5.2.2 Input Checks in Transaction MIGO

123

5.3 Checking and Prepopulating Standard Fields

125

5.3.1 Prepopulation of Storage Location and Text

125

5.3.2 Checking the Standard Fields

126

5.4 Check of the Earliest Delivery Date

127

5.5 Tolerance Limits for Scheduling Agreements

129

5.5.1 Overwriting Overdelivery Quantity

129

5.5.2 Overwriting Default Quantity

132

5.6 Enhancement of Reservations

134

5.6.1 Prepopulating Fields

135

5.6.2 Checking Entries

137

6 User Exits and BAdIs in the Valuation and Account Assignment Area

139

6.1 GR/IR Clearing Account

139

6.2 Overriding the Account Determination in the User Exit

141

7 User Exits and BAdIs in Logistics Invoice Verification

145

7.1 Custom Fields in Transaction MIRO

145

7.1.1 Overview of the Solution via BAdI

146

7.1.2 BAdI in Detail — Customizations in the ABAP Dictionary

148

7.1.3 Creating a Custom Dynpro with Table Control

151

7.1.4 Preparation of the Data in the BAdI

154

7.1.5 Back to the Dynpro

158

7.2 Overriding Tolerance Checks

164

7.2.1 Tolerance Limits in Customizing

165

7.2.2 Use of the Enhancement

166

8 Validation and Substitution of Accounting Documents

171

8.1 Validation of Accounting Documents

172

8.1.1 Callup Points

172

8.1.2 Steps

173

8.1.3 Example without Exit Routine

174

8.1.4 Example with Exit Routine

177

8.2 Substitution of Accounting Documents

182

8.2.1 Substitution without Exit Routine

183

8.2.2 Substitution with Exit Routine

185

8.2.3 Read Access to Data of the Source Document

188

Appendices

193

A User Exits and BAdIs in SAP Materials Management

193

A.1 Purchasing

194

A.2 External Services Management

221

A.3 Inventory Management

227

A.4 Valuation and Account Assignment

238

A.5 Logistics Invoice Verification

240

B The Author

257