ABAP+Development

本文提供了一个关于ABAP开发的全面指南,涵盖了ABAP开发的基础知识和技术要点。通过本文,读者可以了解到ABAP开发的重要概念、最佳实践以及如何利用ABAP进行有效的应用程序开发。
Contents Foreword ...................................................................................... 15 Preface .......................................................................................... 17 Introduction ................................................................................. 19 PART I Basic Principles 1 Overview of SAP HANA ................................................ 29 1.1 Software Components of SAP HANA .............................. 29 1.1.1 SAP HANA Database ......................................... 31 1.1.2 SAP HANA Studio ............................................. 31 1.1.3 SAP HANA Client .............................................. 33 1.1.4 SAP HANA Function Libraries ........................... 34 1.1.5 Software for Data Replication ............................ 34 1.1.6 Software for Direct Data Access ........................ 35 1.1.7 Lifecycle Management Components .................. 36 1.2 Basic Principles of In-Memory Technology ..................... 37 1.2.1 Hardware Innovations ....................................... 37 1.2.2 Software Innovations ......................................... 41 1.3 Architecture of the In-Memory Database ....................... 51 1.4 Application Cases for SAP HANA ................................... 53 1.5 How SAP HANA Affects Application Development ........ 56 1.5.1 New Technical Options ..................................... 56 1.5.2 Code Pushdown ................................................ 57 1.5.3 Database as Whitebox ....................................... 59 1.5.4 Required Qualifications for Developers ............. 61 2 Introducing the Development Environment ................. 63 2.1 Overview of Eclipse ....................................................... 63 2.2 SAP’s Eclipse Strategy .................................................... 66 2.2.1 Unbundling of Eclipse and SAP Software ........... 67 2.2.2 Central Update Site ........................................... 67 2.3 Installing the Development Environment ....................... 69 2.3.1 Installing SAP HANA Studio .............................. 69 8 Contents 2.3.2 Installing the ABAP Development Tools for SAP NetWeaver ................................................. 70 2.4 Getting Started in the Development System ................... 72 2.4.1 Basic Principles of Eclipse .................................. 72 2.4.2 ABAP Development Tools for SAP NetWeaver ... 75 2.4.3 SAP HANA Studio ............................................. 85 3 Database Programming Using SAP NetWeaver AS ABAP ........................................................................ 103 3.1 SAP NetWeaver AS ABAP Architecture .......................... 105 3.1.1 Database Interface ............................................ 107 3.1.2 Role of the Database for the ABAP Application Server ............................................. 109 3.1.3 Data Types ........................................................ 110 3.2 ABAP Database Access .................................................. 116 3.2.1 ABAP Data Dictionary ....................................... 117 3.2.2 Open SQL ......................................................... 122 3.2.3 Database Views in the ABAP Data Dictionary .... 132 3.2.4 Database Access via Native SQL ........................ 133 3.2.5 Secondary Database Connections ...................... 139 3.3 Analyzing Database Accesses Using the SQL Trace ......... 143 3.3.1 Statement Transformations ................................ 143 3.3.2 Secondary Connections ..................................... 150 3.3.3 Native SQL ........................................................ 151 3.3.4 Buffer ................................................................ 152 PART II Introduction to ABAP Programming with SAP HANA 4 View Modeling in SAP HANA Studio ........................... 157 4.1 Attribute Views ............................................................. 160 4.1.1 Basic Principles ................................................. 161 4.1.2 Creating Attribute Views ................................... 164 4.1.3 Calculated Fields ............................................... 172 4.1.4 Hierarchies ........................................................ 174 4.1.5 Attribute Views for Time Values ........................ 176 9 Contents 4.1.6 Runtime Artifacts and SQL Access for Attribute Views ................................................. 179 4.2 Analytic Views ............................................................... 180 4.2.1 Basic Principles ................................................. 181 4.2.2 Creating Analytic Views ..................................... 183 4.2.3 Calculated Key Figures ...................................... 186 4.2.4 Currency Conversion and Unit Conversion ........ 187 4.2.5 Runtime Artifacts and SQL Access for Analytic Views .................................................. 191 4.3 Calculation Views .......................................................... 192 4.3.1 Basic Principles ................................................. 193 4.3.2 Graphical Modeling of Calculation Views .......... 195 4.3.3 Implementing Calculation Views via SQLScript .......................................................... 197 4.3.4 Runtime Artifacts and SQL Access for Calculation Views .............................................. 202 4.4 Accessing Column Views via Microsoft Excel .................. 203 4.5 Using SAP HANA Views in ABAP ................................... 205 4.5.1 Access via Native SQL ....................................... 205 4.5.2 External Views in the ABAP Data Dictionary ...... 207 4.5.3 Options for Accessing External Views ................ 210 4.5.4 Recommendations ............................................ 211 5 Programming Options in SAP HANA ............................ 215 5.1 Overview of SQLScript ................................................... 215 5.1.1 Qualities of SQLScript ....................................... 216 5.1.2 Processing SQLScript ......................................... 222 5.2 Implementing Database Procedures ............................... 223 5.2.1 Basic Principles of Database Procedures ............ 223 5.2.2 Creating Database Procedures ........................... 225 5.2.3 Using Variables .................................................. 237 5.2.4 Calculation Engine Plan Operator ..................... 239 5.2.5 Imperative Enhancements ................................. 250 5.2.6 Accessing System Fields .................................... 252 5.2.7 Error Handling ................................................... 254 5.3 Using Procedures in ABAP ............................................. 255 5.3.1 Access Using Native SQL ................................... 256 10 Contents 5.3.2 Defining Database Procedure Proxies ................ 263 5.3.3 Calling Database Procedure Proxies ................... 265 5.3.4 Adjusting Database Procedure Proxies ............... 267 6 Application Transport ................................................... 269 6.1 Basic Principles of the Transport System ......................... 271 6.1.1 Transport in SAP NetWeaver AS ABAP .............. 271 6.1.2 Transport in SAP HANA ..................................... 276 6.2 Combined ABAP/SAP HANA Transport .......................... 285 6.2.1 HANA Transport Container ................................ 286 6.2.2 Enhanced Transport System ............................... 292 7 Runtime and Error Analysis with SAP HANA ............... 293 7.1 Overview of the Tools Available ..................................... 294 7.2 Error Analysis ................................................................. 296 7.2.1 Unit Tests .......................................................... 296 7.2.2 Dump Analysis .................................................. 299 7.2.3 Tracing in SQLScript .......................................... 301 7.2.4 Debugging SQLScript ........................................ 302 7.3 ABAP Code Analysis ...................................................... 305 7.3.1 Checks and Check Variants ................................ 305 7.3.2 Checks in the Development Infrastructure ......... 309 7.3.3 Global Check Runs in the System ...................... 311 7.4 Runtime Statistics and Traces ......................................... 313 7.4.1 Runtime Statistics .............................................. 314 7.4.2 ABAP Trace and ABAP Profiler ........................... 318 7.4.3 SQL Trace ......................................................... 326 7.4.4 Single Transaction Analysis ............................... 330 7.4.5 Explain Plan ...................................................... 331 7.4.6 SAP HANA Plan Visualizer ................................ 333 7.5 System-Wide SQL Analyses ............................................ 337 7.5.1 DBA Cockpit .................................................... 338 7.5.2 SQL Monitor .................................................... 342 7.6 SQL Performance Optimization ...................................... 346
源码来自:https://pan.quark.cn/s/a3a3fbe70177 AppBrowser(Application属性查看器,不需要越狱! ! ! ) 不需要越狱,调用私有方法 --- 获取完整的已安装应用列表、打开和删除应用操作、应用运行时相关信息的查看。 支持iOS10.X 注意 目前AppBrowser不支持iOS11应用查看, 由于iOS11目前还处在Beta版, 系统API还没有稳定下来。 等到Private Header更新了iOS11版本,我也会进行更新。 功能 [x] 已安装的应用列表 [x] 应用的详情界面 (打开应用,删除应用,应用的相关信息展示) [x] 应用运行时信息展示(LSApplicationProxy) [ ] 定制喜欢的字段,展示在应用详情界面 介绍 所有已安装应用列表(应用icon+应用名) 为了提供思路,这里只用伪代码,具体的私有代码调用请查看: 获取应用实例: 获取应用名和应用的icon: 应用列表界面展示: 应用列表 应用运行时详情 打开应用: 卸载应用: 获取info.plist文件: 应用运行时详情界面展示: 应用运行时详情 右上角,从左往右第一个按钮用来打开应用;第二个按钮用来卸载这个应用 INFO按钮用来解析并显示出对应的LSApplicationProxy类 树形展示LSApplicationProxy类 通过算法,将LSApplicationProxy类,转换成了字典。 转换规则是:属性名为key,属性值为value,如果value是一个可解析的类(除了NSString,NSNumber...等等)或者是个数组或字典,则继续递归解析。 并且会找到superClass的属性并解析,superClass如...
基于遗传算法辅助异构改进的动态多群粒子群优化算法(GA-HIDMSPSO)的LSTM分类预测研究(Matlab代码实现)内容概要:本文研究了一种基于遗传算法辅助异构改进的动态多群粒子群优化算法(GA-HIDMSPSO),并将其应用于LSTM神经网络的分类预测中,通过Matlab代码实现。该方法结合遗传算法的全局搜索能力与改进的多群粒子群算法的局部优化特性,提升LSTM模型在分类任务中的性能表现,尤其适用于复杂非线性系统的预测问题。文中详细阐述了算法的设计思路、优化机制及在LSTM参数优化中的具体应用,并提供了可复现的Matlab代码,属于SCI级别研究成果的复现与拓展。; 适合人群:具备一定机器学习和优化算法基础,熟悉Matlab编程,从事智能算法、时间序列预测或分类模型研究的研究生、科研人员及工程技术人员。; 使用场景及目标:①提升LSTM在分类任务中的准确性与收敛速度;②研究混合智能优化算法(如GA与PSO结合)在神经网络超参数优化中的应用;③实现高精度分类预测模型,适用于电力系统故障诊断、电池健康状态识别等领域; 阅读建议:建议读者结合Matlab代码逐步调试运行,理解GA-HIDMSPSO算法的实现细节,重点关注种群划分、异构策略设计及与LSTM的集成方式,同时可扩展至其他深度学习模型的参数优化任务中进行对比实验。
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