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Produktbild: Sqlscript For Sap Hana

Sqlscript For Sap Hana

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Beschreibung

Produktdetails

Verkaufsrang

42624

Einband

Gebundene Ausgabe

Erscheinungsdatum

31.08.2021

Verlag

Rheinwerk Publishing

Seitenzahl

409

Maße (L/B/H)

26/18,3/3,1 cm

Gewicht

1026 g

Auflage

2nd Enlarged edition

Sprache

Englisch

ISBN

978-1-4932-2139-4

Beschreibung

Produktdetails

Verkaufsrang

42624

Einband

Gebundene Ausgabe

Erscheinungsdatum

31.08.2021

Verlag

Rheinwerk Publishing

Seitenzahl

409

Maße (L/B/H)

26/18,3/3,1 cm

Gewicht

1026 g

Auflage

2nd Enlarged edition

Sprache

Englisch

ISBN

978-1-4932-2139-4

Herstelleradresse

Libri GmbH
Europaallee 1
36244 Bad Hersfeld
DE

Email: gpsr@libri.de

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  • Produktbild: Sqlscript For Sap Hana
  • · ... Introduction ... 15

    · ... Structure of the Book ... 18

    · ... Acknowledgments ... 20

    · 1 ... SAP HANA ... 21

    · 1.1 ... What Is SAP HANA? ... 22

    · 1.1.1 ... SAP HANA: A Fast SQL Database ... 22

    · 1.1.2 ... SAP HANA: An Application Server ... 26

    · 1.1.3 ... SAP HANA: A Collection of Tools ... 27

    · 1.2 ... System Architecture ... 29

    · 1.2.1 ... SAP HANA Server Components ... 29

    · 1.2.2 ... Databases and Tenants ... 30

    · 1.3 ... Organizing Database Objects ... 32

    · 1.3.1 ... Database Schemas ... 32

    · 1.3.2 ... Database Catalogs ... 34

    · 1.3.3 ... Content and Repositories ... 35

    · 1.4 ... Development Environments ... 36

    · 1.4.1 ... SAP HANA Studio ... 37

    · 1.4.2 ... SAP HANA Database Explorer ... 40

    · 1.5 ... The SQL Console ... 44

    · 1.6 ... Summary ... 47

    · 2 ... Getting Started with SQLScript ... 49

    · 2.1 ... SQL versus SQLScript ... 49

    · 2.2 ... Basic Language Elements ... 53

    · 2.2.1 ... Statements ... 53

    · 2.2.2 ... Whitespace ... 54

    · 2.2.3 ... Comments ... 54

    · 2.2.4 ... Literals ... 56

    · 2.2.5 ... Identifiers ... 58

    · 2.2.6 ... Access to Local Variables and Parameters ... 59

    · 2.2.7 ... System Variables ... 60

    · 2.2.8 ... Reserved Words ... 61

    · 2.2.9 ... Operators ... 61

    · 2.2.10 ... Expressions ... 63

    · 2.2.11 ... Predicates ... 65

    · 2.2.12 ... Data Types ... 66

    · 2.2.13 ... The NULL Value ... 67

    · 2.2.14 ... The DUMMY Table ... 69

    · 2.3 ... Modularization and Logical Containers ... 70

    · 2.3.1 ... Blocks ... 72

    · 2.3.2 ... Procedures ... 75

    · 2.3.3 ... User-Defined Functions ... 83

    · 2.3.4 ... User-Defined Libraries ... 87

    · 2.4 ... Sample Program ... 89

    · 2.4.1 ... Requirements ... 89

    · 2.4.2 ... Requirements Analysis ... 90

    · 2.4.3 ... Implementation ... 91

    · 2.4.4 ... Testing the Implementation ... 97

    · 2.5 ... Summary ... 100

    · 3 ... Declarative Programming in SQLScript ... 101

    · 3.1 ... Table Variables ... 102

    · 3.1.1 ... Declaring Table Variables ... 102

    · 3.1.2 ... Using Table Variables ... 103

    · 3.2 ... SELECT Statements ... 104

    · 3.2.1 ... SELECT Clauses ... 105

    · 3.2.2 ... Field List of SELECT Clauses ... 105

    · 3.2.3 ... FROM Clauses ... 119

    · 3.2.4 ... Joins ... 122

    · 3.2.5 ... WHERE Conditions ... 130

    · 3.2.6 ... WITH Clauses ... 137

    · 3.2.7 ... GROUP BY Clauses ... 139

    · 3.2.8 ... HAVING Clauses ... 141

    · 3.2.9 ... ORDER BY Clauses ... 142

    · 3.2.10 ... Set Theory ... 143

    · 3.2.11 ... Subqueries ... 145

    · 3.2.12 ... Alias Names ... 146

    · 3.3 ... Other Operators ... 148

    · 3.3.1 ... Calculation Engine Plan Operators ... 148

    · 3.3.2 ... MAP_MERGE Operator ... 149

    · 3.3.3 ... MAP_REDUCE Operator ... 150

    · 3.4 ... Summary ... 151

    · 4 ... Data Types and Their Processing ... 153

    · 4.1 ... Character Strings ... 153

    · 4.1.1 ... Data Types for Character Strings ... 154

    · 4.1.2 ... Conversions ... 157

    · 4.1.3 ... Character String Functions ... 157

    · 4.1.4 ... SQLSCRIPT_STRING Library ... 171

    · 4.2 ... Date and Time ... 176

    · 4.2.1 ... Date Information ... 176

    · 4.2.2 ... Time Information ... 181

    · 4.2.3 ... Combined Time and Date Information ... 182

    · 4.2.4 ... Processing Time and Date Values ... 182

    · 4.2.5 ... Examples of Processing Time Values ... 187

    · 4.3 ... Numerical Data ... 189

    · 4.3.1 ... Basic Arithmetic Operations ... 191

    · 4.3.2 ... Square Roots and Exponents ... 191

    · 4.3.3 ... Logarithms ... 192

    · 4.3.4 ... Rounding or Trimming ... 192

    · 4.3.5 ... Trigonometry ... 194

    · 4.3.6 ... Random Numbers ... 194

    · 4.3.7 ... Sign ... 194

    · 4.3.8 ... Quantities and Amounts ... 195

    · 4.4 ... Binary Data Types ... 200

    · 4.4.1 ... Conversion between Binary Data, Hexadecimal Data, and Character Strings ... 201

    · 4.4.2 ... Bits and Bytes ... 202

    · 4.5 ... Conversions between Data Types ... 204

    · 4.6 ... Summary ... 205

    · 5 ... Write Access to the Database ... 207

    · 5.1 ... INSERT ... 208

    · 5.1.1 ... Individual Data Records ... 208

    · 5.1.2 ... Inserting Multiple Records Simultaneously ... 209

    · 5.2 ... UPDATE ... 211

    · 5.2.1 ... Simple UPDATE Statement ... 211

    · 5.2.2 ... UPDATE Statement with Reference to Other Tables ... 212

    · 5.3 ... UPSERT or REPLACE ... 213

    · 5.3.1 ... Inserting or Updating Individual Data Records ... 213

    · 5.3.2 ... Inserting or Updating Multiple Data Records ... 214

    · 5.4 ... MERGE INTO ... 214

    · 5.5 ... DELETE ... 217

    · 5.6 ... TRUNCATE TABLE ... 217

    · 5.7 ... Summary ... 217

    · 6 ... Imperative Programming ... 219

    · 6.1 ... Variables ... 219

    · 6.1.1 ... Local Scalar Variables ... 219

    · 6.1.2 ... Local Table Variables ... 224

    · 6.1.3 ... Session Variables ... 234

    · 6.1.4 ... Temporary Tables ... 235

    · 6.2 ... Flow Control Using IF and ELSE ... 236

    · 6.3 ... Loops ... 239

    · 6.3.1 ... FOR Loop ... 239

    · 6.3.2 ... WHILE Loop ... 240

    · 6.3.3 ... Controlling Loop Passes ... 241

    · 6.3.4 ... Exercise: Greatest Common Divisor ... 242

    · 6.4 ... Cursors ... 243

    · 6.4.1 ... FOR Loop via a Cursor ... 243

    · 6.4.2 ... Open, Read, and Close Explicitly ... 244

    · 6.4.3 ... Updateable Cursors ... 246

    · 6.5 ... Arrays ... 246

    · 6.5.1 ... Generating an Array ... 247

    · 6.5.2 ... Accessing the Array ... 247

    · 6.5.3 ... Arrays as Local Variables ... 248

    · 6.5.4 ... Splitting and Concatenating Arrays ... 249

    · 6.5.5 ... Arrays and Table Columns ... 250

    · 6.5.6 ... Bubble Sort Exercise ... 251

    · 6.6 ... Transaction Control ... 253

    · 6.6.1 ... Transactions ... 253

    · 6.6.2 ... Autonomous Transactions ... 254

    · 6.7 ... Executing Dynamic SQL ... 255

    · 6.7.1 ... Parameters of Dynamic SQL ... 257

    · 6.7.2 ... Input Parameters ... 258

    · 6.8 ... Error Handling ... 260

    · 6.8.1 ... What Are Exceptions? ... 261

    · 6.8.2 ... Triggering Exceptions ... 262

    · 6.8.3 ... Catching Exceptions ... 262

    · 6.9 ... Summary ... 266

    · 7 ... Creating, Deleting, and Editing Database Objects ... 267

    · 7.1 ... Tables ... 268

    · 7.1.1 ... Creating Database Tables ... 268

    · 7.1.2 ... Changing Database Tables ... 272

    · 7.1.3 ... Deleting Database Tables ... 273

    · 7.2 ... Table Types ... 273

    · 7.3 ... Views ... 274

    · 7.4 ... Sequences ... 276

    · 7.4.1 ... Increment ... 277

    · 7.4.2 ... Limits ... 277

    · 7.4.3 ... Behavior When Reaching the Limit ... 277

    · 7.4.4 ... Resetting the Sequence ... 278

    · 7.4.5 ... Changing and Deleting a Sequence ... 278

    · 7.5 ... Triggers ... 278

    · 7.5.1 ... Parameters ... 280

    · 7.5.2 ... Per Row or Per Statement ... 281

    · 7.6 ... Summary ... 281

    · 8 ... SQLScript in ABAP Programs ... 283

    · 8.1 ... AMDP Procedures ... 283

    · 8.1.1 ... Introduction to AMDP ... 284

    · 8.1.2 ... Creating AMDP Procedures ... 287

    · 8.1.3 ... Generated Objects of an AMDP Method ... 290

    · 8.1.4 ... Lifecycle of the Generated Objects ... 294

    · 8.1.5 ... Two-Track Development ... 294

    · 8.1.6 ... Using AMDP Procedures in Other AMDP Procedures ... 297

    · 8.2 ... CDS Table Functions ... 300

    · 8.2.1 ... Creating a CDS Table Function ... 300

    · 8.2.2 ... Generated Objects of a CDS Table Function ... 305

    · 8.2.3 ... Implicit Client Handling of CDS Table Functions ... 306

    · 8.3 ... AMDP Functions for AMDP Methods ... 307

    · 8.3.1 ... AMDP Table Functions ... 307

    · 8.3.2 ... Scalar AMDP Functions ... 309

    · 8.4 ... Alternatives to AMDP for Calling SQLScript Code from ABAP Programs ... 310

    · 8.5 ... Recommendations ... 311

    · 8.6 ... Summary ... 312

    · 9 ... SQLScript in SAP Business Warehouse ... 313

    · 9.1 ... Executing the Data Transfer Process in ABAP vs. SAP HANA ... 314

    · 9.2 ... Transformation Routines as AMDP ... 318

    · 9.2.1 ... Creating Transformation Routines in Eclipse ... 318

    · 9.2.2 ... Creating Transformation Routines in SAP GUI ... 319

    · 9.3 ... Successive Transformations and Mixed Execution ... 320

    · 9.4 ... Generated AMDP Classes ... 321

    · 9.4.1 ... Signature of AMDP Methods ... 323

    · 9.4.2 ... Assigning the Output Tables ... 325

    · 9.4.3 ... Access to Data from Other Data Models ... 325

    · 9.5 ... Individual Routines ... 328

    · 9.5.1 ... Start Routines ... 329

    · 9.5.2 ... End Routines ... 329

    · 9.5.3 ... Expert Routines ... 330

    · 9.5.4 ... Field Routines ... 332

    · 9.6 ... Error Processing and Error Stack ... 333

    · 9.6.1 ... Processing Flow in the Data Transfer Process ... 335

    · 9.6.2 ... Example: Recognizing Incorrect Data in Table OUTTAB ... 336

    · 9.6.3 ... Example: Finding Invalid Field Contents with Regular Expressions ... 337

    · 9.7 ... Summary ... 337

    · 10 ... Clean SQLScript Code ... 339

    · 10.1 ... Code Readability ... 339

    · 10.1.1 ... Formatting the Code ... 340

    · 10.1.2 ... Mnemonic Names ... 341

    · 10.1.3 ... Granularity of Procedures and Functions ... 342

    · 10.1.4 ... Comments ... 345

    · 10.1.5 ... Decomposing Complex Queries ... 347

    · 10.1.6 ... Readable SQLScript Statements ... 351

    · 10.2 ... Performance Recommendations ... 352

    · 10.2.1 ... Reducing Data Volumes ... 353

    · 10.2.2 ... Avoid Switching between Row and Column Engines ... 353

    · 10.2.3 ... Declarative Queries ... 353

    · 10.2.4 ... Scalar Functions ... 353

    · 10.3 ... Summary ... 354

    · 11 ... Tests, Errors, and Performance Analysis ... 355

    · 11.1 ... Testing SQLScript Code ... 356

    · 11.1.1 ... SQL Console ... 356

    · 11.1.2 ... Testing ABAP-Managed Database Procedure Methods ... 358

    · 11.1.3 ... SQLSCRIPT_LOGGING Library ... 359

    · 11.1.4 ... End-User Test Framework in SQLScript ... 361

    · 11.2 ... Debugger for SQLScript ... 365

    · 11.2.1 ... SQLScript Debugger in SAP HANA Studio ... 366

    · 11.2.2 ... ABAP-Managed Database Procedure Debugger in the ABAP Development Tools ... 369

    · 11.2.3 ... Debugging in the SAP HANA Database Explorer ... 372

    · 11.3 ... Performance Analysis ... 374

    · 11.3.1 ... Runtime Measurement ... 374

    · 11.3.2 ... Execution Plan ... 375

    · 11.3.3 ... Plan Visualizer ... 377

    · 11.3.4 ... SQL Analyzer of the SAP HANA Database Explorer ... 384

    · 11.3.5 ... SQLScript Code Analyzer ... 386

    · 11.4 ... Summary ... 390

    · ... Appendices ... 391

    · A ... Data Model for Task Management ... 393

    · A.1 ... Overview of the Tables ... 393

    · A.2 ... Data ... 394

    · A.3 ... Installation ... 395

    · B ... List of Abbreviations ... 397

    · C ... The Author ... 399

    · ... Index ... 401