Using Globals

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Using Globals

Contents

InterSystems: The power behind what matters

Preface :	About This Book

Chapter 1:	Introduction
	1.1 Features 1.2 Examples 1.3 Use in Applications
Chapter 2:	Global Structure
	2.1 Logical Structure of Globals 2.1.1 Global Naming Conventions and Limits 2.1.2 Introduction to Global Nodes and Subscripts 2.1.3 Global Subscripts 2.1.4 Global Nodes 2.1.5 Collation of Globals 2.2 Maximum Length of a Global Reference 2.3 Physical Structure of Globals 2.4 Referencing Globals 2.4.1 Setting Global Mappings 2.4.2 Extended Global References
Chapter 3:	Using Multidimensional Storage (Globals)
	3.1 Storing Data in Globals 3.1.1 Creating Globals 3.1.2 Storing Data in Global Nodes 3.1.3 Storing Structured Data in Global Nodes 3.2 Deleting Global Nodes 3.3 Testing the Existence of a Global Node 3.4 Retrieving the Value of a Global Node 3.4.1 The $GET Function 3.4.2 The WRITE, ZWRITE, and ZZDUMP Commands 3.5 Traversing Data within a Global 3.5.1 The $ORDER (Next / Previous) Function 3.5.2 Looping Over a Global 3.5.3 The $QUERY Function 3.6 Copying Data within Globals 3.7 Maintaining Shared Counters within Globals 3.8 Sorting Data within Globals 3.8.1 Collation of Global Nodes 3.8.2 Numeric and String-Valued Subscripts 3.8.3 The $SORTBEGIN and $SORTEND Functions 3.9 Using Indirection with Globals 3.10 Managing Transactions 3.10.1 Locks and Transactions 3.10.2 Nested Calls to TSTART 3.11 Managing Concurrency 3.12 Checking the Most Recent Global Reference 3.12.1 Naked Global Reference
Chapter 4:	SQL and Object Use of Multidimensional Storage
	4.1 Data 4.1.1 Default Structure 4.1.2 IDKEY 4.1.3 Subclasses 4.1.4 Parent-Child Relationships 4.1.5 Embedded Objects 4.1.6 Streams 4.2 Indices 4.2.1 Storage Structure of Standard Indices 4.3 Bitmap Indices 4.3.1 Logical Operation of Bitmap Indices 4.3.2 Storage Structure of Bitmap Indices 4.3.3 Direct Access of Bitmap Indices
Chapter 5:	Managing Globals
	5.1 General Advice 5.2 Introduction to the Globals Page 5.3 Viewing Global Data 5.4 Editing Globals 5.5 Finding Values in Globals 5.5.1 Performing Wholesale Replacements 5.6 Exporting Globals 5.7 Importing Globals 5.8 Deleting Globals 5.9 APIs for Management Tasks
Appendix A:	Temporary Globals and the IRISTEMP Database
	A.1 Defining a Mapping for Temporary Globals A.2 System Use of IRISTEMP