Using Caché Objects - InterSystems Documentation

13.1 Inheritance and SQL .......................................................................................... 113
13.1.1 How a Class is Projected to SQL ............................................................. 114
13.1.2 Naming Rules for Projected Classes ........................................................ 114
13.2 The Object-SQL Projection ............................................................................... 115
13.2.1 Identity (OIDs Projected to SQL) ............................................................ 115
13.2.2 Properties .................................................................................................. 116
13.2.3 Methods .................................................................................................... 122
13.2.4 SQL Triggers ............................................................................................ 122
13.2.5 Relationships ............................................................................................ 123
14 Relationships .............................................................................................................. 125
14.1 Relationship Basics ............................................................................................ 126
14.1.1 Relationship Keywords ............................................................................. 126
14.1.2 Defining a Relationship ............................................................................ 127
14.2 Dependent Relationships ................................................................................... 128
14.3 In-Memory Behavior of Relationships .............................................................. 129
14.4 Persistent Behavior of Relationships ................................................................. 131
14.4.1 Referential Integrity .................................................................................. 131
14.4.2 Persistent Behavior of Dependent Relationships ..................................... 131
15 Streams ....................................................................................................................... 133
15.1 Declaring Stream Properties .............................................................................. 133
15.1.1 Projecting Streams to ODBC ................................................................... 134
15.2 Using the Stream Interface ................................................................................. 134
15.2.1 Reading and Writing Stream Data ............................................................ 135
15.2.2 Copying Data between Streams ................................................................ 136
15.2.3 Inserting Stream Data ............................................................................... 136
15.2.4 Using Streams in Object Applications ...................................................... 137
15.3 Using Streams with SQL ................................................................................... 137
15.4 Streams and Visual Basic ................................................................................... 139
16 Class Projections ........................................................................................................ 141
16.1 Projection Definitions ........................................................................................ 141
16.1.1 Adding a Projection to a Class ................................................................. 141
16.2 Projection Classes .............................................................................................. 142
16.2.1 The Projection Interface ........................................................................... 142
16.2.2 The Standard Projection Classes .............................................................. 143
16.2.3 Creating a New Projection Class .............................................................. 144
Using Caché Objects
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