Programming Guide - Actian

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Chapter 13: Inter-Frame CommunicationTechniquesThis section contains the following topics:Communicating Between OpenROAD Frames (see page 333)How You Can Communicate with an External Program Using External UserEvents (see page 347)How You Can Communicate Between OpenROAD Applications Using DatabaseEvents (see page 357)This chapter discusses communication between frames, which involves:• Communication between OpenROAD frames using the Terminate method,global variables, and user events• Communicating with an external program using external user events, suchas:– Registering the external user event– The user event block– Sending the external user event to OpenROAD• Communicating between OpenROAD applications using database events,such as:– The DBEventObject– Database events and multiple sessions– Creating, registering, and raising database events– Purging database events• The external user event sampleCommunicating Between OpenROAD FramesOpenROAD provides the following three techniques for communicating betweenframes:• The Terminate method• Global variables• The user eventInter-Frame Communication Techniques 333
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Ingres OpenROAD ® 2006Programming
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ContentsChapter 1: Introduction 13I
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Using an Object-oriented Approach t
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How You Can Retrieve Array Informat
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Chapter 12: Managing Event Queues 3
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Chapter 17: Preprocessing Your 4GL
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Chapter 1: IntroductionThis section
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ConventionsConventionsThe following
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Your Support OptionsYour Support Op
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OpenROAD NamesThe rules for these n
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OpenROAD Names3. Enclosing field sc
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OpenROAD NamesThe following code ex
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VariablesThe following illustrates
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VariablesIn the first example, film
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VariablesOpenROAD checks references
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VariablesHow You Can Declare Dynami
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VariablesFor example, assume that y
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ExpressionsHowever, you cannot use
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ExpressionsThe general syntax for h
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ExpressionsCurSessionSpecifies, for
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ExpressionsString OperatorThe conca
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ExpressionsOperatorlikenot likeOper
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Expressions• You can use the esca
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ExpressionsBecause procedures can r
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System-defined FunctionsThis rule h
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System-defined FunctionsNameOperand
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System-defined FunctionsName Operan
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System-defined FunctionsNameshift(c
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System-defined FunctionsSome date f
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System-defined FunctionsThe followi
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System-defined FunctionsCount Funct
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System-defined FunctionsResult Data
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Chapter 3: Writing Scripts and Proc
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ScriptsDeclare local variables that
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ScriptsUserEventSpecifies a user ev
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ScriptsExample—Field and Menu Ite
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ProceduresOpenROAD lets you create
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ProceduresReturning from a Procedur
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ProceduresExample—Local Procedure
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Procedures4GL DataTypedatemoneyfloa
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Calling Procedures• In this call
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Calling ProceduresparameterAssigns
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How Procedure Handles Work (ProcHan
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Compiler LimitationsYou can avoid t
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How You Can Invoke FramesHow the Cu
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How You Can Invoke FramesHow You Ca
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How You Can Invoke FramesFor more i
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How You Can Invoke FramesFor exampl
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How You Can Invoke FramesIf the obj
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How You Can Invoke FramesHow You Ca
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How You Can Invoke Frames• Prompt
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How You Can Invoke FramesThe syntax
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How You Can Run Non-interactive App
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How You Can Reference ObjectsHow Yo
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How You Can Reference ObjectsHow Yo
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How You Can Reference ObjectsUse an
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Using an Object-oriented Approach t
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InheritanceClass RelationshipsYou c
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InheritanceYou can specify a user c
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InheritanceThe Terminate method is
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How You Can Create a User ClassWhen
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How You Can Create a User ClassHow
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How You Can Create a User Class3. G
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How You Can Create a User ClassTo e
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External ClassesHow You Can Use Ext
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External ClassesExample—ActiveX C
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How You Can Manipulate Objects Gene
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Overview of the OpenROAD System Cla
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How You Can Access a Database with
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How You Can Manage TransactionsHow
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How You Can Manage TransactionsDivi
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How You Can Manage TransactionsTo c
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How Programming for Multiple Sessio
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Handling Database ErrorsIn OpenROAD
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Handling Database ErrorsIf a databa
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Handling Database ErrorsFor example
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Handling Database Errorsbeginerr_no
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Arrays and Table Fields—Conceptua
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ArraysBecause an individual attribu
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ArraysDeclaring an array variable d
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ArraysThe following statement puts
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Arraysfor i = custtable.FirstRow to
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ArraysHow You Can Add Rows to an Ar
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ArraysThe inserted row is blank bec
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ArraysThe following code fragment i
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ArraysThese attributes are:AllRowsR
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ArraysAttributes used in a sort can
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ArraysThe format parameter can be a
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Table FieldsTable Fields and Associ
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Table FieldsThe following applicati
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Table FieldsThis syntax references
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Table FieldsFor example, the follow
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Table Field OperationsTable Field C
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Table Field OperationsHow You Can U
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Table Field OperationsWhen you use
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Table Field OperationsBiases can be
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Table Field OperationsThe following
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Table Field OperationsHow You Can T
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Table Field OperationsTableField Me
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Table Field OperationsFor example,
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Table Field OperationsControlling M
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CollectionsCollectionsA collection
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Collections// Open a workbook and p
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Listview_Treeview_DemoImport the De
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Listview FieldsListview FieldsA lis
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Listview FieldsextensionSpecifies a
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Listview FieldsImageIndexSpecifies
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TreeNode and Tree ClassesHeaderClic
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TreeNode and Tree ClassesMaintenanc
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Treeview FieldsHow You Can Build a
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Treeview FieldsThe second window is
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Treeview FieldsThe tree_ex2_class h
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Chapter 9: Working with Images and
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How You Can Work with ImagesThe fol
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Page 287 and 288: How You Can Work with Text StringsD
Page 289 and 290: How You Can Work with Text StringsH
Page 291 and 292: How You Can Work with Text StringsH
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Page 296 and 297: How You Can Call 3GL ProceduresIn t
Page 298 and 299: How You Can Use Exec 4GL Statements
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Page 319 and 320: Event-based ProgrammingThe followin
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Page 323 and 324: Event-based ProgrammingField Events
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Page 331: Event-based ProgrammingNote: The da
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Page 364 and 365: Conceptual BackgroundConceptual Bac
Page 366 and 367: How You Can Change Field and Frame
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How You Can Manipulate Data in Dyna
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Chapter 15: Creating a Frame at Run
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How You Can Build a Frame Dynamical
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Chapter 16: Writing a Template Assi
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How You Can Write an Assistantbatch
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How You Can Write an AssistantThe f
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How You Can Ensure Compatibility Be
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PreprocessorInclude ScriptsInclude
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PreprocessorFor frames that may hav
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PreprocessorThe #undef StatementThe
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Error ProcessingIf the compiler dis
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Start and Stop the Debugger• Debu
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How Running in the Debugger Environ
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How You Can Use Break ConditionsWhe
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How You Can Use Break ConditionsHow
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How You Can Use Break ConditionsDel
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How You Can Use Break ConditionsFor
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How You Can Use Break Conditions5.
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How You Can Log Trace InformationSe
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How You Can Log Trace InformationTr
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How You Can Monitor a Running Appli
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How You Can Monitor a Running Appli
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How You Can Debug Database QueriesH
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How Debugging an Application WorksI
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How Debugging an Application WorksW
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How Debugging an Application WorksH
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How Debugging an Application WorksS
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How Debugging an Application Works
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How Debugging an Application WorksA
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Debug an Imaged Application with th
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SQL Syntax SummarySQL Syntax Summar
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SQL Syntax SummaryKnowledge Managem
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Appendix B: Operating System Differ
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Glossary3GL procedureA 3GL procedur
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dereferencing colonA dereferencing
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global 4GL procedureglobal variable
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procedureprocedure handle (ProcHand
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user class scriptA user class scrip
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Aglobal • 76passing parameters
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field appearance at runtime • 365
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permissions required to register ev
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handling errors in inquire_4GL stat
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FrameExec system classBlocksFrames
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for QueryObjects • 200for StringO
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Performanceand database procedures
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SetValue event • 341WaitForm meth
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TableHeader attribute • 231Tables
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