Programming Guide - Actian

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How Debugging an Application WorksIn the Debugger window, you can perform the following functions to help youdebug your application:• Set and remove source breakpoints• Set watch values and open a Watch window• Customize function keys and tooltip text• Examine expressions and assign values to them• Display a thread's call stack• Display a frame's event queue• View and edit a selected script• Select trace log optionsWhen a break condition occurs and control passes to the Debugger window,the window displays the processed script of the currently active frame orprocedure. If the script is a frame script, the display includes any field scriptsassociated with the frame; the field scripts are appended to the end of theframe script.Open the Debugger for an ApplicationYou can open the Debugger from the Develop tab.To open the Debugger window1. Click the Develop tab.2. Click the application you want to debug in the Applications portlet.3. Click Run, Debug.The Debugger window appears.466 <strong>Programming</strong> <strong>Guide</strong>
How Debugging an Application WorksHow You Can Use the Debugger WindowThe title of the Debugger window has the following format:Debugging application, component:napplicationSpecifies the name of the applicationcomponentSpecifies the name of the opening frame or procedure of the threadnSpecifies the thread numberThe Debugger window has two main display areas separated by a line betweenthe areas:• If there is a current script, the processed script is displayed in the upperarea.• The lower area is for displaying data values.To change the relative size of a display area, drag the separator up or down. Ifyou resize the window, the two display areas retain their relative proportions.The text above the script display indicates what component the script belongsto, the status of the script in the thread, and the level of the script in thethread. The text has the form:Script for component name [, status in thread [, call level]]component nameSpecifies the name of the frame or procedurestatus in threadIndicates whether the component is part of the thread and whether it isthe current componentcall levelIndicates the level of the component in the thread's call stackThe script information bar also contains the following icons on the left side:ExamineLets you examine the value of an expressionAssignLets you assign a new expression to a variableDebugging Your Application 467
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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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How You Can Work with ImagesThe Col
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How You Can Work with ImagesThe Bit
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How You Can Work with Images5. Add
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How You Can Work with Text StringsD
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How You Can Work with Text StringsH
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How You Can Call 3GL ProceduresIn t
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How You Can Use Exec 4GL Statements
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How You Can Link 3GL ProceduresHow
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Sample 3GL ProceduresExec 4GL and E
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How You Can Use Data Entry Error Ha
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Chapter 12: Managing Event QueuesTh
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Event-based ProgrammingThe followin
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Event-based ProgrammingEvent TypesT
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Event-based ProgrammingField Events
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Event-based ProgrammingBecause all
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Event-based ProgrammingThe followin
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Event-based ProgrammingThe resume s
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Event-based ProgrammingNote: The da
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Communicating Between OpenROAD Fram
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How You Can Communicate with an Ext
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How You Can Communicate Between Ope
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How You Can Communicate Between Ope
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Chapter 14: Creating Dynamic Frames
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How You Can Change Field and Frame
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How You Can Create and Modify Field
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How You Can Remove Fields Dynamical
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How You Can Declare a Composite Fie
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How You Can Manipulate Data in Dyna
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How You Can Manage Operations with
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How You Can Build a Frame Dynamical
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Page 416 and 417: How You Can Build a Frame Dynamical
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Page 435 and 436: PreprocessorGeneral Preprocessor St
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Page 439 and 440: Error ProcessingGuidelines for Usin
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Page 483 and 484: Appendix A: SQL Syntax SummaryThis
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Page 487: OpenSQL Syntax SummaryOpenSQL Synta
Page 490 and 491: Operating System CommandsThe follow
Page 492 and 493: BitmapObject classThe BitmapObject
Page 494 and 495: external classAn external class def
Page 496 and 497: local variableLocal variables conta
Page 498 and 499: StringObject classThe StringObject
Page 501 and 502: Index'' ' (single quotation marks)c
Page 503 and 504: Attributesdefined • 28referencing
Page 505 and 506: using to copy data • 244using wit
Page 507 and 508: application threads • 444array di
Page 509 and 510: examining values • 473hexadecimal
Page 511 and 512: Gmoney • 51numeric list • 53pad
Page 513 and 514: Namesapplication • 21dynamic •
Page 515 and 516: ReadOps attributesettings • 243Re
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concat function • 54functions •
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event chains • 323event queue •
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