Programming Guide - Actian

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How You Can Monitor a Running ApplicationFor each node, OpenROAD provides the following information about the threadit represents:Thread identifierTells you which frame began the thread (for example, main_control:1).The number after the starting frame's name indicates when, in relation toother threads, the thread began. For example, if the number is 3, thatthread is the third thread started in the application.Name of the currently active executable component of the threadDisplays the name of the current frame, procedure, or user class methodin parenthesesStatus of the threadIs displayed in the third line of the rectangle representing the threadYou can access the following options from the pop-up menu that appears whenyou right-click any thread box in the tree structure:Call StackDisplays the thread's detailed call stack.For information about using the call stack, see Call Stack Window (seepage 460).Event QueueDisplays the event queue for the thread's current frame.For information about using the event queue, see Event Queue Window(see page 462).Debugger WindowDisplays the window for the thread's current frame.For information about this window, see How You Can Use the DebuggerWindow (see page 467).Call Stack WindowEach thread in an application has a separate call stack, and you can open aCall Stack window for each thread. The call stack shows all calls to procedures,frames, and user class methods.460 <strong>Programming</strong> <strong>Guide</strong>
How You Can Monitor a Running ApplicationTo open the Call Stack window for a threadUse any of the following methods:• In the Debugger window for the thread, click Tools, Call Stack.• In the Debugger window, click the Call Stack toolbar button.• On the Thread Map portlet of the Monitor tab, right-click a thread box andselect Call Stack from the pop-up menu.The Call Stack window displays lists of frames and procedures in the order inwhich they are called, with the most recently called frame or procedure at thetop of the list.After being opened, a Call Stack window remains open until you close it oruntil the thread terminates.Note: While a thread is running, the Call Stack window is not updatedautomatically and does not always reflect the current state of the thread.However, you can always display the current state of the call stack by clickingFile, Snapshot in the Call Stack window.If a frame or procedure in the call stack was called with arguments, the nameof the frame or procedure in the Call Stack window is preceded by an icon. Youcan click the icon to see the arguments passed to the procedure or the framewhen it was called. If any of the arguments is an array or reference variable,the argument is displayed with an icon, and you can click the icon to expandthe display and see the values of the attributes.The values shown for the arguments are the values that are passed to thecalled frame or procedure from the calling frame or procedure. The call stackreflects any changes that the called frame or procedure makes to thefollowing:• Arguments of varchar data type• Attributes of any argument that is a reference variableWith the exception of varchar variables, the call stack does not reflect anychanges made by the called frame or procedure to arguments that have asimple data type. Additionally, if the called frame or procedure reassigns areference variable that it received as a parameter, any subsequent changes tothe attributes of that variable are not reflected in the call stack.Debugging Your Application 461
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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 410 and 411: 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
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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
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Gmoney • 51numeric list • 53pad
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Namesapplication • 21dynamic •
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ReadOps attributesettings • 243Re
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concat function • 54functions •
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event chains • 323event queue •
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