Programming Guide - Actian

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PreprocessorThe #undef StatementThe #undef statement is used to undefine macro variables. It has the followingsyntax:# undef $variable$variableSpecifies the name of the macro variable you want to undefine. You canspecify only one variable in each #undef statement.You cannot undefine a built-in macro variable. If you use #undef for a macrovariable that does not currently exist, the statement is ignored and processingcontinues.The #if - #endif StatementThe #if statement can be used to conditionally include or exclude lines ofsource code at compile time and to test if a condition is TRUE. It has thefollowing syntax:# if (bool_expr) [then]...# else...# endifbool_exprSpecifies an integer or character expression that evaluates to TRUE (1) orFALSE(0).If the expression is TRUE, then any code between the #if and #else isprocessed and any code between the #else and #endif is ignored. If thetested condition is FALSE, then any lines between the test and an #else, orthe test and the #endif (if the #else is omitted) are ignored. Thepreprocessor removes all of the following statements from the file that arepassed to the compiler:#if 0/* shared procedures */#include nameproc#endif438 Programming Guide
Error ProcessingGuidelines for Using the #if – #endif StatementThe following syntax rules apply to the #if statement:• Arguments are not permitted in #if statements.• The statement:# if $variable then ...is equivalent to:# if($variable0)then ...• The #if statement can be nested within other #if, #ifdef, and #ifndefstatements up to a depth of 20.The #ifdef – #endif StatementThe #ifdef statement can be used to test whether a name has been defined asa macro variable by #define. The syntax for this statement is:#ifdef $variable...#else...#endifThe #ifdef statement is TRUE when the macro variable has been defined.The #ifndef - #endif StatementThe #ifndef statement can be used to test whether a name has not beendefined as a macro variable by #define. The syntax for this statement is:#ifndef $variable...#else...#endifThe #ifndef statement is TRUE if the macro variable has not been defined.Error ProcessingWhen the preprocessor encounters an error, it stops and displays the errorswith your source code. It displays your source code with all preprocessorstatements up to the point where the preprocessor statement that caused theerror appears.Preprocessing Your 4GL Code 439
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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 Manipulate Data in Dyna
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Page 418 and 419: Dynamic Statements ConsiderationsDy
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Page 422 and 423: How You Can Write an AssistantFirst
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Page 426 and 427: How You Can Ensure Compatibility Be
Page 433 and 434: Chapter 17: Preprocessing Your 4GL
Page 435 and 436: PreprocessorGeneral Preprocessor St
Page 437: PreprocessorThe #define StatementTh
Page 441 and 442: Chapter 18: Debugging Your Applicat
Page 443 and 444: How You Can Test an ApplicationHow
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Page 453 and 454: How You Can Use Break Conditions•
Page 455 and 456: How You Can Use Break ConditionsMet
Page 457 and 458: How You Can Log Trace InformationDa
Page 459 and 460: How You Can Monitor a Running Appli
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Page 463 and 464: How You Can Debug Database QueriesT
Page 465 and 466: How Debugging an Application WorksS
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Page 481 and 482: How Debugging an Application WorksA
Page 483 and 484: Appendix A: SQL Syntax SummaryThis
Page 485 and 486: SQL Syntax Summarygrant all [privil
Page 487: OpenSQL Syntax SummaryOpenSQL Synta
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Operating System CommandsThe follow
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BitmapObject classThe BitmapObject
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external classAn external class def
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local variableLocal variables conta
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StringObject classThe StringObject
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Index'' ' (single quotation marks)c
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Attributesdefined • 28referencing
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using to copy data • 244using wit
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application threads • 444array di
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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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