Programming Guide - Actian

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Table FieldsThis syntax references the Title attribute of the column's ColumnField object.Title = title_stringData type: varchar(256)Specifies a title, which can be a quoted literal or a varchar variableUse the TitleTrim attribute of the ColumnField object to access the visualattributes of the title. TitleTrim is a FreeTrim object. The syntax is:field(tablefield[*].column).TitleTrim.attribute = valueattributeSpecifies an attribute of the FreeTrim object. For example, the followingstatement changes the title of the custname column to boldface:field(custtable[*].custname).TitleTrim.IsBold = TRUE;Column FieldYou can change a variety of a column's visual characteristics. To access thesecharacteristics, use the following syntax:field(tablefield[*].column).attribute = valueattributeSpecifies an attribute of the ColumnField object. For example, the followingstatement sets the background pattern of the custname column in thecusttable table field:field(custtable[*].custname).bgpattern=FP_SHADE;Prototype FieldThe prototype field is not an actual physical area on a table field, but rather atemplate for all the fields in the column. You can access this field in the FrameEditor by choosing the first row of the table field. You can access this templatein 4GL through the ProtoField attribute of the ColumnField object. TheProtoField attribute's data type is FormField.232 <strong>Programming</strong> <strong>Guide</strong>
Table FieldsThe FormField object is high in the system class hierarchy. Most of its usefulattributes are associated with actual field objects, such as entry field or listfield, that are subclasses of the FormField object. Therefore, you must castreferences to the ProtoField attribute to the appropriate field type. The syntaxis:fieldtype(field(tablefield[*].column).ProtoField).attribute = valuefieldtypeSpecifies the class of the column's fieldsattributeSpecifies any appropriate attribute of that class.For more information about casting, see How You Can Work with Attributes(see page 140).When you change a ProtoField attribute, the change appears in all the cells inthe column. The following statement causes all of the values in the custnamecolumn (a column of entry fields in the table field custtable) to appear inboldface:entryfield(field(custtable[*].custname).protofield)isbold = TRUE;You can hide a table field column by setting the bias of its protofield toFB_INVISIBLE:entryfield(field(tf[*].name).protofield).CurBias = FB_INVISIBLE;Individual CellsYou can access some of the visual characteristics of individual cells of anunnested table field by using the CellAttribute object. This object has a varietyof attributes that control several of the visual characteristics of a cell. Notethat because the size of a cell is always identical to the size of all cells in thesame column, you cannot change any attributes that would affect the size of aCellAttribute attribute.The syntax for changing individual cell attributes is:field(tablefield[n].column).attribute = valuetablefield[n].column.attributeIdentifies a specific cell in row n of the array for the table field, andattribute is an attribute of the CellAttribute objectWorking with Arrays, Table Fields, and Collections 233
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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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Page 182 and 183: How You Can Manage TransactionsHow
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Page 188 and 189: How Programming for Multiple Sessio
Page 198 and 199: Handling Database ErrorsIn OpenROAD
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Page 216 and 217: ArraysHow You Can Add Rows to an Ar
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Page 224 and 225: ArraysAttributes used in a sort can
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Page 228 and 229: Table FieldsTable Fields and Associ
Page 230 and 231: Table FieldsThe following applicati
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Page 236 and 237: Table Field OperationsTable Field C
Page 238 and 239: Table Field OperationsHow You Can U
Page 240 and 241: Table Field OperationsWhen you use
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Page 244 and 245: Table Field OperationsThe following
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Page 248 and 249: Table Field OperationsTableField Me
Page 250 and 251: Table Field OperationsFor example,
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Page 254 and 255: CollectionsCollectionsA collection
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Page 258 and 259: Listview_Treeview_DemoImport the De
Page 260 and 261: Listview FieldsListview FieldsA lis
Page 262 and 263: Listview FieldsextensionSpecifies a
Page 264 and 265: Listview FieldsImageIndexSpecifies
Page 266 and 267: TreeNode and Tree ClassesHeaderClic
Page 268 and 269: TreeNode and Tree ClassesMaintenanc
Page 270 and 271: Treeview FieldsHow You Can Build a
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Page 274 and 275: Treeview FieldsThe tree_ex2_class h
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Page 279 and 280: How You Can Work with ImagesThe fol
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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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Dynamic Statements ConsiderationsDy
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How You Can Write an AssistantNote:
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How You Can Write an AssistantFirst
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How You Can Write an AssistantBecau
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How You Can Ensure Compatibility Be
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Chapter 17: Preprocessing Your 4GL
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PreprocessorGeneral Preprocessor St
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PreprocessorThe #define StatementTh
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Error ProcessingGuidelines for Usin
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Chapter 18: Debugging Your Applicat
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How You Can Test an ApplicationHow
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How You Can Use Break ConditionsTo
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How You Can Use Break Conditions3.
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How You Can Use Break ConditionsWay
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How You Can Use Break ConditionsSet
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How You Can Use Break Conditions•
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How You Can Use Break ConditionsMet
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How You Can Log Trace InformationDa
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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 QueriesT
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How Debugging an Application WorksS
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How Debugging an Application WorksH
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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 WorksW
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How Debugging an Application WorksL
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How Debugging an Application WorksA
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Appendix A: SQL Syntax SummaryThis
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SQL Syntax Summarygrant all [privil
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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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