Using Caché Objects - InterSystems Documentation

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Data Types • INDEXSUBSCRIPTS — If present, specifies the number of subscripts used by the property in indices, using a comma as a delimiter in the property value; the %CacheStorage class uses this number. A value of 2 specifies that the first comma piece of the property value is stored as the first subscript and the second comma piece of the property value is stored as the second subscript. • MAXLEN — Specifies the maximum number of characters the string can contain • MAXVAL — Specifies the maximum allowed logical value for the data type. • MINLEN — Specifies the minimum number of characters the string can contain. • MINVAL — Specifies the minimum allowed logical value for the data type. • ODBCDELIMITER — Specifies the delimiter character used to construct a %List value when it is projected via ODBC. • PATTERN — Specifies a pattern that the string must match. The value of PATTERN must be a valid Caché pattern-matching expression. • SCALE — Specifies the number of digits following the decimal point. • TRUNCATE — Specifies whether to truncate string to MAXLEN characters, where 1 is TRUE and 0 is FALSE. • VALUELIST — Used for enumerated (multiple-choice) properties. VALUELIST is either a null string (“”) or a delimiter-separated list (where the delimiter is the first character) of logical values. If a non-null value is present, then the property is restricted to values in the list, and the validation code simply checks to see if the value is in the list. • XSDTYPE — Declares the XSD type used when projecting XML Schemas. The supported parameters for each of the system data types are: Supported Parameters for System Data Type Classes Data Type Class %Binary Supported Parameters MAXLEN, MINLEN %Boolean %Currency %Date %Float DISPLAYLIST, FORMAT, MAXVAL, MINVAL, VALUELIST DISPLAYLIST, FORMAT, MAXVAL, MINVAL, VALUELIST DISPLAYLIST, FORMAT, MAXVAL, MINVAL, SCALE, VALUELIST, XSDTYPE 92 Using Caché Objects
Operation Data Type Class %Integer %List %Name %Numeric Supported Parameters DISPLAYLIST, FORMAT, MAXVAL, MINVAL, VALUELIST, XSDTYPE ODBCDELIMITER COLLATION, INDEXSUBSCRIPTS, MAXLEN, XSDTYPE DISPLAYLIST, FORMAT, MAXVAL, MINVAL, SCALE, VALUELIST %Status %String %Time %TimeStamp COLLATION, DISPLAYLIST, MAXLEN, MINLEN, PATTERN, TRUNCATE, VALUELIST, XSDTYPE DISPLAYLIST, FORMAT, MAXVAL, MINVAL, VALUELIST DISPLAYLIST, MAXVAL, MINVAL, VALUELIST 11.2.3 Keywords To provide interoperability with client systems, data type classes include the following class keywords: • CLIENTDATATYPE — Specifies the Java or ActiveX type used when the data type is accessed via client applications. See CLIENTDATATYPE for the default for each data type. • ODBCTYPE — Specifies the ODBC type used when the data type is accessed via ODBC. See SQL and ODBC Methods for the default for each data type. • SQLCATEGORY — Specifies the SQL Category to use for the data type when the Caché SQL engine performs operations upon it. See SQL and ODBC Methods for the default for each data type. 11.2.3.1 CLIENTDATATYPE To use Caché data with any client system (such as Java or ActiveX), the data needs to be in a form that the client system can understand. To do this, Caché provides the CLIENT- DATATYPE class keyword, which specifies format information for how Caché projects a property to the client. The table below contains a list of CLIENTDATATYPE values and which classes use them: Using Caché Objects 93
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Using Caché Objects Version 5.2 01
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Table of Contents 1 Introduction to
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7 Properties ......................
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13.1 Inheritance and SQL ..........
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20.8 %OnNew .......................
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List of Figures Embeddable Objects
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1 Introduction to Caché Objects Th
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1.2 Class Definitions and the Class
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Development Tools Caché Class Libr
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• The Caché EJB Binding—a vers
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2 Object-Oriented Database Developm
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Encapsulation Caché exploits inher
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3 The Caché Object Model The Cach
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Referring to an Object — OREF, OI
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Types of Classes 3.2.1 Transient Ob
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Types of Classes Embeddable Objects
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A class inherits all of the specifi
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2. It resolves inheritance—it det
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Caché Classes • Class Parameters
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Caché Classes ClientDataType Descr
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Caché Classes Internally, this wor
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Packages Class Packages Any of thes
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Packages Letting the compiler resol
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Packages • “%Library” —any
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Methods where count and state are d
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Methods 6.4 Method Language You hav
Page 54 and 55: Methods 6.6 Instance and Class Meth
Page 56 and 57: Methods Write dog.Speak() Which cou
Page 58 and 59: Properties 7.1 Property Keywords Yo
Page 60 and 61: Properties Property Behavior The pr
Page 62 and 63: Properties 7.5 Attribute Properties
Page 64 and 65: Properties You can manipulate a col
Page 67 and 68: 8 Class Queries Class queries provi
Page 69 and 70: Query Basics Final Specifies that s
Page 71 and 72: Caché ObjectScript. These queries
Page 73 and 74: The data in Row is the result of ex
Page 75 and 76: 9 Indices Indexes provide a mechani
Page 77 and 78: Index Collation 9.2 Index Collation
Page 79 and 80: 10 Using Objects with Caché Object
Page 81 and 82: Executing Methods 10.1.3 Executing
Page 83 and 84: Opening Objects 10.3 Opening Object
Page 85 and 86: where oref is the OREF of the speci
Page 87 and 88: For example, to populate the Home p
Page 89 and 90: change the second vaccination recor
Page 91 and 92: There are two types of array proper
Page 93 and 94: Saving Objects 10.5 Saving Objects
Page 95 and 96: mation. Again, this method deletes
Page 97 and 98: Set rset = ##class(%ResultSet).%New
Page 99: Executing Queries // Create a Resul
Page 102 and 103: Data Types 11.1 Available Types Cac
Page 106 and 107: Data Types CLIENTDATATYPE Values Va
Page 108 and 109: Data Types SQLCATEGORY Values Value
Page 110 and 111: Data Types The property is restrict
Page 112 and 113: Object Persistence 1. Its primary (
Page 114 and 115: Object Persistence Note: In a multi
Page 116 and 117: Object Persistence // Open person "
Page 118 and 119: Object Persistence For example: //
Page 120 and 121: Object Persistence If a persistent
Page 122 and 123: Object Persistence The storage clas
Page 125 and 126: 13 Objects and SQL A key aspect of
Page 127 and 128: The Object-SQL Projection 13.2 The
Page 129 and 130: The Object-SQL Projection 13.2.2.1
Page 131 and 132: The Object-SQL Projection • The p
Page 133 and 134: If the list for a particular instan
Page 135 and 136: Triggers are, however, fired by the
Page 137 and 138: 14 Relationships A relationship is
Page 139 and 140: Relationship Basics the relationshi
Page 141 and 142: An Invoice class class MyApp.Invoic
Page 143: 14.4 Persistent Behavior of Relatio
Page 146 and 147: Streams Stream data may be stored i
Page 148 and 149: Streams 15.2.2 Copying Data between
Page 150 and 151: Streams Set stream=##class(%Stream.
Page 153 and 154: 16 Class Projections Class projecti
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RemoveProjection The RemoveProjecti
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17 Object Synchronization Object sy
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About Updates • If two changes re
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About Updates Two Synchronized Data
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• classname is a quoted string th
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Set Status = TargetSyncSet.Import(f
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18 Method Generators A powerful fea
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Method Generator Context 6. It copi
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Implementing Method Generators 3. A
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The Caché Data Population Utility
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Using Callback Methods Since differ
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Using Callback Methods ReturnValue
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Using Callback Methods 20.6 %OnDele
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Using Callback Methods 20.10 %OnRol
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21 Object-Specific ObjectScript Fea
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##this Syntax >Do ##class(Package.C
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##super Syntax 21.4 ##super Syntax
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You can override a property's defau
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Dynamic Dispatch 22.2 Content of Me
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Dynamic Dispatch %DispatchMethod ca
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23 Class Definition Classes The Cac
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You can get detailed information ab
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Internet Classes addressed to , its
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Internet Classes For more informati
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Object Concurrency Setting 1 2 3 4
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Object Concurrency Note: You can us
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Using Caché Objects - InterSystems Documentation

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