ProvideXData Dictionary & Views System

Presented by:Patrizio Lucci

Presentation Overview

Data Dictionary Maintenance Enhancements

Data Dictionary Object Suite

Views System Enhancements

Data Dictionary Maintenance Enhancements

• Data Dictionary Merge Utility

• Zlib Compression Type

• Signed Integer Key Segment Support

Data Dictionary Maintenance Enhancements Data Dictionary Merge Utility• Available in three forms• An interactive utility in Data Dictionary Maintenance• Object method of the *dict/database and *dict/pvxdb object

Merge (SourceDDF$, SourceTable$, DestinationDDF$, MergeOption$)

Merge (SourceDDF$, DestinationDDF$, MergeOption$)Merge (SourceChannel, SourceTable$, DestinationChannel, MergeOption$)Merge (SourceChannel, DestinationChannel, MergeOption$)

• A callable program

CALL “*dict/merge;Merge_Tables”,SourceDDF$,SourceTable$,DestinationDDF$,MergeOption$

CALL “*dict/merge;Merge”,SourceChannel,SourceTable$,DestinationChannel,MergeOption$

All methods and call properties are fully documented in the new ProvideX Data Dictionary Manual

All methods and call properties are fully documented in the new ProvideX Data Dictionary Manual

Data Dictionary Maintenance Enhancements Data Dictionary Merge Utility

Information is organized by data group.

Information about the currently selected item

Replace Contents

Data Dictionary Maintenance Enhancements Data Dictionary Merge Utility

Merge Contents

Data Dictionary Maintenance Enhancements Data Dictionary Merge Utility

Skip

Data Dictionary Maintenance Enhancements Data Dictionary Merge Utility

Data Dictionary Maintenance Enhancements Zlib Compression• ZLib Compression is for VLR and EFF files only• Systems must be capable of dynamically loading the

ZLib DLL (Windows) or shared library object (UNIX) in order to create physical files that are Zlib Compressed

• New TCB(195) will return 1 if ZLib support is available

Data Dictionary Maintenance Enhancements Signed Integer Key Segment Support• Now signed integers will be sorted correctly• Solution is flipping the high order bit (Sign bit) on all signed

integers in the key segment, which results in the following sort sequence:

0x80000000 Largest negative # becomes 0x00000000 (Lowest key)

... ...0xFFFFFFFE negative 2 becomes

0x7FFFFFE0xFFFFFFFF negative 1 becomes 0x7FFFFFF0x000000000 zero

becomes 0x800000000x000000001 one

becomes 0x800000010x000000002 two

becomes 0x80000002... ...0x7FFFFFFF highest positive # becomes

0xFFFFFFFF (Highest key)

Data Dictionary Object SuiteConsists of 3 Main Objects

DataBase• Creating and maintaining Dictionary information

(providex.ddf and providex.dde)• Basically provides the same functionality as Data

Dictionary Maintenance interfacePVXdb

• Creating and maintaining embedded dictionary of your physical file

ODBsql, OCIsql or DB2sql• New for Version 7• Creating and maintaining relational Data Base

information (SqlServer, MySql, Access, Oracle and DB2)

All methods and properties are fully documented in the new ProvideX Data Dictionary Manual

All methods and properties are fully documented in the new ProvideX Data Dictionary Manual

Control ObjectsControl Objects

Entity Objects

Data Dictionary Object Suite

Views Enhancements

• New Wizard Look

• SQL Database Support

• Logic Procedures

• Free-Form Filters

• Import/Export Utilities

• Object Interface for Creating Views

• New ways to accessing View Data

• Views Deployment

New Wizard Look for Data Source Maintenance

• Allows for a quicker setup• Forces user to follow a proper procedural protocol for

creating data sources

Go to first panel

Previous sequential panel

Go to last panel

Next sequential panel

Views Enhancements

SQL Database Support

• Enables connection to ODBC (Sql Server, MySql, Access),OCI, and DB2 at the client and/or server side

• Allows for other connection options, such as PSWD=,USER=, etc. • Multiple options must be separated by a semi-colon

• Sort• Any Column• Case

• Case sensitive• Use upper case• Use lower case

Views Enhancements

• Ascending or Descending sequence

Indicates the DSN name Drop box selection of valid database types (ODBC, OCI and DB2 Local or Server)

Display the defined primary key

Supports all OPEN parameters for connecting via ODBC, OCI and DB2 as specified in the ProvideX Language Reference Manual

Once connected this drop box will contain a list of available tables

SQL Database SupportViews Enhancements

Drop down list of all columns in table.

Specifying case

SQL Database SupportViews Enhancements

This drop down list offers a choice of Ascending or Descending

Views EnhancementsLogic Procedures

• Enable you to specify logic to be performed at various levels.

• You have a overall Initialization, Execution and Close Logic points.

• Within the Data Source and Views Maintenance you can add Initialization and Close Logic points.

1. General Initialization - when initially entering the Views system. 2. General Execution - prior to retrieving/displaying data. 3. View Initialization - when a View is opened via ’open( ) method. 4. Data Source Initialization - when a data source handler is established. 5. Data Source Close - when a data source handler is dropped. 6. View Close - when a View is closed via ’close( ) method. 7. General Close - prior to exiting the Views system.

Execution Order

Views EnhancementsLogic Procedures

Access General Logic Procedures

Views EnhancementsLogic Procedures

General Initialization logic when initially entering the Views system

General Execution logic prior to retrieving/displaying data.

Object Logic to perform these procedures using the methods OnLoad( ), OnClose( ), and OnExecute( )

General Close logic executed prior to exiting the Views system

Views EnhancementsLogic Procedures

Data Source Initialization logic executed when a data source handler is established

Data Source Close logic executed when a data source handler is dropped

Object Logic to perform these procedures using the methods OnLoad( ), OnClose( )

Views EnhancementsLogic Procedures

Views EnhancementsLogic Procedures

Access Logic Procedures

View Initialization logic executed when a View is opened via ’open( ) method

View Close - when a View is closed via ’close( ) method

Object Logic to perform these procedures using the methods OnLoad( ), OnClose( )

Views EnhancementsFree-Form Filter

• Expression must evaluate to a zero/non-zero result• Zero value would result in a record being excluded• Non-zero result would cause a record to be

included in the data set.• One free-form filter is allowed per View• Maximum expression length is 500 characters• Filter expression may consist of references to any

of the data elements in the View

List of columns to assist in building the free-form filter

Views EnhancementsFree-Form Filter

Views EnhancementsImport/Export

• These utilities allow you to merge from one set of View definition files (pvxview.*) into another

• Exported Views definitions are stored as formatted text files

• Export file options• Purge contents before export (default)• Append to pre-existing export file

• Import utility has a easy to understand tree view with state indicators to deal with duplicate sources

Information is organized by data group.

Information about the currently selected item

Export path and purge options

Views EnhancementsImport/Export

Information is organized by data group.

Information about the currently selected item

Views EnhancementsImport/Export

Views EnhancementsObject Interface for Creating Views• Provides same functionality programmatically, as the

interactive Data Source Maintenance and View Maintenance• ViewCtl object delegates functionality to subordinate objects to

deal with Views, Data Source and Data Group definitions• These subordinate objects delegate functionality to deal with

Views items, data source items, and relationships ObjID = NEW ("*views/viewctl [,ViewsDirectory$], ERR=stmtref)

All methods and properties are fully documented in the Views Version 7 Manual

All methods and properties are fully documented in the Views Version 7 Manual

Views EnhancementsNew Ways to Access View Data • You can now programmatically alter a view

definition before the data is retrieved• This is all possible because you can now pass an

object identifier to the View object VCtl=NEW("*views/viewctl",err=DoErr)

VCtl'RemoveItem(Vu,"cls_desc")

Vu=VCtl'Load("View: Customer")

View=NEW("*views/view",VCtl) View'open(Vu)

VCtl

View

View: Customer

VCtl

ProvideX Developer

Views DeploymentClient would like to add

OrderDate to this view.

I will export the view and ftp the text file to the

client site.

Clients System

Web Site with Views

Now I just need to Import this

view in.

Views Enhancements

THANK YOU!

End of Presentation