ProvideX Data Dictionary & Views System

1. ProvideXData Dictionary & Views System Presented by: Patrizio Lucci

2. Presentation Overview • Data Dictionary Maintenance Enhancements • Data Dictionary Object Suite • Views System Enhancements

3. Data Dictionary Maintenance Enhancements • Data Dictionary Merge Utility • Zlib Compression Type • Signed Integer Key Segment Support

4. 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

5. Data Dictionary Maintenance Enhancements Data Dictionary Merge Utility Information about the currently selected item Information is organized by data group.

6. Data Dictionary Maintenance Enhancements Data Dictionary Merge Utility Replace Contents

7. Data Dictionary Maintenance Enhancements Data Dictionary Merge Utility Merge Contents

8. Data Dictionary Maintenance Enhancements Data Dictionary Merge Utility Skip

9. 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

10. 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 0x7FFFFFE 0xFFFFFFFF negative 1 becomes 0x7FFFFFF 0x000000000 zero becomes 0x80000000 0x000000001 one becomes 0x80000001 0x000000002 two becomes 0x80000002 ... ... 0x7FFFFFFF highest positive # becomes 0xFFFFFFFF (Highest key)

11. Data Dictionary Object Suite Consists of 3 Main Objects DataBase • Creating and maintaining Dictionary information (providex.ddf and providex.dde) • Basically provides the same functionality as Data Dictionary Maintenance interface PVXdb • 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

12. Data Dictionary Object Suite Entity Objects Control Objects Control Objects

13. 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

14. Views Enhancements 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 Go to last panel Previous sequential panel Next sequential panel

15. 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 • Ascending or Descending sequence

16. Views Enhancements SQL Database Support Indicates the DSN name Drop box selection of valid database types (ODBC, OCI and DB2 Local or Server) Once connected this drop box will contain a list of available tables Display the defined primary key Supports all OPEN parameters for connecting via ODBC, OCI and DB2 as specified in the ProvideX Language Reference Manual

17. Views Enhancements SQL Database Support Specifying case Drop down list of all columns in table. This drop down list offers a choice of Ascending or Descending

18. Views Enhancements Logic 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.

19. Views Enhancements Logic Procedures Execution Order 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.

20. Views Enhancements Logic Procedures Access General Logic Procedures

21. Views Enhancements Logic Procedures General Execution logic prior to retrieving/displaying data. General Initialization logic when initially entering the Views system General Close logic executed prior to exiting the Views system Object Logic to perform these procedures using the methods OnLoad( ), OnClose( ), and OnExecute( )

22. Views Enhancements Data Source Close logic executed when a data source handler is dropped Logic Procedures Data Source Initialization logic executed when a data source handler is established Object Logic to perform these procedures using the methods OnLoad( ), OnClose( )

23. Views Enhancements View Close - when a View is closed via ’close( ) method Logic Procedures View Initialization logic executed when a View is opened via ’open( ) method Object Logic to perform these procedures using the methods OnLoad( ), OnClose( ) Access Logic Procedures

24. Views Enhancements Free-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

25. Views Enhancements Free-Form Filter List of columns to assist in building the free-form filter

26. Views Enhancements Import/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

27. Views Enhancements Information about the currently selected item Import/Export Information is organized by data group. Export path and purge options

28. Views Enhancements Information about the currently selected item Import/Export Information is organized by data group.

29. Views Enhancements Object 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

30. Views Enhancements New 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) Vu=VCtl'Load("View: Customer") VCtl'RemoveItem(Vu,"cls_desc") View=NEW("*views/view",VCtl) View'open(Vu) VCtl View: Customer View VCtl

31. Views Enhancements Client would like to add OrderDate to this view. I will export the view and ftp the text file to the client site. Now I just need to Import this view in. Views Deployment ProvideX Developer Web Site with Views Clients System

32. THANK YOU! End of Presentation