exchange in real time dev-06: the prodataset in openedge™ 10 john sadd progress fellow and...

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DEV-06:The ProDataSet inOpenEdge™ 10

DEV-06:The ProDataSet inOpenEdge™ 10

John SaddProgress Fellow and OpenEdge Evangelist

© 2005 Progress Software Corporation2Sim

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DEV-06: The ProDataSet in OpenEdge 10

Agenda

Distributed Data Management in Version 9 ProDataSet Overview Syntax Specifics and Demo ProDataSet Directions


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Temp-Table Parameters

Define a temp-table – Based on a database table or not

Populate the temp-table on the server– One row or many

Pass the temp-table as a parameter– One parameter for each table

Modify the temp-table on the client and pass it back


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Temp-Table Limitations

Separate table and parameter for each two-dimensional data definition

Parent-child and other relationships need multiple parameters

No standard mechanism to record changes


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SDOs and SBOs

SmartDataObjects in the ADM and Progress Dynamics® handle:– Distributed data management– Keeping track of changes– Automated update support – Standard events for validation and

business logic SmartBusinessObjects do the same for

multiple related tables


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The direction

Push valuable SDO/SBO behavior down into the 4GL

Define a core 4GL object to represent complex data relationships– One handle, one parameter

Associate validation and other business logic– Built-in events

Map directly to data objects on other platforms


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Agenda



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ProDataSet

The ProDataSet

Data-Relation1

CustomerTT

1 Lift Line Skiing2 Urpon Frisbee3 Hoops Croquet

OrderTT

6 1 01/05/9336 1 01/19/9379 1 02/10/93

Database

Customer

Lift Line SkiingUrpon FrisbeeHoops Croquet

Order

1 53 01/01/932 81 01/04/933 66 01/04/93

Event LogicDataset:Before-fillBuffer:Before-fillBefore-row-fillRow-AddRow-Delete…

Data-Source1Field Map

CustNumNameContact

Data-Source2Field Map

OrderNumCustNum

OrderDate

Query…Q1 forCustomer

Query…Q2 forOrder


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OpenEdgeBusiness Logic

PO ProDataSet

The Bigger Picture – Today and Tomorrow

Purchase Order Business Logic

HeaderData

DetailData

OtherData

PurchaseOrderProxy

.NET User Interface

Jonas Grumby

110 Desert Isle Path

Minnow, HI

OK

Cancel

C#

OpenEdge.NET Interface

ProDataSets become a driving force in OpenEdge Applications

4GL or

WebSpeed

Interface

WebClient / HTML

User InterfaceJonas Grumby

110 Desert Isle Path

Minnow, HI

OK

Cancel

OpenEdge4GL Interface

4GL

OpenEdgeWeb Services Interface


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ProDataSet to ADO.NET DataSet

ProDataSet is a Progress in-memory data store

ProDataSet maps directly to an ADO.NET DataSet, allowing you to:– Design a .NET™ interface in terms of .NET

DataSets

– Pass data back and forth to Progress AppServer™


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Agenda

Distributed Data Management in Version 9 ProDataSet Overview Syntax Specifics and Demo Futures


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A ProDataSet is made of Temp-Tables

Define temp-tables in the usual way

DEFINE TEMP-TABLE ttOrder

/* fields from Order db table */

FIELD OrderTotal AS DECIMAL

FIELD CustName LIKE Customer.Name

FIELD RepName LIKE SalesRep.RepName.

DEFINE TEMP-TABLE ttOrderLine…

DEFINE TEMP-TABLE ttItem…


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Define the DataSet

Define the DataSet in terms of the temp-tables it combines

DEFINE DATASET dsOrder FOR ttOrder, ttOline, ttItem

DATA-RELATION OrderLine FOR ttOrder, ttOline

RELATION-FIELDS (OrderNum, OrderNum)

DATA-RELATION LineItem FOR ttOline, ttItem

RELATION-FIELDS (ItemNum, ItemNum) REPOSITION.


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Data-Relations

Data-Relations define the relationship between parent-child tables

The Relation-Fields define fields in parent and child to use for selection

…DATA-RELATION OrderLine FOR ttOrder, ttOline

RELATION-FIELDS (OrderNum, OrderNum)…

Relation-Fields are used to determine how to populate the DataSet by default

They also tell Progress how to navigate the DataSet by default


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Populating with Data-Relations

When a DataSet is populated, Progress retrieves children of the current parent



ProDataSet

Data-Relation

OrderTT

6 1 01/05/9336 1 01/19/9379 1 02/10/93

OrderLineTT

6 1 000096 2 000096 3 00011

36 1 0000936 2 0000936 3 00011


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Navigating with Data-Relations

When a DataSet is navigated, Progress filters on children of the current parent



ProDataSet

Data-Relation

OrderTT

6 1 01/05/9336 1 01/19/9379 1 02/10/93

OrderLineTT

6 1 000096 2 000096 3 00011

36 1 0000936 2 0000936 3 00011


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Defining Data-Sources

You can define a Data-Source for each temp-table buffer in the DataSet

Each Data-Source can define database buffers or a query or both

Data-Source is separate from any DataSet

Database

Order OrderLine

1 53 01/01/932 81 01/04/933 66 01/04/93

Data-Source

SrcOrder

Data-Source

SrcOline

Query…Q1 forOrder

Query…Q2 forOrderLine

1 53 01/01/932 81 01/04/933 66 01/04/93

ProDataSetOrderTT

OrderLineTT


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Defining a Data-Source with a Query Define a query for a top-level table

– For example, which Order(s) to start with

– Or to define a join between buffers

DEFINE QUERY qOrder FOR Order, Customer, SalesRep.

DEFINE DATA-SOURCE srcOrder FOR QUERY qOrder Order KEYS (OrderNum), Customer KEYS (CustNum), SalesRep KEYS (SalesRep).

QUERY qOrder:QUERY-PREPARE("FOR EACH Order WHERE Order.OrderNum = " + STRING(iOrderNum) + ", FIRST Customer OF Order, FIRSTSalesRep OF Order").


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Defining a Data-Source without a Query If there’s a Data-Relation, its fields can tell Progress

how to construct a query

DEFINE DATA-SOURCE srcOline FOR OrderLine

KEYS (OrderNum).



ProDataSet

OrderLineTTData-Relation

OrderTT

6 1 01/05/9336 1 01/19/9379 1 02/10/93

6 1 000096 2 000096 3 00011


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Attaching Data-Sources

Data-Sources are defined separately from the DataSet– You can attach a particular Data-Source

without changing the DataSet definition

– Data-Sources do not travel with the DataSet

DatabaseOrder

Data-Source

SrcOrderQuery…

Q1 forOrder

1 53 01/01/932 81 01/04/933 66 01/04/93

ProDataSetOrderTT

6 1 01/05/9336 1 01/19/9379 1 02/10/93


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ATTACH-DATA-SOURCE Method Relates a Data-Source to a DataSet buffer Optional arguments:

– Field mapping for fields with different names– Except-list to skip unwanted fields, or– Include-list to include only certain fields

BUFFER ttOrder:ATTACH-DATA-SOURCE

(DATA-SOURCE srcOrder:HANDLE,

"Customer.Name,CustName").

BUFFER ttOline:ATTACH-DATA-SOURCE

(DATA-SOURCE srcOline:HANDLE).

BUFFER ttItem:ATTACH-DATA-SOURCE

(DATA-SOURCE srcItem:HANDLE).


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Populating a ProDataSet

Use the FILL method to populate the DataSet FILL on the DataSet fills every table starting

with top-level buffers FILL on a buffer fills that table and its

descendents FILL-MODE

– NO-FILL – skip this table– EMPTY – empty the table first– APPEND – add more records to the table– MERGE – add recs & eliminate dups– REPLACE – replace existing recs


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Event Callback Procedures

You can define event procedures for:– Before and After FILL of the ProDataSet– Before and After FILL of any temp-table

buffer– Before and After FILL of any record

Use ProDataSet events to prepare queries, attach Data-Sources, etc.

Use Buffer events to manipulate the table Use Record events to populate calculated

fields You can use these events when

there is no Data-Source at all


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Record-level Event Procedure

Fills a calculated OrderTotal fieldhBuff:SET-CALLBACK-PROCEDURE

("AFTER-ROW-FILL","postRecordFill",THIS-PROCEDURE).

PROCEDURE postRecordFill:

DEFINE INPUT PARAMETER DATASET FOR dsOrder.

hBuff = hDset:GET-BUFFER-HANDLE(“ttOrder”). FOR EACH OrderLine WHERE OrderLine.OrderNum = INTEGER(hBuff:BUFFER-FIELD("OrderNum"):BUFFER-VALUE): dTotal = dTotal + OrderLine.ExtendedPrice.

END. hBuff:BUFFER-FIELD("OrderTotal"):BUFFER-VALUE = dTotal. END PROCEDURE.


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ProDataSet demo…


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Passing a ProDataSet as a Parameter

You can pass a DataSet parameter as:– DATASET – static reference like TABLE for

temp-tables

– DATASET-HANDLE – dynamic reference to the DataSet and its definition, like TABLE-HANDLE for a temp-table

– HANDLE – passes a simple DataSet handle to a local procedure

Note!– Within a single session DataSet parameters

can be passed BY-REFERENCE


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Local DataSet ParameterRUN OrderDset.p ON hSession

(INPUT iOrderNum,

OUTPUT DATASET dsOrder

BY-REFERENCE).

/* OrderDset.p -- Test proc for Order Dataset */

{dsOrderTT.i}

{dsOrder.i}

DEFINE INPUT PARAMETER iOrderNum AS INTEGER.

DEFINE OUTPUT PARAMETER DATASET FOR dsOrder.

ProDataSetOrderTT

6 1 01/05/9336 1 01/19/9379 1 02/10/93


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Remote DataSet Parameter

RUN OrderDset.p ON hSession(INPUT iOrderNum, OUTPUT DATASET dsOrder

BY-REFERENCE).

/* OrderDset.p */

DEFINE OUTPUT PARAMETER

DATASET FOR dsOrder.

ProDataSetOrderTT

6 1 01/05/9336 1 01/19/9379 1 02/10/93

ProDataSetOrderTT

6 1 01/05/9336 1 01/19/9379 1 02/10/93


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Dynamic ProDataSets

Every element of a ProDataSet can be dynamic– CREATE DATASET

– ADD-BUFFER()

– ADD-RELATION() A Data-Source can also be dynamic:

– CREATE DATA-SOURCE And a DataSet can use dynamic temp-tables

– CREATE TEMP-TABLE Attributes and methods manipulate the

DataSet through its handle


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Updating Through the ProDataSet

ProDataSet tables have a companion before-image temp-table to record updates (add/change/delete)– Used to pass changes to the server to be

made in the Data-Source

– Maps to .NET support for update versions


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Before-Image Table for a DataSet

Original values for every modified record

ProDataSet

Data-Relation

OrderTT

6 1 01/05/9336 1 01/19/9379 1 02/10/93

OrderLineTT

6 1 000096 2 000106 3 00011 6 4 00077

0 0 00000 A 6 2 00009 M 6 5 00022 D

Initial values for every added record Original values for every deleted record

Before-Table


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Saving Changes To The Database

Use ATTACH-DATA-SOURCE to reattach the DataSet to the database tables for it

SAVE-ROW-CHANGES method for saving a row to the database– Uses the before-table for optimistic locking

– Allows full control in the event of a conflict ERROR, ERROR-STRING, REJECTED,

DATA-SOURCE-MODIFIED attributes


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ProDataSet update demo…


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Agenda



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Enhancements in OpenEdge 10.0B and 10.0B01

COPY-DATASET method enhancements– Also COPY-TEMP-TABLE – Behavior changed to allow copies between

non-identical tables and DataSets GET-CHANGES and MERGE-CHANGES

– include parents of modified rows FILL-MODE “REPLACE”

– Refreshes rows already in the tables– Slower than MERGE because it requires

FINDing each row as it is added to the temp-table


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Enhancements in OpenEdge 10.0B and 10.0B01 -- continued

Additional events to support data retrieval transparency– OFF-END for a ProDataSet query

– FIND-FAILED for a FIND on a buffer Extended support for data batching

– BATCH-SIZE attribute for a buffer

– LAST-BATCH attribute signals end of data

– NEXT-ROWID for repositioning a query See white paper for examples:

– psdn.progress.com/library/product_info/oera/index.ssp


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Data batching demo…


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D I S C L A I M E R

Under Development

This talk includes information about potential future products and/or product enhancements.

What I am going to say reflects our current thinking, but the information contained herein is preliminary and subject to change. Any future products we ultimately deliver may be materially different from what is described here.

D I S C L A I M E R


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ProDataSet Features in OpenEdge 10.1

Direct to-or-from XML conversion– This supports ProDataSets as parameters to

Web services Mapping from ProDataSets to Java™ SDOs REFERENCE-ONLY to use called

procedure’s ProDataSet instance– Also parameter passing BY-REFERENCE for

temp-tables


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ProDataSets address these three key OpenEdge goals

3 Strategic Elements

Process Centric Design

Business Logic

Capabilities

SOAEnabled

User Interface

Independence


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In Conclusion…

The ProDataSet is a key part of the future of 4GL applications

It is part of a focus on building complex data definitions and business logic in the 4GL

The ProDataSet is a standards-conformant object that will integrate with .NET and Web services as part of a global Service-Oriented Architecture


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Additional Resources

Expert Series book: Using ProDataSets– Now available through amazon.com!

PSDN white paper on Using Advanced ProDataSet Language Features– Part of a series on implementing the OERA

Two-day instructor-led or self-study course: Using ProDataSets

OpenEdge online documentation


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Questions?


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Thank you for your time!


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exchange in real time dev-06: the prodataset in openedge™ 10 john sadd progress fellow and...

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