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Comment: Migrated to Confluence 5.3

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The RDB DAS leverages the SDO ChangeSummary to drive graph chages changes to a database. Here is a simple example:

Panel

DAS das = DAS.FACTORY.createDAS(getConnection());
Command select = das.createCommand("Select * from CUSTOMER where ID = 1");
DataObject root = select.executeQuery();unmigrated-wiki-markup

DataObject customer = (DataObject) root.get("CUSTOMER\[1\]");
customer.set("LASTNAME", "Pavick");
das.applyChanges(root);

The first half of this example creates a new read command and executes it. The result is a graph of DataObjects (in this case just one) represented by the containing "root".

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Notice that only a single column is updated rahther than all columns. This is because the SDO ChangeSummary has enough fidelity to track changes on a property-by-property bases and the das has the ability to generate partial updates.
last edited 2006-10-12 03:01:47 by KevinWilliams