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The following page has been changed by KevinWilliams: http://wiki.apache.org/ws/Tuscany/TuscanyJava/DAS_Java_Overview/RDBDAS_Java_User_Guide/Change_History_Processing ------------------------------------------------------------------------------ The second half of the example makes modification to a single object in the graph and then calls the applyChanges() method. As part of the applyChanges processing, the das will scan the SDO !ChangeSummary and notice the modified !DataObject. It will then generate the UPDATE statement required to reflect the change to the database: {{{ - UPDATE CUSTOMER SET LASTNAME = 'Pavick' WHERE ID = 1; + UPDATE CUSTOMER SET LASTNAME = 'Pavick' WHERE ID = 1 }}} + Notice that only a single column is updated rahther than all columns. This is because the SDO !ChangeSummary has enough fidelity toe track changes on a property-by-property bases and the das has the ability to generate partial updates. + + When the das has completed its processing of the !ChangeSummary all generated statements are executed against the database. In this trivial example there is only a single statement to execute. However, if there is more than a single statement to execute -- possibly several INSERT/UPDATE and DELETE statements -- then the das will sort the set of statements accordng to its write operation ordering algorithm. + --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
