Updating nested table
DECLARE -- A locally defined varray initialized with no elements.l_one_day_of_meals meals_vat := meals_vat ( ); BEGIN -- Make room for the three meals. EXTEND ( 3 ); -- Add breakfast, using the constructor for both the meal -- and within it the food object type instance.
However, by using the control, you can enable a Web page to participate in partial-page updates without writing any client script.l_one_day_of_meals meals_vat := meals_vat ( ); -- A local object type -- instance for breakfast l_breakfast food_t := food_t ( 'Scrambled Eggs', 'Protein', 'Yellow' ); BEGIN l_one_day_of_meals.EXTEND; l_one_day_of_meals ( 1 ) := meal_t ( 4, 'BREAKFAST', l_breakfast ); END; / I show the name of the food served for breakfast using dot notation (specifying object.attribute, just as I would specify a table's column with table.column) to get to the attribute of the element in the varray: The food_served attribute is, however, very different from number_served.When partial-page updates are enabled, controls can asynchronously post to the server.An asynchronous postback behaves like a regular postback in that the resulting server page executes the complete page and control life cycle.Let's suppose that you want to see the type of meal served for each row in the nested table.
You are not only able to query data from these nested tables but you can also change the information in a nested table by using the UPDATE statement.
This should have extremely high performance, but won't address syncing any data that has changed, such as an updated phone # for a client.
I have a PHP script that is going through the DB, getting a list of tables, then can run the above query for each table, doing so requires no knowledge of the table structure.
If you want, you can add custom client script to enhance the client user experience.
When you use an server control and the client Page Request Manager class.
l_one_day_of_meals meals_nt := meals_nt ( ); BEGIN -- Make room for the three meals. EXTEND ( 3 ); -- Add breakfast, using the constructor for both the meal -- and within it the food object type instance. But you don't want to simply display all that data.