About Page Processing
Page processing is the process of submitting a page. A page is typically submitted when a user clicks a button. Use the Page Processing section of the Page Definition to specify application logic such as computations, validations, processes, and branches. In general, the Application Express engine runs this logic in the order it appears on the Page Definition.
Description of the illustration page_processing.gif
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Topics:
Computations
Computations are units of logic used to assign session state to items and are executed at the time the page is processed.
Validations
Validations enable you to create logic controls to verify whether user input is valid. For example, a validation can check whether or not a value has been entered into a mandatory field.
Processes
Processes are logic controls used to execute data manipulation language (DML) or PL/SQL. Processes are executed after the page is submitted.
