Validating data types
The member ‘rc’ (or return code) is used to communicate back if the validation was successful or not.
As I mentioned before, information is passed to the validation function in the event object, and in the code we see that the member ‘value’ is used to communicate the current value of the field.Adobe provided a lot of infrastructure to do that with just a simple script.Let’s take a look at how to do that with a text field that is only supposed to have a value of either ‘AAAA’ or ‘BBBB’ (yes, I know that this does not make much sense in a real PDF form).So, if the user enters ‘01234’ we should see an error message that would instruct the user about what type of data is valid for this field.To start, we create a text field and bring up the properties dialog for the field.UTC is roughly equivalent to the Greenwich Mean Time standard (or GMT) which refers to the mean solar time at the Royal Observatory in Greenwich, London.
Collectively, these standards define a global time standard that can be used to convert a given time to local time, and vice versa.
Parameterized commands can also improve query execution performance, because they help the database server accurately match the incoming command with a proper cached query plan.
For more information, see Execution Plan Caching and Reuse and Parameters and Execution Plan Reuse in SQL Server Books Online.
This syntax is customized to a specific data source, as described in the following table. This implicit conversion will fail if the string is larger than the maximum size of an NVar Char, which is 4000 characters.
a bit of time-sensitive data, so it's important that you understand how to work with the built-in date and time types provided in ABAP.
This topic walks through several examples that explain the programming model.