User`s guide

Storing and Retrieving Test Results Chapter 5
VEE User’s Guide 237
Customizing a Simple Test Database
You can search and sort a DataSet for information, such as test
name, time stamps, test parameters, test values, pass or fail
indicators, and test descriptions. Therefore, DataSet records
can act as a test database. To search for information, you can
use the From Data Set object as follows:
• The expression field in the From Data Set object is used for
search operations.
• The function sort() can be used to sort records using a
specified field.
Lab 5-6: Using Search and Sort Operations with DataSets
In this exercise, you will learn how to search a DataSet for
information, create an operator interface for the search
operation, and program a sort operation.
Performing a Search Operation With DataSets
1 Open the dataset1.vee program.
2 Double- click on the expression field at the bottom of the
From Data Set object to highlight the current expression, 1.
Enter Rec.B>=0.5. The object will now output all records,
where field B (the random number in our code) is greater or
equal to 0.5.
3 Add an EOF pin that will fire if no records match the
criterion in the expression field. Place the cursor over the
data output area of the From Data Set object, and press
Ctrl-A. An EOF output pin is added to the From Data Set
object, as shown in
Figure 141.
4 Run the program and save it as dataset2.vee.
NOTE
To add an EOF pin, you could also open the object menu, and click Add
Term in al ⇒ Data Output....