View source for Documentation:OCLOperators changePoints

'''See:''' [[Documentation:Versioned on class|Versioned_on_class]]

{{Edited|July|12|2025}}<code>changePoints</code> is used when '''Versioning''' is enabled on the class.

It retrieves the '''historical versions''' of an object based on a timestamp range.

MDriven records a “change point” every time a versioned object is modified.The<code>changePoints(start, stop)</code> operator returns all stored versions between the timestamps

Syntax
 self.changePoints(startTime, stopTime)

* '''startTime''' – integer timestamp (UTC ticks) where the search begins
* '''stopTime''' – integer timestamp where the search ends

* Use '''-1''' for <code>stopTime</code> to mean “until the end of recorded history”

Example
 Customer.allInstances->first.changePoints(0, -1)
This returns every recorded version of the first Customer from the beginning of time to the latest version.
[[Category:Intermediate-Friendly]]
[[Category:OCL (Object Constraint Language)]]
[[Category:OCL Operators: Date & Time]]
[[Category:Priority 60]]
[[Category:EAL (Executable Action Language)]]
[[Category:Utilities]]