What does trigger old contains?

What does trigger old contains?

For an INSERT trigger, OLD contains no values, and NEW contains the new values. For an UPDATE trigger, OLD contains the old values, and NEW contains the new values. For a DELETE trigger, OLD contains the old values, and NEW contains no values.

What is the difference between trigger newMap and trigger Oldmap?

newMap returns a new map of records with id and trigger. oldMap returns an old map of records with id.

What is new and old in MySQL trigger?

Within the trigger body, the OLD and NEW keywords enable you to access columns in the rows affected by a trigger. OLD and NEW are MySQL extensions to triggers; they are not case-sensitive. In an INSERT trigger, only NEW. col_name can be used; there is no old row.

How to compare Old and new values in a trigger?

Note that Trigger.oldMap is just one of the special Trigger context variables available to you! Next post: Sending emails using Apex! Why did you create 2 boolean variables and compared them, instead of directly comparing the fields from trigger.new and trigger.oldmap like this:

When to compare Old and new version of record?

So we need to compare value of that field between old version of record and new version of record to make sure that trigger will not run every time when record is changed/edited. For example, we may have requirement that send an email to VP of company or do some task when an opportunity status is changed to Closed Won.

Where do I find trigger.oldmap in Salesforce?

Salesforce provides Trigger.OldMap where records with older version (last version of record committed in database) are stored in map with key as their Salesforce record Id’s. Trigger.OldMap = Map ();

Is the apex trigger the same as the old trigger?

Here is a slick little way to do this without having to worry about if Salesforce decided to correctly order your trigger.old in the same way that trigger.new is. Here is the APEX Trigger: