Updating Predicate

Wed, 03/04/2009 - 20:02 |  hdanzl

Testing if a trigger event is UPDATE.


Syntax

<updating predicate> ::= UPDATING


Notes

♦ The UPDATING predicate can only be specified in the body of a trigger definition to check the trigger event.
♦ The predicate evaluates to TRUE if the trigger was activated by an UPDATE operation on the table, else to FALSE.


Examples

1) The following example shows how the UPDATE predicate is used in the WHEN clause of a triggered action:

       WHEN ( UPDATING )

       triggered SQL statements

2) The following example shows how the UPDATE predicate is used in a triggered SQL statement:

       IF UPDATING THEN ... END IF;


Conformance

NexusDB extensions

-

UPDATING predicate
‹ Inserting PredicateupDeleting Predicate ›
Print this chapter |  Login or register to post comments |  Send to friend |  PDF version |  metadata Tags:
Home | Site Contents | Documentation | NexusDB Manual V3 | SQL Reference | Predicates

Powered by Drupal and Drupal Theme created with Artisteer.