Logical parent delete rules

The following list describes what happens when a logical parent is deleted when RULES=P, RULES=L, or RULES=V is specified.

• When RULES=P is specified, the logical parent must be logically deleted before a DLET call is effective against it or any of its physical parents. Otherwise, the call results in a DX status code, and no segments are deleted. However, if a delete request is made against a segment as a result of propagation across a logical relationship, then the P rule acts like the L rule that follows.
• When RULES=L is specified, either physical or logical deletion can occur first. When the logical parent is processed by a DLET call, all logical children are logically deleted, but the logical parent remains accessible from its logical children.
• When RULES=V is specified, a logical parent is deleted along its physical path explicitly when deleted by a DLET call. All of its logical children are logically deleted, although the logical parent remains accessible from these logical children.
  A logical parent is deleted along its physical path implicitly when it is no longer involved in a logical relationship. A logical parent is no longer involved in a logical relationship when:

  • It has no logical children pointing to it (its logical child counter is zero, if it has any)
  • It points to no logical children (all of its logical child pointers are zero, if it has any)
  • It has no physical children that are also real logical children