Explain me about the GNP call with the unqualified SSA

Suthagar · New User Joined: 01 Jul 2005 Posts: 26 Location: Chennai

Hi,

Could anyone explain me about the GNP call with the unqualified SSA?

Regards,

Suthagar.S

guptae · Posted: Thu Jun 29, 2006 5:02 pm

Gnp: Get next with in parent

Suppose my structure is

Policy basic segment is root & it have child like Policy detail segment & Policy occassional segment .

Now your pointer is on policy basic segment (pbtseg) whose key means policy number = rat1000 you want to access all the child policy detail segment(pdtlseg) of this one.

In working storage

01 ssa-pdtlseg-unqualified.
03 ssa-segment-name pic x(8) value 'pdtlseg'.
03 ssa-command-code pic x(4) value spaces.
03 filler pic x(1) value ' '.
You can make a call

Call 'CBLTDLI' function-GNP,
PCB-MASK,
IO-AREA,
ssa-pdtlseg-unqualified.

Suthagar · New User Joined: 01 Jul 2005 Posts: 26 Location: Chennai

Thanks for your immediate response Gupta.

I would like to know more abot GNP call actually.

For the base segment I had gone with the GN call and for the first child segment if I go with the GNP call with the unqualified SSA means how it will retrieve the data.

Anyone can help me out in this regard.

Regards,
Suthagar. S

gowtham_1982 · Active User Joined: 02 Dec 2005 Posts: 109

subramaniabharathi · New User Joined: 09 Mar 2006 Posts: 9

I would like to add what suthagar said
IMS basically travels in TOP - DOWN and LEFT - RIGHT format. Hence, IMS will fetch all the occurence of the child Policy detail segment and fetches all the occurences of Policy detail segment.
If you fetch the root and then give an GNP it will traverse in the above order.
But If you dont like to traverse to other immediate parent segments and you want to retreive the segements directly which is the next parent level to the root.
You could give a GNP with the required segment in the unqualified segment this will fetch the segment directly without traversing.
Remember one thing Using unqualified root you cannot specify or get the correct occurance.You will get all the occurance.As there is no such keying facility in unqualified ssa

correct me if i am wrong

Thanks
subramaniabharathi

komalnik · New User Joined: 28 May 2005 Posts: 7

Hi,

The acronym for GNP is Get next within Parent. This is usually issued with an unqualified ssa. The main reason being before issuing this we will set the Parentage by issuing either a "GN" or else an "GU" Call. Then after setting the Parentage We will issue GNP with Unqualified so that it will fetch all occurences within that Parent Only.

Now let me take a Scenario

The root being a Policy Segment and am setting the Parentage on a Particular Occurence and then I will issue a GNP Saying get me all the Occurences under this.