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nitinmanipal
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Joined: 16 May 2008
Posts: 6
Location: bangalore
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Hi,
Our IMS database looks like this.
Parent(IMS root)
CHild1
child 2
child 3
all child 1,2,3 are child segment of parent segment.
1. Now our PSB has definition for parent and child 3.We are not concerned about child 1 and child 2 in our program.
2. Child 3 has two fields X and Y. We need to update field Y using our program.
Problem :
1. How to get hold of Child 3?
2. How to update field Y in child 3?.
We need sample programs or explanation over phone/mail would help. |
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kalukakkad
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Joined: 10 Mar 2005
Posts: 81
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I hope you have the key field value for the parent and the child-3 segment.
CALL 'CBLTDLI' USING WS-GHU
PCB-1
IO-AREA
SSA-PARENT
SSA-CHILD-3
WS-GHU PIC X(08) VALUE 'GHU '.
SSA-PARENT = PARENT(KEYFLD=XXXXX)
SSA-CHILD-3=CHILD3(KEYFLD=YYYYY)
IO-AREA = LAYOUT FOR SEGMENT - CHILD 3
MOVE 'UPDATE VALUE' TO Y(Chuild-3) Variable
CALL 'CBLTDLI' USING WS-REPL
PCB-1
IO-AREA
WS-REPL PIC X(08) VALUE 'REPL '. |
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nitinmanipal
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Joined: 16 May 2008
Posts: 6
Location: bangalore
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| kalukakkad wrote: |
I hope you have the key field value for the parent and the child-3 segment.
CALL 'CBLTDLI' USING WS-GHU
PCB-1
IO-AREA
SSA-PARENT
SSA-CHILD-3
WS-GHU PIC X(08) VALUE 'GHU '.
SSA-PARENT = PARENT(KEYFLD=XXXXX)
SSA-CHILD-3=CHILD3(KEYFLD=YYYYY)
IO-AREA = LAYOUT FOR SEGMENT - CHILD 3
MOVE 'UPDATE VALUE' TO Y(Chuild-3) Variable
CALL 'CBLTDLI' USING WS-REPL
PCB-1
IO-AREA
WS-REPL PIC X(08) VALUE 'REPL '. |
hi,
thanks i just want to know. when we access child 3 then is it neccessary that PARENT-SSA should be qualified.
Can both PARENT-SSA and CHILD-SSA be unqualified.
Thanks,
Nitin |
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kalukakkad
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Joined: 10 Mar 2005
Posts: 81
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Nitin,
yes, both of the SSA's can be unqualified, but then you have to make sure that the segment you are accessing is the correct one.
e.g.
CALL 'CBLTDLI' USING WS-GN
PCB-1
IO-AREA
SSA-PARENT
SSA-CHILD-3
WS-GHU PIC X(08) VALUE 'GN '.
SSA-PARENT = PARENT
SSA-CHILD-3=CHILD3
IO-AREA = LAYOUT FOR SEGMENT - CHILD 3
Now, you can issue the 'GN' call in a loop until status code 'GB' (end of DB) or 'GA'.
With each 'GA' it will move to next parent segment. |
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nitinmanipal
New User
Joined: 16 May 2008
Posts: 6
Location: bangalore
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| kalukakkad wrote: |
Nitin,
yes, both of the SSA's can be unqualified, but then you have to make sure that the segment you are accessing is the correct one.
e.g.
CALL 'CBLTDLI' USING WS-GN
PCB-1
IO-AREA
SSA-PARENT
SSA-CHILD-3
WS-GHU PIC X(08) VALUE 'GN '.
SSA-PARENT = PARENT
SSA-CHILD-3=CHILD3
IO-AREA = LAYOUT FOR SEGMENT - CHILD 3
Now, you can issue the 'GN' call in a loop until status code 'GB' (end of DB) or 'GA'.
With each 'GA' it will move to next parent segment. |
hi,
Thanks. in my case i am not concern about parent segment insrtances.
i just want to access child-3 instances.
so after establising parentage to PARENT(root) segment. can i use GNP call to access all the occerances of CHILD3.
Thanks,
Nitin |
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kalukakkad
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Joined: 10 Mar 2005
Posts: 81
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| yes, you can access all child3 segments under a parent that way. |
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Sandy Zimmer
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Joined: 13 Jun 2007
Posts: 826
Location: Wilmington, DE
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The way that has always worked best for me is:
You have the parent by whatever means - qualified or unqualified SSA.
Now qualify the parent SSA - don't forget to load in the key for that segment. You need not set parentage!
Set up a loop to retrieve all child 3 segments until you get GB or GE.
You will GHN using the qualified SSA for the parent and and unqualifed SSA for the child 3 segment.
If you have a sucessful retrieval on your GHN, then issue your REPL. As with all database calls, check your status to make sure you were successful. |
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nitinmanipal
New User
Joined: 16 May 2008
Posts: 6
Location: bangalore
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| Sandy Zimmer wrote: |
The way that has always worked best for me is:
You have the parent by whatever means - qualified or unqualified SSA.
Now qualify the parent SSA - don't forget to load in the key for that segment. You need not set parentage!
Set up a loop to retrieve all child 3 segments until you get GB or GE.
You will GHN using the qualified SSA for the parent and and unqualifed SSA for the child 3 segment.
If you have a sucessful retrieval on your GHN, then issue your REPL. As with all database calls, check your status to make sure you were successful. |
Thanks all for ur comments |
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