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cobcurious · Beginner Joined: 04 Oct 2003 Posts: 68 Topics: 25

Hi,
Can anybody please interpret the meaning of :-
MOVE -1 TO DBKEY .
What does it mean,we can't have -1 page ..right ?
Regards
Cobcurious

kolusu · Posted: Fri Dec 19, 2003 6:27 am Post subject:

cobcurious,

It would be easier if you could provide as to which language/database you are refering.

If I had to take a guess I am assuming that moving -1 to dbkey is to start searching for positive numbers just like move low-values to search-key

Kolusu
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cobcurious · Beginner Joined: 04 Oct 2003 Posts: 68 Topics: 25

Hi Kolusu,
I am referring to this statement from IDMS.DBKEY being a numeric field,we could have moved zeros to it to represent the lowest possible values for the DBkey which physically means 0th line on the 0th page.I am not sure whether we have 0th page number or not.Pls tell me where does this -1 come from ? Why can't we move zeros instead? Does -1 indicate some special instruction ? Rolling Eyes

Regards
cobcurious

raggop · Beginner Joined: 05 Feb 2003 Posts: 19 Topics: 3

Cobcurious,
never seen move -1 to dbkey. The statements i've seen accept dbkeys into working storage from dbkey. Can you tell me what are the idms statements executed after moving -1 into dbkey.

raghu

Cogito-Ergo-Sum · Posted: Mon Dec 22, 2003 11:02 am Post subject:

Only from memory....

I remember doing this when I had to STORE a DIRECT(?) (or, was it a standalone) record, i.e. a record without CALC key or a member of a set. I think, you are moving -1 before storing.

If that is indeed the case, then, I think, the reason for doing this, is to keep the stored records as "close" as possible. I might be wrong here. (it is been over 4 months since I lost touch of IDMS). I suggest, you look into the compiler listing. That is how, I could make some progress in understanding the meaning of -1.
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vkrishna2001 · Posted: Mon Dec 22, 2003 2:02 pm Post subject:

Cogito,

What you said is right.

Cobcurious,

The following URL is for Navigational DML Programming reference manual. Refer to section 4.5.1

ftp://ftp.ca.com/pub/idms/docs/idms15/pdf/IDDMLF01.PDF

Hope this helps,
Vijayakrishna

Cogito-Ergo-Sum · Posted: Mon Dec 22, 2003 2:15 pm Post subject:

vkrishna2001,
I am??

Wow! My memory isn't as bad as I thought it was! Smile

_________________
ALL opinions are welcome.

Debugging tip:
When you have eliminated all which is impossible, then whatever remains, however improbable, must be the truth.
-- Sherlock Holmes.

cobcurious · Beginner Joined: 04 Oct 2003 Posts: 68 Topics: 25

Hi,
I thank all of you doe your help.VijayKrishna,Thank you very much for the wonderful link.
Regds
Cobcurious

vivek · Posted: Mon Jul 26, 2004 9:58 pm Post subject:

As far as I know, to store a direct locaiton mode record you move

Move -1 to Direct-dbkey. Not to DBKEY. Subschema control has two dbkey entries one just dbkey another is direct dbkey.

if you move -1 to dbkey you cannot store direct location mode records. you need to move it to direct dbkey.

moving -1 to dbkey usually initialises your currency position in a page. if you dont use it , you may get an error 12XX ( i dont remember exactly ) meaning DB KEY out of page limits.
Sorry for late response. I am a new member and just stumbled on this, thought of passing my opinion.
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Db2,IDMS

cobcurious · Beginner Joined: 04 Oct 2003 Posts: 68 Topics: 25

Hey Vivek,
Thanks for your thoughts,they were of great help of getting an insight into the funda of dbkey
Thanks
Cobcurious