Thanks, Doug. And to all the others who clued me in. I didn't have access to any docs for DBFIND to confirm my earlier thinking (which turned out to be incorrect).
Thanks to Doug and Leonard B. for the DBDRIVER info.
/pat
>>> Doug Werth <[log in to unmask]> 04/26/01 03:48PM >>>
Pat,
That is exactly what the chain length parameter does for you on a DBFIND.
Status words 5&6 contain the number of entries on the chain. Here is an
example using DBDRIVER.
:dbdriver
DBDRIVER C.05.00 THU, APR 26, 2001, 3:38 PM (C) HEWLETT-PACKARD 1978
<< OPEN the database >>
Command: !b=music
Command: !m=1
Command: !q=;
Command: o
Elapsed time (MS) = 452 CPU = 208
Baseid=%000001 Class=64 Current DBG size=32767 DBU size=12288
<< DBFIND for search item value octal 161 (dec 113) >>
<< Call is successful and there is one entry on the chain >>
Command: !s=log
Command: !q=selections
Command: !i=ALBUMCODE
Command: !q=SELECTIONS
Command: !m=1
Command: !a=%161
Command: f
Elapsed time (MS) = 2 CPU = 1
Command: ?s
0000 0000 0000 0000 0000 0001 0000 0001 0000 0001
<< chain length = 1 ^^^^^^^^^ >>
<< Now try against another dataset. The find will succeed >>
<< but the chain length is zero >>
Command: !q=LOG
Command: f
Elapsed time (MS) = 9 CPU = 9
Command: ?s
0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
<< chain length = 0 ^^^^^^^^^ >>
HTH.
Doug.
Doug Werth Beechglen Development Inc.
[log in to unmask] Cincinnati, Ohio
----- Original Message -----
From: "Pat Shugart" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, April 26, 2001 2:56 PM
Subject: [HP3000-L] IMAGE,COBOL:Determining path information
Hello all,
I need to determine in a DBFIND (not DBGET) if an entry exists in a specific
dataset for a key value. I hope I can make my explanation clear enough...
For example:
Dataset A (DETAIL)
PATHNAME = KEY
VALUE = "HI MOM"
Dataset B (DETAIL)
PATHNAME = KEY
VALUE = "HI MOM"
or
The value may not exist at all in B while it exists in A
Both use the same auto-master.
I'm reading in a file and trying to determine if a duplicate record
condition would occur if I were to do a DBPUT. I'm thinking that DBFIND only
interogates the master entry and its chain length and not specific to the
dataset. Is that correct? We tried doing a DBFIND and a DBGET, but it broke
something else in the program and we're trying to do as little work as
possible (isn't that always the case?)
TIA for any thoughts,
..................................................................
t?t .?.* t?t .?.* t?t .?.* t?t
..................................................................
Pat Shugart
Trinity Information Services
Farmington Hills, MI 48331
248.489.6123
248.488.9195 (fax)
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