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ap_mainframes
Active User
Joined: 29 Dec 2005
Posts: 181
Location: Canada
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Hello,
I have got a table with say field A.
I need to search this table on field A, and if there are duplicates in column A, then I need to generate an error.
I am not sure, what the most efficient logic would.
Can someone pls advise ?
Thanks |
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dick scherrer
Moderator Emeritus
Joined: 23 Nov 2006
Posts: 19244
Location: Inside the Matrix
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Hello,
You need to post the definition of the table and explain how it is loaded.
If this is in a program, it should be a simple matter to check for duplicates while loading the table. |
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ap_mainframes
Active User
Joined: 29 Dec 2005
Posts: 181
Location: Canada
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Hello,
The table looks like this
| Code: |
WT-003-TABLE
OCCURS 10 TIMES
INDEXED BY WTX-003-A.
20 WT-003-A PIC X(009). |
This is loaded in the program. |
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dick scherrer
Moderator Emeritus
Joined: 23 Nov 2006
Posts: 19244
Location: Inside the Matrix
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Hello,
Then each time a new value is being loaded into the table, look at the already loaded values and generate the error when a duplicate is encountered. |
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CICS Guy
Senior Member
Joined: 18 Jul 2007
Posts: 2146
Location: At my coffee table
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| ap_mainframes wrote: |
I have got a table with say field A.
I need to search this table on field A, and if there are duplicates in column A, then I need to generate an error. |
Normally, that is done while LOADing the table....
| Quote: |
I am not sure, what the most efficient logic would.
Can someone pls advise ? |
Yes, but just what is the question???? |
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Terry Heinze
JCL Moderator
Joined: 14 Jul 2008
Posts: 1249
Location: Richfield, MN, USA
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| Since your table does not have an ascending or descending key, your best bet is to sort the table entries prior to loading them then compare current and previous entries while loading as already stated. You could also use a memory sort after the load which will make your "search for duplicates" much easier. Looking for duplicates in an unsorted table is tedious. |
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ap_mainframes
Active User
Joined: 29 Dec 2005
Posts: 181
Location: Canada
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| All, Thanks for the replies. I am now checking for duplicates while loading it. |
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dick scherrer
Moderator Emeritus
Joined: 23 Nov 2006
Posts: 19244
Location: Inside the Matrix
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You're welcome - Thank you for the follow-up 
d |
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