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How to load to DB2 with column level conditions


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Chitti

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Joined: 07 Dec 2023
Posts: 2
Location: India

PostPosted: Tue Dec 12, 2023 3:44 pm
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we need to load to DB2 table with row level restrictions.

Example: I have 10 lakhs rows, I want to skip loading if PRODUCT_ID is '01234'

Is there any DB2 UTILITY commands to restrict the rows? if so please let me know the SYNTAX. If not, how to approach this problem?
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sergeyken

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Joined: 29 Apr 2008
Posts: 2022
Location: USA

PostPosted: Tue Dec 12, 2023 7:53 pm
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I would filter out the unneeded records from the input dataset using any utility at your preference (like SORT, FILEAID, any other).

Then just load the rest of data to DB2 in full.

P.S.
What is "10 lakhs rows"? I have not a minor idea...
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sergeyken

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Joined: 29 Apr 2008
Posts: 2022
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PostPosted: Tue Dec 12, 2023 9:27 pm
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Chitti wrote:
we need to load to DB2 table with row level restrictions.

Example: I have 10 lakhs rows, I want to skip loading if PRODUCT_ID is '01234'

Is there any DB2 UTILITY commands to restrict the rows? if so please let me know the SYNTAX. If not, how to approach this problem?

As a Christmas gift:
Code:
//*===========================================
//*   Filter out unneeded records
//*===========================================
//FILTER   EXEC PGM=SORT
//SYSOUT   DD  SYSOUT=*
//SYMNAMES DD  *
PRODUCT_ID,position,5,CH    <-- define the field in input data
//*
//SORTIN   DD  DISP=SHR,DSN=input.data.to.load
//SORTOUT  DD  DISP=(NEW,PASS),LIKE=input.data.to.load,
//             DSN=&&FILTERED  <-- to pass to the following LOAD step
//SYSIN    DD  *
 OMIT COND=(PRODUCT_ID,EQ,C'01234')
 SORT FIELDS=COPY
 END
//*===========================================
//*   LOAD utility step
//*===========================================
//DB2LOAD  EXEC PGM=DSNUTILB,COND=(0,NE)
// . . . . . . . . . .
//SYSREC   DD  DISP=(OLD,DELETE),DSN=&&FILTERED
// . . . . . . . . .
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Pete Wilson

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Joined: 31 Dec 2009
Posts: 580
Location: London

PostPosted: Wed Dec 13, 2023 1:52 pm
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In computing the western numbers should always be used to avoid confusion, but here's examples of the Indian counting system

5,00,000 Five lakh = 500,000

12,34,56,789 Twelve crore = 123,456,789

17,00,00,00,000 Seventeen arab = 17,000,000,000

6,78,90,00,00,00,00,000 Six padma = 6,789,000,000,000,000
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Chitti

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Joined: 07 Dec 2023
Posts: 2
Location: India

PostPosted: Wed Dec 13, 2023 3:24 pm
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Hello @sergeyken .. Thanks for your sort card and Christmas gift icon_razz.gif , I was looking more of a DB2 LOAD utility though..

Do you/ anyone have idea on this using DB2 LOAD utility card?
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Pete Wilson

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Joined: 31 Dec 2009
Posts: 580
Location: London

PostPosted: Wed Dec 13, 2023 6:06 pm
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This may help you, I'm not sure as I'm not a DBA:

www.ibm.com/docs/en/db2-for-zos/12?topic=load-loading-data-by-using-cross-loader-function

The LOAD utility can directly load the output of a dynamic SQL SELECT statement into a table. The dynamic SQL statement can be executed on data at a local server or at any remote server that complies with DRDA. This functionality is called the Db2 family cross-loader function.
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sergeyken

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Joined: 29 Apr 2008
Posts: 2022
Location: USA

PostPosted: Wed Dec 13, 2023 6:23 pm
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Chitti wrote:
Hello @sergeyken .. Thanks for your sort card and Christmas gift icon_razz.gif , I was looking more of a DB2 LOAD utility though..

Do you/ anyone have idea on this using DB2 LOAD utility card?

AFAIK the LOAD utility has no option to filter data from input SYSREC DD.

There is LOAD ... IGNORE WHEN ... option, but only in the following forms:
Quote:
WHEN - Specifies that records that do not satisfy the WHEN clause are ignored.
    - PART Specifies that records that do not satisfy any partition being loaded are ignored.
    - CONV Specifies that records that cause a conversion error are ignored.
    - VALPROC Specifies that records that fail a validation procedure are ignored.
    - IDERROR Specifies that records that have an identity column value that is out of range are ignored.
    - DUPKEY Specifies that records that cause a duplicate key error are ignored.

It seems these options are not what you need, though I did not try using any of them.
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