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Multi Row Insert & Get Diagnostics


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mistah kurtz

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PostPosted: Fri Sep 05, 2014 6:47 pm
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Hi,

My requirement is to inert the rows into a DB2 table from a sequential file which has records in millions.

For that I'm using Multi Row Insert feature with NOT ATOMIC CONTINUE ON SQLEXCEPTION option. Now I want to write all the records that failed to insert in an Error file.

For ex: If I'm doing a multi row insert for 10 rows and SQLERRD(3) of SQLCA returns 7, this means 3 records failed to insert.
How can I identify which 3 records are failed to insert and the error(SQLCODE) associated with them?

Thanks.
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Gnanas N

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PostPosted: Fri Sep 05, 2014 6:54 pm
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You may need to use GET DIAGNOSTICS.
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mistah kurtz

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PostPosted: Fri Sep 05, 2014 7:11 pm
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Thanks. Could you please provide any link or document where I can find more about GET DIAGNOSTICS feature. What are the variables and the syntax which can help me to identify the information that I need. I tried the manual, but
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Gnanas N

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PostPosted: Fri Sep 05, 2014 7:18 pm
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www-01.ibm.com/support/knowledgecenter/SSEPEK_10.0.0/com.ibm.db2z10.doc.sqlref/src/tpc/db2z_sql_getdiagnostics.dita
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Rohit Umarjikar

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PostPosted: Fri Sep 05, 2014 8:33 pm
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ibmmainframes.com/about47690.html
Should help.
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mistah kurtz

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PostPosted: Fri Sep 05, 2014 9:13 pm
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Thanks Gnanas. The link you provided looks useful. I will work on it monday now.

Quote:
If you have a array of 10 and then you are doing this in a sequential mode so certainly the 8th occurance of the same array has a probably duplicate data or a bad data.

@Rohit: I'm doing multi insert as below (WS-NUM-ROWS=10).
First I'm reading the first 10 records from file and populating the WS-CUSTOMER table and then performing an insert. If successful, read the next 10 record else find out which one failed and write them into an error file.

How would I know which one failed and for what reason(SQLCODE).

Code:
01 WS-CUSTOMER.
   05 WS-CUSTOMER-ID   PIC S9(9) COMP        OCCURS 10 TIMES.
   05 WS-CUSTOMER-NAME PIC X(50)             OCCURS 10 TIMES.

... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...
... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...
... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...

INSERT INTO CUSTOMER               
    (CUSTOMER_ID                           
   , CUSTOMER_NAME )                           
VALUES                                     
    (:WS-CUSTOMER-ID                 
   , :WS-CUSTOMER-NAME)                           
     FOR :WS-NUM-ROWS ROWS                     
     NOT ATOMIC CONTINUE ON SQLEXCEPTION


Quote:
So in your process you can check the SQLCODE <> 0 after MASS/MULTI INSERT then write that 8th one to the error file and then perform another para in a loop to simply try inserting rest of the 2 records( 9 and 10) and once it does again loan next 10 records to the array and perform your original MASS/MULTI INSERT.

I didn't understand this part at all. Could you please elaborate further.

Thanks.
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prino

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Joined: 07 Feb 2009
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PostPosted: Sat Sep 06, 2014 1:48 pm
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You don't insert millions of rows using a program, with all the overhead of logging and commit logic. There is a perfect alternative, the LOAD utility!
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mistah kurtz

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PostPosted: Sat Sep 06, 2014 6:50 pm
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Hi Robert,

The program involves lots of calculation. It's not a direct insert from the file.
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mistah kurtz

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PostPosted: Sat Sep 06, 2014 6:58 pm
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What will be the COBOL host variable for the following two columns:
Code:
DB2_ROW_NUMBER  DECIMAL(31,0)
ROW_COUNT       DECIMAL(31,0)
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mistah kurtz

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PostPosted: Sat Sep 06, 2014 7:28 pm
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I'm using PIC S9(31)V USAGE COMP-3 with ARITH(EXTEND) option.
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Bill Woodger

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Joined: 09 Mar 2011
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PostPosted: Sun Sep 07, 2014 4:19 am
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Well, you consult some DB2 doc. which tells you whether that definition is signed or not.

Yes, if you want 31 digits you'll need ARITH(EXTEND). The trailing V is unnecessary (the compiler effectively ignores it).

Why, though, would a row-id need to be able to go to 9,999,999,999,999,999,999,999,999,999,999?

That's ten (US) billion-billion-biliion-billion-billion-billion (I think, but it hardly matters), give or take one. Is that really reasonable? ARITH(EXTEND) has performance penalties if using numeric FUNCTIONs, as does the use of any packed-decimal with more than (15 I think it is) digits. 15 digits can give you a billion-billion-billion, which is often enough.
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mistah kurtz

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PostPosted: Sun Sep 07, 2014 4:54 pm
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Thanks Bill. The maximum value that this field can have is 1000. So I have removed the ARITH(EXTEND) option. Now everything is working fine including GET DIAGNOSTICS part.

Thank you all for you help.
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