Use of Sequence in Match-Merge

Dear All,
I have a source table containing name and address data. I want to do householding, which means I need to split the data using a match-merge operator. The address data is the merged output, and the name data is the cross-reference output. All well and good so far.
I want eventually to load the outputs into two levels of a Customer dimension (although for testing right now, I'm just using two ordinary target tables). I know that I will need a 'business key' to link the merged and the cross-reference outputs (as the two dimensional levels). I decide that I shall create a column in both outputs called HH_SEQ, and load this Household Sequence number from a Sequence (which I prepared earlier).
In Merge Rules, for the Attribute HH_SEQ, I use a Rule Type of Sequence, and select the appropriate Sequence from the drop-down list box. I map this attribute in the MERGE outgroup to the appropriate column in the target merged table, and MM_HH_SEQ in the XREF outgroup to the appropriate column in the target cross-reference table.
Here is the issue: to get HH_SEQ to be available as a potential Output Attribute in either Merge Output or Cross-Reference Output, it must first be present as a Source Attribute. Which means I had to add it to Input Attributes first. But of course it is not on my input source table! And thus I get a "VLD-1000 Input parameter INGRP1.HH_SEQ does not have input" warning.
Either I'm just not understanding how to use the Sequence rule type properly (the documentation is pretty atrocious, mind), or there is some technique required here that is just not apparent from several days of experimentation.
All help gratefully received!
Regards,
Donna
p.s. it does actually compile and run just fine!

Hi Donna
I think you are using it in the correct way! I've seen other examples like this from the MM creators.
The warning can be ignored, I think it is there to highlight a potential issue if it was being used for a scenario other than what you are doing.
Cheers
David

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Hi all,
I just created a testtable and a sequence to use as a primary key column value for that table.
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create or replace
TRIGGER Bef_Ins_On_Testtable
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Edited by: user9371286 on 31.Tem.2010 04:15
Edited by: user9371286 on 31.Tem.2010 04:21
Edited by: user9371286 on 31.Tem.2010 04:27

Please post your trigger code and your database version ( the result of: select * from v$version; ).
Put it between tags, so your example will stay formatted.
(see: http://forums.oracle.com/forums/help.jspa for more examples regarding tags)
"PLS-00357: Table,View Or Sequence reference "string" not allowed in this context
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+http://download.oracle.com/docs/cd/B19306_01/server.102/b14219/plsus.htm#sthref13592+
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http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14251/adfns_triggers.htm#ABC1032282

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Hi,
Currently, I am populating a unique product serial number in a table column using a sequence call to generate new number. For different products, I have different sequences and in my PL SQL code usiing IF..Else block I populate serial number for different products. For one most selling product sequence, we are reaching a Max value in production in a month and to make sure that application will continue to work fine for various end users without getting any error on their screens, I want my code to switch to new sequence automatically. I just need to add another if condition but my problem is how to find accurately when max value is reached for old sequence.
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Edited by: user11695088 on Jul 15, 2009 12:14 AM

Catch the exception and use your new sequence. But somehow, I'm not liking your alternative approach.
SQL> set line 300
SQL> set pages 50000
SQL> set serveroutput on
SQL> create sequence testing_seq increment by 1 start with 1 maxvalue 3
2 /
Sequence created.
SQL>
SQL> create or replace procedure test_seq_proc(p_seq out number)
2 is
3 begin
4     select testing_seq.nextval
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10 end;
11 /
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2 begin
3     test_seq_proc(v_out);
4 end;
5 /
1
PL/SQL procedure successfully completed.
SQL> /
2
PL/SQL procedure successfully completed.
SQL> /
3
PL/SQL procedure successfully completed.
SQL> /
declare v_out number;
ERROR at line 1:
ORA-08004: sequence TESTING_SEQ.NEXTVAL exceeds MAXVALUE and cannot be instantiated
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SQL>Cheers
Sarma.

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Antonise,
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BR,
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