RE: Best way to make a table of non-unique rows, unique? -- MIDRANGE-L

Dave,

If it were me, I'd look at creating a new table with the identity column that Elvis provided a link
to.

Then, copy the data from the current PF to the new table and delete the existing PF. Now, create a
view or logical file with the same name that the original table had along with the same format, ie.
Without the new identity column.

You'd also need to recreate any existing logicals to point to the new physical.

However, when done properly, you won't need to recompile any vendor programs and the vendor
application should continue as if nothing has changed.

HTH,

Charles Wilt
--
Software Engineer
CINTAS Corporation - IT 92B
513.701.1307

wiltc@xxxxxxxxxx

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-
bounces@xxxxxxxxxxxx] On Behalf Of Dave Odom
Sent: Wednesday, May 28, 2008 6:51 PM
To: midrange-l@xxxxxxxxxxxx
Subject: Best way to make a table of non-unique rows, unique?

Gang,

I have some tables from a vendor using OLD, OLD, OLD, non-relational
architecture which allows duplicate rows. I need to find a way to make
the rows in these tables capable of having uniqueness for a unique key,
even it the rows are "copied" and kept updated to like-type tables.

Since I can't touch the original tables because they are from a vendors
app., I was thinking of copying the rows in the original tables to new
tables with an added column wherein I could put something like a
datatimestamp to make the row unique. I'd like to use something at the
database level like a trigger or stored procedure but, if necessary, I'll
write an old fashion program to do the work.

The reason for all this is that I'm using DataPropagator to map and keep
in sync tables in a data warehouse in a separate LPAR and DataPropagator
has to build a unique key over the target tables based on whatever makes
rows unique in the source tables. Well, if the source tables have
duplicates, I have to find a way around that or DataPropagator won't work
for the last 11 tables I have to map/keep in sync.

Thanks in advance,

David Odom

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