KM problem on ODI

Question

Hi gurus,
I would like to know if there is a knowledge module on ODI that allows us to delete from the target table the records that are no longer available in the source table.
I am using an incremental update module is there a way to change customize it in order to get what i want ?
Every suggestion or piece of advice is welcome.
Thanks again.
ZI

Answer 1

Just to follow on from what BOS said, we had to do exactly that on my project so I duplicated a pair of KM's (LKM and IKM) to start as a base point, pulled all the primary keys (defined as Unique Keys on our datastores) from the source table into the staging 'collection table' using substitution method :
<%=odiRef.getColList("", "[COL_NAME]", ",\n\t", "", "UK")%> in the select list.
Then deleted from target where not source rows not exists on the target , matching using :
select 'X' from <%=odiRef.getInfo( "TARG_NAME" )%> S
          where
          <%=odiRef.getColList("", "\tT.[COL_NAME]=S.[COL_NAME]", "\n\tand\t", "", "UK")%>
What I do is find a Knowlede Module (step) that is building the basic structure of what I want to achieve, crate table as select, create view as select x,y,z etc. Merge into etc. etc. then duplicate those steps into a new one and hack it up as apprpriate.
If you want to keep it simple, you could do allsorts :
define as view as the collection staging area (not a table) - remove any DML from the LKM and simply use the view in the IKM as your source