Union in ODI using KM

Question

Hi,
I am trying to do union between 2 tables in ODI. It worked the following ways :-
1) By writing two interfaces and writing package on it.
2) Writing view on the tables in the database & then using this as a source in the interface
But I could not get the third way i.e. using KM. How do i do union between tables using LKM? I tried modifying the LKM SQL to SQL, but that did not work..

Answer 1

my need was to create an union like that:
insert into TRG_table (TRGC1,TRGC2,TRGC3)
select SRC1C1,SRC1C2,SRC1C3
from SRC1
union
select SRC2C1,SRC2C2,SRC2C3+SRC2C4
from SRC2
etc...
I created one temporary interface for each select with a particular KM that create a view...
each temporary interface must have the same column as my TRG_TABLE: TRGC1,TRGC2,TRGC3
the IKM has just one step with the code
create view <%=odiRef.getTable("L","TARG_NAME","A")%>
     <%=odiRef.getColList("", "[COL_NAME]", ",\n\t", "", "((INS and !TRG) and REW)")%>
select <%=odiRef.getPop("DISTINCT_ROWS")%>
     <%=odiRef.getColList("", "[EXPRESSION]", ",\n\t", "", "((INS and !TRG) and REW)")%>
from      <%=odiRef.getFrom()%>
where     <% if (odiRef.getPop("HAS_JRN").equals("0")) { %>
     (1=1)
     <%} else {%>
     JRN_FLAG <> 'D'
     <% } %>
<%=odiRef.getJoin()%>
<%=odiRef.getFilter()%>
<%=odiRef.getJrnFilter()%>
... I have 3 tempraries interfaces:
TSRC1, TSRC2, TSRC3 with the same column... each of them generated as a view
After that i created an interface with the 3 temporaries interfaces in source and i created a specifique IKM to do the union
like that:
insert into <%=odiRef.getTable("L","TARG_NAME","A")%>
     <%=odiRef.getColList("", "[COL_NAME]", ",\n\t", "", "((INS and !TRG) and REW)")%>
select <%=odiRef.getColList("", "[COL_NAME]", ",\n\t", "", "((INS and !TRG) and REW)")%> from <%=odiRef.getTable("L","TARG_NAME","A")%>
where 1=2
<%=odiRef.getSrcTablesList("", " \nunion select * from [WORK_SCHEMA].[TABLE_NAME]", "", "")%>
the generated code was
insert into TRG_table (TRGC1,TRGC2,TRGC3)
select TRGC1,TRGC2,TRGC3 from TRG_table where 1=2
union select TRGC1,TRGC2,TRGC3 from TSRC1
union select TRGC1,TRGC2,TRGC3 from TSRC2
union select TRGC1,TRGC2,TRGC3 from TSRC3