Join tables and replicate (multiple rows)

Question

Hi,
i have two tables TAB1 (A, B, C) and TAB2 (C, D)
i want to join the tables and replicat such that the resultant table TAB3 has columns A, B, D
select x.a, x.b, y.d from tab1 x join tab2 y on x.c=y.c where y.d=1;
but the problem here is that the above command gives multiple rows and i need all those to be in the target table. When i am using SQLEXEC-QUERY in the mapping, only the first search result is being entered into the TAB3. Then i Found out that sqlexec will return only one value. But i need all the search results to be replicated.
What alternatives are there and what GG recommend in such use case?
Any helpful advice is much appreciated.
thanks,
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production

Answer 1

the problem to use SP to check every time before insert/update is that there will be around 15 tables not 2 and there will be lakhs of rows in each table, SP which checks every insert will cause a lot of overhead and lag. I cannot afford that.
More over there will be around 60 values of D and or each value of D there will be Lakhs of rows associated in TAB1
I need to set up different extract and replicat processes for each set of rows associated with each value of D
for example the values of column D are 1-30
for D=1 there are 1.5lakh rows in TAB1 and EXT1, REP1 for this set of rows
D=2 => 2lakhs rows in TAB2 and EXT2, REP2 for this set of rows
D=3 => 1lakhs rows in TAB2 and EXT3, REP3 for this set of rows...etc
this is to ensure that if i want to stop replicating data associated with D=1(which i need to do) i can stop only REP1 and keep the rest of the data associated with D=2-30 in sync
As far as materialized views are concerned, i need to do it with goldengate only
Thanks