SNMP Table Handling

Hi,

I am just starting on SNMP and have a query on how to implement tables.

I did go through forum messages and examples found below to be
helpful, but still, have doubts.

https://sourceforge.net/p/net-snmp/mailman/message/33480025/ (This was helpful)
examples/mibgroup/netSnmpHostsTable.c

I have a single API which will get 3 different types of stats (A, B, C) and each
stats can have multiple instances, so I have made 3 different tables (A, B, C).

a) providing complete row
I want to provide the latest stats every time a request is made
(snmpwalk/snmptable). For that
I have registered a handler for each table and inside the handler,
fetching the stats.
But the problem is that the handler is called for every column? So,
for efficiency sake
I need to run a separate thread to fetch and fill only the column
asked in the handler? Is there a better approach? Like can I submit
the entire row at once?

b) replace row asserts
FYI, I am using data_set tables it already has a handler but as I want
to update the table
with new values, I am doing a replace row (it causes duplicate warnings).

Any help is appreciated. Thanks.

-- 
Thanks,
Regards,
Chaitanya T K.