executemany question

I may be misunderstanding the purpose of
cursor.executemany(query, sequence_of_params) ...

The doc says "Execute a query many times, once
for each params in the sequence."  I had hoped
the results would accumulate in the cursor, but
it doesn't appear to (perhaps I'm doing something
wrong!).  Here's what I'm doing:

curs.executemany('select * from docs where doc_number = %s', docnums)

in which docnums is a list of strings, which are
values of doc_number.  (I've verified that they are
valid.)  Then when I then do

curs.fetchall()

... I get only the result of the execution of the query
using the last item in the list (which is certainly what
you get by doing several "execute(query, parms)"
in succession).

Is this the way it's supposed to work?

And if so, what would be a good way of doing what I want to
do (i.e., feed in a sequence of parameters and get
back a cumulative result of executing the same
query with each one)?

Should I just loop over execute() calls in my code and
do my own accumulation?

TIA!
Steve.



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