How to specify PACKAGE SIZE for to RFC_READ_TABLE from PyRFC?

Question

I'm trying to use PyRFC to extract large tables via RFC_READ_TABLE (due to an uncooperative/unsupportive basis team).
I know that RFC_READ_TABLE supports calling it with PACKAGE SIZE since ERPConnect does it by default.
In Python for Basis (Part 1), I learned how to specify an Open SQL where clause using the OPTIONS:
result = connector.call('RFC_READ_TABLE',
                       QUERY_TABLE=tablename,
                       DELIMITER=delimiter,
                       OPTIONS = [{'TEXT':where_clause}])
Is there a way, and how to specify PACKAGE SIZE in this case?
Thanks

Answer 1

Hi,
the package size works, but you need to call the function module multiple times in a loop. Here's an excerpt of the attached script:
recordcounter = 1          #needs to be >0 to get the while loop going
iteration = 0              #the number of times the function module got called
while recordcounter > 0:  #as long as the function module calll returns rows...
    tempresult = self.call('RFC_READ_TABLE',             
                            ROWSKIPS=iteration*fetchsize,  #defines the number of rows to skip
                            **parameters)
    iteration=iteration+1  #increase the iteration
    data = tempresult['DATA']    #assign the returned rows to a variable
    if len(data) > 0:      #have there been any rows?
        for row in data:      #Do something with them
    else:
        recordcounter=0    #set recordcounter to 0 to end the while loop.
The script is far away from being perfect. It doesn't deal with RAW fields and the data types it returns are all strings. It does what I needed it to do but it may not be sufficient for what you may be trying to achieve.
Best regards
Lars