cursor.rowcount is wrong (by about 32 bits)

[jkyeung]

Using the following packages as reported by yum list:

python3.ppc64                          3.6.8-1
python3-ibm_db.ppc64                   2.0.5.9-0

After updating some rows using cursor.execute, cursor.rowcount is not set to the actual number of affected rows, but rather (actual_rows + 1) * 2**32 - 1. I imagine this is due to some mix-up with respect to integer size in the C implementation.

[kadler]

This is a 64-bit issue caused by SQLLEN being defined as a long instead of an int/SQLINTEGER:

https://github.com/kadler/python-ibmdb/blob/ibmi/IBM_DB/ibm_db/ibm_db.h#L152