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ResultSet: handle empty non-final pages on ResultSet iteration - #102
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This commit provides a fix to the situation when iterating on a ResultSet, the driver aborts the iteration if the server returns an empty page even if there are next pages available. Python driver is affected by the same problem as JAVA-2934 This fix is similar to apache/cassandra-java-driver#1544
| if not self.response_future._continuous_paging_session: | ||
| self.fetch_next_page() | ||
| self._page_iter = iter(self._current_rows) | ||
| return self.next() |
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@ultrabug this is identical to the next line after the if, how this fixes anything ?, do we have a test case to demonstrate this ?
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It's not doing the same. It runs the whole method again (recursively). next(self) not only calls next(self._page_iter) but also has all the logic in lines 5127-5137.
haaawk
commented
Aug 30, 2021
Would it be inappropriate to ask for a unit test? |
ultrabug
commented
Aug 30, 2021
Thanks @fruch
I'll try to add this on a second PR okay, first of all I need to make sure the current tests do fail because paging is supposed to be tested already... |
nyh
commented
Oct 11, 2021
We have had one all along :-) See scylladb/scylladb#8203 - though they were in the context of Scylla, not the Python driver. |
This commit provides a fix to the situation when iterating on a
ResultSet, the driver aborts the iteration if the server returns
an empty page even if there are next pages available.
Python driver is affected by the same problem as JAVA-2934
This fix is similar to apache/cassandra-java-driver#1544