cassandra: Fix confusing debug logging for paged query results.

Even when caller supported paged queries, the debug output contained
"Paged query has more results, but not supported by the caller".
Clear out the error after sql_result_more() is called, so it won't be
logged.

diff --git a/src/lib-sql/driver-cassandra.c b/src/lib-sql/driver-cassandra.c
index 57b4e6ee04029b163ec798e624e82543e7eaadda..fa6a8330e52d12d8ab0224a605f7557274721d6f 100644 (file)
--- a/src/lib-sql/driver-cassandra.c
+++ b/src/lib-sql/driver-cassandra.c
@@ -1296,6 +1296,9 @@ driver_cassandra_result_more(struct sql_result **_result, bool async,
        cass_statement_set_paging_state(new_result->statement,
                                        old_result->result);
        old_result->paging_continues = TRUE;
+       /* The caller did support paging. Clear out the "...not supported by
+          the caller" error text, so it won't be in the debug log output. */
+       i_free_and_null(old_result->error);
 
        new_result->page_num = old_result->page_num + 1;
        new_result->page0_start_time = old_result->page0_start_time;