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This patch adds two tests for two interesting edge cases in the behavior of static columns in Scylla. We already have a lot of tests for static columns in other frameworks (C++ unit tests, cql and dtest), but the two cases here are issues where specifically we weren't sure how Cassandra behaves in those cases - and this can most easily be checked in the test/cql-pytest framework. The first test, test_static_not_selected, is a reproducer for issue #10091. This issue was reported by a user @aohotnik, who was surprised by the fact that Scylla returns empty values, instead of nothing, when selecting regular columns of a non-existent row if the partition has a static column set. The test demonstrates a difference between Scylla and Cassandra, so it is marked "xfail" - it passes on Cassandra and fails on Scylla. If later we decide that both Scylla's and Cassandra's behaviours are reasonable and both can be considered "correct", we can change this test to except Scylla's result as well and it will beging to pass. The second test, test_missing_row_with_static, shows that SELECT of a non-existent row returns nothing - even if the partition has a static column. The behavior in this case is identical in Scylla and Cassandra, so this test passes. This contrasts with the analogous situation in LWT UPDATE from issue #10081, where the IF condition is expected to see the static column value. Refs #10081 Refs #10091 Signed-off-by: Nadav Har'El <nyh@scylladb.com> Message-Id: <20220220120418.831540-1-nyh@scylladb.com>