cqltypes: Serialize None values in collections as NULLs #1173
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When using parepared statements, None values in collections were serialized as empty values (values with length == 0). This is unexpected and inconsistent - None values are serialized as NULLs (vlaues with length == -1) in other cases: - Statement arguments, both for simple and prepared statements - Collection elements in simple statement This commit fixes this weird behavior - now None values should be serialized as NULLs in all cases. It also adds an integration test that checks new behavior. Fixes https://datastax-oss.atlassian.net/jira/software/c/projects/PYTHON/issues/PYTHON-1355
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When using parepared statements, None values in collections were serialized as empty values (values with length == 0). This is unexpected and inconsistent - None values are serialized as NULLs (vlaues with length == -1) in other cases:
This PR fixes this weird behavior - now None values should be serialized as NULLs in all cases. It also adds an integration test that checks new behavior.
Fixes https://datastax-oss.atlassian.net/jira/software/c/projects/PYTHON/issues/PYTHON-1355