Michael Penick created CASSANDRA-10247:
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Summary: Allow both named values and regular values to
simultaneously work in batches
Key: CASSANDRA-10247
URL: https://issues.apache.org/jira/browse/CASSANDRA-10247
Project: Cassandra
Issue Type: Improvement
Reporter: Michael Penick
Currently, there's a single {{<flag>}} to determine whether a batch uses named
values or not. This forces all query entries in a batch to use the same value
encoding. There's also the fact that the current design is broken. See:
CASSANDRA-10246
I propose that this information be encoded using the batch entries {{<kind>}}
component and remove "0x40: With names for values" as an option from
{{<flags>}}. In the current design the {{<kind>}}, a {{[byte]}}, only uses two
values 0 and 1 for non-prepared and prepared, respectively. The proposed
solution would add two more values 2 and 3 for non-prepared w/ names values and
prepared w/ named values. This has a couple benefits:
1) It allows for heterogeneous value encodings in a single batch
2) It eliminates the need for reading ahead to determine the value encodings
(See: CASSANDRA-10246)
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