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Tyler Hobbs commented on CASSANDRA-11877:
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bq. Make LegacyCell implement Unfiltered, so we can treat legacy and non-legacy
partition uniformly on ColumnIndex.add
I'm not sure that's going to work well. A {{LegacyCell}} is simply one cell,
not a row, so it seems like there are going to be some conceptual mismatches.
It's also worth noting that the on-wire serialization is different from the
on-disk serialization format. In particular, range tombstones are handled
differently (see {{ColumnIndex.add()}} and {{ColumnIndex.build()}} in 2.2). It
may be simplest (although still nasty) to try to port the 2.2 version of
{{ColumnIndex}} to 3.0 using the {{Legacy}} classes, because the logic is quite
a bit different than the 3.0 logic.
> Add support to legacy row serialization on BigTableWriter
> ---------------------------------------------------------
>
> Key: CASSANDRA-11877
> URL: https://issues.apache.org/jira/browse/CASSANDRA-11877
> Project: Cassandra
> Issue Type: Sub-task
> Components: Tools
> Reporter: Paulo Motta
> Assignee: Kaide Mu
> Priority: Minor
>
> In order to support writing pre-3.0 sstables, we must add support to legacy
> cell serialization to {{BigTableWriter}}.
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