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https://issues.apache.org/jira/browse/CASSANDRA-10857?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15960733#comment-15960733
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Aleksey Yeschenko commented on CASSANDRA-10857:
-----------------------------------------------
Unassigning as reviewer on this one, but feel free to assign back to me when
the patch will be ready (I know there is a dependency on CASSANDRA-12373 - I'll
review it shortly, sorry).
> Allow dropping COMPACT STORAGE flag from tables in 3.X
> ------------------------------------------------------
>
> Key: CASSANDRA-10857
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10857
> Project: Cassandra
> Issue Type: Improvement
> Components: CQL, Distributed Metadata
> Reporter: Aleksey Yeschenko
> Assignee: Alex Petrov
> Fix For: 3.11.x
>
>
> Thrift allows users to define flexible mixed column families - where certain
> columns would have explicitly pre-defined names, potentially non-default
> validation types, and be indexed.
> Example:
> {code}
> create column family foo
> and default_validation_class = UTF8Type
> and column_metadata = [
> {column_name: bar, validation_class: Int32Type, index_type: KEYS},
> {column_name: baz, validation_class: UUIDType, index_type: KEYS}
> ];
> {code}
> Columns named {{bar}} and {{baz}} will be validated as {{Int32Type}} and
> {{UUIDType}}, respectively, and be indexed. Columns with any other name will
> be validated by {{UTF8Type}} and will not be indexed.
> With CASSANDRA-8099, {{bar}} and {{baz}} would be mapped to static columns
> internally. However, being {{WITH COMPACT STORAGE}}, the table will only
> expose {{bar}} and {{baz}} columns. Accessing any dynamic columns (any column
> not named {{bar}} and {{baz}}) right now requires going through Thrift.
> This is blocking Thrift -> CQL migration for users who have mixed
> dynamic/static column families. That said, it *shouldn't* be hard to allow
> users to drop the {{compact}} flag to expose the table as it is internally
> now, and be able to access all columns.
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