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Sylvain Lebresne commented on CASSANDRA-10179:
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This actually mean that this would be breaking change from the client point of
view, and we would kind of have to maintain it as an {{InvalidQueryException}}
for the protocol version < 4 if we want to be nice to users (coordinating with
drivers is not enough since we can't force users to upgrade drivers). Which
will be a tad annoying.
> Duplicate index should throw AlreadyExistsException
> ---------------------------------------------------
>
> Key: CASSANDRA-10179
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10179
> Project: Cassandra
> Issue Type: Bug
> Reporter: T Jake Luciani
> Assignee: Sam Tunnicliffe
> Priority: Minor
> Fix For: 3.0.x
>
>
> If a 2i already exists we currently throw a InvalidQueryException. This
> should be a AlreadyExistsException for consistency like trying to create the
> same CQL Table twice.
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