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https://issues.apache.org/jira/browse/CASSANDRA-1704?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12928987#action_12928987
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Jim Ancona commented on CASSANDRA-1704:
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> Under what circumstances would you even want to encode a result to a type
> that was different than the one used to validate and/or sort it for storage?
I was thinking mostly of cases where type information isn't available. Right
now, there is no type information available for keys and validation_class is
optional for column values. For that reason, I think the ability to specify it
for key and column values is important. I agree that it's not necessary for
column names, especially in a first release, since the comparator type is
always available.
> CQL reads (aka SELECT)
> ----------------------
>
> Key: CASSANDRA-1704
> URL: https://issues.apache.org/jira/browse/CASSANDRA-1704
> Project: Cassandra
> Issue Type: Sub-task
> Components: API
> Affects Versions: 0.8
> Reporter: Eric Evans
> Priority: Minor
> Fix For: 0.8
>
> Original Estimate: 0h
> Remaining Estimate: 0h
>
> Data access specification and implementation for CQL.
> This corresponds to the following RPC methods:
> * get()
> * get_slice()
> * get_count()
> * multiget_slice()
> * multiget_count()
> * get_range_slices()
> * get_indexed_slices()
> The initial check-in to trunk/ uses a syntax that looks like:
> {code:SQL}
> SELECT (FROM)? <CF> [USING CONSISTENCY.<LVL>] WHERE <EXPRESSION> [ROWLIMIT X]
> [COLLIMIT Y] [ASC|DESC]
> {code}
> Where:
> * <CF> is the column family name.
> * <EXPRESSION> consists of relations chained by the AND keyword.
> * <LVL> corresponds to one of the enum values in the RPC interface(s).
> What is still undone:
> * Support for indexes
> * Counts
> * Complete test coverage
> And of course, all of this is still very much open to further discussion.
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