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https://issues.apache.org/jira/browse/CASSANDRA-570?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12781270#action_12781270
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Suhail Doshi commented on CASSANDRA-570:
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Is it possible to improve slicing in the following way then:
Ability to slice a column and specify an exact super column key, for example:
column_1 {
sc1: {}
}
column_2 {
sc1: {}
sc2: {}
}
Be able to slice by "column_1" to "column_2" but instead of grabbing every
column, grab only super column "sc1" from each? The reasoning is that it's
terrible to have to slice by column and get *every* super column and have it
held in memory for the client application.
> Pattern matching / better filtering for column / super column names for
> get_slice
> ---------------------------------------------------------------------------------
>
> Key: CASSANDRA-570
> URL: https://issues.apache.org/jira/browse/CASSANDRA-570
> Project: Cassandra
> Issue Type: Improvement
> Affects Versions: 0.5, 0.9
> Reporter: Suhail Doshi
>
> It would be useful to be able to pattern match or wildcard in a column name.
> The problem is sometimes you need more depth where supercolumns are not
> enough. The hack around solution is prefixing things but when you prefix
> things you realize you need a better way to filter through the prefixed data.
> I am voting for a way to pattern match or permit some kind of wildcarding in
> the column if possible.
> For example:
> column name="prefix_20091122_male"
> column name="prefix2_20091122_female"
> Cassandra could be used in complex data situation for people who want to grab
> all data from the date: 20091122 or grab all data from the date: "20091122"
> and that is of type male or female through some kind of wildcard / pattern
> matching scheme.
> I won't propose one because I do not understand Cassandra well enough to but
> it seems like this may be possible and worth a discussion.
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