[jira] Resolved: (CASSANDRA-570) Pattern matching / better filtering for column / super column names for get_slice

["Jonathan Ellis (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-570?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jonathan Ellis resolved CASSANDRA-570.
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    Resolution: Fixed

Slicing works because data in a row is stored ordered by its Comparator.  So a slice is "seek to the closest column not greater than the start, and read until you hit the finish, or count."  More complex operations cannot be done efficiently, and should be done client side if they are done at all.

> 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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