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From "Sylvain Lebresne (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-6599) CQL updates should support "column = column - { key1, key2, ... }" syntax for removing map elements
Date Tue, 26 Aug 2014 15:16:58 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-6599?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sylvain Lebresne updated CASSANDRA-6599:
----------------------------------------

    Attachment: 6599-v2.txt

So looking back at the patch to support deletion by a set, I'm no sure of the reason for the
changes to {{Sets.java}} but it make us incorrectly accept things like {{s = s + \{'a' : 'b'\}}}
where {{s}} is a set (which triggers some AssertionError) and it breaks the empty map (as
shown by the failure of the {{map_test}} in dtests). Attaching a v2 that remove those changes,
pass the proper type when preparing the value in {{Operation.Substraction}} and a few additional
tests.


> CQL updates should support "column = column - { key1, key2, ... }" syntax for removing
map elements
> ---------------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-6599
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6599
>             Project: Cassandra
>          Issue Type: Wish
>            Reporter: Gavin
>            Assignee: Benjamin Lerer
>            Priority: Minor
>              Labels: cql
>             Fix For: 2.1.1
>
>         Attachments: 6599-proto.txt, 6599-v2.txt, CASSANDRA-6599.txt
>
>
> A variable number number of elements can be removed from lists and sets using an update
statement of the form "update .... set column=column - {....} where ...".  This syntax should
also be supported for map columns.  This would be especially useful for prepared statements
(I know that you can use "set column[...] = null" to remove items in an update statement,
but that only works for one element at a time).



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