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