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https://issues.apache.org/jira/browse/CASSANDRA-7622?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16396619#comment-16396619
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Chris Lohfink commented on CASSANDRA-7622:
------------------------------------------
Made some updates for NPs
> _can_ i drop a VT?
yes, can drop and create with own classes on classpath. Cannot drop
system_info though (same protections as other system created local keyspaces
exist)
> null class a legal state?
yes - if not a virtual table
> builder for statics
That was kinda awkward - trying to make more builder based in static block to
define the virtual tables schema like:
{code:java}
static
{
Map<String, CQL3Type> definitions = new HashMap<>();
definitions.put(KEYSPACE_NAME, CQL3Type.Native.TEXT);
definitions.put(TABLE_NAME, CQL3Type.Native.TEXT);
definitions.put(METRIC, CQL3Type.Native.TEXT);
definitions.put(VALUE, CQL3Type.Native.TEXT);
...
schemaBuilder(definitions)
.addKey(KEYSPACE_NAME)
.addKey(TABLE_NAME)
.addClustering(METRIC)
.register();
}
{code}
> Implement virtual tables
> ------------------------
>
> Key: CASSANDRA-7622
> URL: https://issues.apache.org/jira/browse/CASSANDRA-7622
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Tupshin Harper
> Assignee: Chris Lohfink
> Priority: Major
> Fix For: 4.x
>
>
> There are a variety of reasons to want virtual tables, which would be any
> table that would be backed by an API, rather than data explicitly managed and
> stored as sstables.
> One possible use case would be to expose JMX data through CQL as a
> resurrection of CASSANDRA-3527.
> Another is a more general framework to implement the ability to expose yaml
> configuration information. So it would be an alternate approach to
> CASSANDRA-7370.
> A possible implementation would be in terms of CASSANDRA-7443, but I am not
> presupposing.
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