Is there a clear equivalent of 'show keyspaces' in cqlsh 2?

问题

What cqlsh command can I use to quickly see the keyspaces in a cluster? cqlsh does not provide show keyspaces and describe cluster isn't as concise as I want.

I'm working using the following specifications:

cqlsh 2.2.0, Cassandra 1.1.10, CQL spec 2.0.0, Thrift protocol 19.33.0

回答1:

Very simple. Just enter this command in your cqlsh shell and enjoy

 select * from system.schema_keyspaces;

In C*3.x, we can simply use

 describe keyspaces

回答2:

Just try this:

describe keyspaces

However you may need specs of approximately the following (rather than those mentioned by yourself Crowie)

[cqlsh 4.1.1 | Cassandra 2.0.6 | CQL spec 3.1.1 | Thrift protocol 19.39.0]

回答3:

cqlsh> select * from system_schema.keyspaces;

 keyspace_name      | durable_writes | replication
--------------------+----------------+-------------------------------------------------------------------------------------
        system_auth |           True | {'class': 'org.apache.cassandra.locator.SimpleStrategy', 'replication_factor': '1'}
      system_schema |           True |                             {'class': 'org.apache.cassandra.locator.LocalStrategy'}
 system_distributed |           True | {'class': 'org.apache.cassandra.locator.SimpleStrategy', 'replication_factor': '3'}
             system |           True |                             {'class': 'org.apache.cassandra.locator.LocalStrategy'}
      system_traces |           True | {'class': 'org.apache.cassandra.locator.SimpleStrategy', 'replication_factor': '2'}

回答4:

The correct way with C* 3.x series is:

List<KeyspaceMetadata> keyspaces = Cluster.getMetadata().getKeyspaces()

Then use getName() on the KeyspaceMetadata instances.

来源：https://stackoverflow.com/questions/16612463/is-there-a-clear-equivalent-of-show-keyspaces-in-cqlsh-2

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cql

cqlsh