USE

Synopsis

The USE keyspace statement specifies a default keyspace for the current client session. When a database object (such as table or type ) name does not identify a keyspace, this default keyspace is used.

Syntax

Diagram

Grammar

use_keyspace ::= USE keyspace_name;

Where

• keyspace_name must be an identifier that cannot be any reserved keyword and cannot contains whitespaces, or it has to be double-quoted.

Semantics

• If the specified keyspace does not exist, an error is raised.
• Any unqualified table or type name will use the current default keyspace (or raise an error if no keyspace is set).

Examples

Create and use keyspaces

cqlsh> CREATE KEYSPACE example;

cqlsh> CREATE KEYSPACE other_keyspace;

cqlsh> USE example;

Create a table in the current keyspace

cqlsh:example> CREATE TABLE test(id INT PRIMARY KEY);
cqlsh:example> INSERT INTO test(id) VALUES (1);
cqlsh:example> SELECT * FROM test;

 id
----
  1

Create a table in another keyspace

cqlsh:example> CREATE TABLE other_keyspace.test(id INT PRIMARY KEY);
cqlsh:example> INSERT INTO other_keyspace.test(id) VALUES (2);
cqlsh:example> SELECT * FROM other_keyspace.test;

 id
----
  2

See Also

ALTER KEYSPACE CREATE KEYSPACE DROP KEYSPACE Other CQL Statements