CREATE KEYSPACE

Synopsis

Use the CREATE KEYSPACE statement to create a keyspace that functions as a grouping mechanism for database objects, (such as tables or types).

Syntax

Diagram

create_keyspace

CREATEKEYSPACESCHEMAIFNOTEXISTSkeyspace_namekeyspace_properties

keyspace_properties

WITHREPLICATION={,keyspace_property}ANDDURABLE_WRITES=truefalse

Grammar

create_keyspace ::= CREATE { KEYSPACE | SCHEMA } [ IF NOT EXISTS ] keyspace_name
                       [ WITH REPLICATION '=' '{' keyspace_property '}']
                       [ AND DURABLE_WRITES '=' { true | false } ]

keyspace_property ::= property_name = property_value

Where

  • keyspace_name and property_name are identifiers.
  • property_value is a literal of either boolean, text, or map data type.

Semantics

  • An error is raised if the specified keyspace_name already exists unless IF NOT EXISTS option is present.
  • Cassandra's CQL keyspace properties are supported in the syntax but have no effect internally (where YugabyteDB defaults are used instead).

Examples

ycqlsh> CREATE KEYSPACE example;

ycqlsh> DESCRIBE KEYSPACES;

example  system_schema  system_auth  system

ycqlsh> DESCRIBE example;

CREATE KEYSPACE example WITH REPLICATION = {'class': 'SimpleStrategy', 'replication_factor': '3'} AND DURABLE_WRITES = true;

ycqlsh> CREATE SCHEMA example;

SQL error: Keyspace Already Exists
CREATE SCHEMA example;
^^^^^^

See also