CREATE DATABASE

Syntax

CREATE DATABASE [IF NOT EXISTS] <database_name> [<sync_options>] [PARTITIONS n]
    [<create_specification>] 

  
   
 
<sync_options>: 
WITH {SYNC | ASYNC} DURABILITY 
 | WITH {SYNC | ASYNC} REPLICATION 
| WITH SYNC DURABILITY SYNC REPLICATION | WITH ASYNC DURABILITY ASYNC REPLICATION

<create_specification>:
    [DEFAULT] CHARACTER SET [=] charset_name 

 
 
 

 
 

-- "schema" is an alias for "database"
CREATE SCHEMA [IF NOT EXISTS]..

Remarks

• database_name is the name to assign to this new SingleStore database. Do not use the _XX suffix (such as test_database_01) while naming a SingleStore database as it may cause a mismatch with the database partition ordinals (sharded databases on each leaf node).

• Database names are case-sensitive. Databases named DB and db are not the same objects and will be treated as such when granting permissions to users.

• WITH {SYNC | ASYNC} REPLICATION specifies whether high availability, redundancy-2 replication will be done synchronously or asynchronously. Synchronous replication from the master partitions will complete on all replicas before the commit of the transaction is acknowledged to the client application. If WITH {SYNC | ASYNC} REPLICATION is not specified, synchronous replication is used.

  See Replication and Durability Concepts for more information.

• WITH {SYNC | ASYNC} DURABILITY specifies whether in-memory database updates you make using DDL and DML commands are also saved to the log on disk synchronously or asynchronously. Synchronous updates to the log on disk will complete before the commit of the transaction is acknowledged to the client application. If WITH {SYNC | ASYNC} DURABILITY is not specified, async durability is used.

  Note

  SYNC DURABILITY cannot be disabled once a database is created.

  See Replication and Durability Concepts for more information.

• This command causes implicit commits. Refer to COMMIT for more information.

• You cannot specify WITH SYNC DURABILITY ASYNC REPLICATION.

• PARTITIONS n allows you to set the total number of partitions that the data will be split into. By default this is controlled by the default_partitions_per_leaf variable. Note that n refers to the total number of partitions across all leaves.

• The CREATE DATABASE ... DEFAULT CHARSET= syntax is accepted by SingleStore for compatibility with MySQL, but it has no effect. SingleStore gives all databases a default charset of utf8.

• Node Requirements for SingleStore Commands

• The ceph_mode flag has been deprecated.

• Refer to the Permission Matrix for the required permission.

Examples

CREATE DATABASE IF NOT EXISTS test;

CREATE DATABASE IF NOT EXISTS test WITH SYNC DURABILITY;