ShardingSphere > Reference > DistSQL > Syntax > RDL Syntax > Storage Unit Definition > REGISTER STORAGE UNIT

REGISTER STORAGE UNIT

Description

The REGISTER STORAGE UNIT syntax is used to register storage unit for the currently selected logical database.

Syntax

RegisterStorageUnit ::=
  'REGISTER' 'STORAGE' 'UNIT' storageUnitDefinition (',' storageUnitDefinition)*

storageUnitDefinition ::=
  StorageUnitName '(' ( 'HOST' '=' hostName ',' 'PORT' '=' port ',' 'DB' '=' dbName  |  'URL' '=' url  ) ',' 'USER' '=' user (',' 'PASSWORD' '=' password )?  (',' proerties)?')'

storageUnitName ::=
  identifier

hostname ::=
  string
    
port ::=
  int

dbName ::=
  string

url ::=
  string

user ::=
  string

password ::=
  string

proerties ::=
  PROPERTIES '(' property ( ',' property )* ')'

property ::=
  key '=' value

key ::=
  string

value ::=
  string

Supplement

Before register storage units, please confirm that a database has been created in Proxy, and execute the use command to successfully select a database;
Confirm that the registered storage unit can be connected normally, otherwise it will not be added successfully;
storageUnitName is case-sensitive;
storageUnitName needs to be unique within the current database;
storageUnitName name only allows letters, numbers and _, and must start with a letter;
poolProperty is used to customize connection pool parameters, key must be the same as the connection pool parameter name, value supports int and String types;
When password contains special characters, it is recommended to use the string form; For example, the string form of password@123 is "password@123".

Example

REGISTER STORAGE UNIT su_1 (
    HOST="127.0.0.1",
    PORT=3306,
    DB="db_1",
    USER="root",
    PASSWORD="root"
);

REGISTER STORAGE UNIT su_1 (
    HOST="127.0.0.1",
    PORT=3306,
    DB="db_1",
    USER="root",
    PASSWORD="root",
    PROPERTIES("maximumPoolSize"=10)
);

REGISTER STORAGE UNIT su_2 (
    URL="jdbc:mysql://127.0.0.1:3306/db_2?serverTimezone=UTC&useSSL=false",
    USER="root",
    PASSWORD="root",
    PROPERTIES("maximumPoolSize"=10,"idleTimeout"="30000")
);

Reserved word

REGISTER, STORAGE, UNIT, HOST, PORT, DB, USER, PASSWORD, PROPERTIES, URL

Reserved word