Creating a Schema

Function

This API is used to create a schema.

Constraints

Before creating a schema, ensure that you have associated RDS instances with your DDM instance and that the RDS instances are not associated with other DDM instances.

URI

POST /v1/{project_id}/instances/{instance_id}/databases

**Table 1** Path parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Project ID of a tenant in a region
instance_id	Yes	String	DDM instance ID

Request Parameters

**Table 2** Request header parameters
Parameter	Mandatory	Type	Description
X-Auth-Token	Yes	String	User token It can be obtained by calling an IAM API. The value of X-Subject-Token in the response header is the user token.

**Table 3** Request body parameters
Parameter	Mandatory	Type	Description
databases	Yes	Array of `CreateDatabaseDetail <ddm_16_0001__request_createdatabasedetail>` objects	Schema information

**Table 4** CreateDatabaseDetail
Parameter	Mandatory	Type	Description
name	Yes	String	Schema name, which: Can include 2 to 48 characters. Must start with a letter. Contains only lowercase letters, digits, and underscores (_). Cannot contain keywords information_schema, mysql, performance_schema, or sys. Minimum length: 2 characters Maximum length: 48 characters
shard_mode	Yes	String	Sharding mode of the schema. The value can be: cluster: indicates that the schema is in sharded mode. single: indicates that the schema is in unsharded mode. Enumerated values: cluster single
shard_number	Yes	Integer	Number of shards in the same working mode If shard_unit is not empty, the value is the product of shard_unit multiplied by the associated RDS instances. If shard_unit is left blank, the value must be greater than the number of associated RDS instances and less than or equal to the product of the associated RDS instances multiplied by 64.
shard_unit	No	Integer	Number of shards per RDS instance This parameter is optional. The value is 1 if the schema is unsharded. The value ranges from 1 to 64 if the schema is sharded. Minimum value: 1 Maximum value: 64
used_rds	Yes	Array of `DatabaseInstabcesParam <ddm_16_0001__request_databaseinstabcesparam>` objects	RDS instances associated with the schema

**Table 5** DatabaseInstabcesParam
Parameter	Mandatory	Type	Description
id	Yes	String	ID of the RDS instance associated with the schema
adminUser	Yes	String	Username for logging in to the associated RDS instance
adminPassword	Yes	String	Password for logging in to the associated RDS instance

Response Parameters

Status code: 200

**Table 6** Response body parameters
Parameter	Type	Description
databases	Array of `CreateDatabaseDetailResponses <ddm_16_0001__response_createdatabasedetailresponses>` objects	Schema information

**Table 7** CreateDatabaseDetailResponses
Parameter	Type	Description
name	String	Schema name

Status code: 400

**Table 8** Response body parameters
Parameter	Type	Description
errCode	String	Service error code
externalMessage	String	Error message

Status code: 500

**Table 9** Response body parameters
Parameter	Type	Description
errCode	String	Service error code
externalMessage	String	Error message

Example Request

The following is an example request of creating a schema and associating it with an existing DDM account.

POST https://{endpoint}/v1/{project_id}/instances/{instance_id}/databases

{
  "databases" : [ {
    "name" : "mytestdb",
    "shard_mode" : "cluster",
    "shard_number" : 8,
    "shard_unit" : 8,
    "used_rds" : [ {
      "id" : "f296c394f13f48449d715bf99af07e59in01",
      "adminUser" : "root",
      "adminPassword" : "PassWord_234"
    } ]
  } ]
}

Example Response

Status code: 200

{
  "databases" : [ {
    "name" : "mytestdb"
  } ]
}

Status code: 400

bad request

{
  "externalMessage" : "Parameter error.",
  "errCode" : "DBS.280001"
}

Status code: 500

server error

{
  "externalMessage" : "Server failure.",
  "errCode" : "DBS.200412"
}

Status Codes

Status Code	Description
200	OK
400	bad request
500	server error

Error Codes

For details, see Error Codes <ddm_api_01_0061>.

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