Updated on 2024-06-07 GMT+08:00

Adding a SQL Statement Concurrency Control Rule for a Database

Function

This API is used to add a SQL statement concurrency control rule for a database.

  • Before calling an API, you need to understand the API in Authentication.

URI

  • URI format

    POST /v3/{project_id}/instances/{instance_id}/sql-limit

  • Parameter description
    Table 1 Parameters

    Parameter

    Mandatory

    Description

    project_id

    Yes

    Project ID of a tenant in a region.

    To obtain it, refer to Obtaining a Project ID.

    instance_id

    Yes

    Instance ID.

Request

Table 2 Parameters

Parameter

Mandatory

Type

Description

db_name

Yes

String

Database name.

query_id

No

Long

Internal hash code calculated by the SQL parse tree. The default value is 0. The value range is from -9223372036854775808 to 9223372036854775807.

query_string

No

String

Text format of an SQL statement. Only either query_id or query_string can be specified.

max_concurrency

Yes

Integer

Number of SQL statements that can be executed at the same time. If the value is less than or equal to 0, the number is not limited. The default value is 0. The value range is from -1 to 50000.

max_waiting

Yes

Integer

Maximum waiting time, in seconds.

search_path

No

String

Schema search order set for names that are not schema-qualified. The default value is public.

Example Request

Add a SQL statement concurrency control rule for a database.

POST https://rds.ap-southeast-1.myhuaweicloud.com/v3/0483b6b16e954cb88930a360d2c4e663/instances/49b9dd1d6f464ba4bc91df5cbd2e52ebin03/sql-limit

{ 
   "db_name" : "postgres", 
   "query_id" : 1, 
   "max_concurrency" : 10, 
   "max_waiting" : 10, 
   "search_path" : "public" 
 }

Response

  • Normal response
    Table 3 Parameters

    Parameter

    Type

    Description

    resp

    String

    Returns successful if the invoking is successful.

Status Code

Error Code

For details, see Error Codes.