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" 
 }