DBE_ILM

API Description

Implements ILM policies, ILM policy evaluation, and API for stopping compression jobs.

• DBE_ILM.EXECUTE_ILM

  Evaluates the ILM policy based on parameters. The prototype is as follows:

  1 2 3 4 5 6 7

  DBE_ILM.EXECUTE_ILM( OWNER IN VARCHAR2, OBJECT_NAME IN VARCHAR2, TASK_ID OUT NUMBER, SUBOBJECT_NAME IN VARCHAR2 DEFAULT NULL, POLICY_NAME IN VARCHAR2 DEFAULT 'ALL POLICIES', EXECUTION_MODE IN NUMBER DEFAULT 2);

  Table 2 DBE_ILM.EXECUTE_ILM parameters

  Parameter	Description
  OWNER	Schema to which an object belongs.
  OBJECT_NAME	Object name.
  TASK_ID	Descriptor ID of the generated ADO task.
  SUBOBJECT_NAME	Name of a data subobject.
  POLICY_NAME	Policy name. You can query the GS_ADM_ILMOBJECTS view to obtain the policy name. The default value DBE_ILM.ILM_ALL_POLICIES indicates all policies on the object. The default value of DBE_ILM.ILM_ALL_POLICIES is 'ALL POLICIES'. Lowercase letters are not supported.
  EXECUTION_MODE	Execution mode. The online mode (ILM_EXECUTION_ONLINE) or offline mode (ILM_EXECUTION_OFFLINE) is not involved in this phase.

• DBE_ILM.STOP_ILM
  Stops an ILM policy that is being executed based on parameters. The prototype is as follows:

  1 2 3 4

  DBE_ILM.STOP_ILM( TASK_ID IN NUMBER DEFAULT -1, P_DROP_RUNNING_JOBS IN BOOLEAN DEFAULT FALSE, P_JOBNAME IN VARCHAR2 DEFAULT NULL)

  Table 3 DBE_ILM.STOP_ILM parameters

  Parameter	Description
  TASK_ID	Specifies the descriptor ID of the ADO task to be stopped.
  P_DROP_RUNNING_JOBS	Determines whether to stop a task that is being executed. The value true indicates that the task is forcibly stopped, and the value false indicates that the task is not stopped.
  P_JOBNAME	Specifies the name of the job to be stopped, which can be queried in the GS_MY_ILMEVALUATIONDETAILS view.

  

  When there are a large number of concurrent requests and you run DBE_ILM.STOP_ILM, the system may display the message "Resources are busy, please try again later." In this case, try again later.

Examples

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gaussdb=# ALTER DATABASE set ilm = on;
gaussdb=# CREATE Schema ILM_DATA;
gaussdb=# SET current_schema=ILM_DATA;
BEGIN
    DBE_ILM_ADMIN.DISABLE_ILM();
    DBE_ILM_ADMIN.CUSTOMIZE_ILM(1, 15);
    DBE_ILM_ADMIN.CUSTOMIZE_ILM(2, 30);
    DBE_ILM_ADMIN.CUSTOMIZE_ILM(11, 1);
    DBE_ILM_ADMIN.CUSTOMIZE_ILM(12, 10);
    DBE_ILM_ADMIN.CUSTOMIZE_ILM(13, 1024);
    DBE_ILM_ADMIN.CUSTOMIZE_ILM(14, 240);
    DBE_ILM_ADMIN.ENABLE_ILM();
END;
/
-- 1.1.2 prepare test data
gaussdb=# CREATE SEQUENCE ILM_DATA.ORDER_TABLE_SE_ORDER_ID MINVALUE 1;
gaussdb=# CREATE OR REPLACE PROCEDURE ILM_DATA.ORDER_TABLE_CREATE_DATA(NUM INTEGER) IS
BEGIN
    FOR X IN 1..NUM
        LOOP
            INSERT INTO ORDER_TABLE VALUES(ORDER_TABLE_SE_ORDER_ID.nextval, 'Snack gift basket A', NOW());
        END LOOP;
    COMMIT;
END;
/
-- 1.1.3 normal procedure
-- 1.1.3.1 evaluate succeeded - all policy
gaussdb=# CREATE TABLE ILM_DATA.ORDER_TABLE (ORDER_ID INT, GOODS_NAME TEXT, CREATE_TIME TIMESTAMP)
    WITH (STORAGE_TYPE=ASTORE) ILM ADD POLICY ROW STORE COMPRESS ADVANCED ROW AFTER 1 DAYS OF NO MODIFICATION;
BEGIN
    ILM_DATA.ORDER_TABLE_CREATE_DATA(5);
    PERFORM PG_SLEEP(2);
END;
/

gaussdb=# SELECT ORDER_ID, DBE_COMPRESSION.GET_COMPRESSION_TYPE('ilm_data', 'order_table', ctid::text, NULL) FROM ILM_DATA.ORDER_TABLE;
 order_id | get_compression_type 
----------+----------------------
        1 |                    1
        2 |                    1
        3 |                    1
        4 |                    1
        5 |                    1
(5 rows)

gaussdb=# SELECT ORDER_ID, DBE_HEAT_MAP.ROW_HEAT_MAP('ilm_data','order_table', NULL, ctid::text) FROM ILM_DATA.ORDER_TABLE;
 order_id |                 row_heat_map                  
----------+-----------------------------------------------
        1 | (ilm_data,order_table,,,16799,16799,"(0,1)",)
        2 | (ilm_data,order_table,,,16799,16799,"(0,2)",)
        3 | (ilm_data,order_table,,,16799,16799,"(0,3)",)
        4 | (ilm_data,order_table,,,16799,16799,"(0,4)",)
        5 | (ilm_data,order_table,,,16799,16799,"(0,5)",)
(5 rows)

DECLARE
    v_taskid number;
BEGIN
    DBE_ILM.EXECUTE_ILM(OWNER        => 'ilm_data',
                        OBJECT_NAME    => 'order_table',
                        TASK_ID        => v_taskid,
                        SUBOBJECT_NAME => NULL,
                        POLICY_NAME    => 'ALL POLICIES',
                        EXECUTION_MODE => 2);
    RAISE INFO 'Task ID is:%', v_taskid;
END;
/
INFO:  Task ID is:1

gaussdb=# SELECT ORDER_ID, DBE_COMPRESSION.GET_COMPRESSION_TYPE('ilm_data', 'order_table', ctid::text, NULL) FROM ILM_DATA.ORDER_TABLE;
 order_id | get_compression_type 
----------+----------------------
        1 |                    1
        2 |                    1
        3 |                    1
        4 |                    1
        5 |                    1
(5 rows)

gaussdb=# CALL DBE_ILM.STOP_ILM(-1, true, NULL);
 stop_ilm 
----------

(1 row)