Note
This view is available starting with V4.0.0.
Purpose
The GV$OB_PLAN_CACHE_PLAN_EXPLAIN view displays the physical execution plans cached in all OBServer nodes.
Note
This view only supports GET operations. You must specify the PLAN_ID field when you query this view.
Columns
| Column | Type | Nullable | Description |
|---|---|---|---|
| TENANT_ID | NUMBER(38) | NO | The tenant ID. |
| SVR_IP | VARCHAR2(46) | NO | The IP address of the server. |
| SVR_PORT | NUMBER(38) | NO | The port number of the server. |
| PLAN_ID | NUMBER(38) | NO | The ID of the plan. |
| PLAN_DEPTH | NUMBER(38) | NO | The depth of the operator when it is displayed. |
| PLAN_LINE_ID | NUMBER(38) | NO | The ID of the operator. |
| OPERATOR | VARCHAR2(128) | NO | The name of the operator. |
| NAME | VARCHAR2(256) | NO | The name of the table. |
| ROWS | NUMBER(38) | NO | The estimated number of rows. |
| COST | NUMBER(38) | NO | The estimated cost. |
| PROPERTY | VARCHAR2(4096) | NO | The information about the operator. |
Sample query
Query the
PLAN_IDof the current OBServer node from the GV$OB_PLAN_CACHE_PLAN_STAT view.obclient [SYS]> SELECT PLAN_ID FROM SYS.GV$OB_PLAN_CACHE_PLAN_STAT WHERE ROWNUM < 5;The query result is as follows:
+---------+ | PLAN_ID | +---------+ | 800 | | 802 | | 803 | | 804 | +---------+ 4 rows in set (0.011 sec)Query the physical execution plan in the plan cache from the
GV$OB_PLAN_CACHE_PLAN_EXPLAINview. For example,PLAN_ID=800.obclient [SYS]> SELECT * FROM SYS.GV$OB_PLAN_CACHE_PLAN_EXPLAIN WHERE PLAN_ID = 800\GThe query result is as follows:
*************************** 1. row *************************** TENANT_ID: 1004 SVR_IP: xx.xx.xx.xx SVR_PORT: 2882 PLAN_ID: 800 PLAN_DEPTH: 0 PLAN_LINE_ID: 0 OPERATOR: PHY_TABLE_SCAN NAME: __all_transfer_task ROWS: 1 COST: 2 PROPERTY: table_rows:1, physical_range_rows:1, logical_range_rows:1, index_back_rows:0, output_rows:1, avaiable_index_name[__all_transfer_task] 1 row in set (0.023 sec)