1. Database Reference
  2. Dynamic Performance Views
  3. Dynamic Performance (V$) Views: V$SCHEDULER_RUNNING_JOBS to V$ZONEMAP_USAGE_STATS
  4. V$SES_OPTIMIZER_ENV

9.14 V$SES_OPTIMIZER_ENV

V$SES_OPTIMIZER_ENV displays the contents of the optimizer environment used by each session. When a new session is first created, it automatically inherits its optimizer environment from the optimizer environment defined at the instance level by V$SYS_OPTIMIZER_ENV. The value of certain parameters can be dynamically modified by issuing an ALTER SESSION statement.
Column Datatype Description

SID

NUMBER

Session identifier. This column can be used to join with V$SESSION on the SID column.

ID

NUMBER

Unique identifier of the parameter in the optimizer environment

NAME

VARCHAR2(40)

Name of the parameter

SQL_FEATURE

VARCHAR2(64)

Associated feature control ID

ISDEFAULT

VARCHAR2(3)

Indicates whether the parameter is set to the default value (YES) or not (NO)

VALUE

VARCHAR2(25)

Value of the parameter for the session

CON_ID

NUMBER

The ID of the container to which the data pertains. Possible values include:

  • 0: This value is used for rows containing data that pertain to the entire CDB. This value is also used for rows in non-CDBs.

  • 1: This value is used for rows containing data that pertain to only the root

  • n: Where n is the applicable container ID for the rows containing data

See Also:

"V$SYS_OPTIMIZER_ENV"