V$INDEXED_FIXED_COLUMN

V$INDEXED_FIXED_COLUMN displays the columns in dynamic performance tables that are indexed (X$ tables).

The X$ tables can change without notice. Use this view only to write queries against fixed views (V$ views) more efficiently.

Column	Datatype	Description
TABLE_NAME	VARCHAR2(128)	Name of the dynamic performance table that is indexed
INDEX_NUMBER	NUMBER	Number that distinguishes to which index a column belongs
COLUMN_NAME	VARCHAR2(128)	Name of the column that is being indexed
COLUMN_POSITION	NUMBER	Position of the column in the index key (this is mostly relevant for multicolumn indexes)
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 multitenant container database (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