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.
Name of the dynamic performance table that is indexed
Number that distinguishes to which index a column belongs
Name of the column that is being indexed
Position of the column in the index key (this is mostly relevant for multicolumn indexes)
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