V$IM_COLUMN_LEVEL

V$IM_COLUMN_LEVEL presents the selective column compression levels that are defined using the inmemory_memcompress clause of the inmemory_column_clause of the CREATE TABLE statement. This view returns no rows for a table which has no associated selective column compression levels. For each column of a table that is associated with selective column compression levels, this view presents the associated compression level of the column, if any, or the string DEFAULT if no compression level has been defined for the column.

Column	Datatype	Description
`INST_ID`	`NUMBER`	Instance ID
`OWNER`	`VARCHAR2(31)`	Username of the table owner
`OBJ_NUM`	`NUMBER`	Table object number
`TABLE_NAME`	`VARCHAR2(31)`	Table name
`SEGMENT_COLUMN_ID`	`NUMBER`	Segment column number
`COLUMN_NAME`	`VARCHAR2(31)`	Column name
`INMEMORY_COMPRESSION`	`VARCHAR2(26)`	Column compression level
`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

Note:

This view is available starting with Oracle Database 12c Release 1 (12.1.0.2).