DBA_FREE_SPACE
DBA_FREE_SPACE describes the free extents in all tablespaces in the database.
If a data file (or entire tablespace) is offline in a locally managed tablespace, you will not see any extent information. If an object has extents in an online file of the tablespace, you will see extent information about the offline data file. However, if the object is entirely in the offline file, a query of this view will not return any records.
If a data file does not have any free space, you will not see a row for the data file in this view.
Related View
USER_FREE_SPACE describes the free extents in the tablespaces accessible to the current user.
| Column | Datatype | NULL | Description |
|---|---|---|---|
TABLESPACE_NAME |
VARCHAR2(30) |
Name of the tablespace containing the extent | |
FILE_ID |
NUMBER |
Absolute file number of the data file containing the extent | |
BLOCK_ID |
NUMBER |
Starting block number of the extent | |
BYTES |
NUMBER |
Size of the extent (in bytes) | |
BLOCKS |
NUMBER |
Size of the extent (in Oracle blocks) | |
RELATIVE_FNO |
NUMBER |
Relative file number of the file containing the extent |
See Also: “USER_FREE_SPACE”