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Oracle® Database Reference
12c Release 1 (12.1)

E17615-23
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V$NONLOGGED_BLOCK

V$NONLOGGED_BLOCK displays ranges of nonlogged datafile blocks recorded in the control file.

Column Datatype Description
FILE# NUMBER Absolute file number of the data file that contains the nonlogged blocks
BLOCK# NUMBER Block number of the first nonlogged block in the range of nologged blocks
BLOCKS NUMBER Number of nonlogged blocks found starting with BLOCK#
NONLOGGED_START_CHANGE# NUMBER The smallest SCN on which any block in this block range became nonlogged. NULL if unknown.
NONLOGGED_START_TIME DATE The time that corresponds to NONLOGGED_START_CHANGE#. NULL if unknown.
NONLOGGED_END_CHANGE# NUMBER The largest SCN on which any block in this block range became nonlogged. NULL if unknown.
NONLOGGED_END_TIME DATE The time that corresponds to NONLOGGED_END_CHANGE#. NULL if unknown.
RESETLOGS_CHANGE# NUMBER The resetlogs SCN of the incarnation on which this block range was first marked as nonlogged. NULL if unknown.
RESETLOGS_TIME DATE The resetlogs time of the incarnation on which this block range was first marked as nologged. NULL if unknown.
OBJECT# VARCHAR2(40) The object ID this range belongs to. If this field is NULL, the object number is unknown.
REASON CHAR(7) The reason why this block range appears in this list. For Oracle Database 12c, it is always UNKNOWN.
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