REDACTION_COLUMNS describes all redacted columns in the database, giving the owner of the table or view within which the column resides, the object name, the column name, the type of redaction function, the parameters to the redaction function (if any), and an optional description of the redaction policy.

Column Datatype NULL Description
OBJECT_OWNER VARCHAR2(30) NOT NULL Owner of the object that is redacted
OBJECT_NAME VARCHAR2(30) NOT NULL Name of the object that is redacted
COLUMN_NAME VARCHAR2(30) NOT NULL Name of the column that is redacted
FUNCTION_TYPE VARCHAR2(27)   Redaction function for this column
FUNCTION_PARAMETERS VARCHAR2(1000)   Redaction function_parameters for this column
REGEXP_PATTERN VARCHAR2(512)   Regular expression pattern to search for
REGEXP_REPLACE_STRING VARCHAR2(4000)   Replacement string (up to 4000 characters in length) with up to 500 back-references to subexpressions in the form \n, (where n is a number from 1 to 9)
REGEXP_POSITION NUMBER   Integer counting from 1, giving the position where the search should begin
REGEXP_OCCURRENCE NUMBER   Either 0 (to replace all occurrences of the match), or a positive integer n (to replace the nth occurrence of the match)
REGEXP_MATCH_PARAMETER VARCHAR2(10)   To change the default matching behavior, possible values are a combination of i, c, n, m, and x. See the documentation of the match_parameter in the REGEXP_REPLACE section of the Oracle Database SQL Language Reference.
COLUMN_DESCRIPTION VARCHAR2(4000)   User-provided description of the redaction function that is performed on the column. For example, for a Social Security Number column, the description might be: "redact SSN to XXX-XX-(last 4 digits)".


This view is available starting with Oracle Database 11g Release 2 (

See Also:

Oracle Database Advanced Security Administrator's Guide for more information about Oracle Data Redaction