ALTER MASK RULE

Description

The ALTER MASK RULE syntax is used to create a mask rule.

Syntax

Grammar Railroad diagram

AlterEncryptRule ::=
  'ALTER' 'MASK' 'RULE' maskRuleDefinition (',' maskRuleDefinition)*
maskRuleDefinition ::=
  ruleName '(' 'COLUMNS' '(' columnDefinition (',' columnDefinition)* ')' ')'
columnDefinition ::=
  '(' 'NAME' '=' columnName ',' maskAlgorithmDefinition ')'
maskAlgorithmDefinition ::=
  'TYPE' '(' 'NAME' '=' maskAlgorithmType (',' propertiesDefinition)? ')'
propertiesDefinition ::=
  'PROPERTIES' '(' key '=' value (',' key '=' value)* ')'
ruleName ::=
  identifier
columnName ::=
  identifier
maskAlgorithmType ::=
  literal
key ::=
  string
value ::=
  literal

Supplement

• maskAlgorithmType specifies the data masking algorithm type, please refer to Data Masking Algorithm.

Example

Alter a mask rule

ALTER MASK RULE t_mask (
COLUMNS(
(NAME=phone_number,TYPE(NAME='MASK_FROM_X_TO_Y', PROPERTIES("from-x"=1, "to-y"=2, "replace-char"="*"))),
(NAME=address,TYPE(NAME='MD5'))
));

Reserved words

ALTER, MASK, RULE, COLUMNS, NAME, TYPE

Related links

• Reserved word
• Data Masking Algorithm