ALTER MASK RULE

CreateEncryptRule ::=
  '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

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'))
));