Class PredefinedExpression (0.7.0) 

PredefinedExpression(value)

The available masking rules. Learn more here: https://cloud.google.com/bigquery/docs/column-data-masking-intro#masking_options.

    - STRING: ""
    - BYTES: b''
    - INTEGER: 0
    - FLOAT: 0.0
    - NUMERIC: 0
    - BOOLEAN: FALSE
    - TIMESTAMP: 1970-01-01 00:00:00 UTC
    - DATE: 1970-01-01
    - TIME: 00:00:00
    - DATETIME: 1970-01-01T00:00:00
    - GEOGRAPHY: POINT(0 0)
    - BIGNUMERIC: 0
    - ARRAY: []
    - STRUCT: NOT_APPLICABLE
    - JSON: NULL
LAST_FOUR_CHARACTERS (9):
    Masking expression shows the last four characters of text.
    The masking behavior is as follows:

    - If text length > 4 characters: Replace text with XXXXX,
      append last four characters of original text.
    - If text length <= 4 characters: Apply SHA-256 hash.
FIRST_FOUR_CHARACTERS (10):
    Masking expression shows the first four characters of text.
    The masking behavior is as follows:

    - If text length > 4 characters: Replace text with XXXXX,
      prepend first four characters of original text.
    - If text length <= 4 characters: Apply SHA-256 hash.
EMAIL_MASK (12):
    Masking expression for email addresses. The masking behavior
    is as follows:

    - Syntax-valid email address: Replace username with XXXXX.
      For example, cloudysanfrancisco@gmail.com becomes
      XXXXX@gmail.com.
    - Syntax-invalid email address: Apply SHA-256 hash.

    For more information, see `Email
    mask <https://cloud.google.com/bigquery/docs/column-data-masking-intro#masking_options>`__.
DATE_YEAR_MASK (13):
    Masking expression to only show the year of `Date`,
    `DateTime` and `TimeStamp`. For example, with the year
    2076:

    - DATE : 2076-01-01
    - DATETIME : 2076-01-01T00:00:00
    - TIMESTAMP : 2076-01-01 00:00:00 UTC

    Truncation occurs according to the UTC time zone. To change
    this, adjust the default time zone using the `time_zone`
    system variable. For more information, see the System
    variables reference.

Enums
Name Description
PREDEFINED_EXPRESSION_UNSPECIFIED Default, unspecified predefined expression. No masking will take place since no expression is specified.
SHA256 Masking expression to replace data with SHA-256 hash.
ALWAYS_NULL Masking expression to replace data with NULLs.
DEFAULT_MASKING_VALUE Masking expression to replace data with their default masking values. The default masking values for each type listed as below: