Performs Base64 decoding of a field. The decoded value is subsequently
decoded as binary representation of a string according to the
charset parameter. To
work with actual binary data, use
ISO-8859-1 character set.
|Name of the field in which to store the decoded value.
| The character set to use when transforming bytes to string. Validated type is
|The field on which to decode Base64 values.
[a] Optional parameters use their default value unless explicitly set
Omitted Argument Names
The argument name for
fieldcan be omitted; the following forms of this function are equivalent:logscale
Behavior on Invalid Encoding
An input field that does not contain a valid Base64 encoding may result in the following behavior:
Characters outside the base encoding alphabet are ignored.
If the base encoding is invalid, the output field is not created.
When decoding to a code point that is invalid with respect to the selected charset, the invalid code point is replaced with a placeholder character.
Decode the Base64 value in encoded and stores it in decoded:
decoded := base64Decode(encoded)