base64_decode_string

This function is the same as from_base64. Decodes a Base64-encoded string. and an inverse of to_base64.

This function is supported from v3.0.

Syntax

base64_decode_string(str);

Parameters

str: the string to decode. It must be of the VARCHAR type.

Return value

Returns a value of the VARCHAR type. If the input is NULL or an invalid Base64 string, NULL is returned. If the input is empty, an error is returned.

This function accepts only one string. More than one input string causes an error.

Examples

mysql> select base64_decode_string(to_base64("Hello StarRocks"));
+----------------------------------------------------+
| base64_decode_string(to_base64('Hello StarRocks')) |
+----------------------------------------------------+
| Hello StarRocks                                    |
+----------------------------------------------------+