The JSON_SIZE function returns the number of bytes in the
given SUPER expression when serialized into a string.
Syntax
JSON_SIZE(super_expression)
Arguments
- super_expression
-
A
SUPERconstant or expression.
Return type
INTEGER-
The JSON_SIZE function returns an
INTEGERindicating the number of bytes in the input string. This value is different from the number of characters. For example, the UTF-8 character ⬤, a black dot, is 3 bytes in size even though it is 1 character.
Usage notes
JSON_SIZE(x) is functionally identical to
OCTET_LENGTH(JSON_SERIALIZE). However, note that JSON_SERIALIZE returns an error when
the provided SUPER expression would exceed the VARCHAR limit of the
system when serialized. JSON_SIZE does not have this limitation.
Examples
To return the length of
a SUPER value serialized to a string, use the following example.
SELECT JSON_SIZE(JSON_PARSE('[10001,10002,"⬤"]'));
+-----------+
| json_size |
+-----------+
| 19 |
+-----------+Note that the provided SUPER expression is 17 characters long, but
⬤ is a 3-byte character, so JSON_SIZE returns 19.
