JSON Type

The JSON type can contain any valid Javascript Object Notation data, including maps, arrays, and nested types. For more information see the JSON Guide .

While the DDL will allow you to specify a length of up to 4GB, there is an internal limit applied when assigning a value to a string or JSON field that caps the maximum size of a single value to max_allowed_packet. This is 100MB by default and can be set to up to 1GB.