`information_schema.domains.character_set_name`

mysql

type: SQL_IDENTIFIER NULL

Note:

Applies to a feature not available in PostgreSQL

10-15

type: SQL_IDENTIFIER

Note:

Applies to a feature not available in PostgreSQL

7.4-9.6

type: NVARCHAR(128) NULL

Note:

Returns the unique name for the character set if this column is character data or text data type. Otherwise, NULL is returned.