information_schema.character_sets.*

show items implemented by
relation column mysqlmariadbtidbpostgrescockroachdbmssql
character_sets  
character_repertoire unsupported unsupported unsupported SQL_IDENTIFIER: SQL_IDENTIFIER NULL: unsupported
character_set_catalog unsupported unsupported unsupported SQL_IDENTIFIER: SQL_IDENTIFIER NULL: unsupported
character_set_name VARCHAR NOT NULL:
5.7-8
VARCHAR NOT NULL: NULL: VARCHAR(32) NULL: SQL_IDENTIFIER: SQL_IDENTIFIER NULL: unsupported
character_set_schema unsupported unsupported unsupported SQL_IDENTIFIER: SQL_IDENTIFIER NULL: unsupported
default_collate_catalog unsupported unsupported unsupported SQL_IDENTIFIER: SQL_IDENTIFIER NULL: unsupported
default_collate_name VARCHAR NOT NULL:
5.7-8
VARCHAR NOT NULL: NULL: VARCHAR(32) NULL: SQL_IDENTIFIER: SQL_IDENTIFIER NULL: unsupported
default_collate_schema unsupported unsupported unsupported SQL_IDENTIFIER: SQL_IDENTIFIER NULL: unsupported
description VARCHAR NOT NULL:
5.7-8
VARCHAR NOT NULL: NULL: VARCHAR(60) NULL: unsupported unsupported unsupported
form_of_use unsupported unsupported unsupported SQL_IDENTIFIER: SQL_IDENTIFIER NULL: unsupported
maxlen BIGINT NOT NULL:
5.7-8
BIGINT NOT NULL: NULL: BIGINT(3) NULL: unsupported unsupported unsupported