`information_schema.partitions.partition_comment`

mysql

type: TEXT NOT NULL

5.7-8

type: NULL

Note:

Partition comment, truncated to 80 characters, or an empty string if no comment.

5.1-10.8

type: VARCHAR NOT NULL

Note:

Partition comment, truncated to 80 characters, or an empty string if no comment.

type: VARCHAR(80) NULL

4-6.1