`information_schema.routines.interval_type`

mysql

type: CHARACTER_DATA NULL

Note:

Always null, since this information is not applied to return data types in PostgreSQL

10-15

type: CHARACTER_DATA

Note:

Always null, since this information is not applied to return data types in PostgreSQL

7.4-9.6

type: NULL

Note:

Always NULL.

type: NVARCHAR(30) NULL

Note:

NULL. Reserved for future use.