MySQL中如何找到列名长度大于5的所有列？

+-------------------+-------------------------+
| TABLE_NAME        | COLUMN_NAME             |
+-------------------+-------------------------+
| DemoTable         | UserId                  |
| DemoTable         | EndDate                 |
| DemoTable         | StartDate               |
| DemoTable         | StudentFavouriteSubject |
| DemoTable         | StudentFirstName        |
| DemoTable         | StudentId               |
| DemoTable         | ShippingDate            |
| DemoTable         | Number                  |
| DemoTable         | Value1                  |
| DemoTable         | Value两                  |
| DemoTable         | ArrivalDate             |
| DemoTable         | ShippingDate            |
| DemoTable         | UserAge                 |
| DemoTable         | UserId                  |
| DemoTable         | UserName                |
| DemoTable         | CustomerId              |
| DemoTable         | CustomerValue           |
| DemoTable         | UserId                  |
| DemoTable         | UserMailId              |
| DemoTable         | FirstName               |
| DemoTable         | Number                  |
| DemoTable         | isMarried               |
| DemoTable         | Number                  |
| DemoTable         | FruitName               |
| DemoTable         | FruitPrice              |
| DemoTable         | CustomerAllProductPrice |
| DemoTable         | CustomerId              |
| DemoTable         | CustomerName            |
| DemoTable         | UserId                  |
| DemoTable         | UserScore               |
| DemoTable         | StudentAge              |
| DemoTable         | StudentCountryName      |
| DemoTable         | StudentFirstName        |
| DemoTable         | StudentId               |
| DemoTable         | StudentLastName         |
| DemoTable         | FirstName               |
| DemoTable         | Arrivaldatetime         |
| DemoTable         | Amount                  |
| DemoTable         | Number                  |
| DemoTable         | Number                  |
| DemoTable         | FirstName               |
| DemoTable         | CustomerId              |
| DemoTable         | CustomerPrice           |
| DemoTable         | CustomerProductName     |
| DemoTable         | CustomerProductQuantity |
| DemoTable         | Value1                  |
| DemoTable         | Value二                  |
| DemoTable         | FirstName               |
| DemoTable         | LastName                |
| DemoTable         | UserId                  |
| DemoTable         | MonthNumber             |
| DemoTable         | YearNumber              |
| insertcurrentdate | currentDate             |
| student           | first_name              |
| student           | last_name               |
+-------------------+-------------------------+
55 rows in set (0.01 sec)