POINT limitation

Author: Shlomi Noach

doc/requirements-and-limitations.md

@@ -28,6 +28,8 @@ The `SUPER` privilege is required for `STOP SLAVE`, `START SLAVE` operations. Th
 
 - MySQL 5.7 generated columns are not supported. They may be supported in the future.
 
+- MySQL 5.7 `POINT` column type is not supported.
+
 - MySQL 5.7 `JSON` columns are supported but not as part of `PRIMARY KEY`
 
 - The two _before_ & _after_ tables must share a `PRIMARY KEY` or other `UNIQUE KEY`. This key will be used by `gh-ost` to iterate through the table rows when copying. [Read more](shared-key.md)