The changes you make with the MySQL Table Editor are not immediately
applied but are instead queued to be applied in batches after you
have made all your edits.
To apply the changes you have made, click the Apply
Changes button. The Confirm Table
Edit dialog will appear.
Figure 10.4. The Confirm Table Edit Dialog
You can click the Execute button to confirm
the changes and have them applied, or click the
Cancel button to cancel the changes (the
table editor window is redisplayed with your changes intact). You
can also click the Discard Changes button
in the main MySQL Table Editor window to discard all changes you have
made.
You can also copy the proposed changes to the clipboard for
further editing by highlighting the ALTER TABLE or CREATE TABLE
statement, right-clicking and choosing Copy
from the drop-down menu.