2011

NOTE This functionality is for geospatial features only. For information about
saving changes back to attached drawing files, see
Setting Save Back Options
(page 763).
When Update Edits Automatically is off (the default), your changes remain
local until you check them in.
If you turn on Update Edits Automatically, AutoCAD Map 3D immediately
attempts to save any edits you have made to checked-out features back to the
feature source. If updating fails for any reason, the setting remains off. You
can reverse the changes you made (so your version matches the one that is
checked in), or check out the drawing, re-enter your edits and then check it
in.
NOTE Undo does not reverse this command. Canceling a checkout will not discard
changes or restore features to their state before the checkout.
You can change the default setting (page 84) for Update Edits Automatically.
When you create layers for SHP and SDF data, AutoCAD Map 3D may create
a local cache the first time you edit those layers. For large files this may be
time-consuming. To avoid this, turn on Update Edits Automatically for large
SDF and SHP files.
Persistent Locking
If the feature source provider supports
persistent locking (page 2070), and Update
Edits Automatically is on, checking out a feature locks that feature; checking
in a feature unlocks it. You can release locks on features by checking them
out (if you are the user who locked them) and then checking them back in.
If the feature source provider supports persistent locking and Update Edits
Automatically is off, use Cancel Checkout to unlock features without saving
your changes to them. When you do this, you synchronize the state of the
feature you checked out with those in the feature source. That is, you delete
new features created locally, and replace locally modified or deleted features
with the versions from the feature source.
Revision Numbers
Some providers (for example, Oracle, SQL Server, and MySQL) support revision
numbers, which increment a numeric value in the feature every time you
commit a change to that feature in the feature source. This allows AutoCAD
Map 3D to see if a feature has been edited by another user. If another user
modifies a feature while you have it checked out, a revision-number conflict
can occur. This might happen if you check out the feature while you are
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