tree 9e196a28cabb12a12bca2d166ff3b2bf7fb382a8
parent 6c0ab8e6d97d6a88aea44ec3f7acaf3b00aaecbe
author Shawn O. Pearce <sop@google.com> 1227564294 -0800
committer Shawn O. Pearce <sop@google.com> 1227565553 -0800

Add support for RowVersion columns for optimistic locking

The row version is necessary to implement optimistic locking at the
application level, where an entity is read and then later updated.
If the row version differs in the data store we know that changes
were made.

Signed-off-by: Shawn O. Pearce <sop@google.com>