tree c6fe69c8b357110c74f6577e1869e323574504f2
parent dfb1bd12de75b9a9c181f8a5410ea0e847bc1c6f
author Shawn O. Pearce <sop@google.com> 1319831577 -0700
committer Shawn O. Pearce <sop@google.com> 1319831577 -0700

Replace autoflush with basic entity group transaction support

As an optional feature the database may implement entity group
transaction semantics, where a transaction can be started on a
single root entity (e.g. a Change object in Gerrit Code Review),
reads or updates applied, and later the transaction committed.
This feature better supports a database like Google AppEngine
where the entity group transactions are relatively slow.

Change-Id: I740dfbf6902e403347fd1838aee83271500e0c30