0.12.3dev: Follow-up to [10792], work around MySQL ERROR 1093 with the same table for the update target and the subquery FROM clause.
0.12.3dev: Follow-up to [10792], work around MySQL ERROR 1093 with the same table for the update target and the subquery FROM clause.


git-svn-id: 7bda06b145a4a8e9a7f4be07d7c3eb82923a12d6@10803 af82e41b-90c4-0310-8c96-b1721e28e2e2

jun66j5/trac-ja,jun66j5/trac-ja,walty8/trac,walty8/trac,jun66j5/trac-ja,walty8/trac,netjunki/trac-Pygit2,netjunki/trac-Pygit2,netjunki/trac-Pygit2,walty8/trac,jun66j5/trac-ja