Large result sets now always create temporary tables instead of temporary files.

git-svn-id: http://h2database.googlecode.com/svn/trunk@5699 e6896862-9d19-0410-bfb3-e9fa5d50e656
Bugfix for timestamp persistence / transfer

git-svn-id: http://h2database.googlecode.com/svn/trunk@5700 e6896862-9d19-0410-bfb3-e9fa5d50e656
Fixed / improved test cases

git-svn-id: http://h2database.googlecode.com/svn/trunk@5701 e6896862-9d19-0410-bfb3-e9fa5d50e656
Improved error reporting / better tests

git-svn-id: http://h2database.googlecode.com/svn/trunk@5702 e6896862-9d19-0410-bfb3-e9fa5d50e656