Merge 'trunk' into 'unresolvable_prefetch'

r6910@Thesaurus (orig r6909):  ribasushi | 2009-07-01 13:27:15 +0200
Optimize set_column on uninserted objects
r6921@Thesaurus (orig r6920):  caelum | 2009-07-01 17:40:32 +0200
 r5859@hlagh (orig r6912):  caelum | 2009-07-01 06:21:30 -0700
 new connected() for dbd::sybase users
 r5860@hlagh (orig r6913):  caelum | 2009-07-01 06:25:46 -0700
 add a couple of dbd::sybase reconnection tests
 r5861@hlagh (orig r6914):  caelum | 2009-07-01 06:35:07 -0700
 better connection test
 r5862@hlagh (orig r6915):  caelum | 2009-07-01 06:45:05 -0700
 use dbh->do for connected instead of prepare_cached
 r5863@hlagh (orig r6916):  ribasushi | 2009-07-01 06:55:21 -0700
 Segfault
 r5864@hlagh (orig r6917):  caelum | 2009-07-01 07:03:22 -0700
 use ->do instead of ->prepare_cached in oracle's connected() too
 r5865@hlagh (orig r6918):  caelum | 2009-07-01 08:20:52 -0700
 fix segfault with old DBD::Sybase
 r5866@hlagh (orig r6919):  caelum | 2009-07-01 08:39:18 -0700
 move connection tests into _ping()

r6924@Thesaurus (orig r6923):  ijw | 2009-07-01 19:34:32 +0200
Added a test for a resultset to related-resultset join for 0 related records
r6928@Thesaurus (orig r6927):  ijw | 2009-07-01 20:04:16 +0200
Additional tests on prefetch - illustrates the bug with left-join has_many (NULL row returned) and the one that results from the trivial fix (prefetch gives no artist)
r6932@Thesaurus (orig r6931):  ribasushi | 2009-07-02 08:08:33 +0200
Another candidate for somethingawful.com (fix left join-ed count)
r6934@Thesaurus (orig r6933):  ribasushi | 2009-07-02 09:04:13 +0200
Changelog
r6935@Thesaurus (orig r6934):  ribasushi | 2009-07-02 11:23:48 +0200
cleanup
r6936@Thesaurus (orig r6935):  ijw | 2009-07-02 12:41:01 +0200
Check fetched rows == count for related resultsets
r6937@Thesaurus (orig r6936):  ijw | 2009-07-02 12:43:47 +0200
Confirm prefetch doesn't affect main row fetch, and main row fetch works with and without counting
r6938@Thesaurus (orig r6937):  ribasushi | 2009-07-02 12:52:51 +0200
More fail (fix is known but needs work)
r6939@Thesaurus (orig r6938):  ribasushi | 2009-07-02 13:07:22 +0200
And more fail
r6940@Thesaurus (orig r6939):  ribasushi | 2009-07-02 13:16:46 +0200
These tests are in prefetch/count.t
r6941@Thesaurus (orig r6940):  ribasushi | 2009-07-02 13:38:31 +0200
cleanup
r6942@Thesaurus (orig r6941):  ribasushi | 2009-07-02 13:38:49 +0200
Solve more prefetch inflation crap
r6943@Thesaurus (orig r6942):  ribasushi | 2009-07-02 13:47:41 +0200
Make the code readable
r6944@Thesaurus (orig r6943):  ribasushi | 2009-07-02 15:52:35 +0200
Everything works, just need to fix join-path chaining over search_related (to guard against obscure db quirks)
r6946@Thesaurus (orig r6945):  caelum | 2009-07-02 21:06:32 +0200
add sybase reconnect test
r6948@Thesaurus (orig r6947):  ribasushi | 2009-07-02 22:20:21 +0200
Last part of the join handling puzzle