Merge 'null_column_regression' into 'trunk'

r8167@Thesaurus (orig r8155):  ribasushi | 2009-12-19 12:50:13 +0100
New branch for null-only-result fix
r8168@Thesaurus (orig r8156):  ribasushi | 2009-12-19 12:51:21 +0100
Failing test
r8322@Thesaurus (orig r8310):  ribasushi | 2010-01-15 00:48:09 +0100
Correct test order
r8323@Thesaurus (orig r8311):  ribasushi | 2010-01-15 01:15:33 +0100
Generalize the to-node inner-join-er to apply to all related_resultset calls, not just counts
r8324@Thesaurus (orig r8312):  ribasushi | 2010-01-15 01:16:05 +0100
Adjust sql-emitter tests
r8326@Thesaurus (orig r8314):  ribasushi | 2010-01-15 01:25:10 +0100
One more sql-test fix and changes