diff0:
diff1:
diff2:
nothing:
nulls:
\N	\N	\N	\N
full orig:
1	\N	\N	\N
\N	1	\N	\N
\N	\N	1	\N
\N	\N	\N	\N
full inserted:
1	\N	\N	\N
\N	1	\N	\N
\N	\N	1	\N
\N	\N	\N	\N
diff3: