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1. Solve the problem of not having TOAST references hiding inside composite values by establishing the rule that toasting only goes one level deep: a tuple can contain toasted fields, but a composite-type datum that is to be inserted into a tuple cannot. Enforcing this in heap_formtuple is relatively cheap and it avoids a large increase in the cost of running the tuptoaster during final storage of a row. 2. Fix some interesting problems in expansion of inherited queries that reference whole-row variables. We never really did this correctly before, but it's now relatively painless to solve by expanding the parent's whole-row Var into a RowExpr() selecting the proper columns from the child. If you dike out the preventive check in CheckAttributeType(), composite-type columns now seem to actually work. However, we surely cannot ship them like this --- without I/O for composite types, you can't get pg_dump to dump tables containing them. So a little more work still to do.