As an example, the first mismatched table is aggregator_feed. The
comparison report translates as: "Table aggregator_feed has a column
named 'description'. hook_schema for this table says the column has
no default value but the actual database column has a default value of
''." Sure enough, if you look at the mysql and pgsql CREATE TABLE
statements, you will see that mysql's (which is what was used to
create the "declared" structure) has no default while pgsql's (which
is what was used to create the "actual" structure) has one.