Override empty_insert clause
No need to implement remove_columns in 4. Check for :text limit to pass test.
Opt-in to another test
Map DECIMALs with zero scale to Types.Integer. Consolidate OID constants.
type_cast for Boolean, Date and DateTime
Implement new columns_for_distinct method
type_cast for Time
Handle index renaming
Connection option cleanup
Test patch update
Switch to SERIAL for :primary_key, implement SchemaCreation
One last test skip
More accurate skip message