def primary_keys(table)
      if self.class.lowercase_schema_reflection
        @connection.primary_keys(table).map do |key|
          key.downcase
        end
      else
        @connection.primary_keys(table)
      end
    end
def primary_keys(table)
      if self.class.lowercase_schema_reflection
        @connection.primary_keys(table).map do |key|
          key.downcase
        end
      else
        @connection.primary_keys(table)
      end
    end
- begin_db_transaction
- commit_db_transaction
- rollback_db_transaction
- begin_isolated_db_transaction
- supports_transaction_isolation?
- write_large_object
- pk_and_sequence_for
- primary_key
- primary_keys