column_names_from_column_numbers

# File activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb, line 1103
          def column_names_from_column_numbers(table_oid, column_numbers)
            Hash[query(<<~SQL, "SCHEMA")].values_at(*column_numbers).compact
              SELECT a.attnum, a.attname
              FROM pg_attribute a
              WHERE a.attrelid = #{table_oid}
              AND a.attnum IN (#{column_numbers.join(", ")})
            SQL
          end