ActiveRecord::ConnectionAdapters::PostgreSQL::DatabaseStatements

# File activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb, line 134
        def build_explain_clause(options = [])
          return "EXPLAIN" if options.empty?

          "EXPLAIN (#{options.join(", ").upcase})"
        end

# File activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb, line 7
        def explain(arel, binds = [], options = [])
          sql    = build_explain_clause(options) + " " + to_sql(arel, binds)
          result = internal_exec_query(sql, "EXPLAIN", binds)
          PostgreSQL::ExplainPrettyPrinter.new.pp(result)
        end

# File activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb, line 130
        def high_precision_current_timestamp
          HIGH_PRECISION_CURRENT_TIMESTAMP
        end

# File activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb, line 53
        def raw_execute(sql, name, async: false, allow_retry: false, materialize_transactions: true)
          log(sql, name, async: async) do |notification_payload|
            with_raw_connection(allow_retry: allow_retry, materialize_transactions: materialize_transactions) do |conn|
              result = conn.async_exec(sql)
              verified!
              handle_warnings(result)
              notification_payload[:row_count] = result.count
              result
            end
          end
        end

# File activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb, line 148
        def set_constraints(deferred, *constraints)
          unless %i[deferred immediate].include?(deferred)
            raise ArgumentError, "deferred must be :deferred or :immediate"
          end

          constraints = if constraints.empty?
            "ALL"
          else
            constraints.map { |c| quote_table_name(c) }.join(", ")
          end
          execute("SET CONSTRAINTS #{constraints} #{deferred.to_s.upcase}")
        end