exec_cache

# File activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb, line 677
        def exec_cache(sql, name, binds)
          materialize_transactions
          mark_transaction_written_if_write(sql)
          update_typemap_for_default_timezone

          stmt_key = prepare_statement(sql, binds)
          type_casted_binds = type_casted_binds(binds)

          log(sql, name, binds, type_casted_binds, stmt_key) do
            ActiveSupport::Dependencies.interlock.permit_concurrent_loads do
              @connection.exec_prepared(stmt_key, type_casted_binds)
            end
          end
        rescue ActiveRecord::StatementInvalid => e
          raise unless is_cached_plan_failure?(e)

          # Nothing we can do if we are in a transaction because all commands
          # will raise InFailedSQLTransaction
          if in_transaction?
            raise ActiveRecord::PreparedStatementCacheExpired.new(e.cause.message)
          else
            @lock.synchronize do
              # outside of transactions we can simply flush this query and retry
              @statements.delete sql_key(sql)
            end
            retry
          end
        end