// Check whether we're out of sindex range.
         ql::datum_t sindex_val; // NULL if no sindex.
         if (sindex) {
            // Secondary index functions are deterministic (so no need for an
            // rdb_context_t) and evaluated in a pristine environment (without global
            // optargs).
            ql::env_t sindex_env(job.env->interruptor,
                                 ql::return_empty_normal_batches_t::NO,
                                 sindex->func_reql_version);
            sindex_val = sindex->func->call(&sindex_env, val)->as_datum();
            if (sindex->multi == sindex_multi_bool_t::MULTI
                && sindex_val.get_type() == ql::datum_t::R_ARRAY) {
                boost::optional<uint64_t> tag = *ql::datum_t::extract_tag(key);
                guarantee(tag);
                sindex_val = sindex_val.get(*tag, ql::NOTHROW);
                guarantee(sindex_val.has());
            }
            if (!sindex->range.contains(sindex_val)) {
                return continue_bool_t::CONTINUE;
            }
         }