> ## Documentation Index
> Fetch the complete documentation index at: https://private-7c7dfe99-parallel-read-in-order-multi-part.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Beta 和 Experimental 功能

> ClickHouse 提供 Beta 和 Experimental 功能。本文档页将介绍其定义。

由于 ClickHouse 是开源项目，除了 ClickHouse 员工之外，社区也会贡献大量内容。这些贡献的开发进度往往不尽相同；某些功能可能需要较长的原型验证阶段，或需要更多时间来获得充分的社区反馈并持续迭代，之后才能被视为正式可用 (GA) 。

由于功能在何时会被归类为正式可用并不总是明确，我们将其分为三类：**Beta**、**Experimental** 和 **私有预览**。

**Beta** 功能由 ClickHouse 团队正式支持。**Experimental** 功能则是由 ClickHouse 团队或社区推动的早期原型，不提供正式支持。**私有预览**功能已明确朝着正式可用推进，但适用范围仍然有限，不建议在生产环境中使用。

下文将明确说明 **Beta**、**Experimental** 和**私有预览**功能的特性：

<h2 id="beta-features">
  Beta 功能
</h2>

* 仍在积极开发中，目标是达到正式发布 (GA) 状态
* 可在 GitHub 上跟踪主要已知问题
* 功能后续可能会发生变化
* 可能已在 ClickHouse Cloud 中启用
* ClickHouse 团队为 Beta 功能提供支持

以下是在 ClickHouse Cloud 中被视为 Beta，且可在您的 ClickHouse Cloud 服务中使用的功能。

注意：请务必使用当前版本的 ClickHouse [compatibility](/zh/reference/settings/session-settings/compatibility#compatibility) 设置，以便使用最近引入的功能。

<h2 id="experimental-features">
  Experimental 功能
</h2>

* 可能永远不会 GA
* 可能会被移除
* 可能会引入破坏性变更
* 功能行为可能会发生变化
* 需要显式启用
* ClickHouse 团队**不支持**Experimental 功能
* 可能缺少重要功能和文档
* 无法在 Cloud 中启用

请注意：除上文列为 Beta 的功能外，ClickHouse Cloud 不允许启用任何其他 Experimental 功能。

<h2 id="private-preview-features">
  私有预览功能
</h2>

* 有明确的正式可用 (GA) 路线
* 适用范围仍然有限
* 不建议用于生产环境
* 功能行为可能会发生变化
* 需要显式启用

## Beta 设置

| 名称 | 默认值 |
| - | - |
| [compute\_exact\_num\_defaults\_for\_sparse\_columns](/zh/reference/settings/merge-tree-settings/other#compute_exact_num_defaults_for_sparse_columns) | `1` |
| [packed\_skip\_index\_max\_bytes](/zh/reference/settings/merge-tree-settings/other#packed_skip_index_max_bytes) | `1048576` |
| [framing\_output\_format](/zh/reference/settings/session-settings/other#framing_output_format) | `None` |
| [enable\_join\_transitive\_predicates](/zh/reference/settings/session-settings/enable-join#enable_join_transitive_predicates) | `1` |
| [geotoh3\_argument\_order](/zh/reference/settings/session-settings/other#geotoh3_argument_order) | `lat_lon` |
| [optimize\_trivial\_count\_with\_sparsity\_filter](/zh/reference/settings/session-settings/optimize-trivial#optimize_trivial_count_with_sparsity_filter) | `1` |
| [enable\_lightweight\_update](/zh/reference/settings/session-settings/enable-lightweight#enable_lightweight_update) | `1` |
| [allow\_correlated\_subqueries](/zh/reference/settings/session-settings/allow#allow_correlated_subqueries) | `1` |
| [allow\_delta\_lake\_writes](/zh/reference/settings/session-settings/allow#allow_delta_lake_writes) | `0` |
| [parallel\_replicas\_count](/zh/reference/settings/session-settings/parallel-replicas#parallel_replicas_count) | `0` |
| [parallel\_replica\_offset](/zh/reference/settings/session-settings/parallel#parallel_replica_offset) | `0` |
| [parallel\_replicas\_custom\_key](/zh/reference/settings/session-settings/parallel-replicas#parallel_replicas_custom_key) | \`\` |
| [parallel\_replicas\_custom\_key\_range\_lower](/zh/reference/settings/session-settings/parallel-replicas#parallel_replicas_custom_key_range_lower) | `0` |
| [parallel\_replicas\_custom\_key\_range\_upper](/zh/reference/settings/session-settings/parallel-replicas#parallel_replicas_custom_key_range_upper) | `0` |
| [parallel\_replicas\_filter\_pushdown](/zh/reference/settings/session-settings/parallel-replicas#parallel_replicas_filter_pushdown) | `0` |
| [parallel\_replicas\_allow\_view\_over\_mergetree](/zh/reference/settings/session-settings/parallel-replicas#parallel_replicas_allow_view_over_mergetree) | `0` |
| [allow\_database\_iceberg](/zh/reference/settings/session-settings/allow#allow_database_iceberg) | `0` |
| [allow\_database\_unity\_catalog](/zh/reference/settings/session-settings/allow#allow_database_unity_catalog) | `0` |
| [allow\_database\_glue\_catalog](/zh/reference/settings/session-settings/allow#allow_database_glue_catalog) | `0` |
| [session\_timezone](/zh/reference/settings/session-settings/other#session_timezone) | \`\` |
| [low\_priority\_query\_wait\_time\_ms](/zh/reference/settings/session-settings/other#low_priority_query_wait_time_ms) | `1000` |
| [enable\_json\_lazy\_type\_hints](/zh/reference/settings/session-settings/enable#enable_json_lazy_type_hints) | `0` |
| [ai\_function\_request\_timeout\_sec](/zh/reference/settings/session-settings/ai-function#ai_function_request_timeout_sec) | `60` |
| [ai\_function\_max\_retries](/zh/reference/settings/session-settings/ai-function#ai_function_max_retries) | `1` |
| [ai\_function\_retry\_initial\_delay\_ms](/zh/reference/settings/session-settings/ai-function#ai_function_retry_initial_delay_ms) | `1000` |
| [ai\_function\_throw\_on\_error](/zh/reference/settings/session-settings/ai-function#ai_function_throw_on_error) | `1` |
| [ai\_function\_max\_input\_tokens\_per\_query](/zh/reference/settings/session-settings/ai-function#ai_function_max_input_tokens_per_query) | `1000000` |
| [ai\_function\_max\_output\_tokens\_per\_query](/zh/reference/settings/session-settings/ai-function#ai_function_max_output_tokens_per_query) | `500000` |
| [ai\_function\_max\_api\_calls\_per\_query](/zh/reference/settings/session-settings/ai-function#ai_function_max_api_calls_per_query) | `1000` |
| [ai\_function\_throw\_on\_quota\_exceeded](/zh/reference/settings/session-settings/ai-function#ai_function_throw_on_quota_exceeded) | `1` |
| [ai\_function\_embedding\_max\_batch\_size](/zh/reference/settings/session-settings/ai-function#ai_function_embedding_max_batch_size) | `100` |
| [ai\_function\_text\_default\_credentials](/zh/reference/settings/session-settings/ai-function#ai_function_text_default_credentials) | \`\` |
| [ai\_function\_embedding\_default\_credentials](/zh/reference/settings/session-settings/ai-function#ai_function_embedding_default_credentials) | \`\` |
| [ai\_function\_allow\_insecure\_endpoint](/zh/reference/settings/session-settings/ai-function#ai_function_allow_insecure_endpoint) | `0` |
| [enable\_alp\_codec](/zh/reference/settings/session-settings/enable#enable_alp_codec) | `0` |
| [allow\_delta\_kernel\_rs](/zh/reference/settings/session-settings/allow#allow_delta_kernel_rs) | `1` |
| [allow\_insert\_into\_iceberg](/zh/reference/settings/session-settings/allow#allow_insert_into_iceberg) | `0` |
| [cascades\_aggregation\_pushdown](/zh/reference/settings/session-settings/other#cascades_aggregation_pushdown) | `1` |

## Experimental 设置

| 名称 | 默认值 |
| - | - |
| [allow\_commit\_order\_projection](/zh/reference/settings/merge-tree-settings/allow#allow_commit_order_projection) | `0` |
| [allow\_experimental\_replacing\_merge\_with\_cleanup](/zh/reference/settings/merge-tree-settings/allow-experimental#allow_experimental_replacing_merge_with_cleanup) | `0` |
| [allow\_experimental\_text\_index\_phrase\_search](/zh/reference/settings/merge-tree-settings/allow-experimental#allow_experimental_text_index_phrase_search) | `0` |
| [allow\_remote\_fs\_zero\_copy\_replication](/zh/reference/settings/merge-tree-settings/allow#allow_remote_fs_zero_copy_replication) | `0` |
| [distributed\_index\_analysis\_min\_indexes\_bytes\_to\_activate](/zh/reference/settings/merge-tree-settings/distributed-index#distributed_index_analysis_min_indexes_bytes_to_activate) | `1073741824` |
| [distributed\_index\_analysis\_min\_parts\_to\_activate](/zh/reference/settings/merge-tree-settings/distributed-index#distributed_index_analysis_min_parts_to_activate) | `10` |
| [enable\_adaptive\_codec\_selection](/zh/reference/settings/merge-tree-settings/enable#enable_adaptive_codec_selection) | `0` |
| [enable\_replacing\_merge\_with\_cleanup\_for\_min\_age\_to\_force\_merge](/zh/reference/settings/merge-tree-settings/enable#enable_replacing_merge_with_cleanup_for_min_age_to_force_merge) | `0` |
| [force\_read\_through\_cache\_for\_merges](/zh/reference/settings/merge-tree-settings/other#force_read_through_cache_for_merges) | `0` |
| [merge\_selector\_algorithm](/zh/reference/settings/merge-tree-settings/merge-selector#merge_selector_algorithm) | `Simple` |
| [merge\_selector\_heuristic\_to\_lower\_max\_parts\_to\_merge\_at\_once\_exponent](/zh/reference/settings/merge-tree-settings/merge-selector#merge_selector_heuristic_to_lower_max_parts_to_merge_at_once_exponent) | `5` |
| [notify\_newest\_block\_number](/zh/reference/settings/merge-tree-settings/other#notify_newest_block_number) | `0` |
| [part\_moves\_between\_shards\_delay\_seconds](/zh/reference/settings/merge-tree-settings/part-moves#part_moves_between_shards_delay_seconds) | `30` |
| [part\_moves\_between\_shards\_enable](/zh/reference/settings/merge-tree-settings/part-moves#part_moves_between_shards_enable) | `0` |
| [remote\_fs\_zero\_copy\_path\_compatible\_mode](/zh/reference/settings/merge-tree-settings/remote-fs#remote_fs_zero_copy_path_compatible_mode) | `0` |
| [remote\_fs\_zero\_copy\_zookeeper\_path](/zh/reference/settings/merge-tree-settings/remote-fs#remote_fs_zero_copy_zookeeper_path) | `/clickhouse/zero_copy` |
| [remove\_rolled\_back\_parts\_immediately](/zh/reference/settings/merge-tree-settings/remove#remove_rolled_back_parts_immediately) | `1` |
| [use\_reader\_executor](/zh/reference/settings/session-settings/use#use_reader_executor) | `0` |
| [reader\_executor\_use\_long\_connections](/zh/reference/settings/session-settings/reader-executor#reader_executor_use_long_connections) | `0` |
| [reader\_executor\_min\_bytes\_for\_seek](/zh/reference/settings/session-settings/reader-executor#reader_executor_min_bytes_for_seek) | `2097152` |
| [reader\_executor\_max\_tail\_for\_drain](/zh/reference/settings/session-settings/reader-executor#reader_executor_max_tail_for_drain) | `1048576` |
| [reader\_executor\_window\_size](/zh/reference/settings/session-settings/reader-executor#reader_executor_window_size) | `8388608` |
| [reader\_executor\_block\_size](/zh/reference/settings/session-settings/reader-executor#reader_executor_block_size) | `1048576` |
| [group\_by\_top\_k\_optimization\_observation\_rows](/zh/reference/settings/session-settings/group-by#group_by_top_k_optimization_observation_rows) | `65536` |
| [query\_plan\_optimize\_join\_order\_max\_searched\_plans](/zh/reference/settings/session-settings/query-plan#query_plan_optimize_join_order_max_searched_plans) | `100000` |
| [query\_plan\_optimize\_join\_order\_randomize](/zh/reference/settings/session-settings/query-plan#query_plan_optimize_join_order_randomize) | `0` |
| [ast\_fuzzer\_runs](/zh/reference/settings/session-settings/ast-fuzzer#ast_fuzzer_runs) | `0` |
| [ast\_fuzzer\_any\_query](/zh/reference/settings/session-settings/ast-fuzzer#ast_fuzzer_any_query) | `0` |
| [ast\_fuzzer\_oracle](/zh/reference/settings/session-settings/ast-fuzzer#ast_fuzzer_oracle) | `0` |
| [allow\_fuzz\_query\_functions](/zh/reference/settings/session-settings/allow#allow_fuzz_query_functions) | `0` |
| [reserve\_memory](/zh/reference/settings/session-settings/other#reserve_memory) | `0` |
| [resumable\_backup\_from\_snapshot](/zh/reference/settings/session-settings/other#resumable_backup_from_snapshot) | `0` |
| [allow\_url\_wildcard\_from\_index\_pages](/zh/reference/settings/session-settings/allow#allow_url_wildcard_from_index_pages) | `0` |
| [enable\_materialized\_cte](/zh/reference/settings/session-settings/enable#enable_materialized_cte) | `0` |
| [analyzer\_inline\_views](/zh/reference/settings/session-settings/other#analyzer_inline_views) | `0` |
| [allow\_kafka\_offsets\_storage\_in\_keeper](/zh/reference/settings/session-settings/allow#allow_kafka_offsets_storage_in_keeper) | `0` |
| [automatic\_parallel\_replicas\_mode](/zh/reference/settings/session-settings/automatic-parallel#automatic_parallel_replicas_mode) | `0` |
| [automatic\_parallel\_replicas\_min\_bytes\_per\_replica](/zh/reference/settings/session-settings/automatic-parallel#automatic_parallel_replicas_min_bytes_per_replica) | `1048576` |
| [parallel\_replicas\_plan\_based](/zh/reference/settings/session-settings/parallel-replicas#parallel_replicas_plan_based) | `0` |
| [parallel\_replicas\_allow\_merge\_tables](/zh/reference/settings/session-settings/parallel-replicas#parallel_replicas_allow_merge_tables) | `0` |
| [distributed\_index\_analysis](/zh/reference/settings/session-settings/distributed-index-analysis#distributed_index_analysis) | `0` |
| [enable\_materialized\_postgresql\_table](/zh/reference/settings/session-settings/enable#enable_materialized_postgresql_table) | `0` |
| [enable\_funnel\_functions](/zh/reference/settings/session-settings/enable#enable_funnel_functions) | `0` |
| [allow\_experimental\_nlp\_functions](/zh/reference/settings/session-settings/allow-experimental#allow_experimental_nlp_functions) | `0` |
| [allow\_experimental\_hash\_functions](/zh/reference/settings/session-settings/allow-experimental#allow_experimental_hash_functions) | `0` |
| [unique\_key\_max\_encoded\_size](/zh/reference/settings/session-settings/unique-key#unique_key_max_encoded_size) | `256` |
| [unique\_key\_probe\_implementation](/zh/reference/settings/session-settings/unique-key#unique_key_probe_implementation) | `auto` |
| [enable\_unique\_key](/zh/reference/settings/session-settings/enable#enable_unique_key) | `0` |
| [enable\_quantized\_codec](/zh/reference/settings/session-settings/enable#enable_quantized_codec) | `0` |
| [enable\_sz3\_codec](/zh/reference/settings/session-settings/enable#enable_sz3_codec) | `0` |
| [enable\_zxc\_codec](/zh/reference/settings/session-settings/enable#enable_zxc_codec) | `0` |
| [throw\_on\_unsupported\_query\_inside\_transaction](/zh/reference/settings/session-settings/throw-on#throw_on_unsupported_query_inside_transaction) | `1` |
| [wait\_changes\_become\_visible\_after\_commit\_mode](/zh/reference/settings/session-settings/other#wait_changes_become_visible_after_commit_mode) | `wait_unknown` |
| [implicit\_transaction](/zh/reference/settings/session-settings/implicit#implicit_transaction) | `0` |
| [grace\_hash\_join\_initial\_buckets](/zh/reference/settings/session-settings/grace-hash#grace_hash_join_initial_buckets) | `1` |
| [grace\_hash\_join\_max\_buckets](/zh/reference/settings/session-settings/grace-hash#grace_hash_join_max_buckets) | `1024` |
| [join\_to\_sort\_minimum\_perkey\_rows](/zh/reference/settings/session-settings/join-to#join_to_sort_minimum_perkey_rows) | `40` |
| [join\_to\_sort\_maximum\_table\_rows](/zh/reference/settings/session-settings/join-to#join_to_sort_maximum_table_rows) | `10000` |
| [allow\_join\_right\_table\_sorting](/zh/reference/settings/session-settings/allow#allow_join_right_table_sorting) | `0` |
| [enable\_streaming\_queries](/zh/reference/settings/session-settings/enable#enable_streaming_queries) | `0` |
| [stop\_refreshable\_materialized\_views\_on\_startup](/zh/reference/settings/session-settings/other#stop_refreshable_materialized_views_on_startup) | `0` |
| [allow\_experimental\_database\_materialized\_postgresql](/zh/reference/settings/session-settings/allow-experimental#allow_experimental_database_materialized_postgresql) | `0` |
| [allow\_experimental\_database\_hms\_catalog](/zh/reference/settings/session-settings/allow-experimental#allow_experimental_database_hms_catalog) | `0` |
| [allow\_experimental\_kusto\_dialect](/zh/reference/settings/session-settings/allow-experimental#allow_experimental_kusto_dialect) | `0` |
| [allow\_experimental\_prql\_dialect](/zh/reference/settings/session-settings/allow-experimental#allow_experimental_prql_dialect) | `0` |
| [allow\_experimental\_polyglot\_dialect](/zh/reference/settings/session-settings/allow-experimental#allow_experimental_polyglot_dialect) | `0` |
| [enable\_json\_ast\_dialect](/zh/reference/settings/session-settings/enable#enable_json_ast_dialect) | `0` |
| [polyglot\_dialect](/zh/reference/settings/session-settings/other#polyglot_dialect) | \`\` |
| [enable\_trino\_dialect](/zh/reference/settings/session-settings/enable#enable_trino_dialect) | `0` |
| [enable\_adaptive\_memory\_spill\_scheduler](/zh/reference/settings/session-settings/enable#enable_adaptive_memory_spill_scheduler) | `0` |
| [allow\_delta\_lake\_create\_table](/zh/reference/settings/session-settings/allow#allow_delta_lake_create_table) | `0` |
| [allow\_experimental\_cleanup\_old\_data\_files\_compaction](/zh/reference/settings/session-settings/allow-experimental#allow_experimental_cleanup_old_data_files_compaction) | `0` |
| [allow\_experimental\_iceberg\_compaction](/zh/reference/settings/session-settings/allow-experimental#allow_experimental_iceberg_compaction) | `0` |
| [iceberg\_manifest\_min\_count\_to\_compact](/zh/reference/settings/session-settings/iceberg#iceberg_manifest_min_count_to_compact) | `100` |
| [allow\_iceberg\_remove\_orphan\_files](/zh/reference/settings/session-settings/allow#allow_iceberg_remove_orphan_files) | `0` |
| [iceberg\_orphan\_files\_older\_than\_seconds](/zh/reference/settings/session-settings/iceberg#iceberg_orphan_files_older_than_seconds) | `259200` |
| [allow\_experimental\_expire\_snapshots](/zh/reference/settings/session-settings/allow-experimental#allow_experimental_expire_snapshots) | `0` |
| [write\_full\_path\_in\_iceberg\_metadata](/zh/reference/settings/session-settings/other#write_full_path_in_iceberg_metadata) | `0` |
| [iceberg\_metadata\_compression\_method](/zh/reference/settings/session-settings/iceberg-metadata#iceberg_metadata_compression_method) | \`\` |
| [distributed\_plan\_execute\_locally](/zh/reference/settings/session-settings/distributed-plan#distributed_plan_execute_locally) | `0` |
| [distributed\_plan\_default\_shuffle\_join\_bucket\_count](/zh/reference/settings/session-settings/distributed-plan#distributed_plan_default_shuffle_join_bucket_count) | `8` |
| [distributed\_plan\_default\_reader\_bucket\_count](/zh/reference/settings/session-settings/distributed-plan#distributed_plan_default_reader_bucket_count) | `8` |
| [distributed\_plan\_force\_exchange\_kind](/zh/reference/settings/session-settings/distributed-plan#distributed_plan_force_exchange_kind) | \`\` |
| [distributed\_plan\_max\_rows\_to\_broadcast](/zh/reference/settings/session-settings/distributed-plan#distributed_plan_max_rows_to_broadcast) | `20000` |
| [distributed\_plan\_read\_in\_order](/zh/reference/settings/session-settings/distributed-plan#distributed_plan_read_in_order) | `0` |
| [allow\_experimental\_ytsaurus\_table\_engine](/zh/reference/settings/session-settings/allow-experimental#allow_experimental_ytsaurus_table_engine) | `0` |
| [allow\_experimental\_ytsaurus\_table\_function](/zh/reference/settings/session-settings/allow-experimental#allow_experimental_ytsaurus_table_function) | `0` |
| [allow\_experimental\_ytsaurus\_dictionary\_source](/zh/reference/settings/session-settings/allow-experimental#allow_experimental_ytsaurus_dictionary_source) | `0` |
| [distributed\_plan\_force\_shuffle\_aggregation](/zh/reference/settings/session-settings/distributed-plan#distributed_plan_force_shuffle_aggregation) | `0` |
| [enable\_cascades\_optimizer](/zh/reference/settings/session-settings/enable#enable_cascades_optimizer) | `0` |
| [rewrite\_in\_to\_join](/zh/reference/settings/session-settings/rewrite#rewrite_in_to_join) | `0` |
| [allow\_experimental\_paimon\_storage\_engine](/zh/reference/settings/session-settings/allow-experimental#allow_experimental_paimon_storage_engine) | `0` |
| [paimon\_target\_snapshot\_id](/zh/reference/settings/session-settings/other#paimon_target_snapshot_id) | `-1` |
| [max\_consume\_snapshots](/zh/reference/settings/session-settings/max#max_consume_snapshots) | `0` |
| [use\_paimon\_partition\_pruning](/zh/reference/settings/session-settings/use-paimon#use_paimon_partition_pruning) | `0` |
| [allow\_experimental\_object\_storage\_queue\_hive\_partitioning](/zh/reference/settings/session-settings/allow-experimental#allow_experimental_object_storage_queue_hive_partitioning) | `0` |
| [query\_plan\_optimize\_join\_order\_algorithm](/zh/reference/settings/session-settings/query-plan#query_plan_optimize_join_order_algorithm) | `greedy` |
| [query\_plan\_optimize\_join\_order\_conflict\_detector](/zh/reference/settings/session-settings/query-plan#query_plan_optimize_join_order_conflict_detector) | \`\` |
| [allow\_experimental\_database\_paimon\_rest\_catalog](/zh/reference/settings/session-settings/allow-experimental#allow_experimental_database_paimon_rest_catalog) | `0` |
| [webassembly\_udf\_max\_fuel](/zh/reference/settings/session-settings/webassembly-udf#webassembly_udf_max_fuel) | `100000` |
| [webassembly\_udf\_max\_memory](/zh/reference/settings/session-settings/webassembly-udf#webassembly_udf_max_memory) | `134217728` |
| [webassembly\_udf\_max\_input\_block\_size](/zh/reference/settings/session-settings/webassembly-udf#webassembly_udf_max_input_block_size) | `0` |
| [webassembly\_udf\_input\_split\_memory\_ratio](/zh/reference/settings/session-settings/webassembly-udf#webassembly_udf_input_split_memory_ratio) | `0.5` |
| [webassembly\_udf\_max\_instances](/zh/reference/settings/session-settings/webassembly-udf#webassembly_udf_max_instances) | `32` |
| [allow\_experimental\_eval\_table\_function](/zh/reference/settings/session-settings/allow-experimental#allow_experimental_eval_table_function) | `0` |

## 私有预览设置

| 名称 | 默认值 |
| - | - |
| [enable\_time\_series\_table](/zh/reference/settings/session-settings/enable#enable_time_series_table) | `0` |
| [time\_series\_prefer\_recent\_samples\_table](/zh/reference/settings/session-settings/other#time_series_prefer_recent_samples_table) | `1` |
| [make\_distributed\_plan](/zh/reference/settings/session-settings/other#make_distributed_plan) | `0` |
| [distributed\_plan\_workers\_num](/zh/reference/settings/session-settings/distributed-plan#distributed_plan_workers_num) | `0` |
| [distributed\_plan\_workers\_provisioning\_timeout\_ms](/zh/reference/settings/session-settings/distributed-plan#distributed_plan_workers_provisioning_timeout_ms) | `10000` |
| [distributed\_plan\_prefer\_replicas\_over\_workers](/zh/reference/settings/session-settings/distributed-plan#distributed_plan_prefer_replicas_over_workers) | `0` |
| [enable\_time\_series\_aggregate\_functions](/zh/reference/settings/session-settings/enable#enable_time_series_aggregate_functions) | `0` |
| [promql\_database](/zh/reference/settings/session-settings/promql#promql_database) | \`\` |
| [promql\_table](/zh/reference/settings/session-settings/promql#promql_table) | \`\` |
| [promql\_evaluation\_time](/zh/reference/settings/session-settings/promql#promql_evaluation_time) | `auto` |