Beta 版和实验性功能

由于 ClickHouse 是开源的，它不仅来自 ClickHouse 员工，还来自社区的许多贡献。这些贡献通常以不同的速度开发；某些功能可能需要漫长的原型设计阶段，或者需要更多的时间来获得足够的社区反馈和迭代，才能被认为是通用可用 (GA) 的。

由于不确定功能何时被归类为通用可用，我们将功能分为两类：Beta 版 和 实验性。

Beta 版 功能由 ClickHouse 团队正式支持。实验性 功能是由 ClickHouse 团队或社区驱动的早期原型，不提供官方支持。

以下部分明确描述了 Beta 版 和 实验性 功能的属性

Beta 版功能

• 正在积极开发以使其通用可用 (GA)
• 主要已知问题可以在 GitHub 上跟踪
• 功能在未来可能会更改
• 可能在 ClickHouse Cloud 中启用
• ClickHouse 团队支持 Beta 版功能

您可以在下面找到在 ClickHouse Cloud 中被认为是 Beta 版的功能，并且可以在您的 ClickHouse Cloud 服务中使用。

注意：请确保使用最新的 ClickHouse 兼容性 设置，以使用最近引入的功能。

实验性功能

• 可能永远不会成为 GA
• 可能会被移除
• 可能会引入破坏性更改
• 功能在未来可能会更改
• 需要明确启用
• ClickHouse 团队不支持实验性功能
• 可能缺乏重要的功能和文档
• 无法在云端启用

请注意：除了上述列为 Beta 版的功能外，不允许在 ClickHouse Cloud 中启用其他实验性功能。

Beta 版设置

名称	默认值
geotoh3_argument_order	lat_lon
enable_lightweight_update	1
allow_experimental_correlated_subqueries	1
parallel_replicas_count	0
parallel_replica_offset	0
parallel_replicas_custom_key	``
parallel_replicas_custom_key_range_lower	0
parallel_replicas_custom_key_range_upper	0
parallel_replicas_filter_pushdown	0
allow_experimental_database_iceberg	0
allow_experimental_database_unity_catalog	0
allow_experimental_database_glue_catalog	0
session_timezone	``
low_priority_query_wait_time_ms	1000
allow_statistics_optimize	1
use_statistics	1
use_statistics_cache	1
enable_full_text_index	0
allow_experimental_delta_kernel_rs	1
enable_join_runtime_filters	1

实验性设置

名称	默认值
allow_experimental_replacing_merge_with_cleanup	0
allow_experimental_reverse_key	0
allow_remote_fs_zero_copy_replication	0
distributed_index_analysis_min_indexes_bytes_to_activate	1073741824
distributed_index_analysis_min_parts_to_activate	10
enable_replacing_merge_with_cleanup_for_min_age_to_force_merge	0
force_read_through_cache_for_merges	0
merge_selector_algorithm	Simple
merge_selector_enable_heuristic_to_lower_max_parts_to_merge_at_once	0
merge_selector_heuristic_to_lower_max_parts_to_merge_at_once_exponent	5
notify_newest_block_number	0
part_moves_between_shards_delay_seconds	30
part_moves_between_shards_enable	0
remote_fs_zero_copy_path_compatible_mode	0
remote_fs_zero_copy_zookeeper_path	/clickhouse/zero_copy
remove_rolled_back_parts_immediately	1
shared_merge_tree_virtual_parts_discovery_batch	1
allow_experimental_kafka_offsets_storage_in_keeper	0
allow_experimental_delta_lake_writes	0
automatic_parallel_replicas_mode	0
automatic_parallel_replicas_min_bytes_per_replica	1048576
distributed_index_analysis	0
allow_experimental_materialized_postgresql_table	0
allow_experimental_funnel_functions	0
allow_experimental_nlp_functions	0
allow_experimental_hash_functions	0
allow_experimental_time_series_table	0
allow_experimental_codecs	0
throw_on_unsupported_query_inside_transaction	1
wait_changes_become_visible_after_commit_mode	wait_unknown
implicit_transaction	0
grace_hash_join_initial_buckets	1
grace_hash_join_max_buckets	1024
join_to_sort_minimum_perkey_rows	40
join_to_sort_maximum_table_rows	10000
allow_experimental_join_right_table_sorting	0
allow_experimental_statistics	0
allow_experimental_window_view	0
window_view_clean_interval	60
window_view_heartbeat_interval	15
wait_for_window_view_fire_signal_timeout	10
stop_refreshable_materialized_views_on_startup	0
allow_experimental_database_materialized_postgresql	0
allow_experimental_nullable_tuple_type	0
allow_experimental_query_deduplication	0
allow_experimental_database_hms_catalog	0
allow_experimental_kusto_dialect	0
allow_experimental_prql_dialect	0
enable_adaptive_memory_spill_scheduler	0
allow_experimental_insert_into_iceberg	0
allow_experimental_iceberg_compaction	0
write_full_path_in_iceberg_metadata	0
iceberg_metadata_compression_method	``
make_distributed_plan	0
distributed_plan_execute_locally	0
distributed_plan_default_shuffle_join_bucket_count	8
distributed_plan_default_reader_bucket_count	8
distributed_plan_force_exchange_kind	``
distributed_plan_max_rows_to_broadcast	20000
allow_experimental_ytsaurus_table_engine	0
allow_experimental_ytsaurus_table_function	0
allow_experimental_ytsaurus_dictionary_source	0
distributed_plan_force_shuffle_aggregation	0
join_runtime_filter_exact_values_limit	10000
join_runtime_bloom_filter_bytes	524288
join_runtime_bloom_filter_hash_functions	3
join_runtime_filter_pass_ratio_threshold_for_disabling	0.7
join_runtime_filter_blocks_to_skip_before_reenabling	30
join_runtime_bloom_filter_max_ratio_of_set_bits	0.7
rewrite_in_to_join	0
allow_experimental_time_series_aggregate_functions	0
promql_database	``
promql_table	``
promql_evaluation_time	auto
allow_experimental_alias_table_engine	0
use_paimon_partition_pruning	0
allow_experimental_object_storage_queue_hive_partitioning	0
query_plan_optimize_join_order_algorithm	greedy
allow_experimental_database_paimon_rest_catalog	0