Set up docs MCP说明
包含有关 ClickHouse 早期版本中设置变更的信息。
列
type(Enum8('Session' = 0, 'MergeTree' = 1)) — 设置所属的分组 (Session、MergeTree…)version(String) — ClickHouse 服务器版本。changes(Array(Tuple(name String, previous_value String, new_value String, reason String))) — 导致 ClickHouse 行为发生变化的设置变更列表。
示例
SELECT *
FROM system.settings_changes
WHERE version = '23.5'
FORMAT VerticalRow 1:
──────
type: Core
version: 23.5
changes: [('input_format_parquet_preserve_order','1','0','Allow Parquet reader to reorder rows for better parallelism.'),('parallelize_output_from_storages','0','1','Allow parallelism when executing queries that read from file/url/s3/etc. This may reorder rows.'),('use_with_fill_by_sorting_prefix','0','1','Columns preceding WITH FILL columns in ORDER BY clause form sorting prefix. Rows with different values in sorting prefix are filled independently'),('output_format_parquet_compliant_nested_types','0','1','Change an internal field name in output Parquet file schema.')]