Set up docs MCP説明
以前のClickHouseバージョンでの設定変更に関する情報です。
カラム
type(Enum8('Session' = 0, 'MergeTree' = 1)) — 設定グループ (Session、MergeTree…) 。version(String) — ClickHouseサーバーのバージョン。changes(Array(Tuple(name String, previous_value String, new_value String, reason String))) — ClickHouse の動作を変更した設定変更の一覧。
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.')]