DATASET · ref

量化交易所会话日历

ref.quant_exchange_session_calendar

标的与映射

这是证券主数据、交易日历与跨来源映射中的“量化交易所会话日历”数据集；一行由 calendar_id、exchange、source_version、session_index 定位，主要字段包括 record_id、timezone、coverage_start、coverage_end、expected_session_count。

下载本类 JSON 下载完整 JSON.gz 先获取 Key

字段36

关键字段5

更新口径producer_schedule

时间列created_at

单页上限5000

分页Cursor

PIT不支持

规模<1K

WHAT IT ANSWERS

这张表适合回答什么

解析证券与来源标识映射
为跨表查询补充分类和主数据

GRAIN & TIME

一行代表什么

业务粒度: 每行代表“量化交易所会话日历”的一条记录；逻辑粒度由 calendar_id × exchange × source_version × session_index × record_id 共同确定。
时间口径: 以 created_at 为主要查询时间轴；除下方限制特别说明外，时间戳按 UTC、日期按来源市场日历解释。
更新节奏: 由对应生产任务或事件触发更新，不承诺固定日历频率；查询前先检查最新时间。

KEY FIELDS

先看这些字段

calendar_id: 用于识别 calendar 的业务标识。
exchange: 上市或交易场所。
source_version: 用于确定该表业务粒度或默认顺序的 source version 字段。
session_index: 用于确定该表业务粒度或默认顺序的 session index 字段。
record_id: 用于识别 record 的业务标识。

RECOMMENDED JOINS

怎样和其他表关联

该表主要按自身业务键使用，目前没有推荐的跨表主键联接。

HOW TO QUERY SAFELY

查询方法与已知限制

先用 catalog 确认当前契约；可按 catalog 中列出的 filters 进一步缩小范围；单页最多 5000 行，响应有 has_more 时原样传回 next_cursor 继续分页。

返回范围仍受 Friends 权限、单页上限和 catalog 中的筛选契约约束。

MACHINE CONTRACT

筛选、排序与分页

UNVERSIONED

默认排序: calendar_id, exchange, source_version, session_index, record_id
唯一键: calendar_id, exchange, source_version, session_index, record_id
读取模式: relation_default
最大时间窗: 未单独限制

可用 filters

exchange→ exchange · string

provider→ provider · string

POINT IN TIME

可复现读取

NOT AVAILABLE

该资产没有 PIT 契约。普通 rows 端点仍按当前公开读模式返回数据；不要把它表述成历史时点快照。

COPY-READY CALLS

怎么调用

同一数据集可用 HTTP、Python SDK、CLI 或 MCP；Key 始终只通过环境变量/Bearer Header 传递。

READ ONLY

HTTP

curl --fail-with-body -H "Authorization: Bearer $FRIENDS_DATA_API_KEY" "https://api.alphahubs.uk/api/v1/data/datasets/ref/quant_exchange_session_calendar/rows?limit=100&exchange=NASDAQ"

PYTHON SDK

from friends_data_api import FriendsDataClient, Settings

async with FriendsDataClient(Settings.from_env()) as client:
    page = await client.get_dataset_rows('ref', 'quant_exchange_session_calendar', limit=100, filters={'exchange': 'NASDAQ'})
    print(page.data)
    if page.has_more:
        print("next cursor:", page.next_cursor)

CLI

friends-data get-dataset-rows ref quant_exchange_session_calendar --limit 100 --filter exchange=NASDAQ

MCP TOOL CALL

{
  "arguments": {
    "dataset": "quant_exchange_session_calendar",
    "filters": {
      "exchange": "NASDAQ"
    },
    "limit": 100,
    "namespace": "ref"
  },
  "tool": "get_dataset_rows"
}

FIELD DICTIONARY

36 个返回字段

descriptionSource 可在 JSON 中区分仓库注释、标准术语表和名称推导说明。

筛选字段

#	字段	ClickHouse 类型	JSON	可空	角色	说明
1	`record_id`	`FixedString(64)`	`string`	no	default_order, warehouse_primary_key, contract_unique_key	Identifier for record.名称推导
2	`calendar_id`	`String`	`string`	no	default_order, warehouse_primary_key, contract_unique_key	Identifier for calendar.名称推导
3	`exchange`	`LowCardinality(String)`	`string`	no	filter, default_order, warehouse_primary_key, contract_unique_key	Listing or trading exchange.标准术语表
4	`timezone`	`String`	`string`	no	value	Source-normalized field: timezone.名称推导
5	`coverage_start`	`Date`	`string / date`	no	value	Source-normalized field: coverage start.名称推导
6	`coverage_end`	`Date`	`string / date`	no	value	Source-normalized field: coverage end.名称推导
7	`expected_session_count`	`UInt32`	`integer`	no	value	Count of expected session count.名称推导
8	`session_date`date	`Date`	`string / date`	no	value	Calendar date for session date (YYYY-MM-DD).名称推导
9	`session_index`	`UInt32`	`integer`	no	default_order, warehouse_primary_key, contract_unique_key	Source-normalized field: session index.名称推导
10	`open_ts`UTC_datetime	`DateTime64(6, 'UTC')`	`string / date-time`	no	value	UTC timestamp for open ts.名称推导
11	`close_ts`UTC_datetime	`DateTime64(6, 'UTC')`	`string / date-time`	no	value	UTC timestamp for close ts.名称推导
12	`knowledge_available_at`UTC_datetime	`DateTime64(6, 'UTC')`	`string / date-time`	no	warehouse_primary_key	UTC timestamp for knowledge available at.名称推导
13	`source_system`	`LowCardinality(String)`	`string`	no	value	Source-normalized field: source system.名称推导
14	`source_version`	`String`	`string`	no	default_order, warehouse_primary_key, contract_unique_key	Source-normalized field: source version.名称推导
15	`source_record_id`	`String`	`string`	no	warehouse_primary_key, provenance	Provider-side identifier for the source record.标准术语表
16	`raw_payload_sha256`	`FixedString(64)`	`string`	no	value	Source-normalized field: raw payload sha256.名称推导
17	`parser_version`	`LowCardinality(String)`	`string`	no	provenance	Version of the parser or normalizer that produced the row.标准术语表
18	`quality_status`	`LowCardinality(String)`	`string`	no	provenance	Machine-readable data-quality classification.标准术语表
19	`snapshot_sha256`	`FixedString(64)`	`string`	no	value	Source-normalized field: snapshot sha256.名称推导
20	`content_sha256`	`FixedString(64)`	`string`	no	value	Source-normalized field: content sha256.名称推导
21	`dataset_sha256`	`FixedString(64)`	`string`	no	value	Source-normalized field: dataset sha256.名称推导
22	`import_contract_sha256`	`FixedString(64)`	`string`	no	value	Source-normalized field: import contract sha256.名称推导
23	`reviewer_key_id`	`String`	`string`	no	value	Identifier for reviewer key.名称推导
24	`reviewer_key_record_sha256`	`FixedString(64)`	`string`	no	value	Source-normalized field: reviewer key record sha256.名称推导
25	`reviewed_at`UTC_datetime	`DateTime64(6, 'UTC')`	`string / date-time`	no	value	UTC timestamp for reviewed at.名称推导
26	`review_signature_sha256`	`FixedString(64)`	`string`	no	value	Source-normalized field: review signature sha256.名称推导
27	`calendar_source_sha256`	`FixedString(64)`	`string`	no	value	Source-normalized field: calendar source sha256.名称推导
28	`source_manifest_sha256`	`FixedString(64)`	`string`	no	value	Source-normalized field: source manifest sha256.名称推导
29	`version`	`UInt64`	`integer`	no	warehouse_primary_key, provenance	Monotonic row version used for correction-aware reads.标准术语表
30	`created_at`UTC_datetime	`DateTime64(6, 'UTC')`	`string / date-time`	no	time	UTC timestamp when the warehouse row was first created.标准术语表
31	`provider`	`LowCardinality(String)`	`string`	no	filter, provenance	Upstream data provider identifier.标准术语表
32	`source_url`	`String`	`string`	no	provenance	URL of the upstream evidence or record when distributable.标准术语表
33	`raw_payload_hash`	`String`	`string`	no	provenance	Opaque fingerprint of the normalized source payload for provenance checks.标准术语表
34	`license_scope`	`LowCardinality(String)`	`string`	no	provenance	License or redistribution scope attached to the row.标准术语表
35	`visibility_tier`	`LowCardinality(String)`	`string`	no	provenance	Serving visibility tier attached to the row.标准术语表
36	`ingest_run_id`	`String`	`string`	no	provenance	Identifier of the ingestion run that produced the row.标准术语表

字典口径

结构来自 Friends 只读身份可见的真实 serving relation；权限、过滤、排序、PIT 与分页来自可执行 DatasetSpec。Schema observed at 2026-10-06T18:08:52Z。