mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-10-17 22:10:54 +00:00
cd14f9ebcb
* split up select.md * array-join.md basic refactoring * distinct.md basic refactoring * format.md basic refactoring * from.md basic refactoring * group-by.md basic refactoring * having.md basic refactoring * additional index.md refactoring * into-outfile.md basic refactoring * join.md basic refactoring * limit.md basic refactoring * limit-by.md basic refactoring * order-by.md basic refactoring * prewhere.md basic refactoring * adjust operators/index.md links * adjust sample.md links * adjust more links * adjust operatots links * fix some links * adjust aggregate function article titles * basic refactor of remaining select clauses * absolute paths in make_links.sh * run make_links.sh * remove old select.md locations * translate docs/es * translate docs/fr * translate docs/fa * remove old operators.md location * change operators.md links * adjust links in docs/es * adjust links in docs/es * minor texts adjustments * wip * update machine translations to use new links * fix changelog * es build fixes * get rid of some select.md links * temporary adjust ru links * temporary adjust more ru links * improve curly brace handling * adjust ru as well * fa build fix * ru link fixes * zh link fixes * temporary disable part of anchor checks
19 lines
575 B
Markdown
19 lines
575 B
Markdown
---
|
|
machine_translated: true
|
|
machine_translated_rev: 72537a2d527c63c07aa5d2361a8829f3895cf2bd
|
|
toc_priority: 31
|
|
toc_title: "\u61D2\u60F0"
|
|
---
|
|
|
|
# 懒惰 {#lazy}
|
|
|
|
仅将表保留在RAM中 `expiration_time_in_seconds` 上次访问后几秒钟。 只能与\*日志表一起使用。
|
|
|
|
它针对存储许多小\*日志表进行了优化,访问之间存在较长的时间间隔。
|
|
|
|
## 创建数据库 {#creating-a-database}
|
|
|
|
CREATE DATABASE testlazy ENGINE = Lazy(expiration_time_in_seconds);
|
|
|
|
[原始文章](https://clickhouse.tech/docs/en/database_engines/lazy/) <!--hide-->
|