Skip to content

[Doc] Fix typo #4667

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
morningman merged 1 commit into from
Sep 28, 2020
Merged

[Doc] Fix typo #4667

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 2 additions & 2 deletions docs/zh-CN/getting-started/data-model-rollup.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -452,7 +452,7 @@ Doris 会自动命中这个 ROLLUP 表。

我们将一行数据的前 **36 个字节** 作为这行数据的前缀索引。当遇到 VARCHAR 类型时，前缀索引会直接截断。我们举例说明：

1. 以下表结构的前缀索引为 user_id(8Byte) + age(4Bytes) + message(prefix 24 Bytes)。
1. 以下表结构的前缀索引为 user_id(8Byte) + age(4Bytes) + message(prefix 20 Bytes)。

|ColumnName|Type|
|---|---|
Expand Down Expand Up @@ -508,7 +508,7 @@ Base 表结构如下：

可以看到，ROLLUP 和 Base 表的列完全一样，只是将 user_id 和 age 的顺序调换了。那么当我们进行如下查询时：

`SELECT * FROM table where age=20 and massage LIKE "%error%";`
`SELECT * FROM table where age=20 and message LIKE "%error%";`

会优先选择 ROLLUP 表，因为 ROLLUP 的前缀索引匹配度更高。

Expand Down