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Posted to commits@iotdb.apache.org by ro...@apache.org on 2021/09/26 03:30:55 UTC
[iotdb] 05/05: nested queries -> nested expressions
This is an automated email from the ASF dual-hosted git repository.
rong pushed a commit to branch const
in repository https://gitbox.apache.org/repos/asf/iotdb.git
commit ec9704540e63d0fc0af0fe483188fc2660952841
Author: Steve Yurong Su <ro...@apache.org>
AuthorDate: Sun Sep 26 11:30:00 2021 +0800
nested queries -> nested expressions
---
docs/UserGuide/IoTDB-SQL-Language/DML-Data-Manipulation-Language.md | 4 +---
.../zh/UserGuide/IoTDB-SQL-Language/DML-Data-Manipulation-Language.md | 4 +---
2 files changed, 2 insertions(+), 6 deletions(-)
diff --git a/docs/UserGuide/IoTDB-SQL-Language/DML-Data-Manipulation-Language.md b/docs/UserGuide/IoTDB-SQL-Language/DML-Data-Manipulation-Language.md
index 236f4a2..4b04ef9 100644
--- a/docs/UserGuide/IoTDB-SQL-Language/DML-Data-Manipulation-Language.md
+++ b/docs/UserGuide/IoTDB-SQL-Language/DML-Data-Manipulation-Language.md
@@ -468,9 +468,7 @@ Known Implementation UDF Libraries:
+ [IoTDB-Quality](https://thulab.github.io/iotdb-quality), a UDF library about data quality, including data profiling, data quality evalution and data repairing, etc.
-### Nested Query (Subquery)
-
-"Nested query" is also called "subquery", that is, in a SQL statement, the result of the "inner query" can be used as the input of the "outer query".
+### Nested Expressions
IoTDB supports the execution of arbitrary nested expressions consisting of **time series, arithmetic expressions, and time series generation functions (including user-defined functions)** in the `select` clause.
diff --git a/docs/zh/UserGuide/IoTDB-SQL-Language/DML-Data-Manipulation-Language.md b/docs/zh/UserGuide/IoTDB-SQL-Language/DML-Data-Manipulation-Language.md
index e77fd83..ea5cd13 100644
--- a/docs/zh/UserGuide/IoTDB-SQL-Language/DML-Data-Manipulation-Language.md
+++ b/docs/zh/UserGuide/IoTDB-SQL-Language/DML-Data-Manipulation-Language.md
@@ -477,9 +477,7 @@ It costs 0.005s
+ [IoTDB-Quality](https://thulab.github.io/iotdb-quality)，一个关于数据质量的 UDF 库实现，包括数据画像、数据质量评估与修复等一系列函数。
-### 嵌套查询（子查询）
-
-“嵌套查询”又称为“子查询”，即在一条 SQL 语句中，“内层查询”的计算结果可以作为“外层查询”的计算对象来使用。
+### 嵌套表达式
IoTDB 支持在 `select` 字句中执行由**时间序列、算数运算表达式和时间序列生成函数（包括用户自定义函数）**组成的任意嵌套表达式。