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docs/cn/sql-reference/20-sql-functions/15-context-functions/last-query-id.md

@@ -1,23 +1,140 @@
----
-title: LAST_QUERY_ID
----
-
-返回当前会话中最近查询的查询ID，索引可以是(-1, 1, 1+2)...，超出范围的索引将返回空字符串。
-
-## 语法
-
-```sql
-LAST_QUERY_ID(<index>)
-```
-
-## 示例
-
-```sql
-SELECT LAST_QUERY_ID(-1);
-
-┌──────────────────────────────────────┐
-│         last_query_id((- 1))         │
-├──────────────────────────────────────┤
-│ a6f615c6-5bad-4863-8558-afd01889448c │
-└──────────────────────────────────────┘
+---
+title: LAST_QUERY_ID
+---
+
+基于查询的顺序，返回当前会话中查询的 ID。
+
+:::note
+此函数目前仅支持通过 MySQL 协议，这意味着您必须使用与 MySQL 协议兼容的客户端连接到 Databend 才能使其工作。
+:::
+
+## 语法
+
+```sql
+LAST_QUERY_ID(<index>)
+```
+`index` 指定当前会话中的查询顺序，接受正数和负数，默认值为 `-1`。
+- 正索引（从 `1` 开始）检索会话开始后的第 n 个查询。
+- 负索引从当前查询向后检索第 n 个查询。
+    - 当 `index` 为 `-1` 时，它返回当前查询的查询 ID。
+    - 要检索上一个查询，请将 `index` 设置为 `-2`。
+- 如果索引超出查询历史记录，则返回 NULL。
+
+## 示例
+
+此示例在新会话中运行三个简单查询，然后使用正索引和负索引来检索 `SELECT 3` 的查询 ID：
+
+|                                              | Positive | Negative |
+|----------------------------------------------|----------|----------|
+| `SELECT 1`                                   | 1        | -4       |
+| `SELECT 2`                                   | 2        | -3       |
+| `SELECT 3`                                   | 3        | -2       |
+| `SELECT LAST_QUERY_ID(-2), LAST_QUERY_ID(3)` | 4        | -1       |
+
+```bash
+MacBook-Air:~ eric$ mysql -u root -h 127.0.0.1 -P 3307
+Welcome to the MySQL monitor.  Commands end with ; or \g.
+Your MySQL connection id is 9
+Server version: 8.0.90-v1.2.720-nightly-2280cc9480(rust-1.85.0-nightly-2025-04-08T04:40:36.379825500Z) 0
+
+Copyright (c) 2000, 2025, Oracle and/or its affiliates.
+
+Oracle is a registered trademark of Oracle Corporation and/or its
+affiliates. Other names may be trademarks of their respective
+owners.
+
+Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
+
+mysql> select 1;
++------+
+| 1    |
++------+
+|    1 |
++------+
+1 row in set (0.02 sec)
+Read 1 rows, 1.00 B in 0.004 sec., 264.46 rows/sec., 264.46 B/sec.
+
+mysql> select 2;
++------+
+| 2    |
++------+
+|    2 |
++------+
+1 row in set (0.01 sec)
+Read 1 rows, 1.00 B in 0.003 sec., 366.94 rows/sec., 366.94 B/sec.
+
+mysql> select 3;
++------+
+| 3    |
++------+
+|    3 |
++------+
+1 row in set (0.01 sec)
+Read 1 rows, 1.00 B in 0.003 sec., 373.16 rows/sec., 373.16 B/sec.
+
+mysql> SELECT LAST_QUERY_ID(-2), LAST_QUERY_ID(3);
++--------------------------------------+--------------------------------------+
+| last_query_id(- 2)                   | last_query_id(3)                     |
++--------------------------------------+--------------------------------------+
+| 74dd6dca-f9b0-44cd-99f4-ac7d11d47fee | 74dd6dca-f9b0-44cd-99f4-ac7d11d47fee |
++--------------------------------------+--------------------------------------+
+1 row in set (0.02 sec)
+Read 1 rows, 1.00 B in 0.006 sec., 167.95 rows/sec., 167.95 B/sec.
+```
+
+此示例演示了当 `<index>` 为 `-1` 时，该函数返回当前查询的查询 ID：
+
+```bash
+MacBook-Air:~ eric$ mysql -u root -h 127.0.0.1 -P 3307
+Welcome to the MySQL monitor.  Commands end with ; or \g.
+Your MySQL connection id is 10
+Server version: 8.0.90-v1.2.720-nightly-2280cc9480(rust-1.85.0-nightly-2025-04-08T04:40:36.379825500Z) 0
+
+Copyright (c) 2000, 2025, Oracle and/or its affiliates.
+
+Oracle is a registered trademark of Oracle Corporation and/or its
+affiliates. Other names may be trademarks of their respective
+owners.
+
+Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
+
+mysql> SELECT LAST_QUERY_ID(-1), LAST_QUERY_ID();
++--------------------------------------+--------------------------------------+
+| last_query_id(- 1)                   | last_query_id()                      |
++--------------------------------------+--------------------------------------+
+| 5a1afbc2-dc16-4b69-a0e6-615e0b970cb1 | 5a1afbc2-dc16-4b69-a0e6-615e0b970cb1 |
++--------------------------------------+--------------------------------------+
+1 row in set (0.01 sec)
+Read 1 rows, 1.00 B in 0.003 sec., 393.68 rows/sec., 393.68 B/sec.
+
+mysql> SELECT LAST_QUERY_ID(-2);
++--------------------------------------+
+| last_query_id(- 2)                   |
++--------------------------------------+
+| 5a1afbc2-dc16-4b69-a0e6-615e0b970cb1 |
++--------------------------------------+
+1 row in set (0.01 sec)
+Read 1 rows, 1.00 B in 0.003 sec., 381.61 rows/sec., 381.61 B/sec.
+
+mysql> SELECT LAST_QUERY_ID(1);
++--------------------------------------+
+| last_query_id(1)                     |
++--------------------------------------+
+| 5a1afbc2-dc16-4b69-a0e6-615e0b970cb1 |
++--------------------------------------+
+1 row in set (0.01 sec)
+Read 1 rows, 1.00 B in 0.003 sec., 353.63 rows/sec., 353.63 B/sec.
+```
+
+当 `index` 超出查询历史记录时，将返回 NULL。
+
+```bash
+mysql> SELECT LAST_QUERY_ID(-100), LAST_QUERY_ID(100);
++----------------------+--------------------+
+| last_query_id(- 100) | last_query_id(100) |
++----------------------+--------------------+
+|                      |                    |
++----------------------+--------------------+
+1 row in set (0.02 sec)
+Read 1 rows, 1.00 B in 0.008 sec., 128.69 rows/sec., 128.69 B/sec.
 ```