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May 26, 2020
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add sql statement about pump and drainer #3324

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12b5051
add sql statement about pump and drainer
WangXiangUSTC May 25, 2020
6dd5eaf
minor update
WangXiangUSTC May 25, 2020
169e748
update toc
WangXiangUSTC May 25, 2020
c0d62a4
Merge branch 'docs-special-week' into xiang/tools_sql
WangXiangUSTC May 25, 2020
e33f41e
add show master status
WangXiangUSTC May 25, 2020
16a67f0
Merge branch 'xiang/tools_sql' of https://github.com/WangXiangUSTC/do…
WangXiangUSTC May 25, 2020
08db095
Merge branch 'docs-special-week' into xiang/tools_sql
WangXiangUSTC May 25, 2020
ae23638
merge and resolve conflicts
WangXiangUSTC May 26, 2020
b9a7197
Merge branch 'xiang/tools_sql' of https://github.com/WangXiangUSTC/do…
WangXiangUSTC May 26, 2020
336ae37
Merge branch 'docs-special-week' into xiang/tools_sql
WangXiangUSTC May 26, 2020
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Apply suggestions from code review
WangXiangUSTC May 26, 2020
34bf3ec
add sql
WangXiangUSTC May 26, 2020
56665e7
Merge branch 'docs-special-week' into xiang/tools_sql
WangXiangUSTC May 26, 2020
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Merge branch 'docs-special-week' into xiang/tools_sql
WangXiangUSTC May 26, 2020
b3cfa72
Update sql-statements/sql-statement-change-drainer.md
WangXiangUSTC May 26, 2020
1b4daca
Update sql-statements/sql-statement-change-pump.md
WangXiangUSTC May 26, 2020
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Merge branch 'docs-special-week' into xiang/tools_sql
WangXiangUSTC May 26, 2020
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Apply suggestions from code review
WangXiangUSTC May 26, 2020
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Merge branch 'docs-special-week' into xiang/tools_sql
bb7133 May 26, 2020
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Merge branch 'docs-special-week' into xiang/tools_sql
yikeke May 26, 2020
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Merge branch 'docs-special-week' into xiang/tools_sql
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5 changes: 5 additions & 0 deletions TOC.md
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Expand Up @@ -247,6 +247,8 @@
- [`ANALYZE TABLE`](/sql-statements/sql-statement-analyze-table.md)
- [`BEGIN`](/sql-statements/sql-statement-begin.md)
- [`COMMIT`](/sql-statements/sql-statement-commit.md)
- [`CHANGE DRAINER`](/sql-statements/sql-statement-change-drainer.md)
- [`CHANGE PUMP`](/sql-statements/sql-statement-change-pump.md)
- [`CREATE BINDING`](/sql-statements/sql-statement-create-binding.md)
- [`CREATE DATABASE`](/sql-statements/sql-statement-create-database.md)
- [`CREATE INDEX`](/sql-statements/sql-statement-create-index.md)
Expand Down Expand Up @@ -303,6 +305,7 @@
- [`SHOW CREATE TABLE`](/sql-statements/sql-statement-show-create-table.md)
- [`SHOW CREATE USER`](/sql-statements/sql-statement-show-create-user.md)
- [`SHOW DATABASES`](/sql-statements/sql-statement-show-databases.md)
- [`SHOW DRAINER STATUS`](/sql-statements/sql-statement-show-drainer-status.md)
- [`SHOW ENGINES`](/sql-statements/sql-statement-show-engines.md)
- [`SHOW ERRORS`](/sql-statements/sql-statement-show-errors.md)
- [`SHOW [FULL] FIELDS FROM`](/sql-statements/sql-statement-show-fields-from.md)
Expand All @@ -312,8 +315,10 @@
- [`SHOW INDEXES [FROM|IN]`](/sql-statements/sql-statement-show-indexes.md)
- [`SHOW INDEX [FROM|IN]`](/sql-statements/sql-statement-show-index.md)
- [`SHOW KEYS [FROM|IN]`](/sql-statements/sql-statement-show-keys.md)
- [`SHOW MASTER STATUS`](/sql-statements/sql-statement-show-master-status.md)
- [`SHOW PRIVILEGES`](/sql-statements/sql-statement-show-privileges.md)
- [`SHOW [FULL] PROCESSSLIST`](/sql-statements/sql-statement-show-processlist.md)
- [`SHOW PUMP STATUS`](/sql-statements/sql-statement-show-pump-status.md)
- [`SHOW SCHEMAS`](/sql-statements/sql-statement-show-schemas.md)
- [`SHOW [FULL] TABLES`](/sql-statements/sql-statement-show-tables.md)
- [`SHOW TABLE REGIONS`](/sql-statements/sql-statement-show-table-regions.md)
Expand Down
71 changes: 71 additions & 0 deletions sql-statements/sql-statement-change-drainer.md
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---
title: CHANGE DRAINER
summary: TiDB 数据库中 CHANGE DRAINER 的使用概况。
category: reference
---

# CHANGE DRAINER

`CHANGE DRAINER` 语句用于修改集群中 Drainer 的状态信息。

> **注意：**
>
> Drainer 在正常运行时会自动上报状态到 PD，仅在 Drainer 处于异常情况导致实际状态与 PD 中保存的状态信息不一致时，使用该语句修改 PD 中存储的 Drainer 状态信息。

## 示例

{{< copyable "sql" >}}

```sql
SHOW DRAINER STATUS;
```

```sql
+----------|----------------|--------|--------------------|---------------------|
| NodeID | Address | State | Max_Commit_Ts | Update_Time |
+----------|----------------|--------|--------------------|---------------------|
| drainer1 | 127.0.0.3:8249 | Online | 408553768673342532 | 2019-04-30 00:00:03 |
+----------|----------------|--------|--------------------|---------------------|
| drainer2 | 127.0.0.4:8249 | Online | 408553768673345531 | 2019-05-01 00:00:04 |
+----------|----------------|--------|--------------------|---------------------|
2 rows in set (0.00 sec)
```

可以看出 `drainer1` 已经超过一天没有更新状态，该 Drainer 处于异常状态，但是 State 仍然为 `Online`，使用 `CHANGE DRAINER` 将该 Drainer 状态修改为 `paused`：

{{< copyable "sql" >}}

```sql
CHANGE DRAINER TO NODE_STATE ='paused' FOR NODE_ID 'drainer1';
```

```sql
Query OK, 0 rows affected (0.01 sec)
```

{{< copyable "sql" >}}

```sql
SHOW DRAINER STATUS;
```

```sql
+----------|----------------|--------|--------------------|---------------------|
| NodeID | Address | State | Max_Commit_Ts | Update_Time |
+----------|----------------|--------|--------------------|---------------------|
| drainer1 | 127.0.0.3:8249 | Paused | 408553768673342532 | 2019-04-30 00:00:03 |
+----------|----------------|--------|--------------------|---------------------|
| drainer2 | 127.0.0.4:8249 | Online | 408553768673345531 | 2019-05-01 00:00:04 |
+----------|----------------|--------|--------------------|---------------------|
2 rows in set (0.00 sec)
```

## MySQL 兼容性

MySQL 无此功能。

## 另请参阅

* [SHOW PUMP STATUS](/sql-statements/sql-statement-show-pump-status.md)
* [SHOW DRAINER STATUS](/sql-statements/sql-statement-show-drainer-status.md)
* [CHANGE PUMP STATUS](/sql-statements/sql-statement-change-pump.md)
71 changes: 71 additions & 0 deletions sql-statements/sql-statement-change-pump.md
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---
title: CHANGE PUMP
summary: TiDB 数据库中 CHANGE PUMP 的使用概况。
category: reference
---

# CHANGE PUMP

`CHANGE PUMP` 语句用于修改集群中 Pump 的状态信息。

> **注意：**
>
> Pump 在正常运行时会自动上报状态到 PD，仅在 Pump 处于异常情况导致实际状态与 PD 中保存的状态信息不一致时，使用该语句修改 PD 中存储的 Pump 状态信息。

## 示例

{{< copyable "sql" >}}

```sql
SHOW PUMP STATUS;
```

```sql
+--------|----------------|--------|--------------------|---------------------|
| NodeID | Address | State | Max_Commit_Ts | Update_Time |
+--------|----------------|--------|--------------------|---------------------|
| pump1 | 127.0.0.1:8250 | Online | 408553768673342237 | 2019-04-30 00:00:01 |
+--------|----------------|--------|--------------------|---------------------|
| pump2 | 127.0.0.2:8250 | Online | 408553768673342335 | 2019-05-01 00:00:02 |
+--------|----------------|--------|--------------------|---------------------|
2 rows in set (0.00 sec)
```

可以看出 `pump1` 已经超过一天没有更新状态，该 Pump 处于异常状态，但是 State 仍然为 `Online`，使用 `CHANGE PUMP` 将该 Pump 状态修改为 `paused`：

{{< copyable "sql" >}}

```sql
CHANGE PUMP TO NODE_STATE ='paused' FOR NODE_ID 'pump1';
```

```sql
Query OK, 0 rows affected (0.01 sec)
```

{{< copyable "sql" >}}

```sql
SHOW PUMP STATUS;
```

```sql
+--------|----------------|--------|--------------------|---------------------|
| NodeID | Address | State | Max_Commit_Ts | Update_Time |
+--------|----------------|--------|--------------------|---------------------|
| pump1 | 127.0.0.1:8250 | Paused | 408553768673342237 | 2019-04-30 00:00:01 |
+--------|----------------|--------|--------------------|---------------------|
| pump2 | 127.0.0.2:8250 | Online | 408553768673342335 | 2019-05-01 00:00:02 |
+--------|----------------|--------|--------------------|---------------------|
2 rows in set (0.00 sec)
```

## MySQL 兼容性

MySQL 无此功能。

## 另请参阅

* [SHOW PUMP STATUS](/sql-statements/sql-statement-show-pump-status.md)
* [SHOW DRAINER STATUS](/sql-statements/sql-statement-show-drainer-status.md)
* [CHANGE DRAINER STATUS](/sql-statements/sql-statement-change-drainer.md)
38 changes: 38 additions & 0 deletions sql-statements/sql-statement-show-drainer-status.md
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---
title: SHOW DRAINER STATUS
summary: TiDB 数据库中 SHOW DRAINER STATUS 的使用概况。
category: reference
---

# SHOW DRAINER STATUS

`SHOW DRAINER STATUS` 语句用于显示集群中所有 Drainer 的状态信息。

## 示例

{{< copyable "sql" >}}

```sql
SHOW DRAINER STATUS;
```

```sql
+----------|----------------|--------|--------------------|---------------------|
| NodeID | Address | State | Max_Commit_Ts | Update_Time |
+----------|----------------|--------|--------------------|---------------------|
| drainer1 | 127.0.0.3:8249 | Online | 408553768673342532 | 2019-05-01 00:00:03 |
+----------|----------------|--------|--------------------|---------------------|
| drainer2 | 127.0.0.4:8249 | Online | 408553768673345531 | 2019-05-01 00:00:04 |
+----------|----------------|--------|--------------------|---------------------|
2 rows in set (0.00 sec)
```

## MySQL 兼容性

MySQL 无此功能。

## 另请参阅

* [SHOW PUMP STATUS](/sql-statements/sql-statement-show-pump-status.md)
* [CHANGE PUMP STATUS](/sql-statements/sql-statement-change-pump.md)
* [CHANGE DRAINER STATUS](/sql-statements/sql-statement-change-drainer.md)
37 changes: 37 additions & 0 deletions sql-statements/sql-statement-show-master-status.md
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---
title: SHOW MASTER STATUS
summary: TiDB 数据库中 SHOW MASTER STATUS 的使用概况。
category: reference
---

# SHOW MASTER STATUS

`SHOW MASTER STATUS` 语句用于显示集群当前最新的 TSO 信息。

## 示例

{{< copyable "sql" >}}

```sql
SHOW MASTER STATUS;
```

```sql
+-------------+--------------------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+-------------+--------------------+--------------+------------------+-------------------+
| tidb-binlog | 416916363252072450 | | | |
+-------------+--------------------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
```

## MySQL 兼容性

`SHOW MASTER STATUS` 语句与 MySQL 兼容，但是执行结果有差异，在 MySQL 中执行结果为 binlog 的位置信息，而在 TiDB 中为最新的 TSO 信息。

## 另请参阅

* [SHOW PUMP STATUS](/sql-statements/sql-statement-show-pump-status.md)
* [SHOW DRAINER STATUS](/sql-statements/sql-statement-show-drainer-status.md)
* [CHANGE PUMP STATUS](/sql-statements/sql-statement-change-pump.md)
* [CHANGE DRAINER STATUS](/sql-statements/sql-statement-change-drainer.md)
38 changes: 38 additions & 0 deletions sql-statements/sql-statement-show-pump-status.md
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---
title: SHOW PUMP STATUS
summary: TiDB 数据库中 SHOW PUMP STATUS 的使用概况。
category: reference
---

# SHOW PUMP STATUS

`SHOW PUMP STATUS` 语句用于显示集群中所有 Pump 的状态信息。

## 示例

{{< copyable "sql" >}}

```sql
SHOW PUMP STATUS;
```

```sql
+--------|----------------|--------|--------------------|---------------------|
| NodeID | Address | State | Max_Commit_Ts | Update_Time |
+--------|----------------|--------|--------------------|---------------------|
| pump1 | 127.0.0.1:8250 | Online | 408553768673342237 | 2019-05-01 00:00:01 |
+--------|----------------|--------|--------------------|---------------------|
| pump2 | 127.0.0.2:8250 | Online | 408553768673342335 | 2019-05-01 00:00:02 |
+--------|----------------|--------|--------------------|---------------------|
2 rows in set (0.00 sec)
```

## MySQL 兼容性

MySQL 无此功能。

## 另请参阅

* [SHOW DRAINER STATUS](/sql-statements/sql-statement-show-drainer-status.md)
* [CHANGE PUMP STATUS](/sql-statements/sql-statement-change-pump.md)
* [CHANGE DRAINER STATUS](/sql-statements/sql-statement-change-drainer.md)