From 016496fc3ed929a2be34f84e1d76f28a9416ba3e Mon Sep 17 00:00:00 2001
From: tangenta <tangenta@126.com>
Date: Mon, 25 May 2020 16:19:08 +0800
Subject: [PATCH 1/2] update sql-statement-modify-column.md

---
 sql-statements/sql-statement-modify-column.md | 39 +++++++------------
 1 file changed, 14 insertions(+), 25 deletions(-)

diff --git a/sql-statements/sql-statement-modify-column.md b/sql-statements/sql-statement-modify-column.md
index eda8d099cbb3..28bae04dab63 100644
--- a/sql-statements/sql-statement-modify-column.md
+++ b/sql-statements/sql-statement-modify-column.md
@@ -67,7 +67,7 @@ Query OK, 0 rows affected (0.09 sec)
 {{< copyable "sql" >}}
 
 ```sql
-SHOW CREATE TABLE t1;
+SHOW CREATE TABLE t1\G;
 ```
 
 ```
@@ -81,42 +81,31 @@ Create Table: CREATE TABLE `t1` (
 1 row in set (0.00 sec)
 ```
 
-{{< copyable "sql" >}}
+## MySQL 兼容性
 
-```sql
-ALTER TABLE t1 MODIFY col1 INT;
-```
+* 不支持在单个 `ALTER TABLE` 语句修改多个列，例如：
 
-```
-ERROR 1105 (HY000): unsupported modify column length 11 is less than origin 20
+```sql
+ALTER TABLE t1 MODIFY col1 BIGINT, MODIFY id BIGINT NOT NULL;
+ERROR 1105 (HY000): Unsupported multi schema change
 ```
 
-{{< copyable "sql" >}}
+* 不支持有损变更，以及部分数据类型的更改（包括整数改为字符串或 BLOB 格式等）。例如：
 
 ```sql
-ALTER TABLE t1 MODIFY col1 BLOB;
-```
-
-```
-ERROR 1105 (HY000): unsupported modify column type 252 not match origin 8
+CREATE TABLE t1 (col1 BIGINT);
+ALTER TABLE t1 MODIFY col1 INT;
+ERROR 8200 (HY000): Unsupported modify column length 11 is less than origin 20
 ```
 
-{{< copyable "sql" >}}
+* 不支持修改 decimal 类型的精度。例如：
 
 ```sql
-ALTER TABLE t1 MODIFY col1 BIGINT, MODIFY id BIGINT NOT NULL;
-```
-
-```
-ERROR 1105 (HY000): can't run multi schema change
+CREATE TABLE t (a DECIMAL(5, 3));
+ALTER TABLE t MODIFY COLUMN a DECIMAL(6, 3);
+ERROR 8200 (HY000): Unsupported modify column: can't change decimal column precision
 ```
 
-## MySQL 兼容性
-
-* 目前不支持使用单个 `ALTER TABLE` 语句进行多个修改。
-* 仅支持特定类型的数据类型更改。例如，支持将 `INTEGER` 改为 `BIGINT`，但不支持将 `BIGINT` 改为 `INTEGER`。不支持将整数改为字符串格式或 BLOB 格式。
-* 不支持修改 decimal 类型的精度。
-
 ## 另请参阅
 
 * [CREATE TABLE](/sql-statements/sql-statement-create-table.md)

From e24d77a1396668bb1277d36fa17d8c8224d0d521 Mon Sep 17 00:00:00 2001
From: TomShawn <41534398+TomShawn@users.noreply.github.com>
Date: Mon, 25 May 2020 21:15:30 +0800
Subject: [PATCH 2/2] refine format

---
 sql-statements/sql-statement-modify-column.md | 28 +++++++++----------
 1 file changed, 14 insertions(+), 14 deletions(-)

diff --git a/sql-statements/sql-statement-modify-column.md b/sql-statements/sql-statement-modify-column.md
index 28bae04dab63..8b42c800a3e9 100644
--- a/sql-statements/sql-statement-modify-column.md
+++ b/sql-statements/sql-statement-modify-column.md
@@ -85,26 +85,26 @@ Create Table: CREATE TABLE `t1` (
 
 * 不支持在单个 `ALTER TABLE` 语句修改多个列，例如：
 
-```sql
-ALTER TABLE t1 MODIFY col1 BIGINT, MODIFY id BIGINT NOT NULL;
-ERROR 1105 (HY000): Unsupported multi schema change
-```
+    ```sql
+    ALTER TABLE t1 MODIFY col1 BIGINT, MODIFY id BIGINT NOT NULL;
+    ERROR 1105 (HY000): Unsupported multi schema change
+    ```
 
 * 不支持有损变更，以及部分数据类型的更改（包括整数改为字符串或 BLOB 格式等）。例如：
 
-```sql
-CREATE TABLE t1 (col1 BIGINT);
-ALTER TABLE t1 MODIFY col1 INT;
-ERROR 8200 (HY000): Unsupported modify column length 11 is less than origin 20
-```
+    ```sql
+    CREATE TABLE t1 (col1 BIGINT);
+    ALTER TABLE t1 MODIFY col1 INT;
+    ERROR 8200 (HY000): Unsupported modify column length 11 is less than origin 20
+    ```
 
 * 不支持修改 decimal 类型的精度。例如：
 
-```sql
-CREATE TABLE t (a DECIMAL(5, 3));
-ALTER TABLE t MODIFY COLUMN a DECIMAL(6, 3);
-ERROR 8200 (HY000): Unsupported modify column: can't change decimal column precision
-```
+    ```sql
+    CREATE TABLE t (a DECIMAL(5, 3));
+    ALTER TABLE t MODIFY COLUMN a DECIMAL(6, 3);
+    ERROR 8200 (HY000): Unsupported modify column: can't change decimal column precision
+    ```
 
 ## 另请参阅