Map receive returned incorrect result

[feng199464]

I called the stored procedure from XML. The result returned by the stored procedure contains special characters. The type received by XML is map. The result I got is incorrect. The "." in the figure below is split

[harawata]

Hello @feng199464 ,

In MyBatis, dot is used describe nested objects.
You should use AS in the query to assign an alias.

Closing as this is a duplicate of #13 .

[feng199464]

你好@feng199464，

在 MyBatis 中，dot 用于描述嵌套对象。
您应该AS在查询中使用来分配别名。

关闭，因为这是#13的副本。
I have used the as alias, but the field value will be converted to the field name display. The field name converted from the field value is dynamic, which I can't control

[harawata]

I think you are now talking about mapping from HashMap to JSON.
It has nothing to do with MyBatis.
Please elaborate if I misunderstood.

[feng199464]

我认为您现在正在谈论从HashMap到 JSON 的映射。
它与 MyBatis 无关。
如果我误解了，请详细说明。
My problem is that the data format returned from mybatis to HashMap is incorrect

[harawata]

Okay, then please create a small demo project like these and share it on your repository.
I need it to understand your problem correctly.

[feng199464]

Okay, then please create a small demo project like these and share it on your repository.
I need it to understand your problem correctly.

CREATE TABLE mybatis_demo (
id int NOT NULL,
name varchar(255) DEFAULT NULL,
age int DEFAULT NULL,
PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

INSERT INTO mybatis_demo VALUES (1, 'dsad', 13);

https://github.com/feng199464/mybatisdemo.git

[harawata]

Ah...you assign an alias that contains a dot. 😅
I cannot think of a good solution, then.
You may have to assign a column alias that does not contain dot in the query and replace the map key afterwards.

[feng199464]

Okay, then please create a small demo project like these and share it on your repository.
I need it to understand your problem correctly.

CREATE TABLE mybatis_demo (
id int NOT NULL,
name varchar(255) DEFAULT NULL,
age int DEFAULT NULL,
PRIMARY KEY (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

INSERT INTO mybatis_demo VALUES (1, 'dsad', 13);

https://github.com/feng199464/mybatisdemo.git

In mybatis, if the field alias has a decimal point, it cannot be resolved if it is returned to the map, but my current business needs to dynamically convert the field row value into field column display, for example:

---

ID | subject | score | name |

1 | english | 90 | lucy |

2 | math | 90 | lucy |

3 | math | 100 | jack |

4 | chinese | 85 | tom |

                         ↓
                         ↓

---

english | math | chinese | name

90 | 90 | 0 | lucy

0 | 100 | 0 | jack

0 | 0 | 85 | tom

I drew a watch

The above figure shows a row of scores for each user. Now I will dynamically convert the account name value into field display

The following figure shows the converted data

I can't restrict users from adding special characters "."

[feng199464]

Ah...you assign an alias that contains a dot. 😅
I cannot think of a good solution, then.
You may have to assign a column alias that does not contain dot in the query and replace the map key afterwards.

When users add data, they use the date as the name of the course. For example: 7.23 English class

[harawata]

If you have no control over column aliases, there may be something wrong with your project's design.
You should check if the query is vulnerable to SQL injection.

Anyway, MyBatis is working as designed.

[harawata]

Duplicate of #13