请问, 在 Golang 里面如何实现以下的 SQL? - V2EX
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suueyoung

请问, 在 Golang 里面如何实现以下的 SQL?

  •  
  •   suueyoung Apr 22, 2022 2681 views
    This topic created in 1469 days ago, the information mentioned may be changed or developed.
    SET SESSION block_encryption_mode = 'aes-256-ecb'; SELECT filed FROM schema.table WHERE encrypted_field in ( SELECT HEX(AES_ENCRYPT('123', 'secret')) ); 

    只知道一步一步地执行, 但是遇上这样的, 就不知道怎么办了.

    pluvet
        1
    pluvet  
       Apr 22, 2022
    Golang 不支持 SQL 语法
    codefever
        2
    codefever  
       Apr 22, 2022
    在用 Golang 进行开发的时候,如果需要在和数据库交互,则可以使用 database/sql 包。这是一个对关系型数据库的通用抽象,它提供了标准的、轻量的、面向行的接口。
    morty0
        3
    morty0  
       Apr 22, 2022
    Prepare 应该就可以吧
    PeterYang1996
        4
    PeterYang1996  
       Apr 22, 2022
    为什么一定要用 sql 实现呢
    seakingii
        5
    seakingii  
       Apr 22, 2022
    复杂的 SQL 可以做成存储过程供 GO 调用.
    MoYi123
        6
    MoYi123  
       Apr 22, 2022
    放事务里,分 2 句跑.
    freemoon
        7
    freemoon  
       Apr 22, 2022
    db.InTransaction( your_logic() )
    lesismal
        8
    lesismal  
       Apr 22, 2022   1
    注意注释地方:

    ```golang
    package main

    import (
    "database/sql"
    "log"

    _ "github.com/go-sql-driver/mysql"
    )

    func main() {
    // 默认不支持 multi statements ,要设置 multiStatements=true ,否则无法在一个 Exec/Query 里执行多条语句
    db, err := sql.Open("mysql", "root:123qwe@tcp(127.0.0.1:3306)/?charset=utf8mb4&multiStatements=true")
    if err != nil {
    log.Fatal(err)
    }

    result, err := db.Query(`
    SET SESSION block_encryption_mode = 'aes-256-ecb';

    SELECT filed
    FROM schema.table
    WHERE encrypted_field in (
    SELECT HEX(AES_ENCRYPT('123', 'secret'))
    );
    `)
    if err != nil {
    log.Fatal(err)
    }

    defer result.Close()
    for result.Next() {
    var filed string
    err = result.Scan(&filed)
    if err != nil {
    log.Fatal(err)
    }
    log.Println("filed:", filed)
    }
    }
    ```
    suueyoung
        9
    suueyoung  
    OP
       Apr 23, 2022
    太感谢了!
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