connection 方法在阿里云 PolarDB 中无效

[zwjzxh520]

代码如下

    dsn := "xxx:xxxx@tcp(xxxx)/xxx?charset=utf8mb4&parseTime=True&loc=Local"
    db, err := gorm.Open(mysql.Open(dsn), &gorm.Config{})
    if err != nil {
        log.Fatalf("connect db get error: %v", err)
        return
    }
    srcDb, err := db.DB()
    srcDb.SetMaxIdleConns(1)
    srcDb.SetMaxOpenConns(1)
    srcDb.SetConnMaxLifetime(time.Hour)

    db.Connection(func(dbs *gorm.DB) error {

        if result := dbs.Exec("create temporary table temp_order_weixin as select * from `order` where bank = 'weixin' AND id > 1"); result.Error != nil {
            log.Fatalf("create temp table get error: %v", result.Error)
            return result.Error
        }

        var count int64
        if result := dbs.Table("temp_order_weixin as o").
            Select("count(o.id)").
            Where("o.id > ?", 1).
            Count(&count); result.Error != nil {
            log.Fatalf("count get error: %v", result.Error)
            return result.Error
        }
        return nil
    })

运行日志

2022/11/25 17:50:24 /demo/demo.go:120 SLOW SQL >= 200ms
[798.551ms] [rows:64350] create temporary table temp_order_weixin as select * from `order` where bank = 'weixin' AND id > 1

2022/11/25 17:50:24 /demo/demo.go:131 Error 1146: Table 'vip_paygateway.temp_order_weixin' doesn't exist
[101.445ms] [rows:64350] SELECT count(o.id) FROM temp_order_weixin as o WHERE  o.id > 1
2022/11/25 17:50:24 count get error: Error 1146: Table 'vip_paygateway.temp_order_weixin' doesn't exist

在阿里云普通的 RDS 中不会报此错误。

https://github.com/go-gorm/playground/pull/545

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[li-jin-gou]

This seems to be a database problem.😁

[zwjzxh520]

应该不是的。 我发现有个情况： Raw() 方法，如果不传第二个参数，则能正常执行。只要传了第二个参数，就会报这个问题