1. 实现配置文件解析

2. 实现数据库连接

vendor/gorm.io/gorm/callbacks/raw.go

@@ -0,0 +1,17 @@
+package callbacks
+
+import (
+	"gorm.io/gorm"
+)
+
+func RawExec(db *gorm.DB) {
+	if db.Error == nil && !db.DryRun {
+		result, err := db.Statement.ConnPool.ExecContext(db.Statement.Context, db.Statement.SQL.String(), db.Statement.Vars...)
+		if err != nil {
+			db.AddError(err)
+			return
+		}
+
+		db.RowsAffected, _ = result.RowsAffected()
+	}
+}