db_view/service/internal/common/databases/drivers/mysql/v8/connect.go

package v8

import (
	"context"
	"database/sql"
	"dbview/service/internal/common/databases/drivers"
	"dbview/service/internal/common/databases/meta"
	"fmt"
	"strings"

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

type MySQLDriver struct {
	Name    string
	version string
	db      *sql.DB
}

func NewMySQLDriver(version string) drivers.Driver {
	return &MySQLDriver{Name: "mysql", version: version}
}

func (d *MySQLDriver) Version() string {
	return d.version
}

func (d *MySQLDriver) Open(config *meta.ConnectionConfig) (drivers.Connection, error) {

	// 组装DSN
	dsn := fmt.Sprintf("%s:%s@tcp(%s:%d)/%s",
		config.Username,
		config.Password,
		config.Host,
		config.Port,
		config.Database,
	)

	// 处理额外参数
	if len(config.ExtraParams) > 0 {
		params := ""
		for k, v := range config.ExtraParams {
			params += fmt.Sprintf("%s=%s&", k, v)
		}
		// 去掉最后一个&
		params = strings.TrimRight(params, "&")
		dsn = dsn + "?" + params
	}

	db, err := sql.Open("mysql", dsn)
	if err != nil {
		return nil, err
	}

	// 返回一个连接实例（可以与 MySQLDriver 类型共用结构体），保留 Name/version
	return &MySQLDriver{Name: d.Name, version: d.version, db: db}, nil
}
func (q *MySQLDriver) Close() error {
	return q.db.Close()
}

// Ping implements drivers.Connection
func (q *MySQLDriver) Ping(ctx context.Context) error {
	if q.db == nil {
		return fmt.Errorf("db is nil")
	}
	return q.db.PingContext(ctx)
}