sql/ydb: tried to use driver unwrap from ydb-go-sdk (ydb-platform#4)

Author: LostImagin4tion

sql/ydb/driver.go

@@ -17,6 +17,7 @@ import (
 	"ariga.io/atlas/sql/migrate"
 	"ariga.io/atlas/sql/schema"
 	"ariga.io/atlas/sql/sqlclient"
+	"github.com/ydb-platform/ydb-go-sdk/v3"
 	ydbSdk "github.com/ydb-platform/ydb-go-sdk/v3"
 )
 
@@ -59,6 +60,7 @@ func init() {
 	sqlclient.Register(
 		DriverName,
 		sqlclient.OpenerFunc(opener),
+		sqlclient.RegisterDriverOpener(Open),
 		sqlclient.RegisterURLParser(parser{}),
 	)
 }
@@ -81,7 +83,7 @@ func opener(ctx context.Context, dsn *url.URL) (*sqlclient.Client, error) {
 	}
 
 	sqlDriver := sql.OpenDB(conn)
-	migrateDriver, err := Open(nativeDriver, sqlDriver)
+	migrateDriver, err := Open(sqlDriver)
 	if err != nil {
 		if cerr := sqlDriver.Close(); cerr != nil {
 			err = fmt.Errorf("%w: %v", err, cerr)
@@ -102,14 +104,32 @@ func opener(ctx context.Context, dsn *url.URL) (*sqlclient.Client, error) {
 }
 
 // Open opens a new YDB driver.
-func Open(nativeDriver *ydbSdk.Driver, sqlDriver *sql.DB) (migrate.Driver, error) {
+func Open(db schema.ExecQuerier) (migrate.Driver, error) {
+	var (
+		nativeDriver *ydb.Driver
+		err          error
+	)
+
+	switch casted := db.(type) {
+	case *sql.DB:
+		nativeDriver, err = ydb.Unwrap(casted)
+	case *sql.Conn:
+		nativeDriver, err = ydb.Unwrap(casted)
+	default:
+		return nil, fmt.Errorf("ydb: expected *sql.DB or *sql.Conn but got %T", db)
+	}
+
+	if err != nil {
+		return nil, fmt.Errorf("ydb: failed to unwrap ydb native driver: %v", err)
+	}
+
 	c := &conn{
-		ExecQuerier:  sqlDriver,
+		ExecQuerier:  db,
 		nativeDriver: nativeDriver,
 		database:     nativeDriver.Name(),
 	}
 
-	rows, err := sqlDriver.QueryContext(context.Background(), "SELECT version()")
+	rows, err := db.QueryContext(context.Background(), "SELECT version()")
 	if err != nil {
 		return nil, fmt.Errorf("ydb: failed to query version: %w", err)
 	}