db, err := ydb.Open(ctx, "grpc://localhost:2136/local")
if err != nil {
    log.Fatal(err)
}

// Do retry operation on errors with best effort
err := db.Query().Do( // Do retry operation on errors with best effort
   ctx, // context manage exiting from Do
   func(ctx context.Context, s query.Session) (err error) { // retry operation
   	streamResult, err := s.Query(ctx, `SELECT 42 as id, "myStr" as myStr;`)
   	if err != nil {
   		return err // for auto-retry with driver
   	}
   	defer func() { _ = streamResult.Close(ctx) }() // cleanup resources
   	for rs, err := range streamResult.ResultSets(ctx) {
   		if err != nil {
   			return err
   		}
   		for row, err := range rs.Rows(ctx) {
   			if err != nil {
   				return err
   			}
   			type myStruct struct {
   				id  uint64 `sql:"id"`
   				str string `sql:"myStr"`
   			}
   			var s myStruct
   			if err = row.ScanStruct(&s); err != nil {
   				return err // generally scan error not retryable, return it for driver check error
   			}
   		}
   	}

   	return nil
   },
   query.WithIdempotent(),
)
if err != nil {
   log.Fatal(err)
}

import (
    "context"
    "database/sql"
    "log"

    _ "github.com/ydb-platform/ydb-go-sdk/v3"
)

...

db, err := sql.Open("ydb", "grpc://localhost:2136/local")
if err != nil {
    log.Fatal(err)
}
defer db.Close() // cleanup resources
var (
    id    int32
    myStr string
)
row := db.QueryRowContext(context.TODO(), `SELECT 42 as id, "my string" as myStr`)
if err = row.Scan(&id, &myStr); err != nil {
    log.Printf("select failed: %v", err)
    return
}
log.Printf("id = %d, myStr = \"%s\"", id, myStr)