Пакетная вставка данных

package main

import (
  "context"
  "os"
  
  "github.com/ydb-platform/ydb-go-sdk/v3"
  "github.com/ydb-platform/ydb-go-sdk/v3/table"
  "github.com/ydb-platform/ydb-go-sdk/v3/table/types"
)

func main() {
  ctx, cancel := context.WithCancel(context.Background())
  defer cancel()
  db, err := ydb.Open(ctx,
    os.Getenv("YDB_CONNECTION_STRING"),
    ydb.WithAccessTokenCredentials(os.Getenv("YDB_TOKEN")),
  )
  if err != nil {
    panic(err)
  }
  defer db.Close(ctx) 
  type logMessage struct {
    App       string
    Host      string
    Timestamp time.Time
    HTTPCode  uint32
    Message   string
  }
  // prepare native go data
  const batchSize = 10000
  logs := make([]logMessage, 0, batchSize)
  for i := 0; i < batchSize; i++ {
    message := logMessage{
      App:       fmt.Sprintf("App_%d", i/256),
      Host:      fmt.Sprintf("192.168.0.%d", i%256),
      Timestamp: time.Now().Add(time.Millisecond * time.Duration(i%1000)),
      HTTPCode:  200,
    }
    if i%2 == 0 {
      message.Message = "GET / HTTP/1.1"
    } else {
      message.Message = "GET /images/logo.png HTTP/1.1"
    }
    logs = append(logs, message)
  }
  // execute bulk upsert with native ydb data
  err = db.Table().Do( // Do retry operation on errors with best effort
    ctx, // context manage exiting from Do
    func(ctx context.Context, s table.Session) (err error) { // retry operation
      rows := make([]types.Value, 0, len(logs))
      for _, msg := range logs {
        rows = append(rows, types.StructValue(
          types.StructFieldValue("App", types.UTF8Value(msg.App)),
          types.StructFieldValue("Host", types.UTF8Value(msg.Host)),
          types.StructFieldValue("Timestamp", types.TimestampValueFromTime(msg.Timestamp)),
          types.StructFieldValue("HTTPCode", types.Uint32Value(msg.HTTPCode)),
          types.StructFieldValue("Message", types.UTF8Value(msg.Message)),
        ))
      }
      return s.BulkUpsert(ctx, "/local/bulk_upsert_example", types.ListValue(rows...))
    },
  )
  if err != nil {
    fmt.Printf("unexpected error: %v", err)
  }
}