# Select API Quickstart Guide [![Slack](https://slack.min.io/slack?type=svg)](https://slack.min.io)

Traditional retrieval of objects is always as whole entities, i.e GetObject for a 5 GiB object, will always return 5 GiB of data. S3 Select API allows us to retrieve a subset of data by using simple SQL expressions. By using Select API to retrieve only the data needed by the application, drastic performance improvements can be achieved.

這也包含 `pydantic.v1`，在 Python 3.14 及以上版本不再支援。

如果你想使用最新的 Python 功能，就需要確保使用 Pydantic v2。

///

如果你的舊 FastAPI 應用仍使用 Pydantic v1，這裡會示範如何遷移到 Pydantic v2，並介紹 **FastAPI 0.119.0** 中可協助你逐步遷移的功能。

## 官方指南 { #official-guide }

Pydantic 提供從 v1 遷移到 v2 的官方[遷移指南](https://docs.pydantic.dev/latest/migration/)。

其中包含變更內容、驗證如何更正確且更嚴格、可能的注意事項等。

你可以先閱讀以更好理解具體變更。

## 測試 { #tests }

確保你的應用有[測試](../tutorial/testing.md)，並在 CI（持續整合）上執行。

port-forward $POD_NAME 9000 --namespace {{ .Release.Namespace }} Read more about port forwarding here: http://kubernetes.io/docs/user-guide/kubectl/kubectl_port-forward/ You can now access MinIO server on http://localhost:9000. Follow the below steps to connect to MinIO server with mc client: 1. Download the MinIO mc client - https://docs.minio.io/docs/minio-client-quickstart-guide 2. export MC_HOST_{{ template "minio.fullname" . }}-local=http://$(kubectl get secret --namespace {{ .Release.Namespace }} {{...

port-forward $POD_NAME 9000 --namespace {{ .Release.Namespace }} Read more about port forwarding here: http://kubernetes.io/docs/user-guide/kubectl/kubectl_port-forward/ You can now access MinIO server on http://localhost:9000. Follow the below steps to connect to MinIO server with mc client: 1. Download the MinIO mc client - https://docs.minio.io/docs/minio-client-quickstart-guide 2. export MC_HOST_{{ template "minio.fullname" . }}-local=http://$(kubectl get secret --namespace {{ .Release.Namespace }} {{...

port-forward $POD_NAME 9000 --namespace {{ .Release.Namespace }} Read more about port forwarding here: http://kubernetes.io/docs/user-guide/kubectl/kubectl_port-forward/ You can now access MinIO server on http://localhost:9000. Follow the below steps to connect to MinIO server with mc client: 1. Download the MinIO mc client - https://docs.minio.io/docs/minio-client-quickstart-guide 2. export MC_HOST_{{ template "minio.fullname" . }}-local=http://$(kubectl get secret --namespace {{ .Release.Namespace }} {{...

port-forward $POD_NAME 9000 --namespace {{ .Release.Namespace }} Read more about port forwarding here: http://kubernetes.io/docs/user-guide/kubectl/kubectl_port-forward/ You can now access MinIO server on http://localhost:9000. Follow the below steps to connect to MinIO server with mc client: 1. Download the MinIO mc client - https://docs.minio.io/docs/minio-client-quickstart-guide 2. export MC_HOST_{{ template "minio.fullname" . }}-local=http://$(kubectl get secret --namespace {{ .Release.Namespace }} {{...

 * complete}. If the computation has already completed when the listener is added, the listener will
 * execute immediately.
 *
 * <p>See the Guava User Guide article on <a
 * href="https://github.com/google/guava/wiki/ListenableFutureExplained">{@code
 * ListenableFuture}</a>.
 *
 * <p>This class is GWT-compatible.
 *
 * <h3>Purpose</h3>
 *

You will learn more about using environment variables for handling **application settings** in the [Advanced User Guide - Settings and Environment Variables](./advanced/settings.md).

## `PATH` Environment Variable { #path-environment-variable }

Vous en apprendrez davantage sur l'utilisation des variables d'environnement pour gérer les **paramètres d'application** dans le [Guide utilisateur avancé - Paramètres et variables d'environnement](./advanced/settings.md).

## Variable d'environnement `PATH` { #path-environment-variable }

# MinIO Server Debugging Guide [![Slack](https://slack.min.io/slack?type=svg)](https://slack.min.io) [![Docker Pulls](https://img.shields.io/docker/pulls/minio/minio.svg?maxAge=604800)](https://hub.docker.com/r/minio/minio/)

## HTTP Trace

HTTP tracing can be enabled by using [`mc admin trace`](https://docs.min.io/community/minio-object-store/reference/minio-mc-admin/mc-admin-trace.html) command.

Example:

```sh
minio server /data
```