---
title: Apache Arrow Flight RPC clients
description: Flight clients are language-specific drivers that can interact with Flight servers using the Arrow in-memory format and the Flight RPC framework. View the list of available clients.
url: https://docs.influxdata.com/influxdb3/enterprise/reference/client-libraries/flight/
estimated_tokens: 3844
product: InfluxDB 3 Enterprise
version: enterprise
---

# Apache Arrow Flight RPC clients

Flight RPC and Flight SQL clients are language-specific drivers that interact with databases using the Arrow in-memory format and the Flight RPC protocol. Apache Arrow Flight RPC and Flight SQL protocols define APIs for servers and clients.

#### Use InfluxDB 3 client libraries

We recommend using [InfluxDB 3 client libraries](/influxdb3/enterprise/reference/client-libraries/v3/) for integrating InfluxDB 3 with your application code. Client libraries wrap Apache Arrow Flight clients and provide convenient methods for [writing](/influxdb3/enterprise/write-data/client-libraries/), [querying](/influxdb3/enterprise/query-data/execute-queries/client-libraries), and processing data stored in InfluxDB 3 Enterprise.

**Flight RPC clients** can use SQL or InfluxQL to query data stored in an InfluxDB 3 Enterprise database. Using InfluxDB 3’s IOx-specific Flight RPC protocol, clients send a single `DoGet()` request to authenticate, query, and retrieve data.

**Flight SQL clients** use the [Flight SQL protocol](https://arrow.apache.org/docs/format/FlightSql.html) for querying an SQL database server. They can use SQL to query data stored in an InfluxDB 3 Enterprise database, but they can’t use InfuxQL.

#### Flight SQL requires HTTP/2

Flight SQL uses gRPC, which requires **HTTP/2**. If you connect to InfluxDB 3 Enterprise through a proxy (such as HAProxy, nginx, or a load balancer), verify that your proxy is configured to support HTTP/2. Without HTTP/2 support, Flight SQL connections will fail.

Clients are maintained by Apache Arrow projects or third-parties. For specifics about a Flight client, see the client’s GitHub repository.

### [C# .NET Flight client](/influxdb3/enterprise/reference/client-libraries/flight/csharp-flight/)

The C# .NET Flight client integrates with C# .NET scripts and applications to query data stored in InfluxDB.

### [Go Flight client](/influxdb3/enterprise/reference/client-libraries/flight/go-flight/)

The Go Flight client integrates with Go scripts and applications to query data stored in InfluxDB.

### [Java Flight SQL package](/influxdb3/enterprise/reference/client-libraries/flight/java-flightsql/)

The Java Flight SQL client integrates with Java applications to query and retrieve data from Flight database servers using RPC and SQL.

```java
public class Query {
    public static void main(String[] args) {       
        String query = "SELECT * FROM home";
        Location location = Location.forGrpcTls(HOST, 443);

        CredentialCallOption auth = new CredentialCallOption(new BearerCredentialWriter(TOKEN));
        BufferAllocator allocator = new RootAllocator(Long.MAX_VALUE);

        FlightClientMiddleware.Factory f = info -> new FlightClientMiddleware() {
            @Override
            public void onBeforeSendingHeaders(CallHeaders outgoingHeaders) {
                outgoingHeaders.insert(DATABASE_FIELD, DATABASE_NAME);
            }
        };

        FlightClient client = FlightClient.builder(allocator, location)
                .intercept(f)
                .build();
        FlightSqlClient sqlClient = new FlightSqlClient(client);
        FlightInfo flightInfo = sqlClient.execute(query, auth);
    }
}
```

### [Python Flight client](/influxdb3/enterprise/reference/client-libraries/flight/python-flight/)

The Python Flight client integrates with Python scripts and applications to query data stored in InfluxDB.

```py
from pyarrow.flight import FlightClient, Ticket, FlightCallOptions 
import json
import pandas
import tabulate

# Downsampling query groups data into 2-hour bins
sql="""
  SELECT DATE_BIN(INTERVAL '2 hours',
      time,
      '1970-01-01T00:00:00Z') AS time,
    room,
    selector_max(temp, time)['value'] AS 'max temp',
    selector_min(temp, time)['value'] AS 'min temp',
    avg(temp) AS 'average temp'
  FROM home
  GROUP BY
    1,
    room
  ORDER BY room, 1"""
  
flight_ticket = Ticket(json.dumps({
  "namespace_name": "DATABASE_NAME",
  "sql_query": sql,
  "query_type": "sql"
}))

token = (b"authorization", bytes(f"Bearer DATABASE_TOKEN".encode('utf-8')))
options = FlightCallOptions(headers=[token])
client = FlightClient(f"grpc+tls://localhost:8181:443")

reader = client.do_get(flight_ticket, options)
arrow_table = reader.read_all()
```

### [Python Flight SQL DBAPI client](/influxdb3/enterprise/reference/client-libraries/flight/python-flightsql-dbapi/)

The Python `flightsql-dbapi` library uses SQL and the Flight SQL protocol to query data stored in an InfluxDB Core database.

[client libraries](/influxdb3/enterprise/tags/client-libraries/) [Flight RPC](/influxdb3/enterprise/tags/flight-rpc/) [Flight SQL](/influxdb3/enterprise/tags/flight-sql/)