a pipe for quackheads

🐤 quackpype

QuackPy is a serverless OLAP API built on top of DuckDB exposing HTTP/S and Arrow Flight SQL interfaces

Important

• Easy HTTP API with multiple formats (JSON,CSV,Parquet)
• Powerful Arrow Flight API for modern data clients
• Unlocked Concurrent inserts and querying on DuckDB
• Persistent storage using w/ multiuser authentication
• Native access to any DuckDB Extension & Format
• Embedded SQL Query Interface for instant usage

🌱 Get Started

Run using docker or build from source

docker pull ghcr.io/quackscience/quackpy:latest
docker run -ti --rm -p 8123:8123 -p 8815:8815 ghcr.io/quackscience/quackpy:latest

👉 Usage

See the Examples directory for quick starters

Note

Quackpipe executes queries in :memory: unless authentication details are provided for data persistence

🕸️ HTTP API

Execute DuckDB queries using the HTTP POST/GET API (compatible with the ClickHouse HTTP API)

curl -X POST "http://user:persistence@localhost:8123" \
   -H "Content-Type: application/json" \
   -d 'SELECT version()'  

✈️ FLIGHT API

Execute DuckDB queries using the experimental Flight GRPC API and Airport

Note

Quackpipe executes queries in :memory: unless an authorization header is provided for data persistence

🎫 Take Custom Flights

D SELECT * FROM airport_take_flight('grpc://localhost:8815', 'SELECT 1', headers := MAP{'authorization':'user:password'} );
┌───────┐
│   1   │
│ int32 │
├───────┤
│   1   │
└───────┘

🎫 Take Airport Flights

D select flight_descriptor, endpoint from airport_list_flights('grpc://127.0.0.1:8815', null);
┌─────────────────────────────────┬────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
│        flight_descriptor        │                                                    endpoint                                                    │
│ union(cmd blob, path varchar[]) │           struct(ticket blob, "location" varchar[], expiration_time timestamp, app_metadata blob)[]            │
├─────────────────────────────────┼────────────────────────────────────────────────────────────────────────────────────────────────────────────────┤
│ show_databases                  │ [{'ticket': SHOW DATABASES, 'location': [grpc://localhost:8815], 'expiration_time': NULL, 'app_metadata': }]   │
│ show_version                    │ [{'ticket': SELECT version(), 'location': [grpc://localhost:8815], 'expiration_time': NULL, 'app_metadata': }] │
└─────────────────────────────────┴────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘

D select * from airport_take_flight('grpc://localhost:8815/', ['show_version']);
┌─────────────┐
│ "version"() │
│   varchar   │
├─────────────┤
│ v1.1.3      │
└─────────────┘

🎫 Take Python Flights

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

sql="""SELECT version()"""
  
flight_ticket = Ticket(sql)

token = (b"authorization", bytes(f"user:persistence".encode('utf-8')))
options = FlightCallOptions(headers=[token])
client = FlightClient(f"grpc://localhost:8815")

reader = client.do_get(flight_ticket, options)
arrow_table = reader.read_all()
# Use pyarrow and pandas to view and analyze data
data_frame = arrow_table.to_pandas()
print(data_frame.to_markdown())

|    | "version"()   |
|---:|:--------------|
|  0 | v1.1.3        |

📺 SQL User-Interface

quackpy ships with the DuckDB SQL quack user-interface based on ch-ui

sequenceDiagram
    participant Client
    participant QuackPy
    participant DuckDB


    Client ->> QuackPy: ListFlights
    QuackPy ->> Client: Return Flights Table
    Client ->> QuackPy: GetFlightInfo
    QuackPy ->> DuckDB: DuckDB Execute
    DuckDB ->> QuackPy: Arrow Results Stream
    QuackPy ->> Client: FlightInfo(ticket)
    Client ->> QuackPy: do_get(ticket)
    QuackPy ->> Client: Stream of Results

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🃏 Disclaimers

Footnotes

1. DuckDB ® is a trademark of DuckDB Foundation. All rights reserved by their respective owners. ¹ ↩

2. ClickHouse ® is a trademark of ClickHouse Inc. No direct affiliation or endorsement. ² ↩

3. Released under the MIT license. See LICENSE for details. All rights reserved by their respective owners. ³ ↩

4. Flight implementation inspired by Duck Takes Flight ⁴ ↩