Skip to content

ADBC Driver Foundry

DuckDB Quack

ADBC Driver for DuckDB Quack¶

Driver Version 0.1.0-alpha.3 Release Date 2026-07-27 Tested With DuckDB Quack 1.5

Warning

This is documentation for a prerelease version.

This driver provides ADBC access to a DuckDB server exposed through the Quack remote protocol.

Note

This project is not associated with DuckDB Labs.

Installation & Quickstart¶

The driver can be installed with dbc :

dbc install --pre quack

Connecting¶

from adbc_driver_manager import dbapi

dbapi.connect(
    driver="quack",
    db_kwargs={"uri": "quack://localhost:9494/?token=quack-secret"},
)

Connection String Format¶

Quack URI syntax:

quack://HOST[:PORT]/?token=TOKEN

Components:

Scheme: quack:// (required)
HOST: Quack server host (required)
PORT: Quack server port (optional)
token: shared Quack authentication token (optional)

Feature & Type Support¶

Feature		DuckDB Quack
Bulk Ingestion	Create	✅
	Append	✅
	Create/Append	✅
	Replace	✅
	Temporary Table	❌
	Target Catalog	❌
	Target Schema	❌
	Non-nullable fields are marked NOT NULL	❌
Catalog (GetObjects)	depth=catalogs	✅
	depth=db_schemas	✅
	depth=tables	✅
	depth=columns (all)	✅
Get Parameter Schema		❌
Get Table Schema		❌
Prepared Statements		✅
Transactions		✅

Types¶

Database to Arrow¶

Database Type	DuckDB Quack
BIGINT	int64
BOOLEAN	bool
DATE	date32[day]
DOUBLE PRECISION	double
INT	int32
NUMERIC	decimal128
REAL	float
SMALLINT	int16
TIME	time64[us]
TIMESTAMP	timestamp[us]
TIMESTAMP WITH TIME ZONE	timestamp[us] (with time zone)
VARBINARY	binary
VARCHAR	string

Arrow to Database¶

Arrow Type	DuckDB Quack Type
	Bind	Ingest
	binary	❌	VARBINARY
binary_view	❌	VARBINARY
bool	❌	BOOLEAN
date32[day]	❌	DATE
decimal128	❌	NUMERIC ⚠️ [1]
double	❌	DOUBLE PRECISION
fixed_size_binary	❌	VARBINARY
float	❌	REAL
halffloat	❌	(NA/not tested)
int16	❌	SMALLINT
int32	❌	INT
int64	❌	BIGINT
large_binary	❌	VARBINARY
large_string	❌	VARCHAR
string	❌	VARCHAR
string_view	❌	VARCHAR
time32[ms]	❌	TIME [2]
time32[s]	❌	TIME [2]
time64[ns]	❌	TIME
time64[us]	❌	TIME
timestamp[ms]	❌	TIMESTAMP(3)
timestamp[ms] (with time zone)	❌	TIMESTAMP(3) WITH TIME ZONE [3]
timestamp[ns]	❌	TIMESTAMP(9)
timestamp[ns] (with time zone)	❌	TIMESTAMP(9) WITH TIME ZONE [3]
timestamp[s]	❌	TIMESTAMP(0)
timestamp[s] (with time zone)	❌	TIMESTAMP(0) WITH TIME ZONE [3]
timestamp[us]	❌	TIMESTAMP(6)
timestamp[us] (with time zone)	❌	TIMESTAMP(6) WITH TIME ZONE

Compatibility¶

This driver was tested on:

DuckDB Quack 1.5.5

Previous Versions¶

To see documentation for previous versions of this driver, see the following: