harlequin-questdb
A Harlequin adapter for QuestDB, connecting via QuestDB's PostgreSQL wire protocol.
The package name is harlequin-questdb. The source repository is rhuygen/harlequin-questdb.
Installation
uv tool install harlequin --with harlequin-questdb
Or with pip:
pip install harlequin-questdb
Upgrading
To upgrade Harlequin, the adapter, or both, run:
uv tool upgrade harlequin --with harlequin-questdb
This upgrades harlequin to the latest compatible version and refreshes harlequin-questdb at the same time. Run the same command regardless of which package was bumped. This release requires Harlequin 2.5 or newer.
Usage
Connect to a local QuestDB instance using the defaults (host localhost, port 8812, user admin, password quest):
harlequin -a questdb
An omitted password is quest. Pass --password when the server uses a different one.
harlequin -a questdb --host myserver --port 8812 --username myuser --password mypassword
A libpq connection string supplies host, user, and password on its own. Defaults for those fields are not applied on top of the string:
harlequin -a questdb "host=myserver port=8812 user=myuser password=mypassword dbname=qdb"
The constructor also accepts user as an alias of username. The CLI flag remains --username (-u).
Connection options
| Option | Short | Default | Description |
|---|---|---|---|
--host |
-h |
localhost |
QuestDB host name or IP address |
--port |
-p |
8812 |
PostgreSQL wire protocol port |
--username |
-u |
admin |
QuestDB username |
--password |
quest |
QuestDB password. Omitted values use quest. |
|
--dbname |
-d |
qdb |
Libpq database field. QuestDB ignores logical database names. |
--connect-timeout |
Seconds before connect fails | ||
--sslmode |
disable |
PGWire SSL mode when no connection string is given |
docker-compose.yml publishes QuestDB 8.2.2 on 127.0.0.1:8812 for local development. If localhost resolves to an IPv6 address that the bind does not cover, pass --host 127.0.0.1.
Catalog
The sidebar is a database → schema → relation → column tree. A table partitioned by day is labeled t·DAY. A designated timestamp column is labeled with a star, for example ts★.
Details, time-series examples, and limits are in docs/USER_GUIDE.md and docs/KNOWN_LIMITATIONS.md.
1 maintainer
Metadata
1 maintainer
Release files for harlequin-questdb 0.4.0
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