gpsamson / tap-duckdb

tap-duckdb

DuckDB tap class.

Built with the Meltano Singer SDK.

Capabilities

• catalog
• state
• discover
• about
• stream-maps
• schema-flattening

Settings

Setting	Required	Default	Description
path	True	None	Path to .duckdb file
stream_maps	False	None	Config object for stream maps capability. For more information check out Stream Maps.
stream_map_config	False	None	User-defined config values to be used within map expressions.
flattening_enabled	False	None	'True' to enable schema flattening and automatically expand nested properties.
flattening_max_depth	False	None	The max depth to flatten schemas.

A full list of supported settings and capabilities is available by running: tap-duckdb --about

Configure using environment variables

This Singer tap will automatically import any environment variables within the working directory's .env if the --config=ENV is provided, such that config values will be considered if a matching environment variable is set either in the terminal context or in the .env file.

Source Authentication and Authorization

Usage

You can easily run tap-duckdb by itself or in a pipeline using Meltano.

Executing the Tap Directly

tap-duckdb --version
tap-duckdb --help
tap-duckdb --config CONFIG --discover > ./catalog.json

Developer Resources

Follow these instructions to contribute to this project.

Initialize your Development Environment

pipx install poetry
poetry install

Create and Run Tests

Create tests within the tap_duckdb/tests subfolder and then run:

poetry run pytest

You can also test the tap-duckdb CLI interface directly using poetry run:

poetry run tap-duckdb --help

Testing with Meltano

Note: This tap will work in any Singer environment and does not require Meltano. Examples here are for convenience and to streamline end-to-end orchestration scenarios.

Next, install Meltano (if you haven't already) and any needed plugins:

# Install meltano
pipx install meltano
# Initialize meltano within this directory
cd tap-duckdb
meltano install

Now you can test and orchestrate using Meltano:

# Test invocation:
meltano invoke tap-duckdb --version
# OR run a test `elt` pipeline:
meltano elt tap-duckdb target-jsonl

SDK Dev Guide

See the dev guide for more instructions on how to use the SDK to develop your own taps and targets.