Posts
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Aix: Efficiently storing and querying chess game collections
The Lichess database contains over 7 billion chess games played on Lichess. To make it easier to query these games, I have released the open-source Aix extension for DuckDB and the accompanying Aix-compatible Lichess database.
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Writing scalar functions in DuckDB extensions
The analytical database system DuckDB offers an extension mechanism allowing you to add your own functionality to the system. The C++ extension template provides a starting point for extensions and contains two example scalar functions. This blog post goes into more detail on how to write such functions.
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