# Show HN: Dbctx – Compile a PostgreSQL database into compact, queryable context

> Source: <https://github.com/shrsv/dbctx>
> Published: 2026-08-11 13:53:36+00:00

Hi HN, I've been finding increasing need for helping our users chat with the underlying application data in postgresql directly using LLMs, visualize results and so on.

A major obstacle to this is -- traditional sql schema doesn't contain enough information for an LLM to easily query things in one shot.

For example, traditional schema doesn't say what is the expected/allowed value set in a state field, or what are the paths available embedded in a jsonb field.

Also -- given a user query -- only a small fraction of the whole schema is relevant for an LLM to construct SQL queries. So filtering parts of schema relevant to construct a prompt is important.

dbctx solves all these by inspecting a postgresql database and turning the results into an sqlite backed ".dtx" file. You can pass your natural language query to dtx, and get relevant tables in a compressed schema format along with field/json intelligence embedded in it. This leads to much better responses from the LLM from the getgo.

I have a CLI, library and tiny UI embedded in a single go binary.

Do give it a go, and any feedback welcome.

Comments URL: [https://news.ycombinator.com/item?id=49258397](https://news.ycombinator.com/item?id=49258397)

Points: 3

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