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Comment by emmanuel_1234 | Hacker News Reader

Any recommendation for a prettifier / SQL linter?

I'm curious about this for DuckDB [1]. In the last couple months or so I've been using DuckDB as a one-step solution to all problems I solve. In fact my development environment rarely requires anything other than Python and DuckDB (and some Rust if native code is necessary). DuckDB is an insanely fast and featureful analytic db. It'd be nice to have a linter, formatter etc specifically for DuckDB.

There is sqlfluff etc but I'm curious what people use.

[1] DuckDB SQL dialect is very close to Postgres, it's compatible in many ways but has some extra QOL features related to analytics, and lacks a few features like `vacuum full`;

sqlfluff is better than https://github.com/darold/pgFormatter , but it can get confused at times.

Since you're using python, have you looked into sqlglot? I think it has some pretty-print options.

https://github.com/tobymao/sqlglot

IDEA if you want to use it for other things (or any other JetBrains IDE). Nothing comes close feature-wise.

If you don't:

- https://www.depesz.com/2022/09/21/prettify-sql-queries-from-...

- https://gitlab.com/depesz/pg-sql-prettyprinter

Or https://paste.depesz.com for one-off use.

i think the idea sql prettifier is pretty silly sometimes. it really likes indenting stuff to make sure things are aligned, which often results in dozens of whitespaces

It makes it easy to distinguish null vs not null columns and other similar things, so I personally don't mind.

It's more about queries like (dummy example)

    RETURN CASE
               WHEN a = 1 THEN 1
               ELSE 2
        END;

where it insists on aligning WHEN past CASE. I think it would be perfectly reasonable to indent WHEN and ELSE 4 spaces less, for example. Similar things happen with nested conditions like (a or (b and c)) all getting pushed to the right

prettier plugin sql, or pg_format

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