CST-based SQL formatter following sqlstyle.guide conventions.

This crate provides SQL formatting that preserves the structure of the original code while applying consistent style rules.

Stability

Pre-1.0. The intended public surface is the format / format_sqlstyle / format_with_pgformatter entry points, the edit helpers (format_edits, format_range, diff_edits, TextEdit) and the config types (FormatConfig, PgFormatterConfig, …). Printer internals may change without a semver bump.

Features

• River alignment for keyword alignment
• Configurable keyword case (UPPER, lower, Preserve)
• Leading or trailing comma style
• Proper indentation for subqueries and CTEs
• Comment preservation
• Error node preservation (malformed SQL preserved as-is)

Usage

use banshee_format::{format, FormatConfig};

let sql = "select id,name from users where active=true";
let formatted = format(sql, &FormatConfig::sqlstyle());

println!("{}", formatted);
// Output:
//     SELECT id
//          , name
//       FROM users
//      WHERE active = TRUE