[kvlonge]

Why

Converted DuckDB SQL printed as one long line, which reads badly in the playground and in convert output. This is a simple layout until a full formatter replaces it after launch.

Changes

• layout_sql (sqlquack-duckdb) changes only the whitespace between tokens:
  • Each clause starts its own line: SELECT, FROM and JOINs, WHERE, GROUP BY, HAVING, QUALIFY, ORDER BY, LIMIT, and set operations.
  • Select items and common table expressions go one per line.
  • Nested queries are indented by depth.
  • A long CASE breaks at WHEN, ELSE and END, unless it sits inside a function call.
  • Statements and subqueries of up to 60 characters stay on one line.
• On by default for convert's text output, the Python API (Conversion.sql) and the playground.
• convert --compact, ConvertOptions(compact=True) and the playground's compact setting keep the single line.
• --json's sql carries what the text output prints: laid out, or on one line with --compact.
• The playground renders translated SQL in a <pre> that keeps its lines and scrolls sideways. That change is the website lane's 40efa91.
• The convert, Python, docs index and quickstart pages show the laid-out output.

Verification

• verify now checks every converted case:
  • The laid-out tokens equal the single-line tokens.
  • Laying out the result again changes nothing.
  • The laid-out SQL replays on DuckDB with the same column names, types and rows, or the same error. Clock-reading results compare names and types only.
• Unit tests pin CTEs, joins, set operations, long and nested CASEs, and keywords inside strings.
• A CLI test covers text, --json, --compact and --compact --json. A Python test covers compact=True against the command line.
• Playground with the real engine at 1280 and 390 px: the statement keeps its lines, scrolls inside the panel, and the page keeps the viewport width.
• make check-ci, make test-rust, make verify-recorded.

[kvlonge]

Gate at ff9ff20 (main cce77ac merged in):

• make check-ci: exit 0
• make test-rust: every suite passed (exit 0)
• make verify-recorded: 11800 cases, 7780 passed, 1031 diverged as expected, 2952 refused, 37 typed, 0 pending, 0 unproven, 0 failed; 220 of 220 equivalences and rules verified. Every converted case also replayed laid out (same tokens, idempotent, same names, types and rows). Translation baseline holds, 0 changes.
• Website: engine rebuilt on this head, npm run test:engine 7/7, site build 0.
• Playground with the real engine at 1280 and 390 px: the translated statement keeps its lines in a <pre> (white-space: pre, overflow-x: auto); at 390 the block scrolls (774 px content in a 340 px box) and the page stays 390 px wide.