[thekevinbot]

Fixes #1326

Stacked on #1324.

With JSON output (the default when stdout is not a terminal), dirsql query now writes each row as SQLite yields it. Before, it built a HashMap for each row, then a serde_json::Value tree, and then formatted that. The bytes printed are unchanged. A column named twice still gives one key, at its first position, holding the last value.

These keep the old collected path:

• table output
• the server
• statements that call a batched worker, because the worker can force a second run

The text is written once the statement finishes, so a query that fails part-way still prints no rows.

Red commit 0d5aa4b: streamed_rows_keep_one_key_per_repeated_column_name failed in CI because a repeated column's key was written twice.

Measurements

Wall time, best of 3, /usr/bin/time, release builds, #1324 compared with this PR:

Tree	Query	#1324	this PR	find
1M files, flat	SELECT path FROM './*'	0.81s	0.44s	0.43s
1M files, flat	SELECT count(*) FROM './*'	0.38s	0.38s
1.6M files, recursive	SELECT path FROM './**/*.md'	1.32s	0.80s	0.58s
1.6M files, recursive	SELECT count(*) FROM './**/*.md'	0.71s	0.71s

glob_speed_one_level_test.py (#1305) now passes all 3 cases locally.

I compared output from the #1324 binary and this one on 15 queries:

• the 12 queries listed on Path-table walk: read directory names into one buffer #1324
• a duplicate column with an alias
• real, NaN, blob, NULL and quoted-text cells
• an empty result

All 15 are byte-identical.

E2E Verification

• Python: just e2e-attest-python (pytest tests/e2e/): 43 passed. That includes glob_speed_one_level_test.py, so this time nothing was deselected.
• TypeScript: just e2e-attest-ts (pnpm test:e2e) passed.
• Rust: cargo test -p dirsql --features cli --no-fail-fast had one failure, the watcher test server_drops_the_rows_of_a_directory_moved_out_of_the_root. It does not touch this code path and passes when its binary is rerun on its own (47/47).
• By hand:
  • the 15 identical-output queries above
  • the table output on a tty
  • the error path, which prints no rows and exits 1
  • | head -c 20, which closes the pipe without a panic

Changelog / Migrations

• packages/rust/changelog.d/2026-10-05-cli-stream-rows.md
• packages/rust/migrations.d/2026-10-05-cli-stream-rows.md (nothing breaks)