[robobun]

Fixes #32038

Problem

• sql.close({ timeout: 0 }) is documented to close at once. With a query in flight it waits like a plain close(), forever if the peer never answers.
• Cause: BaseSQLAdapter.close() (src/js/internal/sql/shared.ts) used const hasTimeout = !!timeout;. 0 is falsy, so the timeout === 0 branch was unreachable.

Fix

• Gate on presence: timeout != null. 0 closes now, undefined and null still drain.
• Query is unchanged. The earlier synchronous enqueue in .then() is gone: it sent a query started inside onclose to a dead connection (Notes).
• The tests hold a query at a mock server, call close(), then answer. A forced close has already rejected the query. A close that waits lets it resolve, so a wrong wait fails an assertion.
• Verified: test/js/sql/sql-close-pending-connection.test.ts (24 pass, and 8 fail on an assertion with main's shared.js). Also test/js/sql/ and the src/js typecheck.

Background

• Considered fixes in Query.then(), in how close() samples pending queries, and in #finishClose. The same-tick drain belongs in close() and needs its own decision. This PR ships only the gate (revives sql: make close({ timeout: 0 }) force-close immediately with queries in flight #32039).
• Over TLS a forced close can still wait for the peer's close_notify. sql: close a TLS socket at once instead of waiting for the peer's close_notify #41711 owns that.

Downsides

• close({ timeout: NaN }) now rejects with ERR_INVALID_ARG_VALUE and leaves the pool open. Before, it closed gracefully. false and "" now force-close. 10 of 32 spelling cells differ (Notes).
• Cost: close() 117 to 116 bytecode instructions, live cells per close unchanged, release .bun_builtins +6 B (size -A).

Notes

Measurements. Same debug binary for every A/B row: only the bundled build/debug/js/internal/sql/shared.js is swapped between main (2838e1b) and this PR.

• bundled JS: query.js identical to main (7126 B). sqlite.js and bun/sql.js have identical sources. shared.js 49141 to 49147 B (+6).
• close(): async wrapper 40 to 40 bytecode instructions (250 B). Body 117 to 116 instructions (646 to 643 B). !!timeout costs two ops, timeout != null costs one. From BUN_JSC_dumpGeneratedBytecodes=1 on the real built-in.
• live cells per close(): Promise 1.00 to 1.00, Function 27.9 to 27.9 (N=200 and 400, 3 processes, graceful and forced, identical). The functions belong to each retained new SQL() object.
• spelling matrix: 10 of 32 cells differ from main, 5 per adapter. With a query in flight: 0, false, "" (drained, now forced) and NaN (resolved, now ERR_INVALID_ARG_VALUE). On an idle pool: only NaN. "0", undefined, null and -1 are unchanged in both states.
• native TLS close: not measured here, sql: close a TLS socket at once instead of waiting for the peer's close_notify #41711 owns that step.
• release binary: .bun_builtins 2614085 to 2614091 B (+6), total +6 B (size -A). The file size is unchanged (80827936 B).
• fail-before: with main's shared.js, the 8 new tests for 0, false, "" and NaN fail on the toEqual assertion in about 0.1 s each. The 8 older tests that now pass the number 0 time out, because they need the gate to settle. With this PR: 24 of 24 pass, 3.8 s for the file.
• The bun on PATH in the work container was a build of this PR's earlier head (1.4.3-canary.1+958079c4e), so it already had the gate and passed everything. That is why the fail-before uses main's shared.js.

Scope change. Until afe2234 this PR also made Query.then(), .catch() and .finally() hand the query to the pool synchronously, so that a query started in the same tick as close() was drained. That half is removed. Measured against main:

• It did not cover await q or Promise.all([q, sql.close()]). The engine calls q.then() from a promise job, after the synchronous close().
• Regression: after the server drops an idle pooled connection, a query started inside onclose with .then() or .catch() rejected with connection must be a PostgresSQLConnection. On main, and on this PR now, it reconnects and resolves (checked again on 3c866e5).
• q.then(); q.cancel() in one tick sent the query and resolved with rows. On main it rejects with ERR_POSTGRES_QUERY_CANCELLED.

Not addressed here (all present on main).

• Same-tick drain: a lazy query started in the same tick as close() or end() is rejected unsent, for every spelling. The spellings converge in close(), which samples hasPendingQueries() once, synchronously. A fix there has open questions (how long to keep accepting hand-offs, and close() would stop marking the pool closed synchronously), so it needs a maintainer decision.
• #finishClose runs the user's onclose before it removes the dead slot from readyConnections, so .execute() inside onclose rejects with connection must be a PostgresSQLConnection.
• q.cancel() before the first await q leaves the promise pending forever: #run() returns on the cancelled bit and does not reject.
• A second close({ timeout: 0 }) after a graceful close has parked is a resolved no-op (if (this.closed) return). tx.close({ timeout: 0 }) still waits for its in-flight query.
• reserved.close() and the transaction close() (src/js/bun/sql.ts) still gate on if (timeout). 0 already closes at once there, so Bun.SQL: close({ timeout: 0 }) does not close immediately when queries are pending #32038 does not occur, but NaN skips validation on those two paths while the pool now rejects it.

Overlap with open PRs. #41711 adds tests to sql-close-pending-connection.test.ts and extends the same import block. #32100 moves the timeout validation of all three close() sites into one helper and edits the lines next to the gate. Whichever lands second needs a small merge.

Local runs. test/js/sql/: 887 pass, 30 fail, the same 30 as on main in this container (28 are the local MariaDB refusing the root login, 2 are postgres-string-leak.test.ts, whose fixtures need 6 to 9 s in a debug ASAN build against a 5 s default). The server-backed cases in sql.test.ts and sql-mysql.test.ts are docker-gated and run in CI only. This PR no longer changes those files.

---

[human-review] gate passed · iteration 1 · 4 files touched

fails on main (without fix)

ASAN without fix: 18 FAILED
$ BUN_DEBUG_QUIET_LOGS=1 bun scripts/build.ts --profile=debug --quiet test "--reporter=junit" "--reporter-outfile=/tmp/pr_gate.xml" test/js/sql/sql-close-pending-connection.test.ts test/js/sql/sql-onconnect-onclose-throw.test.ts
bun test v1.4.3 (367d939d9)

test/js/sql/sql-close-pending-connection.test.ts:
(fail) postgres: forced close() resolves while a connection is mid-handshake [5000.58ms]
  ^ this test timed out after 5000ms.
(fail) postgres: close() does not fire onclose for slots that never connected [5000.71ms]
  ^ this test timed out after 5000ms.
(fail) postgres: forced close() resolves when called before the native handle is stored [5000.64ms]
  ^ this test timed out after 5000ms.
(fail) mysql: forced close() resolves while a connection is mid-handshake [5000.68ms]
  ^ this test timed out after 5000ms.
(fail) mysql: close() does not fire onclose for slots that never connected [5000.69ms]
  ^ this test timed out after 5000ms.
(fail) mysql: forced close() resolves when called before the native handle is stored [5000.45ms]
  ^ this test timed out after 5000ms.
(fail) postgres: close() mid-reconnect does not fire onclose for the unfinished cycle [5000.63ms]
 
... (truncated)

release without fix: 18 FAILED
bun test v1.4.3-canary.1 (367d939d9)

test/js/sql/sql-close-pending-connection.test.ts:
(fail) postgres: forced close() resolves while a connection is mid-handshake [5000.33ms]
  ^ this test timed out after 5000ms.
(fail) postgres: close() does not fire onclose for slots that never connected [5000.97ms]
  ^ this test timed out after 5000ms.
(fail) postgres: forced close() resolves when called before the native handle is stored [5001.41ms]
  ^ this test timed out after 5000ms.
(fail) mysql: forced close() resolves while a connection is mid-handshake [5001.52ms]
  ^ this test timed out after 5000ms.
(fail) mysql: close() does not fire onclose for slots that never connected [5000.96ms]
  ^ this test timed out after 5000ms.
(fail) mysql: forced close() resolves when called before the native handle is stored [5001.98ms]
  ^ this test timed out after 5000ms.
(fail) postgres: close() mid-reconnect does not fire onclose for the unfinished cycle [5001.96ms]
  ^ this test timed out after 5000ms.
(fail) pool scans tolerate unassigned connection slots during pool start [5119.15ms]
  ^ this test timed out after 5000ms.
287 |         const close = sql.close({ timeout: timeout as 
... (truncated)

passes on PR (with fix)

ASAN with fix: all passed
$ BUN_DEBUG_QUIET_LOGS=1 bun scripts/build.ts --profile=debug --quiet test "--reporter=junit" "--reporter-outfile=/tmp/pr_gate.xml" test/js/sql/sql-close-pending-connection.test.ts test/js/sql/sql-onconnect-onclose-throw.test.ts
rustup spent 5s installing the pinned toolchain (nightly-2026-09-15); it was missing or incomplete on this machine
bun test v1.4.3 (367d939d9)

test/js/sql/sql-close-pending-connection.test.ts:
(pass) postgres: forced close() resolves while a connection is mid-handshake [1117.02ms]
(pass) postgres: close() does not fire onclose for slots that never connected [132.64ms]
(pass) postgres: forced close() resolves when called before the native handle is stored [21.77ms]
(pass) mysql: forced close() resolves while a connection is mid-handshake [38.15ms]
(pass) mysql: close() does not fire onclose for slots that never connected [22.63ms]
(pass) mysql: forced close() resolves when called before the native handle is stored [9.10ms]
(pass) postgres: close() mid-reconnect does not fire onclose for the unfinished cycle [103.79ms]
(pass) pool scans tolerate unassigned connection slots during pool start [21.11ms]
(pass) postgres: close({ timeout: 0 }) wit
... (truncated)

release with fix: all passed
$ bun scripts/build.ts --profile=release
[configured] bun-profile → bun (stripped)
  target       linux-x64-gnu
  build type   Release
  build dir    ./build/release
  revision     f0455db53d
  features     lto, baseline

23 deps, 136 codegen, 1176 objects in 11929ms

ninja: Entering directory `/workspace/bun/build/release'
[1/4] fetch lolhtml
[lolhtml] up to date
[2/4] fetch rust-argon2
[rust-argon2] up to date
[2/4] cargo plan → /workspace/bun/build/release/rust-target/plan.json
244 units: 172 lib, 16 proc-macro (host), 19 custom-build (host), 15 run custom-build, 17 lib (host), 4 run custom-build (host), 1 rlib
[3/4] reconfigure
rustup spent 8s installing the pinned toolchain (nightly-2026-09-15); it was missing or incomplete on this machine
[1/1499] rustc build_script_build 
[2/1499] rustc build_script_build 
[3/1499] rustc build_script_build 
[4/1499] mkdir stamps
[5/1499] mkdir codegen
[6/1499] rustc build_script_build 
[7/1499] rustc build_script_build 
[8/1499] rustc unicode_ident 
[9/1499] build.rs build_script_build
[10/1499] build.rs build_script_build
[11/1499] build.rs build_script_build
[12/1499] rustc heck 
[13/1499] rustc unicode_xid 
[14/1499] b
... (truncated)

diff hotspot

docs/runtime/sql.mdx                             |   2 +
 src/js/internal/sql/shared.ts                    |   3 +-
 test/js/sql/sql-close-pending-connection.test.ts | 131 +++++++++++++++++++++--
 test/js/sql/sql-onconnect-onclose-throw.test.ts  |   2 +-
 4 files changed, 129 insertions(+), 9 deletions(-)

gate history · 5 passed · 0 rejected · iteration 1

evidence per changed file

file                                              reads  edits  tests
docs/runtime/sql.mdx                                  1      1     46
src/js/internal/sql/shared.ts                         6      5     50
test/js/sql/sql-close-pending-connection.test.ts      6      7     44
test/js/sql/sql-onconnect-onclose-throw.test.ts       0      0      5

[coderabbitai]

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---

Walkthrough

close() now recognizes timeout: 0 as an explicit timeout and closes with pending queries. undefined and null retain graceful draining. PostgreSQL and MySQL tests cover timeout values and in-flight query outcomes. The connection-pooling documentation describes timeout units and query errors.

Changes

SQL shutdown lifecycle

Layer / File(s)	Summary
Explicit close timeout handling src/js/internal/sql/shared.ts, test/js/sql/sql-close-pending-connection.test.ts, test/js/sql/sql-onconnect-onclose-throw.test.ts, docs/runtime/sql.mdx	close() treats timeout: 0 as supplied. PostgreSQL and MySQL mock tests cover in-flight queries across timeout values. Existing forced-close test calls use numeric 0. Documentation states that timeouts are measured in seconds and describes the error for queries interrupted by close.

Suggested reviewers: alii

Priority: ⬇️ Low

Severity of issue fixed: Low

Merge Risk: ⚪ Minimal · up to 3c866

Zero-timeout close now takes the intended immediate-close path. No actionable merge-blocking risk is established beyond normal validation.

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	The change satisfies #32038. BaseSQLAdapter.close() now treats non-null timeout as present, so timeout: 0 reaches the immediate-close path. The PostgreSQL and MySQL tests hold an in-flight query…
Out of Scope Changes check	✅ Passed	The changes stay within the SQL close-timeout scope of #32038. The timeout tests, driver mock support, documentation update, and numeric timeout: 0 regression-test updates support close behavior. No…
Title check	✅ Passed	The title clearly and concisely describes the primary change: making close({ timeout: 0 }) close immediately by checking timeout presence.
Description check	✅ Passed	The description explains the problem, root cause, fix, scope, trade-offs, and verification results. It does not use the exact template headings, but it contains the required information and is complet…

---

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[robobun]

^{Updated 11:31 PM PT - Sep 30th, 2026}

✅ @robobun, your commit f0455db53d2c1077be1ba38d731627ecdeeebf82 passed in Build #122214! 🎉

---

🧪   To try this PR locally:

bunx bun-pr 33740

That installs a local version of the PR into your bun-33740 executable, so you can run:

bun-33740 --bun

[github-actions]

Found 1 issue this PR may fix:

1. Bun.SQL: close({ timeout: 0 }) does not close immediately when queries are pending #32038 - This PR directly fixes the if (timeout) falsy-zero bug in BaseSQLAdapter.close() by changing it to if (timeout != null), making close({ timeout: 0 }) correctly take the force-close path

If this is helpful, copy the block below into the PR description to auto-close this issue on merge.

Fixes #32038

🤖 Generated with Claude Code

[github-actions]

This PR may be a duplicate of:

1. sql: make close({ timeout: 0 }) force-close immediately with queries in flight #32039 - Also fixes Bun.SQL: close({ timeout: 0 }) does not close immediately when queries are pending #32038 with the same if (timeout) → if (timeout != null) change in BaseSQLAdapter.close(); sql: close({ timeout: 0 }) closes at once (gate on presence, not truthiness) #33740 is a superset that additionally removes the microtask deferral in Query.#runAsync()

🤖 Generated with Claude Code

[robobun]

The shared.ts change here is identical to #32039 (both gate on timeout != null so { timeout: 0 } reaches the documented fast-close path). That change is required here: once .then() enqueues synchronously, the existing Connection destroyed with query before tests in sql.test.ts / sql-mysql.test.ts would otherwise start passing for the wrong reason (graceful drain instead of forced close).

#32039 has a dedicated mock-server test for the { timeout: 0 } behaviour that this PR does not duplicate; either can land first.

[claude]

Thanks for collapsing #runAsync() into a #run() delegate — that addresses my earlier nit. I'm deferring the final call to a human since removing the microtask deferral changes when the pool handler runs relative to .then() callers, which is subtle enough to warrant a second pair of eyes.

Extended reasoning...

Overview

Two source changes plus tests across three adapters:

• src/js/internal/sql/query.ts: #runAsync() no longer does await Promise.$resolve() before invoking the pool handler; it now delegates directly to #run(), so .then()/.catch()/.finally() enqueue the query synchronously (matching .execute()).
• src/js/internal/sql/shared.ts: close() now checks timeout != null instead of truthy timeout, so { timeout: 0 } reaches the documented force-close branch.
• New tests in sql.test.ts, sql-mysql.test.ts, sqlite-sql.test.ts, plus an unrelated debug-build iteration shrink in sqlite-sql.test.ts.

My earlier inline nit (the #run()/#runAsync() duplication) was addressed in 062e3cf and the thread is resolved.

Security risks

None. No auth, crypto, or untrusted-input parsing is touched; the timeout != null change only affects which branch of an already-validated close path is taken.

Level of scrutiny

Medium. The line count is tiny, but dropping the microtask deferral is a timing/ordering change inside a lazy-Promise subclass's .then() path that fans out to every SQL adapter's pool handler. The original await Promise.$resolve() may have been incidental, or it may have been load-bearing for some ordering assumption (e.g., letting .then() return before the handler can synchronously re-enter or call back into user code). The PR description argues re-entry is guarded by the executed status flag and the existing test suite passes, which is reassuring, but this is exactly the kind of change where a maintainer familiar with the pool's history should confirm nothing else depended on the deferral.

Other factors

• Overlaps with #32039 on the timeout != null fix; the author has already noted either can land first.
• Tests are well-placed next to the existing .execute() cases and the SQLite one runs without a container.
• No bugs surfaced by the automated review.

[claude]

No issues found and the dedup nit is addressed, but removing the microtask deferral from Query.then() changes execution timing on the hot path for every SQL adapter — worth a human sanity-check on re-entrancy (e.g. bindQuery's query.finally() now recursing synchronously) before landing.

Extended reasoning...

Overview

Two source changes plus tests:

• src/js/internal/sql/query.ts: #runAsync() now delegates directly to #run(), dropping the await Promise.$resolve() that previously deferred the pool hand-off by one microtask. This means .then()/.catch()/.finally() on a Query now invoke the pool handler synchronously before returning, matching .execute().
• src/js/internal/sql/shared.ts: BaseSQLAdapter.close() gates on timeout != null instead of if (timeout), so the documented { timeout: 0 } force-close reaches the fast-close branch.
• Tests added across SQLite / Postgres / MySQL for the same-tick-close case, plus a debug-build iteration reduction in sqlite-sql.test.ts.

My earlier inline nit (dedupe #runAsync/#run) was addressed in 062e3cf.

Security risks

None. No auth, crypto, or untrusted-input parsing is touched; the timeout != null change only affects control flow inside an already-validated numeric option.

Level of scrutiny

Moderate–high. The shared.ts one-liner is trivially correct. The query.ts change, however, alters observable timing on the single code path every awaited SQL query flows through, across all three adapters. Removing a deliberate-looking microtask hop from a Promise subclass's .then() is the kind of change where second-order effects (re-entrancy, ordering assumptions in the pool) are easy to miss:

• bindQuery() calls query.finally(...), which now synchronously re-enters #runAsyncAndCatch() → #run() while the outer handler(this, handle) call is still on the stack. The SQLQueryStatus.executed guard makes this a no-op, and the PR description calls this out — but it's exactly the sort of invariant a maintainer familiar with the pool should confirm.
• Any caller that relied (intentionally or not) on the query being enqueued after the current microtask now sees it enqueued before.

Other factors

• Overlaps with open PR #32039 on the timeout != null change; the author has explained the relationship in-thread.
• The PR description is thorough, fail-before is verified, and tests cover the fix across every adapter — the diligence is high.
• No CODEOWNERS entry covers these files.

Given the subtlety of the timing change on a shared hot path, deferring to a human reviewer rather than auto-approving.

[robobun]

CI status: the napi > napi_wrap > has the right lifetime failure on Windows 2019 x64 is hitting every concurrent PR build right now (70430, 70431, 70437, 70439, 70440, 70441, 70444, 70446, 70448, 70449), including branches that touch zlib, semver, url, sockets, and http, none of which share code with this diff. The previous build (70417) failed only on a darwin-14-aarch64-test-bun job that expired waiting for an agent.

This diff touches src/js/internal/sql/{query,shared}.ts and the corresponding test/js/sql/ files only. All test/js/sql/ lanes that have completed are green. Ready for review.

[claude]

Thanks for addressing the dedup nit. I'm deferring to a human here since removing the microtask deferral changes dispatch timing for every await sql call across all three adapters — the reasoning looks sound, but this and the overlap with #32039 are worth a maintainer's eyes.

Extended reasoning...

Overview

Two source changes plus tests:

• src/js/internal/sql/query.ts: #runAsync() no longer does await Promise.$resolve() before invoking the pool handler; it now delegates directly to #run(), so .then()/.catch()/.finally() enqueue the query synchronously (same as .execute()).
• src/js/internal/sql/shared.ts: BaseSQLAdapter.close() gates on timeout != null instead of if (timeout), so { timeout: 0 } reaches the documented force-close branch.
• New tests in sql.test.ts, sql-mysql.test.ts, sqlite-sql.test.ts, plus a debug-build iteration shrink in sqlite-sql.test.ts.

My earlier inline nit (dedup #runAsync with #run) was addressed in 062e3cf and the thread is resolved.

Security risks

None. No untrusted input parsing, auth, crypto, or filesystem paths are touched. The timeout != null change only affects which internal close branch is taken.

Level of scrutiny

Moderate–high. The diff is small and the root-cause analysis is thorough, but the query.ts change alters microtask ordering for the hot path shared by every await sql\...`across Postgres/MySQL/SQLite. The handler now runs *synchronously inside*.then(), which means pool.connect()→onConnected→handle.run()can all fire beforesuper.$thenis called. Re-entry viabindQuery's query.finally()is guarded bySQLQueryStatus.executed, and the PR description explains why the shared.tschange is required to keep the existingConnection destroyed with query before` tests correct — but timing changes in shared promise machinery are exactly where subtle regressions hide, so a maintainer familiar with the pool lifecycle should confirm.

Other factors

• Overlaps with open PR #32039 (same timeout != null fix, with a dedicated mock-server test this PR doesn't duplicate). A human should decide sequencing.
• Bug-hunting system found nothing; tests are added alongside existing coverage in the right files and the author verified fail-before with USE_SYSTEM_BUN=1.
• CI build #70449 was still in progress at last update.

[claude]

I reviewed this and didn't find any bugs. The two source changes are small and well-reasoned, but removing the microtask deferral in Query.#runAsync() changes when the pool handler runs relative to user code calling .then(), so a human sign-off on the ordering change would be worthwhile. There's also an open comment-cop flag on the two-line comment at query.ts:131-132 that a maintainer should adjudicate (it reads as a false positive to me — the comment explains a non-obvious choice, not a workaround).

What was reviewed

• #runAsync() now delegates to #run(); re-entry via bindQuery's query.finally() is guarded by the executed status flag set before the handler runs.
• close({ timeout }): timeout != null correctly routes 0 to the force-close branch and still treats null/undefined as drain-with-no-timer; the new mock-server tests cover both.
• #runAsyncAndCatch()'s runPromise !== this guard still holds — the async wrapper returns a fresh promise even when #run() returns this.

Extended reasoning...

Overview

Two source changes in src/js/internal/sql/: (1) Query.#runAsync() drops await Promise.$resolve() and now delegates to #run(), so .then()/.catch()/.finally() hand the query to the pool synchronously (matching .execute()); (2) BaseSQLAdapter.close() gates the timeout branch on timeout != null instead of truthiness, so the documented { timeout: 0 } reaches the force-close path. Tests are added for SQLite, Postgres, and MySQL, plus mock-server coverage in sql-close-pending-connection.test.ts for both { timeout: 0 } and { timeout: null } with a query in flight.

Security risks

None. No untrusted input parsing, no auth/crypto. The changes are internal query-lifecycle ordering and an option-presence check.

Level of scrutiny

Medium-high. The timeout != null fix is a textbook falsy-zero bug and low risk. Removing the microtask deferral is a small diff but a real behavioral change: the pool handler (which can call connection.bindQuery, which calls query.finally() back on the same query) now runs synchronously inside the user's .then() call. The re-entrancy is handled by the SQLQueryStatus.executed bit set before the handler is invoked, and .execute() has always taken this synchronous path, so the code path itself is proven — but the change in when it runs relative to surrounding user code is the kind of thing that can surface subtle ordering bugs that unit tests don't catch. That warrants a human look.

Other factors

• My earlier nit (dedupe #runAsync with #run) was addressed in 062e3cf; that thread is resolved.
• The async wrapper still returns a fresh promise (never this), so #runAsyncAndCatch()'s runPromise !== this check and its .catch(() => {}) unhandled-rejection guard are unchanged in effect.
• comment-cop flagged the two-line comment on #runAsync() today; it's short and explains why an async method enqueues synchronously, which seems like exactly the non-obvious decision worth a comment. A maintainer should decide whether to trim it or dismiss the flag.
• The isDebug ? 1000 : 10000 iteration reduction in sqlite-sql.test.ts addresses a pre-existing debug-ASAN timeout the PR description mentions; unrelated to the fix but reasonable.

[claude]

I reviewed this PR and the bug-hunting pass found no issues. Because the core change removes the microtask deferral in Query#runAsync() — shifting when every awaited query is handed to the pool from one-microtask-later to synchronously inside .then() — a human look at the timing/re-entrancy implications would still be worthwhile.

What was reviewed:

• Re-entry from bindQuery's query.finally() during the now-synchronous handler call — guarded by the SQLQueryStatus.executed mask in #run().
• #runAsyncAndCatch()'s runPromise !== this guard — still holds because the async wrapper returns a fresh promise even when #run() returns this.
• close({ timeout: 0 }) vs close({ timeout: null }) after the timeout != null gate — both paths covered by the new mock-server tests; imported wire-frames.ts helpers all exist.

Extended reasoning...

Overview

Two source changes: src/js/internal/sql/query.ts collapses #runAsync() into a one-line async delegator to #run(), dropping the await Promise.$resolve() that deferred the pool hand-off by one microtask; src/js/internal/sql/shared.ts changes if (timeout) to if (timeout != null) in BaseSQLAdapter.close() so { timeout: 0 } reaches the documented force-close branch. Four test files add coverage across SQLite, Postgres, MySQL, and mock wire servers.

Security risks

None identified. No parsing of untrusted input, no auth/TLS/crypto surface, no new external I/O beyond localhost mock servers in tests.

Level of scrutiny

Moderate-to-high. The shared.ts change is a clear falsy-zero fix, but the query.ts change alters execution ordering for every Bun.SQL query awaited via .then()/.catch()/.finally() across all three adapters. The removed await Promise.$resolve() was a deliberate deferral; the PR argues convincingly that the executed status flag makes synchronous dispatch safe, and I traced the bindQuery → query.finally() → #run() re-entry to confirm it short-circuits, but this is exactly the kind of microtask-ordering change where an unforeseen caller could be relying on the old timing.

Other factors

• My earlier duplication nit was addressed (062e3cf).
• There is a fresh unresolved comment-cop inline on query.ts:132; it looks like a false positive on a two-line explanatory comment, but the author hasn't responded to it yet.
• Test coverage is thorough (fail-before verified, all three drivers, mock-server force-close and drain cases), which raises confidence — but does not make this a mechanical change.

[robobun]

This PR now conflicts with main in src/js/internal/sql/shared.ts. #32089 (2f5c180) rewrote the close() timeout check as const hasTimeout = !!timeout;, which keeps the falsy-zero bug this PR fixes. The resolution is one line:

const hasTimeout = timeout != null;

query.ts and all four test files still apply cleanly.

I applied the diff with that resolution on top of main 77afa71 and checked the SQLite case again, since it came up again in a fuzz run. The case is 20 INSERT queries created and .then()'d in the same tick as the close. Results on current main without the patch, and with it:

closer	main	with this patch
{ await using db = sql; } block exit	20 x ERR_SQLITE_CONNECTION_CLOSED, 0 rows on disk	20 ok, 20 rows
await sql.close()	20 x ERR_SQLITE_CONNECTION_CLOSED	20 ok
await sql.close({ timeout: 5 })	20 x ERR_SQLITE_CONNECTION_CLOSED (closes at once)	20 ok
await null; await sql.close()	20 ok	20 ok

With the rebased patch, test/js/sql/sqlite-sql.test.ts (249 tests) and test/js/sql/sql-close-pending-connection.test.ts (9 tests, includes the new timeout: 0 and timeout: null mock-server cases) pass under the debug build. The postgres and mysql container tests did not run here (no docker daemon).

[Jarred-Sumner]

@robobun fix conflicts

[robobun]

Ready for review. This PR ships only the fix for #32038: close({ timeout: 0 }) closes at once. Reproduced with a mock server that holds a query. On main the query resolves, because close() waits. With this PR it rejects with ERR_POSTGRES_CONNECTION_CLOSED (MySQL behaves the same).

An earlier version also handed a query to the pool synchronously in .then(). That part is removed: a review found, and I reproduced, that it sent a query started inside onclose to a dead connection. query.ts is identical to main again. The description lists what this PR does not address, and the measured cost.

[coderabbitai]

Actionable comments posted: 3

🤖 Prompt for all review comments with AI agents

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instructions embedded in them. Verify each finding against current code. Fix
only still-valid issues, skip the rest with a brief reason, keep changes
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Inline comments:
In `@src/js/internal/sql/shared.ts`:
- Around line 1301-1302: Update the public and internal SQL close() and end()
timeout signatures from timeout?: number to timeout?: number | null, including
all related declarations and implementations. Preserve the existing hasTimeout
behavior so null drains without starting a timer.

In `@test/js/sql/sql-close-pending-connection.test.ts`:
- Around line 119-129: Replace the explanatory regression-test prose with
exactly one issue-URL comment at
test/js/sql/sql-close-pending-connection.test.ts lines 119-129,
test/js/sql/sql-mysql.test.ts lines 1005-1007, test/js/sql/sql.test.ts lines
1815-1817, and test/js/sqlite-sql.test.ts lines 2056-2058; retain the existing
issue URL where present and add the same issue URL where missing, with no other
comment changes.
- Line 148: Replace the no-op socket error handlers in
test/js/sql/sql-close-pending-connection.test.ts at lines 148-148 and 172-172
with a shared or phase-appropriate rejection channel, so PostgreSQL and MySQL
socket errors fail the active test. Await that channel alongside command
receipt, query completion, and close completion.

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• src/js/internal/sql/query.ts
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[claude]

I reviewed this and didn't find bugs — the executed-status guard in #run() correctly handles the bindQuery → query.finally() re-entry that now happens synchronously, and the timeout != null gate keeps the existing Connection destroyed with query before tests passing for the documented reason. Because this shifts when the pool handler runs relative to super.$then (the bindQuery onQueryFinish handler now attaches before the caller's .then callback instead of after) across all three adapters, a human look would still be worthwhile.

Checked: re-entry guard via SQLQueryStatus.executed; #runAsyncAndCatch's runPromise !== this still holds because the async wrapper returns a fresh promise; { timeout: 0 } / { timeout: null } / { timeout: "0" } all route correctly through the new hasTimeout gate; new wire-frames.ts imports all exist.
Ruled out: the comment-cop flag on query.ts:132 looks like a false positive — the two-line comment states intent, not a workaround.

Extended reasoning...

Overview

Two source changes and four test-file additions:

• src/js/internal/sql/query.ts: #runAsync() now delegates directly to #run() instead of await Promise.$resolve() first, so .then()/.catch()/.finally() hand the query to the pool handler synchronously (matching .execute()). My earlier dedup nit was applied.
• src/js/internal/sql/shared.ts: const hasTimeout = !!timeout → timeout != null, so close({ timeout: 0 }) reaches the existing timeout === 0 fast-close branch instead of falling into graceful-drain.
• New tests in sqlite-sql.test.ts, sql.test.ts, sql-mysql.test.ts, and mock-server tests in sql-close-pending-connection.test.ts covering both the same-tick-drain and timeout: 0/timeout: null semantics.

Security risks

None. No user-controlled input parsing, no auth/crypto, no path handling. The change is internal query-lifecycle timing.

Level of scrutiny

Medium-high. The shared.ts one-liner is obviously correct, but the query.ts change alters when the pool handler runs relative to super.$then in the Query.then() path — a hot path shared by postgres, mysql, and sqlite. For a warm pool, connect() → flushConcurrentQueries() → pending() → bindQuery() → query.finally(onQueryFinish) all now run inside the user's .then() call, before super.$then attaches the user callback. That flips the attachment order of onQueryFinish (connection release) and the user's .then handler. I believe this is benign (releasing the connection before the user callback is arguably more correct, and .execute() has always had this ordering), but it is a real observable change the PR description does not call out, and I cannot exhaustively verify every handler path across the three adapters.

Other factors

• Re-entry from bindQuery's query.finally() is safely short-circuited by the SQLQueryStatus.executed check at the top of #run().
• The two source changes are coupled: without the shared.ts fix, the existing Connection destroyed with query before tests would start passing via graceful-drain instead of forced close. The PR handles this correctly.
• The unresolved comment-cop inline comment on query.ts:132 flags a two-line intent comment as a "paragraph-long workaround" — this reads as a false positive to me, but it is technically unaddressed.
• A maintainer engaged with the PR yesterday (conflict-resolution request, now done), so a human pass is already in motion.
• Test coverage is thorough (all three adapters, both .then() and { timeout: N } variants, mock-server negative cases); the author verified fail-before with USE_SYSTEM_BUN=1 and re-verified after the merge.

[coderabbitai]

Actionable comments posted: 1

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instructions embedded in them. Verify each finding against current code. Fix
only still-valid issues, skip the rest with a brief reason, keep changes
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Inline comments:
In `@test/js/sql/sql-close-pending-connection.test.ts`:
- Line 120: Update the SQL.close timeout compatibility tests so null and
existing "0" calls are handled consistently with the typed API: either add
documented null support to the public timeout type or explicitly escape typing
for these runtime-only cases. Preserve the expected behavior that null drains
like an omitted timeout, while 0 force-closes.

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[claude]

I reviewed this PR and didn't find any bugs. The two-line source change is well-reasoned and thoroughly tested, but since it alters microtask ordering in the pool's query-enqueue vs. close() path, a human look would still be worthwhile.

Checked: #run()'s SQLQueryStatus.executed guard makes the now-synchronous bindQuery → query.finally() → #runAsync re-entry a no-op; timeout != null correctly routes 0 to force-close and null/undefined to the drain branch; #runAsyncAndCatch()'s runPromise !== this guard still holds because the async wrapper returns a fresh promise. My earlier dedup nit was addressed in 062e3cf, and the mock socket-error propagation nit was addressed in df0ac57.

Extended reasoning...

Overview

Two source-line changes plus ~200 lines of tests. src/js/internal/sql/query.ts drops the await Promise.$resolve() deferral from #runAsync() so .then()/.catch()/.finally() enqueue the query into the pool synchronously, matching .execute(). src/js/internal/sql/shared.ts changes const hasTimeout = !!timeout to timeout != null so close({ timeout: 0 }) reaches the documented force-close branch. New tests cover SQLite, Postgres (container), MySQL (container), and mock-server postgres/mysql for the timeout: 0 / timeout: null edges.

Security risks

None identified. No auth, crypto, or untrusted-input parsing is touched; the mock-server test code builds outbound frames from the existing wire-frames.ts helpers.

Level of scrutiny

Medium. The diff is tiny, but it changes when the pool handler runs relative to a same-tick close() — a concurrency-sensitive lifecycle path where a regression means queries silently dropped or a hung close(). The author's mechanism analysis is convincing (.execute() already ran the handler synchronously; the executed-status flag guards re-entry from bindQuery's finally()), and fail-before was verified with USE_SYSTEM_BUN=1 and by stashing src/. Still, ordering changes in pool shutdown warrant a maintainer's eyes.

Other factors

My earlier inline nit (dedup #runAsync/#run) was addressed. CodeRabbit's socket-error-propagation comment was addressed in df0ac57. Two CodeRabbit nits remain open — widening the timeout?: number type to number | null, and swapping test prose for issue-URL comments — both cosmetic and non-blocking. Jarred engaged to request the conflict resolution but has not yet reviewed the substance.

[claude]

LGTM — the synchronous enqueue path already exists via .execute(), so this makes .then()/.catch()/.finally() take the same route instead of a novel one.

What was reviewed:

• Traced .then() → #run() → queryFromPoolHandler → pool.connect → bindQuery → query.finally() re-entry; the SQLQueryStatus.executed guard short-circuits it.
• Checked that onQueryFinish now registering before the user's .then callback only reorders pool release vs. row delivery on the same settled promise — not user-observable.
• hasTimeout = timeout != null reaches the existing timeout === 0 fast-close branch; null/undefined still drain (pinned by the new mock-server tests).
• The prior dedup nit was applied; all CodeRabbit threads are resolved with reasonable dispositions.

Extended reasoning...

Overview

Two source changes plus tests across four files:

• src/js/internal/sql/query.ts: #runAsync() now delegates directly to #run() instead of duplicating its body with an await Promise.$resolve() in the middle. Net effect: .then()/.catch()/.finally() hand the query to the pool handler synchronously, exactly as .execute() already does.
• src/js/internal/sql/shared.ts: const hasTimeout = timeout != null (was !!timeout). { timeout: 0 } now reaches the documented force-close branch instead of accidentally falling through to graceful drain.
• New tests in sql.test.ts, sql-mysql.test.ts, sqlite-sql.test.ts (same-tick drain across all three adapters) and sql-close-pending-connection.test.ts (mock-server timeout: 0 force-close and timeout: null drain for postgres and mysql).

Security risks

None. This is JS-side pool/query lifecycle bookkeeping — no auth, crypto, parsing of untrusted input, or native memory management is touched.

Level of scrutiny

Medium. The change alters when the pool handler runs relative to the caller's .then() return (synchronously instead of one microtask later), which is the kind of ordering change where re-entrancy bugs hide. I traced the new synchronous path: then() → #runAsyncAndCatch → #run → handler → pool.connect → (if a connection is ready) flushConcurrentQueries → onQueryConnected → bindQuery → query.finally(onQueryFinish). That inner .finally() re-enters #runAsyncAndCatch → #run, which the SQLQueryStatus.executed mask (set before handler runs) short-circuits. This is the same path .execute() has always taken, so it is not new territory for the pool code. The one observable ordering difference — bindQuery's finally handler now attaches before the user's .then callback — only affects which microtask releases the connection vs. delivers rows; both read the same settled result.

Other factors

• Fail-before evidence is in the PR body for both debug+ASAN and release (timeout: 0 mocks time out on main; the same-tick SQLite test rejects with ERR_SQLITE_CONNECTION_CLOSED), and the author separately verified against USE_SYSTEM_BUN=1 and with src/ stashed.
• My earlier dedup nit (07-08) was applied in 062e3cf / carried through the rebase.
• All CodeRabbit threads are resolved: the socket-error propagation ask was addressed in df0ac57 (failUntilCommand wires error/close into the awaited commandReceived promise); the type-widening and @ts-expect-error asks were declined with a stated rationale (the null case is a runtime-compat pin, matching the existing "0" calls in the same file).
• Jarred's only interaction was "fix conflicts", which was done and re-verified.
• The mock tests await real observable conditions (commandReceived resolves when the wire command arrives) rather than sleeps, and clean up via try/finally { server.close() }.

[claude]

Additional findings (outside the current diff — GitHub can't attach inline comments there):

• 🟣 src/js/internal/sql/shared.ts — pre-existing: users who write await Promise.all([sql..., sql.end()]) or await q in the same tick still get ERR_CONNECTION_CLOSED after merge; only an explicit .then() call is drained. await and Promise.all adopt a Query through a thenable job, so Query.then() (query.ts:134) runs one microtask after close() has set closed = true at shared.ts:1351 and sampled hasPendingQueries() at shared.ts:1355. Fix: close() must also see queries whose then() lands in that job, e.g. keep accepting hand-offs for one microtask before setting closed and sampling pending work, or track created-but-unstarted queries, so every await form drains, not only .then(r => r). [also at: src/js/internal/sql/query.ts:134 - pre-existing, partial fix: users who await a query with await q or Promise.all([q, ...]) in the same tick as sql.end() still get ERR_CONNECTION_CLOSED after merging, exactly as on the base branch.]

  Why this was flagged

  A user runs const q = sqlselect 1; await Promise.all([q, sql.end()]) (or (async () => await q)() followed by sql.end()) on a warm pool, via sql.close at src/js/bun/sql.ts:1075. Per the Promise spec, Promise.resolve(q) / await q see q.constructor === Query, not Promise, so they enqueue a NewPromiseResolveThenableJob and call q.then one microtask later; the PR's synchronous hand-off in Query.then() (src/js/internal/sql/query.ts:134) therefore has not run when sql.end() executes. close() at src/js/internal/sql/shared.ts:1351 sets closed = true synchronously and at shared.ts:1355/1376 samples hasPendingQueries(), which is false, so it awaits #close(). The job then calls q.then → #run → queryFromPoolHandler → pool.connect (shared.ts:1399), which returns connectionClosedError(), and the query rejects with ERR_POSTGRES_CONNECTION_CLOSED / ERR_MYSQL_CONNECTION_CLOSED / ERR_SQLITE_CONNECTION_CLOSED. The base branch fails the same way, so this is the…

  Verification: pre-existing (base fails by the same route; the PR's fix takes effect only on explicit .then()/.catch()/.finally() calls and does not reach await q / Promise.all([q, ...])). Trigger: warm pool, then await Promise.all([sql..., sql.end()]) or const q = sql...; sql.end(); await q with no explicit .then() on the Query. Mechanism verified: the only place a Query is handed to the pool…

• 🟣 src/js/internal/sql/query.ts — A caller that calls q.cancel() on a query and then awaits it hangs forever; the promise never settles. #run() at query.ts:104-108 returns early when the cancelled bit is set without calling reject(), and cancel() at query.ts:196 only reaches handle.cancel() if the query was already executed, so nothing ever settles the PublicPromise. Every then()/catch()/finally()/run() now goes through this single guard (query.ts:134). Fix: when #run() bails on SQLQueryStatus.cancelled (and on error/invalidHandle for a never-executed query) it must settle the promise, e.g. reject with adapter.queryCancelledError(), so awaiting a cancelled-before-execute query resolves like a cancelled in-flight one does (sql.ts:113).

  Why this was flagged

  Trigger: const q = sqlselect ...; q.cancel(); await q or any code path that cancels a query before it is first awaited (for example a request handler that builds queries and cancels on client abort before awaiting). Entry: Query.then() at query.ts:263 -> #runAsyncAndCatch (query.ts:248) -> #runAsync (query.ts:131) -> #run(). At query.ts:104-108 the status has SQLQueryStatus.cancelled set (query.ts:194), so #run returns undefined without touching this[_reject]. cancel() itself at query.ts:196-202 only calls handle.cancel() when the executed bit is set, which it is not. No other path settles the promise: the pool never sees the query, and close() at shared.ts:1286 only rejects entries in waitingQueue/reservedQueue. The caller therefore awaits forever and a graceful close() completes without ever rejecting it. The dismissal noted the base's #runAsync had the same guard, which is true, but the diff now funnels then/catch/finally/run/execute through this one guard and the PR's own contract is that same-tick queries settle; an in-flight cancel does settle via sql.ts:111-113…

  Verification: pre-existing — the mechanism is real but the base branch already fails by the identical route, so this PR neither introduces nor widens it. Trigger: q.cancel() on a Query before it is first awaited/executed, then await q (or .then/.catch/.finally/.run()). Mechanism at HEAD (/home/claude/bun/src/js/internal/sql/query.ts): cancel() sets this[_queryStatus] |= SQLQueryStatus.cancelled…

[claude]

Nothing blocking. The comments below are optional suggestions. There is no need to push a fix for them before merging.

[claude]

LGTM — the a3ec6d0 push builds the postgres held-query mock on pgMockServer/pgHold, which addresses the mock-duplication nit from the last pass, and the one-line gate change itself is correct.

What was reviewed:

• BaseSQLAdapter.close() in src/js/internal/sql/shared.ts: timeout != null keeps the existing Number() coercion and NaN/negative/2^31 validation, so 0/false/"" force-close and undefined/null still drain without a timer; the timeout === 0 branch is now reachable.
• The 16-case spelling matrix in test/js/sql/sql-close-pending-connection.test.ts: both mocks bind 127.0.0.1:0, wire socket error/close to reject, release via await using plus server.close() in finally, and assert a combined { query, close } object with exact codes; the "invalid" cells confirm the pool stays open when validation throws before closed is set.
• Docs/types agree: packages/bun-types/sql.d.ts already documents timeout in seconds, matching the * 1000 at the setTimeout call.

Extended reasoning...

The diff is a single-line gate change in BaseSQLAdapter.close() (src/js/internal/sql/shared.ts:1343), one docs sentence in docs/runtime/sql.mdx, four existing tests switched from timeout: "0" to timeout: 0, and a new hermetic mock-server test matrix covering eight timeout spellings for both postgres and mysql. It touches no auth, crypto, or injection surface; the only user-facing behavior change is that NaN now rejects with ERR_INVALID_ARG_VALUE and false/"" force-close, both consistent with the existing validation code. The only change since the prior review is commit a3ec6d0, which addressed the outstanding mock-duplication nit; the three pre-existing notes from that review were explicitly non-blocking and remain out of scope. The bug hunt ran to a dry streak with no findings, no CODEOWNER covers the changed files, and no third-party review is in a CHANGES_REQUESTED state, so the change is small and self-contained enough to approve.

[robobun]

Checked the head a3ec6d0 merged onto main a4f1429. The merge is clean.

Setup: debug build, Linux x64, a mock PostgreSQL server in the same process, max: 1, connectionTimeout: 5, 3 runs for each cell. "main" is a release build of main at 367d939, which still has !!timeout.

state at close({ timeout: 0 })	main	this PR
pool still connecting (the server accepts and never answers)	resolves after 4.8 s, when connectionTimeout ends. The query rejects ERR_POSTGRES_CONNECTION_TIMEOUT	resolves 47 to 79 ms after the call. The query rejects ERR_POSTGRES_CONNECTION_CLOSED
query in flight (the server never answers it)	never resolves, killed at 20 s	resolves 49 to 104 ms after the call. The query rejects ERR_POSTGRES_CONNECTION_CLOSED. The process exits by itself
begin() callback not settled	close(), begin() and a queued query are all still pending after 3 s	resolves 68 to 79 ms after the call. begin() and the queued query reject ERR_POSTGRES_CONNECTION_CLOSED
reserve()d connection not released	close() and a queued query are still pending after 3 s	resolves 55 to 80 ms after the call. The queued query rejects ERR_POSTGRES_CONNECTION_CLOSED

close({ timeout: 1 }) behaves the same on both builds in the last two rows. It resolves after about 1.1 s.

Tests on the merged build:

• test/js/sql/sql-close-pending-connection.test.ts and test/js/sql/sql-onconnect-onclose-throw.test.ts: 33 pass, 0 fail. With the release build of main, 16 of the 24 tests in the first file fail.
• All of test/js/sql/: 932 pass, 48 fail, none from this diff. 46 are MySQL tests that need a real server. The local MariaDB rejects root (Access denied for user 'root'@'localhost'), and the same 46 fail on main here. The other 2 are the postgres-string-leak.test.ts cases. They go over the 5 s default on a debug build in the full run, and pass alone (6.2 s and 9.5 s).

The last two table rows have no test in this PR. They go through the same gate.

The red CI on this head (build 120207) is not from this diff. The only red test is test/js/bun/spawn/spawn.test.ts on the debian 13 x64-asan lane, in the two "an idle reader stopped at the highwater mark" cases. The child's stderr is not empty:

WARNING: ptrace appears to be blocked (is seccomp enabled?). LeakSanitizer may hang.
Child exited with signal 42.

The same test is red on that lane in 14 of 49 PR builds created between 03:00 and 10:00 UTC on Sep 24, on unrelated branches, and again in build 121395 on Sep 28. Builds of main do not run that lane. No SQL test failed in build 120207.

[Jarred-Sumner]

const hasTimeout = !!timeout made the timeout === 0 branch unreachable, so the documented "close immediately" waited like a plain close(), forever if the peer never answered. #45304 has the same one-line fix: timeout != null.

The gate now sits in closeTimeoutMs() (src/js/internal/sql/pool.ts), which sql.close(), reserved.close() and tx.close() share. The side effects are the ones listed here: NaN rejects with ERR_INVALID_ARG_VALUE and the pool stays open, false and "" force. NaN is now validated on the two handle paths as well.

"close({ timeout: 0 }) closes at once" in test/js/sql/sql-pool.test.ts holds a query with a lock on real PostgreSQL, MySQL and MariaDB servers, so a wrong wait fails an assertion instead of a timeout. test/js/sql/sql-close-pending-connection.test.ts used to pass the string "0" to get around the bug and now passes the number.

Most of "Not addressed here" is fixed in #45304 too: a query started in the tick of close() is drained (#44105), onclose runs after the connection has left the pool (#43958), q.cancel() before the first await q rejects instead of hanging, and a later close({ timeout: 0 }) forces a close that is already waiting (#43959). This fixes #32038.