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The binary bool arm of write_bind encoded ToBoolean(value), so an object, array, Date, Temporal value or function bound to a parameter the server types as boolean was stored as true. It now throws ERR_INVALID_ARG_TYPE, the same way the bytea arm does, and only a JS boolean is encoded. A string is still sent as text for the server to parse.
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Status Reproduced on Bun 1.4.2 against PostgreSQL 17 with: import { SQL } from "bun";
const sql = new SQL({ url: process.env.PGURL, max: 1 });
await sql`create temp table w (b bool)`;
for (const v of [{ enabled: false }, [], [1, 2], new Date(NaN), new Date(), () => 1, Temporal.PlainDate.from("2024-05-06")]) {
const [row] = await sql.unsafe("insert into w (b) values ($1) returning b::text as stored", [v]);
console.log(row.stored); // "true" for every value
}Every value is stored as Test: |
WalkthroughChangesPostgreSQL boolean bind validation
Suggested reviewers: Merge Risk: 🟡 Moderate · up to Invalid boolean parameters are rejected correctly, but the rejection can corrupt the connection's pending protocol state and cause the next query on that connection to fail. Connection cleanup and same-connection coverage are needed before merge. 🚥 Pre-merge checks | ✅ 4✅ Passed checks (4 passed)
✨ Finishing Touches 💡 1🛠️ Fix failing CI checks 💡
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In `@src/sql_jsc/postgres/PostgresRequest.rs`:
- Line 202: Before returning the TypeError from the write_bind validation path,
clear the partially buffered Bind request or retire the connection so no invalid
framing or format codes remain pending. Add a regression test that triggers the
invalid boolean bind, reuses the same connection for a subsequent query, and
verifies the query succeeds.
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src/sql_jsc/postgres/PostgresRequest.rstest/js/sql/postgres-bool-bind.test.ts
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LGTM — a focused per-arm fix that mirrors the already-merged bytea contract, with the shared error path extracted cleanly.
What was reviewed:
- The
boolarm:is_boolean()gatesas_boolean(), strings still fall through to text via theeffective_tagoverride at line 184, and null/undefined are handled before the switch — the "a boolean or a string" message is accurate. invalid_bind_value(): thebytearefactor preserves the identical message, anddetermine_specific_typefailure is propagated rather than unwrapped.- Tests:
test.eachover the rejected matrix asserts class + code + exact message (fails on 1.4.2 where rows come back), the accepted-values test covers booleans/null/undefined/all string spellings plus post-22P02 connection reuse, and the per-case connection is justified against #34732. File placement matches the siblingpostgres-bytea-bind.test.ts.
Extended reasoning...
Overview
The PR tightens one arm of the Postgres binary Bind encoder in src/sql_jsc/postgres/PostgresRequest.rs: the types::Tag::bool arm previously wrote value.to_boolean() as u8 (JS truthiness), so any object/array/Date/function bound to a server-inferred boolean parameter was silently stored as true. It now requires value.is_boolean() and throws ERR_INVALID_ARG_TYPE otherwise. A new helper invalid_bind_value() builds the error and is also adopted by the adjacent bytea arm, which already had this contract inline from #41889 — the refactor is byte-for-byte message-equivalent. A new test file exercises the rejected matrix (objects, arrays, Dates, functions, typed arrays, Temporal), the accepted matrix (booleans, null/undefined, every Postgres string spelling), the cast and comparison contexts, and post-error connection reuse.
Security risks
None. This is input validation on the client side that turns silent data corruption into a catchable TypeError. No parsing of untrusted network bytes changes; the write path is strictly narrower than before. The error is routed through the centralized ERR_INVALID_ARG_TYPE machinery, and determine_specific_type errors are propagated rather than unwrapped.
Level of scrutiny
Low-to-moderate. The Rust change is ~30 lines, follows the exact shape already merged for the sibling bytea arm, and touches no allocation, lifetime, or GC concerns. I verified the surrounding control flow: strings are diverted to the text path before the match (line 184), null/undefined write -1 before the match (line 169), and numbers declare int4 in Signature::generate so they never reach this arm — all consistent with the PR's behavior table. The is_boolean() → as_boolean() pairing satisfies REVIEW.md's "never call non-throwing accessors on user values without validating type first". The extracted helper is used at both parallel sites, and the error message names the parameter position, the type, the accepted forms, and echoes the received value.
Other factors
This is a user-facing behavior change (previously-accepted values now throw), but the old behavior was unambiguous data corruption — { enabled: false } stored as true — and the precedent for a client-side TypeError over a text-fallback 22P02 was already set by #41889 in the same function. The tests assert the strongest invariant (class + code + full message), use test.each, describeWithContainer, and await using, and would fail on the unfixed build (the insert returns rows instead of an error, failing toBeInstanceOf(TypeError)). The new-file placement matches the established test/js/sql/postgres-*-bind.test.ts pattern rather than the "add to existing file" default. The bug hunt exited on dry_streak with no findings and no ruled-out candidates.
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Updated 6:46 AM PT - Sep 8th, 2026
✅ @robobun, your commit d52ddaa5e0845d387006e0137443048d5d731c1d passed in 🧪 To try this PR locally: bunx bun-pr 41970That installs a local version of the PR into your bun-41970 --bun |
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Heads-up: #41976 now carries the consolidated Both stop the silent |
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Problem
boolean(a bool column,$1::bool,where flag = $1) is stored astrue:{ enabled: false },[], aDate, a function. The query succeeds.boolarm ofwrite_bind(src/sql_jsc/postgres/PostgresRequest.rs:200) writesvalue.to_boolean(), JS truthiness. Bun declares OID 0 for these values, the server answersbooleanfrom the context, and Bind takes that arm.Fix
ERR_INVALID_ARG_TYPE:Query parameter $2 of type boolean must be a boolean or a string. Received an instance of Date. A string is still sent as text for the server to parse ('t','off','1').nullis still NULL.byteaarm next to it. One helper,invalid_bind_value, now builds the message for both arms.test/js/sql/postgres-bool-bind.test.ts(1.4.2 fails 9 of 10),postgres-bytea-bind.test.ts, andsql.test.tson a local PostgreSQL 17 (same failures as main, all environment). Self-reviewed: 3 concerns, 2 addressed, 1 declined (Notes).Background
Signature::generatedeclares a type only for numbers, booleans, bigints and byte buffers. Objects, arrays and Dates get OID 0, so the server's answer picks their Bind arm.boolis one byte, 0 or 1. The text form acceptst/f/true/false/yes/no/on/off/1/0and nothing else.Notes
Stored value for
insert into t (b bool) values ($1), default options, real PostgreSQL:{ enabled: false },{ a: 1 }trueERR_INVALID_ARG_TYPE ... Received an instance of Object[],[1, 2]true... Received an instance of Arraynew Date(NaN),new Date(0)true... Received an instance of Datefunction enabled() {}true... Received function enablednew Int32Array([1])true... Received an instance of Int32ArrayTemporal.PlainDate.from("2024-05-06")true... Received an instance of PlainDatetrue/falsenull/undefined"t","off","1","garbage""garbage"is 22P02)0/1int4, 42804 from the serverWhy a client-side error and not a text fallback. An earlier revision of this branch sent a non-boolean as
String(value)in text format and let the server answer 22P02, the node-postgres behavior. That avoids a throw insidewrite_bind, but it puts"[object Object]"on the wire, accepts[true](it stringifies to"true"), and gives two adjacent arms two failure contracts after #41889. The positionalTypeErroris the clearer report, so this revision matches #41889.After any encoder arm throws, the partial Bind message stays in the write buffer and the next query on that connection fails with
ERR_POSTGRES_CONNECTION_CLOSED. This is pre-existing for every bind-time error ({ a: 1n }bound tojsonb, thebyteaarm) and is what #34732 fixes. The test uses one connection per rejecting case so it does not depend on that.prepare: false: the Bind is written before ParameterDescription arrives, so these values take the OID 0 text path (String(value), 22P02 from the server) on the first and on later executions. Unchanged.Related work on the same function, not part of this PR: #41912 sends parameters that have no binary encoder (
numeric,real,time, arrays) as text and restructures the format-code loop. The two changes touch different hunks except theboolarm label, and either rebases over the other in a few lines. Thetimestampandint4arms have their own range checks in #34707 and #34708.Self-review. Raised: (1) the failure contract should match the merged
byteaarm, addressed by this revision. (2) The first revision's helper left the other arms' coercions in place behind a default, addressed by dropping the helper and keeping the PR to theboolarm, the shape #41889 landed in. (3) Fold this into #41912 instead of a separate PR: declined. #41912 is a larger restructure with a different purpose (format codes for types without an encoder), it does not change theboolarm, and a per-arm fix of this size rebases over it trivially.Suites run with the debug build:
postgres-bool-bind,postgres-bytea-bind,sql-prepare-false,sql-postgres-datetime-roundtrip,postgres-binary-numeric,postgres-datestyle,postgres-prepared-pipeline-reorder,postgres-simple-query-pipeline,sql-reserve-abort,sql-onconnect-onclose-throw,postgres-multi-statement-fields,postgres-listen-notify(106 pass), andsql.test.tswith the docker gate forced open locally (832 pass, 20 fail: md5/scram roles missing, SQL_ASCII encoding,max_prepared_transactions = 0, debug-build timeouts, and the timing-basedreserve connection, all of which fail the same way without this change).[human-review] gate passed · iteration 0 · 2 files touched
fails on main (without fix)
passes on PR (with fix)
diff hotspot
gate history · 1 passed · 0 rejected · iteration 0
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