unreleased ---------- v1.12.3 (2026-04-03) -------------------- - Send datestyle startup parameter, improving compatbility with database engines that use a different default datestyle such as EnterpriseDB ([#1312]). [#1312]: https://github.com/lib/pq/pull/1312 v1.12.2 (2026-04-02) -------------------- - Treat io.ErrUnexpectedEOF as driver.ErrBadConn so database/sql discards the connection. Since v1.12.0 this could result in permanently broken connections, especially with CockroachDB which frequently sends partial messages ([#1299]). [#1299]: https://github.com/lib/pq/pull/1299 v1.12.1 (2026-03-30) -------------------- - Look for pgpass file in ~/.pgpass instead of ~/.postgresql/pgpass ([#1300]). - Don't clear password if directly set on pq.Config ([#1302]). [#1300]: https://github.com/lib/pq/pull/1300 [#1302]: https://github.com/lib/pq/pull/1302 v1.12.0 (2026-03-18) -------------------- - The next release may change the default sslmode from `require` to `prefer`. See [#1271] for details. - `CopyIn()` and `CopyInToSchema()` have been marked as deprecated. These are simple query builders and not needed for `COPY [..] FROM STDIN` support (which is *not* deprecated). ([#1279]) // Old tx.Prepare(CopyIn("temp", "num", "text", "blob", "nothing")) // Replacement tx.Prepare(`copy temp (num, text, blob, nothing) from stdin`) ### Features - Support protocol 3.2, and the `min_protocol_version` and `max_protocol_version` DSN parameters ([#1258]). - Support `sslmode=prefer` and `sslmode=allow` ([#1270]). - Support `ssl_min_protocol_version` and `ssl_max_protocol_version` ([#1277]). - Support connection service file to load connection details ([#1285]). - Support `sslrootcert=system` and use `~/.postgresql/root.crt` as the default value of sslrootcert ([#1280], [#1281]). - Add a new `pqerror` package with PostgreSQL error codes ([#1275]). For example, to test if an error is a UNIQUE constraint violation: if pqErr, ok := errors.AsType[*pq.Error](err); ok && pqErr.Code == pqerror.UniqueViolation { log.Fatalf("email %q already exsts", email) } To make this a bit more convenient, it also adds a `pq.As()` function: pqErr := pq.As(err, pqerror.UniqueViolation) if pqErr != nil { log.Fatalf("email %q already exsts", email) } ### Fixes - Fix SSL key permission check to allow modes stricter than 0600/0640#1265 ([#1265]). - Fix Hstore to work with binary parameters ([#1278]). - Clearer error when starting a new query while pq is still processing another query ([#1272]). - Send intermediate CAs with client certificates, so they can be signed by an intermediate CA ([#1267]). - Use `time.UTC` for UTC aliases such as `Etc/UTC` ([#1282]). [#1258]: https://github.com/lib/pq/pull/1258 [#1265]: https://github.com/lib/pq/pull/1265 [#1267]: https://github.com/lib/pq/pull/1267 [#1270]: https://github.com/lib/pq/pull/1270 [#1271]: https://github.com/lib/pq/pull/1271 [#1272]: https://github.com/lib/pq/pull/1272 [#1275]: https://github.com/lib/pq/pull/1275 [#1277]: https://github.com/lib/pq/pull/1277 [#1278]: https://github.com/lib/pq/pull/1278 [#1279]: https://github.com/lib/pq/pull/1279 [#1280]: https://github.com/lib/pq/pull/1280 [#1281]: https://github.com/lib/pq/pull/1281 [#1282]: https://github.com/lib/pq/pull/1282 [#1283]: https://github.com/lib/pq/pull/1283 [#1285]: https://github.com/lib/pq/pull/1285 v1.11.2 (2026-02-10) -------------------- This fixes two regressions: - Don't send startup parameters if there is no value, improving compatibility with Supavisor ([#1260]). - Don't send `dbname` as a startup parameter if `database=[..]` is used in the connection string. It's recommended to use dbname=, as database= is not a libpq option, and only worked by accident previously. ([#1261]) [#1260]: https://github.com/lib/pq/pull/1260 [#1261]: https://github.com/lib/pq/pull/1261 v1.11.1 (2026-01-29) -------------------- This fixes two regressions present in the v1.11.0 release: - Fix build on 32bit systems, Windows, and Plan 9 ([#1253]). - Named []byte types and pointers to []byte (e.g. `*[]byte`, `json.RawMessage`) would be treated as an array instead of bytea ([#1252]). [#1252]: https://github.com/lib/pq/pull/1252 [#1253]: https://github.com/lib/pq/pull/1253 v1.11.0 (2026-01-28) -------------------- This version of pq requires Go 1.21 or newer. pq now supports only maintained PostgreSQL releases, which is PostgreSQL 14 and newer. Previously PostgreSQL 8.4 and newer were supported. ### Features - The `pq.Error.Error()` text includes the position of the error (if reported by PostgreSQL) and SQLSTATE code ([#1219], [#1224]): pq: column "columndoesntexist" does not exist at column 8 (42703) pq: syntax error at or near ")" at position 2:71 (42601) - The `pq.Error.ErrorWithDetail()` method prints a more detailed multiline message, with the Detail, Hint, and error position (if any) ([#1219]): ERROR: syntax error at or near ")" (42601) CONTEXT: line 12, column 1: 10 | name varchar, 11 | version varchar, 12 | ); ^ - Add `Config`, `NewConfig()`, and `NewConnectorConfig()` to supply connection details in a more structured way ([#1240]). - Support `hostaddr` and `$PGHOSTADDR` ([#1243]). - Support multiple values in `host`, `port`, and `hostaddr`, which are each tried in order, or randomly if `load_balance_hosts=random` is set ([#1246]). - Support `target_session_attrs` connection parameter ([#1246]). - Support [`sslnegotiation`] to use SSL without negotiation ([#1180]). - Allow using a custom `tls.Config`, for example for encrypted keys ([#1228]). - Add `PQGO_DEBUG=1` print the communication with PostgreSQL to stderr, to aid in debugging, testing, and bug reports ([#1223]). - Add support for NamedValueChecker interface ([#1125], [#1238]). ### Fixes - Match HOME directory lookup logic with libpq: prefer $HOME over /etc/passwd, ignore ENOTDIR errors, and use APPDATA on Windows ([#1214]). - Fix `sslmode=verify-ca` verifying the hostname anyway when connecting to a DNS name (rather than IP) ([#1226]). - Correctly detect pre-protocol errors such as the server not being able to fork or running out of memory ([#1248]). - Fix build with wasm ([#1184]), appengine ([#745]), and Plan 9 ([#1133]). - Deprecate and type alias `pq.NullTime` to `sql.NullTime` ([#1211]). - Enforce integer limits of the Postgres wire protocol ([#1161]). - Accept the `passfile` connection parameter to override `PGPASSFILE` ([#1129]). - Fix connecting to socket on Windows systems ([#1179]). - Don't perform a permission check on the .pgpass file on Windows ([#595]). - Warn about incorrect .pgpass permissions ([#595]). - Don't set extra_float_digits ([#1212]). - Decode bpchar into a string ([#949]). - Fix panic in Ping() by not requiring CommandComplete or EmptyQueryResponse in simpleQuery() ([#1234]) - Recognize bit/varbit ([#743]) and float types ([#1166]) in ColumnTypeScanType(). - Accept `PGGSSLIB` and `PGKRBSRVNAME` environment variables ([#1143]). - Handle ErrorResponse in readReadyForQuery and return proper error ([#1136]). - Detect COPY even if the query starts with whitespace or comments ([#1198]). - CopyIn() and CopyInSchema() now work if the list of columns is empty, in which case it will copy all columns ([#1239]). - Treat nil []byte in query parameters as nil/NULL rather than `""` ([#838]). - Accept multiple authentication methods before checking AuthOk, which improves compatibility with PgPool-II ([#1188]). [`sslnegotiation`]: https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-CONNECT-SSLNEGOTIATION [#595]: https://github.com/lib/pq/pull/595 [#745]: https://github.com/lib/pq/pull/745 [#743]: https://github.com/lib/pq/pull/743 [#838]: https://github.com/lib/pq/pull/838 [#949]: https://github.com/lib/pq/pull/949 [#1125]: https://github.com/lib/pq/pull/1125 [#1129]: https://github.com/lib/pq/pull/1129 [#1133]: https://github.com/lib/pq/pull/1133 [#1136]: https://github.com/lib/pq/pull/1136 [#1143]: https://github.com/lib/pq/pull/1143 [#1161]: https://github.com/lib/pq/pull/1161 [#1166]: https://github.com/lib/pq/pull/1166 [#1179]: https://github.com/lib/pq/pull/1179 [#1180]: https://github.com/lib/pq/pull/1180 [#1184]: https://github.com/lib/pq/pull/1184 [#1188]: https://github.com/lib/pq/pull/1188 [#1198]: https://github.com/lib/pq/pull/1198 [#1211]: https://github.com/lib/pq/pull/1211 [#1212]: https://github.com/lib/pq/pull/1212 [#1214]: https://github.com/lib/pq/pull/1214 [#1219]: https://github.com/lib/pq/pull/1219 [#1223]: https://github.com/lib/pq/pull/1223 [#1224]: https://github.com/lib/pq/pull/1224 [#1226]: https://github.com/lib/pq/pull/1226 [#1228]: https://github.com/lib/pq/pull/1228 [#1234]: https://github.com/lib/pq/pull/1234 [#1238]: https://github.com/lib/pq/pull/1238 [#1239]: https://github.com/lib/pq/pull/1239 [#1240]: https://github.com/lib/pq/pull/1240 [#1243]: https://github.com/lib/pq/pull/1243 [#1246]: https://github.com/lib/pq/pull/1246 [#1248]: https://github.com/lib/pq/pull/1248 v1.10.9 (2023-04-26) -------------------- - Fixes backwards incompat bug with 1.13. - Fixes pgpass issue