Sourced from modernc.org/sqlite's changelog.

Changelog

• 2026-08-19 v1.57.0:

  • Add an opt-in _defensive DSN query parameter that turns on SQLite's defensive mode for the connection, disabling the SQL-level features that let ordinary statements deliberately corrupt the database file. When _defensive=1 (or any strconv.ParseBool true value) is supplied, the driver calls sqlite3_db_config with SQLITE_DBCONFIG_DEFENSIVE immediately after sqlite3_open_v2 and before every other parameter is applied, so the PRAGMAs the driver itself runs, the _pragma list, and every statement the caller prepares are all subject to it. On such a connection PRAGMA writable_schema=ON, PRAGMA journal_mode=OFF and PRAGMA schema_version=N become silent no-ops, and writes to a virtual table's shadow tables (fts5's _data, _idx and so on) and to sqlite_dbpage fail with "table ... may not be modified"; reading those tables, ordinary use of the virtual tables that own them, and VACUUM are unaffected. The flag has no PRAGMA equivalent, so sqlite3_db_config — and therefore a DSN parameter — is the only way to reach it short of dropping to modernc.org/sqlite/lib. The value is parsed before sqlite3_open_v2, so an invalid one fails the connection without creating the database file, and the parameter must appear at most once: a repeated _defensive is an error rather than letting the first value silently win. Absence of the parameter, or _defensive=0, leaves SQLite's default behavior unchanged; existing DSNs continue to work byte-for-byte. Two limits are worth stating plainly, since the name invites more confidence than the flag earns. Defensive mode is a hardening measure, not a sandbox for hostile database files: it is one of several steps SQLite recommends for that purpose, and this build compiles with neither SQLITE_TRUSTED_SCHEMA=0 nor SQLITE_DQS=0 and exposes no authorizer. And it is a property of the connection, not of the database file — a second handle opened on the same file without the parameter is unrestricted.
  • Reject the one DSN combination defensive mode would otherwise swallow in silence. _defensive=1 together with _journal_mode=OFF (or _journal=OFF) now fails the connection instead of opening one in which neither parameter was honoured: SQLite turns PRAGMA journal_mode=OFF into a no-op that still reports success, so the driver would have accepted the mode, executed it, and left the journal untouched without telling anyone. The check runs in the validation phase introduced in v1.55.0, before any statement executes, so a rejected DSN cannot leave the database half-configured. _pragma remains the exception it has always been: _pragma=journal_mode(OFF) alongside _defensive=1 still runs and is still silently ignored by SQLite. Only DSNs using _defensive can be affected, and that parameter is new, so no DSN that opened before changes behavior.
  • See [GitHub pull request #6](modernc-org/sqlite#6), thanks wsman!
  • Ship the sqlite-vec license notice this module has been missing. modernc.org/sqlite/vec has bundled the transpiled sqlite-vec sources since v1.47.0, but the module carried only its own BSD-3-Clause LICENSE and the public-domain SQLite notice. sqlite-vec is Copyright (c) 2024 Alex Garcia, dual-licensed Apache-2.0 OR MIT and used here under MIT, whose terms require the copyright and permission notice to accompany substantial portions of the software — which 2.8 MB of transpiled vec/ plainly is. The notice now ships as LICENSE-SQLITE_VEC in the module root, byte-identical to the LICENSE-MIT in the upstream v0.1.9 archive and named after the file modernc.org/libsqlite_vec extracts it into. Attribution was never absent — vec's package documentation has named the extension, pinned the version and linked upstream — but the license text itself was, and the omission was ours: vendor_libs/main.go copied the per-target transpiles and nothing else. It now copies the notice alongside them and fails the vendoring run if it cannot, so a make vendor can no longer quietly drop it. The vec package documentation gained a License section recording that the package is under a different license from the rest of this module.
  • The SQLite notice is renamed from SQLITE-LICENSE to LICENSE-SQLITE; update any direct links to it. Its contents are unchanged and SQLite remains public domain. The name now matches both the new LICENSE-SQLITE_VEC beside it and the LICENSE-<upstream> convention every other modernc.org repository follows, but it is more than cosmetic: go mod vendor selects the files it copies into a downstream vendor/ tree by matching each name against a fixed list of prefixes — LICENSE among them — so a name merely ending in LICENSE was never propagated. Both bundled notices now travel with the code into vendored builds, which is where the MIT terms on vec/ keep applying. No code changes; no behavior changes.
  • Let a caller-constructed Driver register its own functions, collations and virtual table modules. Driver has always held four categories of registration state, but only RegisterConnectionHook could put anything on a constructed one: functions and collations were reachable through the package-level API alone, and modules through the package-level driver only, which left the modules field written and read through that instance and so process-global state wearing a per-instance field. Driver now has RegisterFunction, RegisterScalarFunction, RegisterDeterministicScalarFunction, RegisterCollationUtf8 and RegisterModule, plus Must* variants of the first four, each registering on that Driver alone; the methods are safe to call concurrently, and the zero Driver is ready to use as-is. vtab.RegisterModule also honours its db argument now: a non-nil db registers on the driver backing it when that driver implements the new vtab.ModuleRegisterer, while a nil db keeps targeting the driver this package registers as sqlite. One existing pattern changes behavior, narrowly and loudly: vtab.RegisterModule(db, ...) where db was opened on a caller-constructed Driver used to discard the db argument and land on the sqlite driver, reaching every connection in the process; it now lands on the constructed driver alone, so a sql.Open("sqlite") connection that used to resolve such a module gets no such module instead. The same pattern is also the one way an existing program could hold one module name on both a constructed Driver and the package-level one: there the first of the two registrations used to win and the second was refused as already registered, whereas now the package-level implementation wins on the constructed Driver's connections regardless of the order they ran in. Reaching that case at all means the program ignored an error the older version returned. Two smaller deviations round out the list: Driver.RegisterModule reports no error for such a collision, and vtab.RegisterModule now validates its name and module arguments before the not-implemented check, so a call with an empty name that returned vtab: RegisterModule not wired into engine outside this driver returns vtab: module name must be non-empty instead. Everything else is additive against v1.56.0: the package-level registration functions target the same driver they always did, connections still receive every module registered through the package-level path whichever Driver opened them, and a db opened on the sqlite driver resolves to that same driver. The isolating change discussed in [GitLab issue #254](https://gitlab.com/cznic/sqlite/-/issues/254) is deliberately not made here.
  • See [GitLab merge request #135](https://gitlab.com/cznic/sqlite/-/merge_requests/135), thanks Ian Chechin!
  • Promote freebsd/386, freebsd/arm and netbsd/amd64 to fully supported platforms. All three are now listed in the package documentation's platform table, which had carried seventeen entries while this module shipped, cross-built and tested twenty. They arrived as experimental in v1.53.0 — netbsd/amd64 reviving a port that had been broken for years, freebsd/386 replacing a stale, effectively untested SQLite 3.41 transpile, and freebsd/arm entirely new — and were deliberately kept out of that table until they had accumulated real-world exposure, with promotion promised once "a period of broader real-world testing … elapses without surprises". That period has elapsed: all three have been in the builder test matrix and in make build_all_targets since v1.53.0, all three pass the full test suite on this release's commit alongside the seventeen platforms already listed, and no open issue reports a defect in any of them. The two netbsd/amd64 build failures filed before the revival, [GitLab issue #202](https://gitlab.com/cznic/sqlite/-/issues/202) and [GitLab issue #234](https://gitlab.com/cznic/sqlite/-/issues/234), no longer reproduce at this commit: Xsqlite3_is_interrupted is present in the sources that target selects, and the mu.enter/mu.leave symbols that broke the build are gone. Documentation only — the transpiled sources under lib/ are byte-for-byte what v1.56.0 shipped, and nothing about how these targets behave changes.

• 2026-08-03 v1.56.0:

  • Re-vendor the transpiled SQLite sources, picking up modernc.org/libsqlite3's fix for an upstream data-corruption bug in SQLite 3.53.3's journal rollback. The SQLite version is unchanged at 3.53.3; what changes is that the amalgamation is now patched before it is transpiled. 3.53.3 reworked readSuperJournal() to return the super-journal name through a char** out-parameter, and pager_playback() now tests that pointer where it used to test zSuper[0]. A crash during the commit of a multi-database (ATTACH) transaction can leave the super-journal name and its checksum zeroed while the name length and the trailing magic survive; the checksum is a plain byte sum, so an all-zero name still validates and readSuperJournal() hands back a non-NULL pointer to an empty string. pager_playback() then calls sqlite3OsAccess(pVfs, "", SQLITE_ACCESS_EXISTS), gets ENOENT, and deletes the hot journal without playing it back — leaving the database corrupted. This is not a transpilation artifact: a plain gcc build of the stock 3.53.3 amalgamation fails on the same bytes while 3.53.2 recovers them, and it is what has been making upstream's own test/crash.test fail intermittently, in roughly 2% of runs, on every platform. The patch restores the pre-3.53.3 behaviour of reporting a (nul) super-journal name and will be dropped once upstream ships its own fix. Every supported target carries it.
  • Two targets change beyond that patch. On linux/s390x the regenerated transpile allocates C bit-fields MSB-first, as the big-endian platform ABI requires, rather than LSB-first; this comes from modernc.org/cc/v4 v4.29.1 and touches bit-field accesses throughout the SQLite core, s390x being this module's only big-endian target. On linux/riscv64 the transpile was regenerated on a host running GCC 11.4.0 where the previous one used GCC 13.3.0, which drops a handful of unexported compiler-predefined macro constants (the __FLT16_* family, __DBL_IS_IEC_60559__ and friends) and changes the COMPILER=gcc-13.3.0 entry PRAGMA compile_options reports to COMPILER=gcc-11.4.0; no SQLite code generation differs. Every other target's generated code is byte-identical to v1.55.0 apart from the journal-rollback patch above.
  • Bump the pinned modernc.org/libc to v1.74.4, and the remaining dependencies to their current releases. v1.74.2 and v1.74.3 are retracted upstream — a freeaddrinfo lock leak that deadlocks name resolution — and v1.74.4 is the fix. As always, downstream modules must pin the exact modernc.org/libc version this module's go.mod pins (see [GitLab issue #177](https://gitlab.com/cznic/sqlite/-/issues/177)).
  • Documentation sweep. openbsd/amd64 and openbsd/arm64 join the supported platforms table in the package documentation: both have been in the builder test matrix since January and are cross-built by make build_all_targets, but had never been listed. The vfs DSN query parameter — which names a VFS registered with SQLite, such as one returned by vfs.New — is now documented alongside the other DSN parameters on Driver.Open. The "Debug and development versions" section no longer describes a GO_GENERATE environment variable and a go generate that this repository has not had since generator.go moved to modernc.org/libsqlite3; it now points at that repository and make vendor instead, and the stale //go:generate directive naming the removed file is dropped with it. modernc.org/sqlite/vec and modernc.org/sqlite/vfs gained the package doc comments they were missing, so both finally carry a synopsis on pkg.go.dev. Documentation only; no behavior changes.
  • Add NewConnector, returning a database/sql/driver.Connector for use with sql.OpenDB. It opens the same connections sql.Open("sqlite", dsn) does, from the same registered driver, so every function, collation, connection hook and virtual table module registered through this package applies to them. It exists for callers that need to interpose on the physical connections database/sql opens — tracing, metrics, connection-scoped setup — which sql.Open gives no access to: such a caller can embed the returned Connector, override Connect, and pass its own wrapper to sql.OpenDB. Previously the only way to reach the registered driver was the db, _ := sql.Open("sqlite", ""); drv := db.Driver(); db.Close() idiom, which works only because sql.Open does not connect and this driver does not implement driver.DriverContext; and the only way to get a wrapper into a *sql.DB was sql.Register, which is process-global, panics on a name it has already seen, and cannot be undone, so a library had to invent a unique driver name per configuration. sql.OpenDB registers nothing. Constructing a &sqlite.Driver{} is not an alternative — its fields are unexported, so it carries none of the registrations. NewConnector checks the DSN only as far as it can without opening a database — a query string that does not parse, and conflicting vfs parameters; everything else continues to be validated when the connection is opened, so an unknown parameter or an out-of-range value is reported by Connect rather than at construction. Nothing about the existing sql.Open path changes: *Driver deliberately still does not implement driver.DriverContext, so sql.Open remains lazy and DSN errors continue to surface where they always have. A runnable sample is in examples/connector. Resolves [GitLab issue #253](https://gitlab.com/cznic/sqlite/-/issues/253), thanks Alessandro Segala (@​ItalyPaleAle)!
  • Document that a caller-constructed sqlite.Driver is not the driver this package registers as "sqlite". Its fields are unexported, so it starts with no functions, collations or connection hooks and the only way to give it any is its own RegisterConnectionHook method; the package-level Register* functions always apply to the registered driver. Connections such a Driver opens therefore run without the package-level functions and collations — and because a registered function silently replaces a SQLite built-in of the same name, a Driver you construct can evaluate upper(x), date(x) and the like differently from one opened through sql.Open. Virtual table modules are the one exception: they are held process-globally and reach every Driver. Constructing one remains supported for the private-hook pattern — a driver registered under a name of its own with sql.Register so its connection hooks apply only to its own connections — and is otherwise best avoided in favour of sql.Open or NewConnector. Documentation only; no behavior changes.

• 2026-07-20 v1.55.0:

  • Add github.com/mattn/go-sqlite3-compatible shorthand DSN query parameters to ease migration from that driver: _busy_timeout/_timeout, _foreign_keys/_fk, _journal_mode/_journal, _synchronous/_sync, _auto_vacuum/_vacuum, and _query_only, each setting the correspondingly named PRAGMA. Values are validated against the same set mattn/go-sqlite3 accepts (case-insensitive) and an unrecognized value fails the connection with an error, so a typo such as _synchronous=fu1l or _foreign_keys=yes_please is reported rather than silently downgrading durability or dropping foreign-key enforcement. The keys are applied in a fixed order independent of their order in the DSN — _busy_timeout and _auto_vacuum before any _pragma values (auto_vacuum must be set before the database is first written), the rest after, and _query_only last — and where a key and its alias are both supplied the alias wins, matching mattn/go-sqlite3; selection is by presence rather than by value, so supplying the alias empty (_foreign_keys=on&_fk=) suppresses the PRAGMA rather than deferring to the primary key, again matching that driver. Behavior change to note: prior releases ignored these keys entirely, so a DSN carried over from a mattn/go-sqlite3 setup changes in two ways. A recognized key that previously did nothing now takes effect — _foreign_keys=on begins enforcing constraints against data that may already violate them, _journal_mode=wal persistently converts the database file, and _query_only=1 makes the connection read-only. And a value outside the accepted set now fails the connection with an error where the same DSN previously opened successfully — for example a duration-style _busy_timeout=5s or _timeout=5000ms, neither of which is the integer that key requires. Review such DSNs before upgrading. _pragma is unchanged and no pre-existing parameter changes meaning, though see the following entry for a change in when all of them are validated.
  • See [GitLab merge request #134](https://gitlab.com/cznic/sqlite/-/merge_requests/134), thanks Toni Spets (@​beeper-hifi) and Ian Chechin!
  • Validate every DSN query parameter before applying any of them. Parameters were previously checked as each was reached, so a DSN whose later parameter was rejected had already executed the PRAGMAs ahead of it. Because PRAGMA journal_mode and PRAGMA auto_vacuum are persistent changes to the database file, a DSN such as file:x.db?_journal_mode=wal&_synchronous=bogus failed the connection and yet left x.db converted to WAL. A failed Open now leaves the database as it found it. This covers the pre-existing _txlock, _timezone, _time_format, _time_integer_format, _inttotime and _texttotime parameters as well as the shorthand keys above: all of them were validated only after the _pragma list had already run, so the same DSN shape — a valid _pragma=journal_mode=wal alongside a misspelled _txlock — converted the file before reporting the error. Only the values accepted for each parameter are unchanged; a DSN that opened successfully before still opens, and one that failed still fails with the same error. _pragma remains the sole exception, since its values are executed verbatim and cannot be checked in advance: a malformed _pragma is still rejected by SQLite as it runs, after any earlier _pragma in the list has taken effect.

• 2026-07-15 v1.54.0:

  • Upgrade to SQLite 3.53.3. This also bumps the pinned modernc.org/libc to v1.74.1; as always, downstream modules must pin the exact same modernc.org/libc version this module's go.mod pins (see [GitLab issue #177](https://gitlab.com/cznic/sqlite/-/issues/177)).
  • Under the opt-in _texttotime DSN parameter, best-effort parse date-shaped TEXT values from columns SQLite reports with an empty declared type — aggregates and expressions over a date column (MAX(d), COALESCE(d, ...), upper(d), d || ''), subqueries, and typeless real columns (CREATE TABLE t(x)) — into time.Time, instead of delivering them as a raw string that Scan cannot store into a *time.Time. The existing declared DATE/DATETIME/TIME/TIMESTAMP path is unchanged; this only adds the empty-decltype case. The conversion is strictly best-effort: a value that does not parse as a time falls through to the original string, so no Scan that worked before can newly fail. ColumnTypeScanType continues to report string for empty-decltype columns, since the declared type cannot prove the column is temporal. Without _texttotime the behavior is byte-for-byte unchanged. Resolves [GitLab issue #248](https://gitlab.com/cznic/sqlite/-/issues/248).
  • See [GitLab merge request #133](https://gitlab.com/cznic/sqlite/-/merge_requests/133), thanks Ian Chechin!

• 2026-06-21 v1.53.0:

  • Add experimental netbsd/amd64 support, resolving the long-standing build break in [GitLab issue #246](https://gitlab.com/cznic/sqlite/-/issues/246). This target is intentionally not yet listed among the supported platforms in the package documentation: the port had been broken for years and is only now revived, and there is as yet no real-world experience running it under production workloads. Green CI is not the same as battle-tested — so while the full test suite (including the pcache and vec packages and the -race concurrency test) passes on NetBSD 10.1 / Go 1.26.3, and the entire upstream toolchain (libc, cc, ccgo, libz, libtcl8.6, libsqlite3, libsqlite_vec) is green on the NetBSD CI builder, the target is offered for evaluation only. If you run NetBSD, please exercise it with your own workloads and report back via #246; the intent is to promote it to a fully supported platform after a period of broader real-world testing (on the order of a month) elapses without surprises.
  • Implementation notes: the previously shipped lib/sqlite_netbsd_amd64.go was a stale old-generator transpile that no longer compiled (the mu.enter/mu.leave break in #246); it is replaced by a fresh new-generator transpile consistent with every other platform, and modernc.org/sqlite/vec (sqlite-vec) is vendored and auto-registers on netbsd. Correct operation requires the matching pinned modernc.org/libc, which carries two NetBSD-specific fixes found during this work: the mmap(2) PAD-argument ABI (without it, concurrent WAL access faults with SIGBUS in the WAL-index shared memory) and a working abort(3) (the prior stub left SQLite's crash-recovery writecrash test unable to terminate by signal). As usual, downstream modules must pin the exact modernc.org/libc version this module's go.mod pins.
  • See [GitLab merge request #82](https://gitlab.com/cznic/sqlite/-/merge_requests/82), thanks Leonardo Taccari (@​iamleot) and Thomas Klausner (@wiz)!
  • Add experimental freebsd/386 and freebsd/arm support. As with the netbsd/amd64 target above, these two 32-bit FreeBSD ports are intentionally not yet listed among the supported platforms in the package documentation: freebsd/386 previously shipped a stale, effectively untested SQLite 3.41 transpile, and freebsd/arm is entirely new, so neither has real-world production mileage yet. Both are now freshly transpiled at SQLite 3.53.2 consistent with every other platform, build cleanly, and pass the full test suite (core, WAL/concurrency, and the vec package) on the FreeBSD CI builders; they are offered for evaluation only. If you run 32-bit FreeBSD, please exercise these targets with your own workloads and report back — the intent is to promote freebsd/386, freebsd/arm, and netbsd/amd64 to fully supported platforms in a future release cycle, once a period of broader real-world testing elapses without surprises.
  • Implementation notes: correct operation on freebsd/arm requires the matching pinned modernc.org/libc (v1.73.4), which fixes the per-arch mmap(2) off_t encoding for 32-bit FreeBSD; without it the WAL shared-memory mapping faults with SIGBUS under concurrent access, the same class of bug found on the netbsd port. As usual, downstream modules must pin the exact modernc.org/libc version this module's go.mod pins.
  • See [GitLab merge request #119](https://gitlab.com/cznic/sqlite/-/merge_requests/119), thanks Olivier Cochard-Labbé (@​ocochard)!
  • Add a Go-facing wrapper for SQLITE_CONFIG_PCACHE2. PageCache is the factory and Cache the per-database instance, both idiomatic Go interfaces; Page exposes the raw Buf and Extra pointers that SQLite reads through the C pcache contract. RegisterPageCache and MustRegisterPageCache install the module process-globally before the first sql.Open; subsequent Open calls are gated through a one-shot Xsqlite3_config(SQLITE_CONFIG_PCACHE2) so a too-late Register returns ErrPageCacheTooLate rather than silently falling through to the built-in pcache1. The binding owns the sqlite3_pcache_page stub and re-consults the implementation on every Fetch, reusing the stub only when the returned Page value is unchanged, which keeps a bounded/evicting purgeable cache safe by construction.
  • See [GitLab merge request #126](https://gitlab.com/cznic/sqlite/-/merge_requests/126), thanks Ian Chechin!
  • Add modernc.org/sqlite/pcache, the reference page-cache implementation that accompanies the #126 SQLITE_CONFIG_PCACHE2 wrapper. pcache.New returns a *Pool satisfying the PageCache interface; register it once with sqlite.MustRegisterPageCache(pcache.New()) and every connection opened afterwards draws its pages from it. Each Pool.Create mints a fresh per-database Cache: a bounded, LRU-evicting page store that honours the PRAGMA cache_size soft cap and releases the least-recently-unpinned page when it must make room. Page memory — the Buf and Extra buffers SQLite reads through — is allocated with libc.Xmalloc/libc.Xcalloc and therefore lives off the Go heap, which keeps SQLite's interior pointer arithmetic on the page extras from tripping the race detector's checkptr enforcement. Pool.Stats reports aggregate lifetime counters (hits, misses, allocs, evictions, rekeys, truncates, caches) across every cache a Pool has created, so hit/miss/eviction behaviour is observable without instrumenting individual caches. Cross-connection page sharing is out of scope for now; each Create returns an independent per-database cache.
  • Validated end-to-end against the #126 stress workload (cache_size=16, 4000 BLOB rows with DELETE and incremental_vacuum, integrity_check clean under -race) and benchmarked for the memory-utilization goal tracked in [GitLab issue #204](https://gitlab.com/cznic/sqlite/-/issues/204).
  • See [GitLab merge request #127](https://gitlab.com/cznic/sqlite/-/merge_requests/127), thanks Ian Chechin!
  • Tighten the modernc.org/sqlite/pcache reference implementation per cznic's !127 review follow-ups. Adds Stats.EasyRefusals, a per-Pool counter for the cases where FetchCreateEasy returns nil at cap; SQLite reacts to a refusal by spilling dirty pages and retrying with FetchCreateForce, so the new field is a direct proxy for the I/O pressure the strict Easy contract imposes vs pcache1's recycle-without-spill behavior. BenchmarkPoolEvictionChurn was reworked to drive a rotating-residue DELETE (k % 3 = i % 3) and re-insert a matching batch each cycle so the spill pressure recurs and easy-refusals/op scales with b.N instead of capping at the seed's one-time first-cycle cost; both existing benchmarks now report easy-refusals/op alongside the page-allocs/evictions metrics. Stats.Evictions documentation was tightened to match the actual behavior (counts LRU eviction, Unpin(discard=true), Shrink releases, and Unpin(discard=false) trimming back to target after a FetchCreateForce overcommit; bulk frees from Truncate, Rekey collisions, and Destroy are not counted). The TestPoolRoundTripIntegrity comment claiming the workload exercises xRekey ~15 times has been corrected; the SQL surface does not reliably emit xRekey here, and that codepath is covered by the unit tests instead.
  • See [GitLab merge request #130](https://gitlab.com/cznic/sqlite/-/merge_requests/130), thanks Ian Chechin!
  • Make modernc.org/sqlite/pcache -race-clean under SQLite's cache=shared mode. The pool already runs correctly under shared-cache because every callback into a given Cache is serialised internally by SQLite's sqlite3BtreeEnter on the BtShared mutex; verified empirically with a lock-free in-flight probe (max-in-flight = 1 on the canonical two-connection workload, 4 on a positive control with goroutines hitting the cache directly). However the Go race detector does not recognise SQLite's libc mutex as a happens-before edge and reports false-positive races on Fetch vs Unpin reads/writes of the per-cache state, which surfaces as DATA RACE failures for any user who registers the pool and runs their suite under -race. A sync.Mutex on the cache type is now taken on every public method (SetSize, PageCount, Fetch, Unpin, Rekey, Truncate, Destroy, Shrink), always. On the common non-shared-cache path the lock is uncontended (one atomic CAS per Lock/Unlock pair, negligible next to the SQLite work it bookends); on the shared-cache path it just rubber-stamps the order SQLite's BtShared mutex already established. A new e2e_test.go TestSharedCacheTwoConns_Integrity drives two sql.Conn against the same cache=shared URI with concurrent writers and asserts PRAGMA integrity_check = ok under -race; passes cleanly with the lock, would surface the false-positive without it. Design notes live in pcache/sharing.go.
  • See [GitLab merge request #131](https://gitlab.com/cznic/sqlite/-/merge_requests/131), thanks Ian Chechin!
  • Add a Go wrapper for sqlite3_db_status, the per-connection runtime counters (cache hit/miss/write/spill rates, schema and prepared-statement memory, lookaside usage, deferred foreign keys). DBStatus is an interface implemented by the driver connection and reached through the database/sql escape hatch (*sql.Conn).Raw(), mirroring the existing FileControl surface; DBStatusOp is a distinct typed enum of the SQLITE_DBSTATUS_* verbs so a counter from a different op family will not compile in its place. Status(op, reset) returns the (current, high) pair and optionally resets the counter. This also lets modernc.org/sqlite/pcache measure real I/O instead of the EasyRefusals proxy: the new BenchmarkPoolSpillIO reads the pager-level SQLITE_DBSTATUS_CACHE_SPILL/_CACHE_WRITE counters, which the pager maintains identically for pcache1 and the pool, making the pcache1-vs-pool comparison cznic raised on the !127 review a genuine apples-to-apples measurement. On the rotating-residue eviction-churn workload at cache_size=16 the pool spills ~3.5x more than pcache1 (cache-spill/op 31.96 vs 8.96) for ~3% more page writes (cache-write/op 450 vs 436) at identical hit/miss, quantifying the I/O cost of the strict Easy contract that EasyRefusals only proxied.
  • See [GitLab merge request #132](https://gitlab.com/cznic/sqlite/-/merge_requests/132), thanks Ian Chechin!
  • Add an opt-in _dqs DSN query parameter that disables SQLite's double-quoted string literal compatibility quirk on a per-connection basis. When _dqs=0 (or any strconv.ParseBool false value) is supplied, the driver calls sqlite3_db_config with SQLITE_DBCONFIG_DQS_DDL and SQLITE_DBCONFIG_DQS_DML set to off before any statement is prepared, so a double-quoted identifier that fails to resolve raises a parse error instead of silently falling back to a string literal. Absence of the parameter, or _dqs=1, leaves SQLite's default behavior unchanged; existing DSNs continue to work byte-for-byte. Resolves [GitLab issue #61](https://gitlab.com/cznic/sqlite/-/issues/61).
  • See [GitLab merge request #128](https://gitlab.com/cznic/sqlite/-/merge_requests/128), thanks Ian Chechin!

... (truncated)

• 6e86ac4 doc.go, CHANGELOG.md: promote freebsd/386, freebsd/arm and netbsd/amd64
• 47d0960 Merge branch 'driver-registration' into 'master'
• 9ed2aad CHANGELOG.md: document the per-Driver registration methods
• 20e2e17 sqlite: let a caller-constructed Driver register its own functions, collation...
• 15039fd all_test: make TestConnectionHook survive -count>1
• 224fef6 all_test: drop a trailing space gofmt flags
• 50ee6dd vendor_libs: handle a deduplicated libsqlite3/libsqlite_vec checkout
• 15ca503 licensing: ship the sqlite-vec MIT notice, normalize the license names
• 69cd3ca GOVERNANCE.md: add Ian Chechin as maintainer
• 198be3c all_test: tolerate a cgo-less toolchain in the recursive -race check
• Additional commits viewable in compare view