deps: bump modernc.org/sqlite from 1.50.1 to 1.51.0

[dependabot]

Bumps modernc.org/sqlite from 1.50.1 to 1.51.0.

Changelog

Sourced from modernc.org/sqlite's changelog.

Changelog

• 2026-05-28 v1.52.0:

  • Add Backup.Remaining and Backup.PageCount, thin wrappers around the existing sqlite3_backup_remaining and sqlite3_backup_pagecount C symbols. Together they expose the per-Step progress counters that the underlying backup object already maintains, enabling progress reporting during online backups without dropping to modernc.org/sqlite/lib directly.
  • See [GitLab merge request #122](https://gitlab.com/cznic/sqlite/-/merge_requests/122), thanks Ian Chechin!
  • Drop the redundant second copy in (*conn).columnText, the path that backs every Rows.Scan into a Go string for a TEXT column. The value's bytes are still copied once out of SQLite-owned memory into a fresh Go buffer; that buffer is then reinterpreted as the result string with unsafe.String rather than copied a second time by the implicit string([]byte) conversion. This removes one allocation per TEXT value per row and roughly halves the bytes allocated on that path; on the new BenchmarkColumnTextScan cases it is ~13–20% faster for payloads of 256 B and larger, with no measurable change for very short strings. Purely internal: no API or behavioral change, and the returned string never aliases SQLite's buffer.
  • See [GitLab merge request #123](https://gitlab.com/cznic/sqlite/-/merge_requests/123), thanks Ian Chechin!

• 2026-05-28 v1.51.0:

  • Pool the []driver.Value slice passed to scalar/aggregate UDF callbacks and to vtab Filter/Insert/Update callbacks, eliminating the dominant per-row allocation on UDF-heavy queries. Benchmarks on a 1000-row, 3-arg noop scalar UDF show ~40% fewer bytes/op and ~15% fewer allocs/op.
  • Document the matching "arguments are not valid past return" contract on vtab.Cursor.Filter and vtab.Updater.Insert/Update, consistent with the existing rule for FunctionImpl.Scalar / AggregateFunction.Step / WindowInverse.
  • Resolves [GitLab issue #226](https://gitlab.com/cznic/sqlite/-/issues/226). See [GitLab merge request #114](https://gitlab.com/cznic/sqlite/-/merge_requests/114), thanks Ian Chechin!
  • Add FileControl.FileControlDataVersion, a wrapper around SQLITE_FCNTL_DATA_VERSION for observing pager-cache data-version changes, including those made on the same connection. Useful as a primitive for application-level cache invalidation.
  • Exposed via the idiomatic database/sql escape hatch (*sql.Conn).Raw(), consistent with the existing FileControlPersistWAL.
  • See [GitLab merge request #115](https://gitlab.com/cznic/sqlite/-/merge_requests/115), thanks Ian Chechin!
  • Fix a regression where in-memory connections (:memory:, file::memory:, shared-cache memory URIs) were discarded by database/sql after a context-cancelled query, taking the entire in-memory store with them. The fix for #198 had added an sqlite3_is_interrupted check to the connection validator that mistakenly applied to in-memory connections too, re-introducing the bug originally fixed by !74. File-backed connections keep the existing behaviour and are still discarded after an interrupt.
  • Resolves [GitLab issue #196](https://gitlab.com/cznic/sqlite/-/issues/196). See [GitLab merge request #116](https://gitlab.com/cznic/sqlite/-/merge_requests/116), thanks Ian Chechin!
  • Add an opt-in FunctionImpl.VolatileArgs flag that hands TEXT and BLOB arguments to scalar and aggregate UDF callbacks as zero-copy views (unsafe.String/unsafe.Slice) over SQLite's own value buffers, eliminating the per-argument libc.GoString/make([]byte) copy that the #226 slice-pooling left as the remaining per-row allocation. On the same 1000-row, 3-arg (INTEGER/TEXT/BLOB) noop scalar UDF this removes a further ~35% of allocs/op and ~11% of bytes/op on top of #226.
  • The views are valid only for the duration of the callback and must not be retained past return or across rows; a callback that needs to keep a value must copy it. With VolatileArgs unset (the default) arguments keep the existing copied, caller-owned semantics, so the flag is fully backward compatible; it has no effect on integer, float, time, or NULL arguments.
  • See [GitLab merge request #120](https://gitlab.com/cznic/sqlite/-/merge_requests/120), thanks Ian Chechin!
  • Extend the opt-in VolatileArgs zero-copy TEXT/BLOB argument access from #120 to the virtual-table Cursor.Filter (xFilter) and Updater.Insert/Update (xUpdate) callbacks. A vtab.Module opts in by implementing the new optional vtab.VolatileArgsOpter interface (VolatileArgs() bool); the flag is read once at module registration and shared by every table created from it. On a vtab call carrying one TEXT and one BLOB argument this removes 2 allocs/op (one libc.GoString, one make([]byte)) on each of the Filter and Update paths.
  • The same safety contract as #120 applies: the views are valid only for the duration of the callback and must not be retained past return or across rows; a callback that needs to keep a value must copy it. Modules that do not implement VolatileArgsOpter (the default for all existing modules) are byte-for-byte unchanged, and the flag has no effect on integer, float, time, or NULL arguments.
  • See [GitLab merge request #121](https://gitlab.com/cznic/sqlite/-/merge_requests/121), thanks Ian Chechin!

• 2026-05-10 v1.50.1:

  • Upgrade to SQLite 3.53.1.

• 2026-04-24 v1.50.0:

  • Upgrade to sqlite-vec v0.1.9.
  • Introduce ColumnInfo, enabling dynamic query builders and ORMs to retrieve underlying SQLite C-API metadata (OriginName, TableName, DatabaseName, and DeclType).
  • This feature is exposed via the idiomatic database/sql escape hatch (*sql.Conn).Raw(), avoiding custom statement handles and keeping the standard library workflow intact.
  • See [GitLab merge request #113](https://gitlab.com/cznic/sqlite/-/merge_requests/113), thanks Josh Bleecher Snyder!

• 2026-04-17 v1.49.0: Upgrade to SQLite 3.53.0.

  • Added -DSQLITE_ENABLE_DBPAGE_VTAB to the transpilation. See "The SQLITE_DBPAGE Virtual Table" for details.

• 2026-04-06 v1.48.2:

  • Fix ABI mapping mismatch in the pre-update hook trampoline that caused silent truncation of large 64-bit RowIDs.
  • Ensure the Go trampoline signature correctly aligns with the public sqlite3_preupdate_hook C API, preventing data corruption for high-entropy keys (e.g., Snowflake IDs).
  • See [GitLab merge request #98](https://gitlab.com/cznic/sqlite/-/merge_requests/98), thanks Josh Bleecher Snyder!
  • Fix the memory allocator used in (*conn).Deserialize.
  • Replace tls.Alloc with sqlite3_malloc64 to prevent internal allocator corruption. This ensures the buffer is safely owned by SQLite, which may resize or free it due to the SQLITE_DESERIALIZE_RESIZEABLE and SQLITE_DESERIALIZE_FREEONCLOSE flags.
  • Prevent a memory leak by properly freeing the allocated buffer if fetching the main database name fails before handing ownership to SQLite.
  • See [GitLab merge request #100](https://gitlab.com/cznic/sqlite/-/merge_requests/100), thanks Josh Bleecher Snyder!
  • Fix (*conn).Deserialize to explicitly reject nil or empty byte slices.
  • Prevent silent database disconnection and connection pool corruption caused by SQLite's default behavior when sqlite3_deserialize receives a 0-length buffer.
  • See [GitLab merge request #101](https://gitlab.com/cznic/sqlite/-/merge_requests/101), thanks Josh Bleecher Snyder!
  • Fix commitHookTrampoline and rollbackHookTrampoline signatures by removing the unused pCsr parameter.
  • Aligns internal hook callbacks accurately with the underlying SQLite C API, cleaning up the code to prevent potential future confusion or bugs.
  • See [GitLab merge request #102](https://gitlab.com/cznic/sqlite/-/merge_requests/102), thanks Josh Bleecher Snyder!

... (truncated)

Commits

• a5f439b CHANGELOG.md: fix release tag
• 41e77be CHANGELOG.md: document #121
• 827df98 gofmt -l -s -w vtab/*.go
• 0d384cb Merge branch 'feat/vtab-volatile-args-opt-in' into 'master'
• 06e06d5 extend VolatileArgs opt-in to vtab Filter and Updater Insert/Update
• 2486abd HACKING.md, CLAUDE.md: this repo is not auto-tagged, tagging is manual
• d808a8f CHANGELOG.md: document #120
• fac1cab Merge branch 'feat/volatile-args-opt-in' into 'master'
• 569614c address review: empty-BLOB shape parity + re-entrancy note
• 905960c add FunctionImpl.VolatileArgs opt-in for zero-copy TEXT/BLOB args
• Additional commits viewable in compare view

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AI Code Review

What Looks Good

• Clean dependency bump updating only go.mod and go.sum files
• No code changes, syntax modifications, or architectural impacts
• Changelog shows performance improvements and bug fixes (zero-copy optimizations, in-memory connection fix)
• Maintains pure Go SQLite driver usage (no CGO required)
• Atomic change focused solely on dependency update

Recommendation

Approve. The PR is a straightforward, safe dependency update with no violations of project guidelines or checklist requirements. No further action needed.

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