AltSql v0.4.1

• musl's license in the release archives. The static Linux binaries link
  musl libc, whose MIT license asks for its notice to come with them. 0.4.0's
  archives left it out. THIRD-PARTY-LICENSES.txt now holds musl's license
  and comes in every archive; in the Linux ones it's followed by the copyright
  file of the exact musl package the binaries were built with. NOTICE names
  musl too. The code is unchanged from 0.4.0.

Downloads

System	File
Linux, x86-64 (static)	altsql_linux_amd64.tar.gz
Linux, ARM64 (static)	altsql_linux_arm64.tar.gz
macOS, Apple silicon	altsql_darwin_arm64.tar.gz
macOS, Intel	altsql_darwin_amd64.tar.gz

Each archive holds the two shells, altsql for a device's database and altsql-db for a gateway's, with README.md, LICENSE, NOTICE and THIRD-PARTY-LICENSES.txt (musl's MIT license, for the static Linux binaries). SHA256SUMS lists the checksums. The macOS binaries aren't signed by Apple, so macOS may ask you to allow them the first time, or run xattr -d com.apple.quarantine on each. AltSql is an alpha: file formats may still change, and it isn't for production.

AltSql v0.4.0

The first AltSql release published with ready-built binaries for every
system, made and checked by the release workflow. The engine's behaviour is
unchanged from 0.3.0-alpha; file format version 3 is unchanged too.

• One version for both. AltSql Core and AltSql DB now share one version
  number, 0.4.0. Core was 0.1.0-alpha and DB 0.3.0-alpha; altsql-db --version prints both, and both now say 0.4.0.
• Binaries for Linux and macOS. altsql and altsql-db for Linux x86-64
  and ARM64 (static) and for macOS on Apple silicon and Intel, as
  altsql_<system>_<arch>.tar.gz on the release page. Each build runs the
  end-to-end shell test before the release goes out. The names carry no
  version, so the releases/latest/download/ links stay the same.
• macOS. AltSql DB built with -D_POSIX_C_SOURCE alone couldn't see
  F_FULLFSYNC and didn't compile. The sync now falls back to fsync when
  F_FULLFSYNC is hidden, and both Makefiles add -D_DARWIN_C_SOURCE on
  macOS, so a sync there reaches the disk.
• Tests on every push. Core's tests, DB's tests and the shell test run on
  Linux x86-64, Linux ARM and macOS (.github/workflows/test.yml). A green
  run on main with a new version is what publishes a release; see
  RELEASING.md.
• Tests give the same data on every compiler. Some tests passed two or
  three random draws as arguments to one call, and C leaves the order of
  those unspecified: gcc on x86-64 drew them right to left, clang and gcc on
  ARM left to right. The ARM builds made other test data, and with it one
  statement in test_savepoint needed more savepoint room than its cache
  allowed (a documented limit, so a failed transaction, as designed). Each
  draw now has its own line, in gcc's x86-64 order, so every recorded result
  stays valid: the outputs of all nine suites are byte for byte the same as
  before under gcc, and the same under clang. test_vs_sqlite, which isn't
  run in CI, keeps its old calls.
• The browser demo in demos/db/ is rebuilt at 0.4.0
  (app/engine-db.v4.js).
• Releases now live on the GitHub release page. releases/ keeps the
  0.2.0-alpha and 0.3.0-alpha folders as they were.

Downloads

System	File
Linux, x86-64 (static)	altsql_linux_amd64.tar.gz
Linux, ARM64 (static)	altsql_linux_arm64.tar.gz
macOS, Apple silicon	altsql_darwin_arm64.tar.gz
macOS, Intel	altsql_darwin_amd64.tar.gz

Each archive holds the two shells, altsql for a device's database and altsql-db for a gateway's, with README.md, LICENSE and NOTICE. SHA256SUMS lists the checksums. The macOS binaries aren't signed by Apple, so macOS may ask you to allow them the first time, or run xattr -d com.apple.quarantine on each. AltSql is an alpha: file formats may still change, and it isn't for production.

AltSql 0.1.0-alpha

First public release of AltSql: a native hybrid of key-value and SQL, from the sensor to the gateway. One small engine and one set of records, the same on the device and on the gateway, with nothing to translate in between.

What's in it

• AltSql Core 0.1.0-alpha, the engine: key-value and time-series on the device, SQL on the gateway, synced byte for byte. The whole engine is one C99 file, core/dist/altsql.h.
• AltSql DB 0.1.0-alpha, the database for a gateway that serves a whole fleet: one file for every device, read by key with no SQL step, or with SQL over the same records.
• The AltSql DB browser demo in demos/db/.

Status: alpha. Everything runs on a PC in simulation; nothing has run on a microcontroller or a gateway yet. File formats may still change. Not for production.

Try it: cd core && make test, then cd engines/db && make test. Live demos: https://altsql.com/demo/core/ and https://altsql.com/demo/db/

License: Apache 2.0. Copyright 2026 AltSql.com.