Yes, the rumors are true - it's release day! :tada: :tada:

We're gearing up for our big 1.0 release later this year, so this release has some great foundational API improvements, improves consistency across ours APIs, and adds some other fantastic foundational features!

Highlights

• Bumped to Rust 1.78
• We now regularly capture a snapshot of the database state, and restore from it when restarting the Database
• Tables are now private by default, and must be explicitly marked as public via #[spacetimedb(table(public))] or [SpacetimeDB.Table(Public = true)]
• Our SDKs now have consistent filter_by_* functions that return a collection of results, and find_by_* functions that return a single result
• Implement a new rand api which fixes bugs in our previous random number generator
• Bugfix: When the database is restarted, we properly treat all clients as disconnected

Big ones!

• Module hotswapping - You can now update your server logic with a new module without disconnecting existing clients! Players will keep on playing and clients will keep on clienting without being any the wiser!
• Recv-style ABI - We've improved the performance of passing data into your module from the host substantially by eliminating several allocations and copies.

CLI changes

• spacetime build uses the --project-path param instead of an anonymous param
• spacetime publish -c requires confirmation (can be overridden with --force)
• spacetime logs -f does not start from the very beginning

What's Changed

• impl PartialEq<ProductValue> for RowRef by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1164
• Use a custom FixedBitSet + optimize Page::iter_fixed_len by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1160
• Implement RelValue: Eq + Hash by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1107
• Fix soundness hole in Table::delete + don't make & immedately drop PVs in the method by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1162
• Add PR status check that fails unless based on master by @bfops in https://github.com/clockworklabs/SpacetimeDB/pull/1180
• Some clarifications to dropping the updates in eval incr by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1192
• perf(JoinInner): use AVs for keys instead of PVs by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1194
• Make Page always fully init by @gefjon in https://github.com/clockworklabs/SpacetimeDB/pull/1193
• Remove C# GetArgsAsObjectArray by @RReverser in https://github.com/clockworklabs/SpacetimeDB/pull/1188
• feat(1168): Track subscription query duration for each reducer by @joshua-spacetime in https://github.com/clockworklabs/SpacetimeDB/pull/1195
• Fix unsoundness in AlgebraicValue::type_of by making it partial by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1189
• From.{join => joins} + remove Option layer + Remove RelOps::try_fold by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1208
• subscription benches: reorder footprint fields by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1209
• C#: rename DbEventArgs to ReducerContext by @RReverser in https://github.com/clockworklabs/SpacetimeDB/pull/1191
• Bump to Rust 1.78 by @coolreader18 in https://github.com/clockworklabs/SpacetimeDB/pull/1205
• spacetime build uses --project-path param by @jdetter in https://github.com/clockworklabs/SpacetimeDB/pull/1212
• Remove some impls that were dead code by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1210
• CrudExpr::{Delete, Insert, Update}: only DbTables are possible, so cleanup InMem path by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1211
• Remove RowUpdate event from C# by @RReverser in https://github.com/clockworklabs/SpacetimeDB/pull/1190
• Switch to a better API for tagged enums for C# by @RReverser in https://github.com/clockworklabs/SpacetimeDB/pull/1177
• Remove a few dead impls by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1214
• commitlog: Allow folds to not allocate Mutations values by @kim in https://github.com/clockworklabs/SpacetimeDB/pull/1215
• Fix #1180: Add PR status check that fails unless based on master by @bfops in https://github.com/clockworklabs/SpacetimeDB/pull/1213
• Split up #735: auth.rs refactors by @bfops in https://github.com/clockworklabs/SpacetimeDB/pull/871
• Create a lockfile when opening config files by @gefjon in https://github.com/clockworklabs/SpacetimeDB/pull/1196
• Bump version to 0.9.0 by @bfops in https://github.com/clockworklabs/SpacetimeDB/pull/1055
• Add CODEOWNERS for rust-toolchain.toml by @bfops in https://github.com/clockworklabs/SpacetimeDB/pull/1221
• Fix select * from * by @coolreader18 in https://github.com/clockworklabs/SpacetimeDB/pull/1218
• CLI - Small refactors to identity code by @bfops in https://github.com/clockworklabs/SpacetimeDB/pull/1169
• Add CODEOWNERS for LICENSE.txt by @bfops in https://github.com/clockworklabs/SpacetimeDB/pull/1225
• Add CODEOWNERS for CODEOWNERS by @bfops in https://github.com/clockworklabs/SpacetimeDB/pull/1226
• spacetime publish: Add confirmation for -c by @bfops in https://github.com/clockworklabs/SpacetimeDB/pull/1038
• Make identity naming more consistent + fix bugs by @jdetter in https://github.com/clockworklabs/SpacetimeDB/pull/1140
• feat(1229): Double client channel capacity by @joshua-spacetime in https://github.com/clockworklabs/SpacetimeDB/pull/1230
• to_bsatn_extend/vec: use uninit instead of zeroed buffer by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1204
• refactor compile_read_only_query: dedup SideEffect errors by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1235
• Add test for select * from B join A on B.y = A.x by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1238
• Always send TransactionUpdate to the sender by @drogus in https://github.com/clockworklabs/SpacetimeDB/pull/1111
• row_count field to table by @Shubham8287 in https://github.com/clockworklabs/SpacetimeDB/pull/1242
• Simplify MutTxId::table_exists by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1246
• Remove unreachable branches from C# generate by @RReverser in https://github.com/clockworklabs/SpacetimeDB/pull/1247
• Table::get_fixed_row -> RowRef::get_row_data + Some docs by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1250
• Move StaticBsatnLayout code to its module + harden test by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1254
• Remove BTreeIndex::name again by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1251
• Atomically downgrade lock when committing tx to prevent deadlock by @coolreader18 in https://github.com/clockworklabs/SpacetimeDB/pull/1252
• Tiny change: slightly better logging of sled errors by @kazimuth in https://github.com/clockworklabs/SpacetimeDB/pull/1248
• Add PageHeader::unmodified_hash, a BLAKE3 hash for snapshotting by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1249
• Privatize Table::row_layout + related BTreeIndex refactoring by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1262
• core: Collapse DBIC into HostController by @kim in https://github.com/clockworklabs/SpacetimeDB/pull/1186
• Reserve sequence range for system tables by @kim in https://github.com/clockworklabs/SpacetimeDB/pull/1265
• Add fn ColList::last(&self) -> ColId by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1267
• Misc datastore cleanups & less cloning by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1263
• Module hotswapping by @coolreader18 in https://github.com/clockworklabs/SpacetimeDB/pull/1147
• Consistent filtering rules for Rust bindings by @RReverser in https://github.com/clockworklabs/SpacetimeDB/pull/1280
• recv-style abi by @coolreader18 in https://github.com/clockworklabs/SpacetimeDB/pull/1002
• feat(1231): Basic query cardinality estimation by @joshua-spacetime in https://github.com/clockworklabs/SpacetimeDB/pull/1273
• Simplify btree_index module with more idiomatic Rust by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1285
• Disconnect dangling clients by @kim in https://github.com/clockworklabs/SpacetimeDB/pull/1132
• CI workflows support workflow_dispatch event by @bfops in https://github.com/clockworklabs/SpacetimeDB/pull/1289
• Remove incremental-joins.md by @bfops in https://github.com/clockworklabs/SpacetimeDB/pull/1296
• Add table smoketest + more smoketest logging by @kazimuth in https://github.com/clockworklabs/SpacetimeDB/pull/1272
• Fix workflow_dispatch for ci.yml by @bfops in https://github.com/clockworklabs/SpacetimeDB/pull/1295
• Shub/st connected clients by @Shubham8287 in https://github.com/clockworklabs/SpacetimeDB/pull/1288
• Let ProgramStorage::external be async by @coolreader18 in https://github.com/clockworklabs/SpacetimeDB/pull/1291
• due cleanup in datastore test by @Shubham8287 in https://github.com/clockworklabs/SpacetimeDB/pull/1301
• fix(1297): spacetime logs -f should not start at the very beginning by @bfops in https://github.com/clockworklabs/SpacetimeDB/pull/1298
• merge_apply_inserts/deletes: do metrics work once per table, not per row by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1286
• Consistent filtering in Rust client + minor fixes by @RReverser in https://github.com/clockworklabs/SpacetimeDB/pull/1275
• Implement consistent filtering rules for C# modules by @RReverser in https://github.com/clockworklabs/SpacetimeDB/pull/1282
• Update C# codegen to consistent filtering rules by @RReverser in https://github.com/clockworklabs/SpacetimeDB/pull/1277
• Implement consistent filtering rules for TypeScript by @RReverser in https://github.com/clockworklabs/SpacetimeDB/pull/1276
• CLI - Fix Lockfile error message format strings by @bfops in https://github.com/clockworklabs/SpacetimeDB/pull/1302
• CLI - Drop Config lock earlier for spacetime logs by @bfops in https://github.com/clockworklabs/SpacetimeDB/pull/1303
• Facilitate eventual datastore crate by reducing visibilities and simplifying imports by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1306
• Commitlog: panic on fsync failure by @kim in https://github.com/clockworklabs/SpacetimeDB/pull/985
• execution_set.check_auth(...) on initial subscription by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1274
• Refactor check_auth + (walk_)sources using internal iteration in the latter by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1304
• Bump version to 0.9.3 by @bfops in https://github.com/clockworklabs/SpacetimeDB/pull/1224
• feat(1231): Add a configurable row limit for queries by @joshua-spacetime in https://github.com/clockworklabs/SpacetimeDB/pull/1293
• NFC: use record struct for auto-equality in C# by @RReverser in https://github.com/clockworklabs/SpacetimeDB/pull/1318
• Fix FilterBy regression in C# by @RReverser in https://github.com/clockworklabs/SpacetimeDB/pull/1309
• Bump ABI version for C# AOT by @RReverser in https://github.com/clockworklabs/SpacetimeDB/pull/1311
• Implement new rand api by @coolreader18 in https://github.com/clockworklabs/SpacetimeDB/pull/1283
• metric for table size by @Shubham8287 in https://github.com/clockworklabs/SpacetimeDB/pull/1319
• Automated bot tests by @kazimuth in https://github.com/clockworklabs/SpacetimeDB/pull/1255
• Restrict multi-col index scans to = (OpCmp::Eq) on all columns by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1316
• Re-add execute_sql_mut_tx by @coolreader18 in https://github.com/clockworklabs/SpacetimeDB/pull/1313
• Tables only become public explicitly via #[spacetimedb(table(public))] by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1278
• IndexJoin/JoinInner: store ColId by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1166
• More trace logs for TX locking by @bfops in https://github.com/clockworklabs/SpacetimeDB/pull/1253
• Split ColumnOp into one with row indices and one with FieldName & other enabled changes by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1207
• Flatten ColumnOp, avoiding allocation in the common case by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1234
• Fix commitlog fold_transactions_from ignoring requested offset by @gefjon in https://github.com/clockworklabs/SpacetimeDB/pull/1330
• Jeremie/notify sql by @lcodes in https://github.com/clockworklabs/SpacetimeDB/pull/1198
• Impl Serialize, Deserialize for Page by @gefjon in https://github.com/clockworklabs/SpacetimeDB/pull/1335
• Create new crate fs-utils; move Lockfile and create_parent_dir by @gefjon in https://github.com/clockworklabs/SpacetimeDB/pull/1334
• Make both TX offset counters agree by @gefjon in https://github.com/clockworklabs/SpacetimeDB/pull/1332
• commitlog: Make bitflip test a proptest by @kim in https://github.com/clockworklabs/SpacetimeDB/pull/1333
• Make update_database insensitive to table access changes by @Centril in https://github.com/clockworklabs/SpacetimeDB/pull/1338
• Define DirTrie, a git-like on-disk object store by @gefjon in https://github.com/clockworklabs/SpacetimeDB/pull/1336
• Add the snapshot crate, which implements snapshotting at a low level by @gefjon in https://github.com/clockworklabs/SpacetimeDB/pull/1340
• Fix bug with Lockfile sticking around by @bfops in https://github.com/clockworklabs/SpacetimeDB/pull/1341
• chore: fix typos by @xiaoxianBoy in https://github.com/clockworklabs/SpacetimeDB/pull/1241
• Fix Config.save failing if /tmp is on a different filesystem by @bfops in https://github.com/clockworklabs/SpacetimeDB/pull/1346
• feat(1329): System table for system variables by @joshua-spacetime in https://github.com/clockworklabs/SpacetimeDB/pull/1342
• Update quickstart modules to have public tables by @bfops in https://github.com/clockworklabs/SpacetimeDB/pull/1348
• Shared C# codegen for BSATN by @RReverser in https://github.com/clockworklabs/SpacetimeDB/pull/1312
• Prune bindings deps by @coolreader18 in https://github.com/clockworklabs/SpacetimeDB/pull/1290
• feat: System table based slow query logging by @joshua-spacetime in https://github.com/clockworklabs/SpacetimeDB/pull/1350
• Add Jenkinsfile to run internal automation by @kurtismullins in https://github.com/clockworklabs/SpacetimeDB/pull/1232
• fix(1353): Remove underscore based table access checks by @joshua-spacetime in https://github.com/clockworklabs/SpacetimeDB/pull/1354
• core: Store address, owner and program bytes in st_module by @kim in https://github.com/clockworklabs/SpacetimeDB/pull/1305
• test(1329): Row limit from system table by @joshua-spacetime in https://github.com/clockworklabs/SpacetimeDB/pull/1355
• Add explicit parameter for table visibility by @RReverser in https://github.com/clockworklabs/SpacetimeDB/pull/1359
• Bump version to 0.10.0 by @bfops in https://github.com/clockworklabs/SpacetimeDB/pull/1349
• Fix output of binary, Identity, Address for SQL output and the 'Display' of them to show a full hex value by @mamcx in https://github.com/clockworklabs/SpacetimeDB/pull/1087
• Integrate snapshotting into core by @gefjon in https://github.com/clockworklabs/SpacetimeDB/pull/1344
• core: Determine dangling clients from st_clients by @kim in https://github.com/clockworklabs/SpacetimeDB/pull/1366
• durability: Skip fsync if nothing changed by @kim in https://github.com/clockworklabs/SpacetimeDB/pull/1360
• [C#] Add Roslyn shapshot tests by @RReverser in https://github.com/clockworklabs/SpacetimeDB/pull/1399
• chore: Remove max value metrics by @joshua-spacetime in https://github.com/clockworklabs/SpacetimeDB/pull/1402
• [NFC] [C#] Minor simplifications to type checks in Roslyn codegen by @RReverser in https://github.com/clockworklabs/SpacetimeDB/pull/1400
• Add Option SDK tests by @RReverser in https://github.com/clockworklabs/SpacetimeDB/pull/1405
• [C#] [NFC] Use semantic model's type where possible by @RReverser in https://github.com/clockworklabs/SpacetimeDB/pull/1401
• Fix auth regression by @coolreader18 in https://github.com/clockworklabs/SpacetimeDB/pull/1413

New Contributors

• @lcodes made their first contribution in https://github.com/clockworklabs/SpacetimeDB/pull/1198
• @xiaoxianBoy made their first contribution in https://github.com/clockworklabs/SpacetimeDB/pull/1241

Full Changelog: https://github.com/clockworklabs/SpacetimeDB/compare/v0.9.2-beta...v0.10.0-beta