[dependabot]

Updated linq2db from 6.2.1 to 6.5.1.

Release notes

Sourced from linq2db's releases.

6.5.1

Highlights of this release:

• ⚠ Operators between columns stored through disagreeing value converters now throw instead of returning wrong results (#​5902)
• ⚠ Projection calculations over the missing side of a LEFT JOIN now use the .NET default of the column's type, matching how the column itself is read (#​5983)
• Nested FromSql / FromSqlScalar / Sql.Expr no longer reuse stale cached SQL; captured FormattableString arguments are now parameters (#​6003)
• Date-difference regressions from 6.5.0 fixed — parameter operands, SQL Server 2005–2014, and date + (end - start) on SQLite, Firebird, Oracle and YDB (#​5987)

Provider-specific highlights:

• ClickHouse — date differences and millisecond date functions over DateTime columns work again (#​5959)

Full release notes

Nugets

New Contributors

• @​Demivan made their first contribution in Remove unused RemapToNewPath helpers linq2db/linq2db#6096

Full Changelog: linq2db/linq2db@v6.5.0...v6.5.1

6.5.0

Highlights of this release:

• ⚠ TimeSpan duration columns — declare the unit an integral column stores with [Duration(…)], and TimeSpan members, arithmetic and comparisons translate to SQL. Date differences now measure elapsed time instead of counting calendar boundaries (#​5750)
• ⚠ Chained TablesInScopeHint calls now stack instead of silently dropping all but the innermost — .WithUpdLockInScope().WithRowLockInScope() emits both hints (#​5850)
• UpdateOptimisticWithRefresh refreshes the concurrency token on your entity after an optimistic update, so the same instance can be reused without re-reading the row (#​5643)
• IInterceptable is public again, so a custom IDataContext can receive interceptors — and a compiled query ending in ToList() / ToArray() now builds (#​5813)
• Table-per-hierarchy query compilation is back to 5.x speed, and no longer overflows the stack on large models (#​5737)
• Deep LoadWith chains and entities with many loaded associations build substantially faster on first execution (#​5774)
• ToListAsync() on a query with LoadWith (or a temp table, or a provider hint) now uses async ADO.NET instead of blocking a thread-pool thread, and Insert / Update / Delete / Merge no longer reject a LoadWith query (#​5809)
• A LoadWith filter closing over an optional value no longer serves the first closure state's results to every later call — a filtered call could return unfiltered rows, or an unfiltered call return nothing (#​5801)
• A custom Sql.Extension builder that reads an argument value no longer bakes it into the cached query — a second query with a different value silently ran the first one's SQL (#​5841)
• A repeated impure expression (counter.Next() twice in one predicate) no longer collapses into a single SQL parameter, which made the second occurrence filter on the first one's value (#​5733)
• joined != null ? joined.X : fallback inside a Union / Concat branch no longer drops its null check — non-matching rows came back as null or 0 instead of the fallback (#​5831)
• A set-operation branch whose projection mixes SQL and non-SQL parts ("p_" + id.ToString("N") inside a Concat) no longer fails the whole query (#​5818)
• Count() over a left join to a grouping with a computed key no longer crashes with "Cannot get field for …" — a paging query that worked for the page failed on the total (#​5802)
• Eager-loading an association off a GroupBy entity key now works — group d by d.Master into g … g.Key.Details.ToList() (#​5727)
• db.GetTable<Base>().Insert(() => new Derived { … }) on an inheritance-mapped table no longer throws "Property 'X' is not defined for type 'Base'" (#​5840)
• Updating through a DTO whose member is typed as a base type of the projected entity no longer fails with "Cannot find target table for UPDATE statement" (#​5766)
• A recursive CTE whose projection computes over its own columns no longer generates SQL the database rejects with a circular-reference error (#​5764)
• Sql.Window functions that reference no column — Sql.Window.Count(w => w) == 3 — now translate instead of throwing ServerSideOnlyException (#​5783)
• Remote contexts no longer leak a client per emulated InsertOrReplace / Upsert — visible on the gRPC and WCF transports, which open a channel per call (#​5762)

Provider-specific highlights:

• SQL Server / SAP HANA / MySQL — a constant ORDER BY inside a window function is no longer emitted verbatim: it errored on SQL Server and SAP HANA, and MySQL 8 read it as an output-column position and ordered by that column (#​5817)
• Oracle — bulk copy can send up to 6x fewer statements (64 KB → 384 KB SQL length limit), and BulkCopyOptions.MaxSqlLengthForBatch makes that limit configurable on any provider (#​5828)
• EF Core — one DbContext type used against two providers in the same process no longer shares a single mapping schema, which gave the second provider the first one's column names and types (#​5780); and two servers of the same family in one process no longer share one cached provider when the context is configured with a DbDataSource or an external DbConnection (#​5808)

linq2db.FSharp:

• Join and Where predicates that capture an outer range variable now translate, and chained groupJoin … DefaultIfEmpty() emits real LEFT JOINs instead of dropping unmatched rows (#​5701)

LINQPad driver:

• macOS support on LINQPad 9, and database clients are provisioned per connection instead of all being installed with the driver — the driver also loads on LINQPad 8/9 without requiring the .NET 10 runtime (#​5786)

Packaging:

• Packages that carry a third-party binary — the T4 provider packages, linq2db.cli and the LINQPad 5 .lpx — now ship a THIRD-PARTY-NOTICES.txt (#​5863)

Full release notes

Nugets

New Contributors

• @​vggog made their first contribution in Fix alignment in PostgreSQLFactory switch cases. linq2db/linq2db#5855

Full Changelog: linq2db/linq2db@v6.4.0...v6.5.0

6.4.0

Highlights of this release:

• New Sql.Window.* fluent API for window functions — ranking, offset, value, aggregate, statistical, regression, ordered-set and distribution functions, full ROWS/RANGE/GROUPS frames, named windows, FILTER, NULLS FIRST/LAST and Oracle KEEP, with compile-time safety. Existing Sql.Ext.*().Over() queries keep working unchanged — they run on the new pipeline internally (#​5468)
• Two new eager-loading strategies for LoadWith / ThenLoad and inline collection projections: KeyedQuery (buffers the parent query and loads children with WHERE key IN (…)) and CteUnion (collapses same-level collections into one UNION ALL CTE). Selectable per query or globally, with automatic fallback (#​5450)
• Named (keyed) query filters — HasQueryFilter(key, …) and selective IgnoreFilters(keys), mirroring the EF Core 10 API, including EF Core keyed-filter flow-through (#​5525)
• Fluent Upsert plus entity-based Insert(item, …) / Update(item, …) DML APIs (#​5482)
• linq2db.Analyzers — a new analyzer package shipped as a dependency of linq2db, with rule L2DB1001 and a code fix that migrates the legacy Sql.Ext window API to Sql.Window. Opt out with EnableLinqToDBAnalyzers (#​5703)
• Query cache is now bounded with idle eviction and a global cap, preventing unbounded growth in long-running apps with many distinct queries (#​5501)
• NULLS FIRST / NULLS LAST control on OrderBy / ThenBy with a DataOptions default, rendered natively or emulated across all providers (#​5561)
• Sql.NewGuid7() and Guid.CreateVersion7() mapping for UUIDv7 generation (#​5648)
• Automatic mapping of F# 'T option / 'T voption columns after .UseFSharp(), with none stored as NULL (#​5624)
• New opt-in PreferClientCalculation evaluates non-server-required projection expressions client-side, restoring v5 projection behavior (#​5604)
• DistinctBy emits native DISTINCT ON on PostgreSQL and DuckDB (#​5630)
• OptimizeForSequentialAccess became a per-context option, fixing query-cache collisions between sequential and non-sequential reader plans (#​5639)
• Raw-SQL materialization into records and constructor types now honors [Column] and [ValueConverter], binding by mapped column name rather than parameter name (#​5659)
• Provider auto-detection works under PublishSingleFile self-contained deployments (#​5489)
• Fixed corrupted SQL — swapped or duplicated aliases and column names — when one cached parameter-dependent query executed concurrently on multiple threads (#​5657)
• Two connection leaks fixed: provider version auto-detection left caller-supplied connections open (#​5691), as did the implicit EF Core ToLinqToDB() / ToLinqToDBTable() / GetTable<T>() helpers (#​5378)
• Other notable fixes: recursive CTE dropping columns on an object-typed projection member (#​5680), InvalidCastException on a local-collection LEFT JOIN feeding decimal arithmetic (#​5587), invalid SQL when subtracting two DateTime/DateTimeOffset columns (#​5581), [ExpressionMethod] running at materialization with IsColumn = false (#​5578), nested member-path mappings throwing in MERGE setters and discriminators (#​5545), InvalidCastException on Contains in a correlated subquery (#​5558), aggregates over a captured local collection turned into SQL subqueries (#​5557), and ORDER BY expressions lifted from a subquery producing invalid SQL (#​5556)

Provider-specific highlights:

• YDB — now a fully supported provider rather than experimental: schema API, CLI scaffolding, LINQPad driver and broad translation coverage (#​5564)
• PostgreSQL — v19 dialect with correct IGNORE NULLS / RESPECT NULLS window SQL (#​5644); v11 and v12 dialects, with unsupported window features rejected client-side with a clear exception (#​5687)
• SQL Server — new [GetSqlDecimal] attribute reads decimal columns whose precision exceeds the CLR decimal range instead of throwing (#​5605)
• Oracle / Informix — fixed cached queries producing wrong SQL on re-execution when a provider rewrite modified the cached statement in place (#​5723)
• EF Core — many-to-many (skip navigation) associations now translate to SQL (#​5588); the linq2db query cache no longer misses on every DbContext with pooled contexts or disabled service-provider caching (#​5695)
• Native AOT — fixed a crash triggered by lambda closures in queries (#​5552); EF Core on Mono / Android AOT — fixed a fatal crash reading model metadata (#​5546)
• LINQPad — the driver installs again on macOS and Linux from LINQPad's NuGet package manager, broken since 6.2.0 (#​5571)

linq2db.cli:

• New query, execute and schema commands, plus an MCP server for agent-driven database access (#​5678)

Full release notes

Nugets

New Contributors

• @​myieye made their first contribution in Fix SqlTransparentExpression cctor reflecting for wrong ctor signature linq2db/linq2db#5546

Full Changelog: linq2db/linq2db@v6.3.0...v6.4.0

6.3.0

Highlights of this release:

• Enum.HasFlag translation
• string.Concat / string.Join / TrimStart / TrimEnd translation improvements (with many translator-bug fixes uncovered along the way)
• AsCte builder overload for explicit CTE materialization configuration (PostgreSQL, ClickHouse, DuckDB, SQLite, DuckDB)
• AsQueryable(db, ...) overload with per-column parameterization control for VALUES clauses
• Improved Now / UtcNow translation with timezone awareness across providers; providers without TZ gracefully downgrade
• IgnoreConflicts option for MultipleRows mode BulkCopy on MySql / MariaDB / PostgreSQL / SQLite / DuckDB (thanks @​darko1979)
• Many other fixes: PostgreSQL array-parameter query cache misses, SqlQueryDependentParams issues, association discovery on interfaces, subquery null-aggregate SQL generation, UPDATE FROM regressions, ValueConverter null handling, CTE column removal, set-operator flattening, Sql.Row converters, predicate null-check optimization, FromSql caching, DropTable(throwExceptionIfNotExists: false) behavior, EXISTS over set queries

Provider-specific highlights:

• DuckDB — brand-new first-class provider (thanks @​stdray, #​5451), schema introspection, scaffolding via linq2db.cli, LINQPad support
• Oracle — COALESCE parameter type inference, DateTimeOffset.Now no longer corrupts TIMESTAMP WITH TIME ZONE writes, drop of global temp tables with data now works
• SQL Server 2025 — vector type fixes
• SQL Server + Firebird — date conversion fix for DbType="..." mappings
• ClickHouse — table-hint whitespace fix
• Access — non-EN locale compatibility re-fixes
• SAP HANA + DB2 + Firebird — proper SQL escaping in EXECUTE blocks for create/drop tables
• SAP HANA — DROP TABLE IF NOT EXISTS handled on SQL level
• EF.Core / SQL Server — UseSequence-defined fields now detected as identity (#​5439)
• F# support — compatibility with FSharp.Core 10.1.x; record mapping fixes for case-only-distinct member names

linq2db.cli:

• Per-RID tool packaging. linq2db.cli now ships as per-RID tool packages (win-x64/win-x86/win-arm64/linux-x64/linux-arm64/osx-arm64/osx-x64). dotnet tool install -g linq2db.cli auto-picks the variant for your SDK; add --arch x86 when you need 32-bit (Jet OLE DB; or to match a 32-bit ACE / SqlCe / SAP HANA driver).
• Breaking: --architecture scaffold option removed — bitness is now fixed at install time. Jet connection strings on a 64-bit process now fail fast with a clear x86-variant hint. See #​5539.

Full release notes

Nugets

What's Changed

• Release 6.2.1 by @​MaceWindu in Release 6.2.1 linq2db/linq2db#5426
• Fix compatibility with FSharp.Core 10.1.x by @​MaceWindu in Fix compatibility with FSharp.Core 10.1.x linq2db/linq2db#5430
• Fixed a StackOverflowException when using chained AsQueryable() calls. by @​sdanyliv in Fixed a StackOverflowException when using chained AsQueryable() calls. linq2db/linq2db#5433
• IgnoreConflicts option in BulkCopyOptions for MySql/MariaDB, PostgreSQL and SQLite by @​darko1979 in IgnoreConflicts option in BulkCopyOptions for MySql/MariaDB, PostgreSQL and SQLite linq2db/linq2db#5395
• Relaxed restriction for Sql.Row and fields with conversion. by @​sdanyliv in Relaxed restriction for Sql.Row and fields with conversion. linq2db/linq2db#5438
• Add JetBrains support section to README by @​sdanyliv in Add JetBrains support section to README linq2db/linq2db#5448
• Initial setup for Claude code by @​MaceWindu in Initial setup for Claude code linq2db/linq2db#5452
• Wrapped key in LINQ Query by @​sdanyliv in Wrapped key in LINQ Query linq2db/linq2db#5456
• Disabled Clickhouse.Octonica provider tests. by @​sdanyliv in Disabled Clickhouse.Octonica provider tests. linq2db/linq2db#5460
• Fix null checks optimization for parameterized predicates (#​5445) by @​sdanyliv in Fix null checks optimization for parameterized predicates (#5445) linq2db/linq2db#5464
• Fix CTE columns incorrectly removed by optimizer by @​sdanyliv in Fix CTE columns incorrectly removed by optimizer linq2db/linq2db#5462
• Fix WHERE clause lost during nested UNION ALL flattening by @​sdanyliv in Fix WHERE clause lost during nested UNION ALL flattening linq2db/linq2db#5465
• Fix UnionAll + string member access (.Length, IsNullOrEmpty) by @​jogibear9988 in Fix UnionAll + string member access (.Length, IsNullOrEmpty) linq2db/linq2db#5459
• Fix PostgreSQL array parameter query cache misses by @​sdanyliv in Fix PostgreSQL array parameter query cache misses linq2db/linq2db#5470
• Fix type construction (post-merge quic fix) by @​MaceWindu in Fix type construction (post-merge quic fix) linq2db/linq2db#5471
• Bump versions for 6.3.0 release by @​MaceWindu in Bump versions for 6.3.0 release linq2db/linq2db#5474
• Fix build issues by @​viceroypenguin in Fix build issues linq2db/linq2db#5472
  ... (truncated)

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