[main] Main assembly is built for .Net Core 3.1 only

[main] CollectionExtensions renamed to CollectionExtensionsEx to prevent ambiguity

[main] Removed EnumerableExtensions.ToHashset() as it conflicts with .net core equivalent

[main] Removed EnumerableExtensions.Zip() as it conflicts with .net core equivalent

[main] Removed obsolete EnumerableExtensions.AsAsyncTask() extensions

[main] EnumerableExtensions.AsAsync() extension marked obsolete

[main] EnumerableExtensions.AddOne() extension marked obsolete

[main] Removed ParameterContextExtensions class

[main] Removed SessionEventAccessor.EntitySetChanging event since there is no nofications for it

[main] Removed obsolete Xtensive.Sql.Model.Extractor.ExtractSchema() method

[main] Removed ParameterScope class

[main] Removed Delayed<T>, DelayedQueryResult<T> types. DelayedQuery, DelayedQuery<T> and DelayedScalarQuery<T> introduced instead

[main] Removed both Orm.Providers.EnumerationScope and Orm.Rse.Providers.EnumerationScope

[main] Rse.Providers.EnumerationContext is no longer inherits Context<Rse.Providers.EnumerationScope>

[main] Query.ExecuteFuture()/ExecuteFutureScalar() methods renamed with CreateDelayedQuery() to reflect action they do

[main] QueryEndpoint.ExecuteDelayed() methods renamed with CreateDelayedQuery() to reflect action they do

[main] Query.Execute() and QueryEndpoint.Execute() changes behavior and actually execute query and holds DbReader opened

[main] Method Xtensive.Sql.Model.Extractor.ExtractSchemes() became abstract

[main] ParameterContext class no longer inherits Context<ParameteScope> and its usage rewoked heavily

[main] Parameter and Parameter<T> are light-weight and no longer provide value

[main] Now all CommandFactory.CreateQueryPart() methods require ParameterContext instance

[main] ContainsTableProvider.SearchCriteria and ContainsTableProvider.TopN have ParameterContext as parameter

[main] FreeTextProvider.SearchCriteria and FreeTextProvider.TopN properties have ParameterContext as parameter

[main] IncludeProvider.FilterDataSource property has ParameterContext as parameter

[main] PagingProvider has ParameterContext as parameter in From, To, Skip and Take properties

[main] RawProvider.Source and RawProvider.CompiledSource properties have ParameterContext as parameter

[main] SeekProvider.Key property has ParameterContext as parameter

[main] SkipProvider.Count property has ParameterContext as parameter

[main] TakeProvider.Count property has ParameterContext as parameter

[main] RecordSet class is renamed with RecordSetReader

[main] ExecutableProvider is no longer implements IEnumerable<Tuple>

[main] Providers.QueryParameterBinding.ValueAccessor property changes retun value

[main] Services.QueryParameterBinding.ValueAccessor property changes retun value

[main] Introduced Domain.BuildAsync() and asynchronous IUpgradeHandler and UpgradeHandler upgrade method-steps

[main] Introduced StorageNodeManager.AddNodeAsync()

[main] Introduced asynchronous persist of changes, including manual and autosavings before query and transaction commit

[main] Added dedicated Prefetch extensions for DelayedQuery<T> and QueryResult<T> types

[main] Query.Execute() methods return new type QueryResult<T> which is compatible with old return type

[main] QueryEndpoint.Execute() methods return new type QueryResult<T> which is compatible with old return type

[main] DelayedQuery created by any of CreateDelayedQuery() methods can be natively executed asynchronowsly or synchronously

[main] SessionScope is no longer inheritor of Scope<T>. Functionally it stays the same

[main] Prefetch extensions return new type PrefetchQuery<T> which is compatible with old one return type

[main] Domain, Session and TransactionScope are IAsyncDisposable implementors now

[main] Introduced DataReader struct which is both synchronous and asynchronous enumerator

[main] Both async and regular CommandProcessor.ExecuteTasksWithReader methods changed return type to DataReader

[main] Both async and regular IProviderExecutor.ExecuteTupleReader methods now return DataReader type

[main] Both async and sync ExecutableProvider.OnEnumerate methods return DataReader

[main] Introduced asynchronous equivalents for low-level APIs such as SqlDriverFactory, SqlDriver, Extractor, SqlConnection

[main] Xtensive.Sql.SqlConnection implements IAsyncDisposable interface now

[main] Xtensive.Collections.SetBase<TItem> class implements IReadOnlyCollection<> interface now

[main] Added DisposableExtensions.DisposeSafelyAsync() methods

[main] DisposableSet class implements IAsyncDisposable interface now

[main] Queryable<T> class now implements IAsyncEnumerable<T> interface

[main] Command became an IAsyncDisposable implementor

[main] ISqlExecutor now have async analogues for methods

[main] Prefetching of fields as part of asynchronous query executes asyncronously as well

[main] Introduced asynchronous analogs for transaction operations in SessionHandlers

[main] QueryCommand now supports asynchronous operations and implements both IDisposable and IAsyncDisposable

[main] CommandProcessorContext became an IAsyncDisposable implementor

[main] SessionBound inheritors now check that session hasn't been disposed

[main] Improved perfomance of query translation

[main] Improved memory usage while certain upgrade oprations

[main] No actions for transaction on TransactioScope disposal for zombied transaction

[sqlserver] MS SQL Server provider is built for .Net Core 3.1 only

[firebird] Firebird provider is built for .Net Core 3.1 only

[mysql] MySQL provider is built for .Net Core 3.1 only

[postgresql] PosgreSQL provider is built for .Net Core 3.1 only

[postgresql] Implemented provider for PosgreSQL 12

[oracle] Main assembly is built for .Net Core 3.1 only

[sqlite] Main assembly is built for .Net Core 3.1 only

[bulkoperations] Bulk operations extension is built for .Net Core 3.1 only

[bulkoperations] Asynchronous operations is now supported

[localization] Localization extension is built for .Net Core 3.1 only

[localization] Support for inherited from abstract class localization fields #102

[logging.log4ne] log4net integration extension is built for .Net Core 3.1 only

[logging.nlog] Nlog integration extension is built for .Net Core 3.1 only

[reprocessing] Reprocessing extension is built for .Net Core 3.1 only

[security] Security extension is built for .Net Core 3.1 only

[tracking] Tracking extension is built for .Net Core 3.1 only

[web] Web extension is built for .Net Core 3.1 only

[main] Fixed issue of actual NULL constant being treated as a caching value

[main] Fixed rare case of infinite loop on batching commands

[main] Improved VS compatibility by not processing design-time builds

[main] Introduced IDbConnectionAccessor that gives access to certain stages of connection opening

main Fixed rare cases of writing data in wrong column for SingleTable hierarchies

main Fixed incorrect EntitySetState.TotalItemCount calculation for ClientProfile

sqlserver Fixed incorrect translation of DateTimeOffset.Date part extraction

main Fixed comparison of Keys

mysql Provider is no longer used recursive syntax for join

main Fixed invalid key comparison under certain conditions

main Fixed EntitySet caching invalid state within DisableSaveChanges() scope

main Fixed overflow when storing large TimeSpan values

main Fixed invalid default values for SessionConfiguration.DefaultIsolationLevel and SessionConfiguration.Options

main Fixed support for referencing connection strings in SessionConfiguration

mysql Fixed translation of bitwise operations

mysql Fixed translation of DateTime.DayOfWeek and DateTime.DayOfYear