[Investigate] InvalidOperationException from predicate parser

@MaceWindu thank you for the quick response. When you say linq syntax, do you mean query expression syntax?

We have a case where (1) we are using the standard linq methods (no query syntax) and (2) the fields in the anonymous records are alphabetical.

We are getting the following error:

Stack trace:

>    at LinqToDB.Linq.Builder.ExpressionBuilder.ConvertToSql(IBuildContext context, Expression expression, Boolean unwrap, ColumnDescriptor columnDescriptor, Boolean isPureExpression)
   at LinqToDB.Linq.Builder.ExpressionBuilder.ConvertToExtensionSql(IBuildContext context, Expression expression, ColumnDescriptor columnDescriptor)
   at LinqToDB.EntityFrameworkCore.Internal.EFCoreExpressionAttribute.<>c__1`1.<GetExpression>b__1_1(ValueTuple`4 ctx, String v, String d)
   at LinqToDB.Sql.ExpressionAttribute.<>c__DisplayClass68_0`1.<ResolveExpressionValues>b__0(Match match)
   at System.Text.RegularExpressions.Regex.<>c.<Replace>b__84_0(ValueTuple`5& state, Match match)
   at System.Text.RegularExpressions.RegexRunner.Scan[TState](Regex regex, String text, Int32 textstart, TState& state, MatchCallback`1 callback, Boolean reuseMatchObject, TimeSpan timeout)
   at System.Text.RegularExpressions.Regex.Run[TState](String input, Int32 startat, TState& state, MatchCallback`1 callback, Boolean reuseMatchObject)
   at System.Text.RegularExpressions.Regex.Replace(MatchEvaluator evaluator, Regex regex, String input, Int32 count, Int32 startat)
   at System.Text.RegularExpressions.Regex.Replace(String input, MatchEvaluator evaluator)
   at LinqToDB.Sql.ExpressionAttribute.ResolveExpressionValues[TContext](TContext context, String expression, Func`4 valueProvider)
   at LinqToDB.EntityFrameworkCore.Internal.EFCoreExpressionAttribute.GetExpression[TContext](TContext context, IDataContext dataContext, SelectQuery query, Expression expression, Func`4 converter)
   at LinqToDB.Linq.Builder.ExpressionBuilder.ConvertToSql(IBuildContext context, Expression expression, Boolean unwrap, ColumnDescriptor columnDescriptor, Boolean isPureExpression)
   at LinqToDB.Linq.Builder.ExpressionBuilder.ConvertToExtensionSql(IBuildContext context, Expression expression, ColumnDescriptor columnDescriptor)
   at LinqToDB.EntityFrameworkCore.Internal.EFCoreExpressionAttribute.<>c__1`1.<GetExpression>b__1_1(ValueTuple`4 ctx, String v, String d)
   at LinqToDB.Sql.ExpressionAttribute.<>c__DisplayClass68_0`1.<ResolveExpressionValues>b__0(Match match)
   at System.Text.RegularExpressions.Regex.<>c.<Replace>b__84_0(ValueTuple`5& state, Match match)
   at System.Text.RegularExpressions.RegexRunner.Scan[TState](Regex regex, String text, Int32 textstart, TState& state, MatchCallback`1 callback, Boolean reuseMatchObject, TimeSpan timeout)
   at System.Text.RegularExpressions.Regex.Run[TState](String input, Int32 startat, TState& state, MatchCallback`1 callback, Boolean reuseMatchObject)
   at System.Text.RegularExpressions.Regex.Replace(MatchEvaluator evaluator, Regex regex, String input, Int32 count, Int32 startat)
   at System.Text.RegularExpressions.Regex.Replace(String input, MatchEvaluator evaluator)
   at LinqToDB.Sql.ExpressionAttribute.ResolveExpressionValues[TContext](TContext context, String expression, Func`4 valueProvider)
   at LinqToDB.EntityFrameworkCore.Internal.EFCoreExpressionAttribute.GetExpression[TContext](TContext context, IDataContext dataContext, SelectQuery query, Expression expression, Func`4 converter)
   at LinqToDB.Linq.Builder.ExpressionBuilder.ConvertToSql(IBuildContext context, Expression expression, Boolean unwrap, ColumnDescriptor columnDescriptor, Boolean isPureExpression)
   at LinqToDB.Linq.Builder.ExpressionBuilder.SuggestColumnDescriptor(IBuildContext context, Expression expr)
   at LinqToDB.Linq.Builder.ExpressionBuilder.ConvertCompare(IBuildContext context, ExpressionType nodeType, Expression left, Expression right)
   at LinqToDB.Linq.Builder.ExpressionBuilder.ConvertPredicate(IBuildContext context, Expression expression)
   at LinqToDB.Linq.Builder.ExpressionBuilder.BuildSearchCondition(IBuildContext context, Expression expression, List`1 conditions)
   at LinqToDB.Linq.Builder.AllJoinsLinqBuilder.BuildMethodCall(ExpressionBuilder builder, MethodCallExpression methodCall, BuildInfo buildInfo)
   at LinqToDB.Linq.Builder.ExpressionBuilder.BuildSequence(BuildInfo buildInfo)
   at LinqToDB.Linq.Builder.ExpressionBuilder.Build[T]()
   at LinqToDB.Linq.Query`1.CreateQuery(ExpressionTreeOptimizationContext optimizationContext, ParametersContext parametersContext, IDataContext dataContext, Expression expr)
   at LinqToDB.Linq.Query`1.GetQuery(IDataContext dataContext, Expression& expr, Boolean& dependsOnParameters)
   at LinqToDB.Linq.ExpressionQuery`1.get_SqlText()
   at Database.RepositoryExtra.getAdiLinqQuery(AdiId id) in C:\Work\Clients\Asbest Consulting\asbest-consulting\app\serverTests\RepositoryExtra.fs:line 51
   at [e-mail](Unit unitVar) in C:\Work\Clients\Asbest Consulting\asbest-consulting\app\serverTests\Program.fs:line 21
   at [e-mail](Unit unitVar)
   at Microsoft.FSharp.Control.AsyncPrimitives.CallThenInvoke[T,TResult](AsyncActivation`1 ctxt, TResult result1, FSharpFunc`2 part2)
   at Microsoft.FSharp.Control.Trampoline.Execute(FSharpFunc`2 firstAction)

Note that we are using linq2db together with EF Core (https://github.com/linq2db/linq2db.EntityFrameworkCore).

_Originally posted by @jannesiera in https://github.com/linq2db/linq2db/issues/1813#issuecomment-1228304979_

[MaceWindu]

We will ship workaround in linq2db.EntityFrameworkCore (this or next week). Regarding better F# support in general - I plan to look at it, but it will not happen earlier than October

[MaceWindu]

linq2db.EntityFrameworkCore with fix released