Thanks to visit codestin.com
Credit goes to github.com

Skip to content

[release/9.0-staging] Fix to #35208 - Query/Perf: don't compile liftable constant resolvers in interpretation mode #35211

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Nov 27, 2024
Merged

[release/9.0-staging] Fix to #35208 - Query/Perf: don't compile liftable constant resolvers in interpretation mode #35211

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 1 addition & 1 deletion src/EFCore.Relational/Query/RelationalLiftableConstantProcessor.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -36,7 +36,7 @@ protected override ConstantExpression InlineConstant(LiftableConstantExpression
if (liftableConstant.ResolverExpression is Expression<Func<RelationalMaterializerLiftableConstantContext, object>>
resolverExpression)
{
var resolver = resolverExpression.Compile(preferInterpretation: true);
var resolver = resolverExpression.Compile(preferInterpretation: UseOldBehavior35208);
var value = resolver(_relationalMaterializerLiftableConstantContext);
return Expression.Constant(value, liftableConstant.Type);
}
Expand Down
5 changes: 4 additions & 1 deletion src/EFCore/Query/LiftableConstantProcessor.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,9 @@ private sealed record LiftedConstant(
private readonly LiftedConstantOptimizer _liftedConstantOptimizer = new();
private ParameterExpression? _contextParameter;

protected static readonly bool UseOldBehavior35208 =
AppContext.TryGetSwitch("Microsoft.EntityFrameworkCore.Issue35208", out var enabled35208) && enabled35208;

/// <summary>
/// Exposes all constants that have been lifted during the last invocation of <see cref="LiftedConstants" />.
/// </summary>
Expand Down Expand Up @@ -198,7 +201,7 @@ protected virtual ConstantExpression InlineConstant(LiftableConstantExpression l
// Make sure there aren't any problematic un-lifted constants within the resolver expression.
_unsupportedConstantChecker.Check(resolverExpression);

var resolver = resolverExpression.Compile(preferInterpretation: true);
var resolver = resolverExpression.Compile(preferInterpretation: UseOldBehavior35208);
var value = resolver(_materializerLiftableConstantContext);

return Expression.Constant(value, liftableConstant.Type);
Expand Down