37 lines
1.2 KiB
Markdown
37 lines
1.2 KiB
Markdown
## Opt-in break to revert from different 4.5 SQL generation to simpler 4.0 SQL generation
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### Scope
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Transparent
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### Version Introduced
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4.5.2
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### Source Analyzer Status
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Not planned
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### Change Description
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Queries that produce JOIN statements and contain a call to a limiting operation without first using OrderBy now produce simpler SQL. After upgrading to .NET Framework 4.5, these queries produced more complicated SQL than previous versions.
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- [ ] Quirked
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- [x] Optional
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- [ ] Build-time break
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### Recommended Action
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This feature is disabled by default. If Entity Framework generates extra JOIN statements that cause performance degradation, you can enable this feature by adding the following entry to the `<appSettings>` section of the application configuration (app.config) file:
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```xml
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<add key="EntityFramework_SimplifyLimitOperations" value="true" />
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```
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### Affected APIs
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* Not detectable via API analysis
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### Category
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Entity Framework
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[More information](https://msdn.microsoft.com/en-us/library/dn720772(v=vs.110).aspx)
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<!-- MSDN lists this as a 'minor'-scope break, but it is 'transparent' here because it is an opt-in break -->
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<!-- breaking change id: 50 -->
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