Technical Articles

Working with re-linq

• Introducing re-linq: a general-purpose LINQ provider infrastructure
• Is re-linq’s transformation model powerful enough?
• Subqueries in "from" clauses
• Flattening Sub-Queries in From Clauses
• Parsing properties as if they were query methods
• How to support “group into” with aggregates
• How to write a LINQ provider - the simple way, Part I
• How to write a LINQ provider - the simple way, Part II
• re-linq|ishing the Pain: Using re-linq to Implement a Powerful LINQ Provider on the Example of NHibernate
• More than a couple of visitors
• VB.NET-specific text comparison in LINQ queries
• How to perform a projection in-memory
• Any, All, and Aggregate
• LINQ: A good Visitor use case (but bad implementation)
• The second problem of Visitors – and a solution
• Translating sub-queries with OrderBy to SQL
• Building tuple expressions
• Support for VB-specific string comparisons in re-linq
• Making it hard to implement language-compatible LINQ providers
• The DefaultIfEmpty LINQ query operator
• How re-linq represents the DefaultIfEmpty query operator
• Handling the DefaultIfEmpty result operator in a re-linq-based provider
• Dealing with sub-queries in a from clause
• Query operators defined by interfaces
• Extensibility: Custom query operators
• Support for SelectMany without result selector
• A lot of new customizability
• Customizability explained
• How to recognize if a method is a query operator?
• Subquery boundaries after GroupBy, Union, and similar operators?

Technical Background

• .NET 4.0 expression trees: Code gen, blocks, and visitors
• .NET 4.0 expression trees: Extension expressions
• Virtual methods outside of classes: The Visitor Pattern
• How a Visitor implementation can handle unknown nodes