Practical Query Tagging in EF Core

Practical Query Tagging in EF Core

It’s introduced in EF Core 2.2. This feature helps correlate LINQ queries in code with generated SQL queries captured in logs. You annotate a LINQ query using the new TagWith() method.

What is query tags in EF Core?

It’s introduced in EF Core 2.2. This feature helps correlate LINQ queries in code with generated SQL queries captured in logs. You annotate a LINQ query using the new `TagWith()_` method._

var publishedBlogPosts = dbContext.BlogPosts
    .Where(b => b.PublishedAt != null)
    .TagWith("Getting published blog posts")
    .ToList();

When EF generates the SQL with TagWith method, it also includes the tag as a comment in the query; as a result, debugging and profiling queries might be easier.

-- Getting published blog posts

SELECT [b].[BlogPostId], [b].[Content], [b].[PublishedAt], [b].[Title]
      FROM [BlogPosts] AS [b]
      WHERE [b].[PublishedAt] IS NOT NULL

c-sharp-programming dotnet-core entity-framework-core dotnet query c++

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