How Can I Determine the Generated SQL Code from an Entity Framework Core IQueryable?

Determining SQL Code Generation from Entity Framework Core IQueryable

In Entity Framework Core, understanding the generated SQL code can be crucial for troubleshooting queries and optimizing performance. This capability was previously provided by the ToTraceString() method in earlier versions of the framework.

EF Core 5/6 (Net 5/6):

In contemporary versions of Entity Framework Core, the ToQueryString() method serves a similar purpose:

var query = _context.Widgets.Where(w => w.IsReal && w.Id == 42);
var sql = query.ToQueryString();

This method provides a string representation of the generated SQL code.

Older Net Core Frameworks:

For versions prior to EF Core 5, an extension method can be employed:

public static string ToSql<TEntity>(this IQueryable<TEntity> query)
{
    // Reflection and internal API access omitted for brevity
    return sql;
}

Notes:

• EF Core 3.1: The ToSql() extension method reveals the SQL code generated for the query.
• Tracking Issue: The inability to retrieve this information natively is tracked by the EF Core team and scheduled for resolution in future releases.

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