static void Main(string[] args)
{
var config = new ConfigurationBuilder()
.AddJsonFile("appsettings.json.user", optional: false, reloadOnChange: true)
.Build();
using (var context = new EFCoreContext(config.GetConnectionString(nameof(EFCoreContext))))
{
// Ensure context is initialized.
context.Products.FirstOrDefault();
Console.WriteLine("Database initialized.");
QueryProducts(context);
}
}
private static void QueryProducts(EFCoreContext context)
{
var sw = Stopwatch.StartNew();
// Takes about 30 seconds.
var results = context.Products
.Include(p => p.Properties)
.Where(pd => pd.Properties.Any(prop => prop.Name == "prop-20" &&
prop.Value.StartsWith("Property value 20"))
)
.GroupBy(pd => pd.IsActive == null ? false : pd.IsActive)
.Select(g => new
{
Active = g.Key,
Count = g.Count()
})
.ToList();
Console.WriteLine($"Queried {results.Count} results in: {sw.Elapsed}");
foreach (var result in results)
{
Console.WriteLine($"Active {result.Active?.ToString() ?? "NULL"}: {result.Count}");
}
}
