/// <summary>Finds the first small data amount then the big data amount.</summary>
private static void FindFirstSmallDataAmountThenBigDataAmount()
{
using (var productInventoryDbContext = new ProductInventoryDbContext())
{
Console.WriteLine("************* Find small amount of Data 2017!******************");
// Command listener to add "Recompile" to the query.
var listener = productInventoryDbContext.GetService <DiagnosticSource>();
(listener as DiagnosticListener).SubscribeWithAdapter(new QueryCommandListener());
var firstDate = new DateTime(2017, 1, 1);
var secondDate = new DateTime(2017, 12, 12);
var queryName = "PlayStation%";
var products2017 = FindData(productInventoryDbContext, queryName, firstDate, secondDate);
Console.WriteLine($"************* Number of found Records: {products2017.Count()} !******************");
//Console.WriteLine("****************** Clear Query Plans! ******************");
//ClearQueryPlans(productInventoryDbContext);
Console.WriteLine("************* Find Big amount of Data 2018!******************");
firstDate = new DateTime(2018, 1, 1);
secondDate = new DateTime(2018, 12, 12);
queryName = "XBox%";
var products2018 = FindData(productInventoryDbContext, queryName, firstDate, secondDate);
Console.WriteLine($"************* Number of found Records: {products2018.Count()} !******************");
}
}
/// <summary>
/// Finds the data.
/// </summary>
/// <param name="productInventoryDbContext">The product inventory database context.</param>
/// <param name="queryName">Name of the query.</param>
/// <param name="firstDate">The first date.</param>
/// <param name="secondDate">The second date.</param>
/// <returns>List of founded Products.</returns>
private static IEnumerable <ProductInventory> FindData(ProductInventoryDbContext productInventoryDbContext, string queryName, DateTime firstDate, DateTime secondDate)
{
return(productInventoryDbContext.ProductInventories
.Where(x => EF.Functions.Like(x.Name, queryName) && x.CreateDate >= firstDate && x.CreateDate <= secondDate)
.OrderByDescending(x => x.CreateDate)
.ToList());
}
/// <summary>Clears the query plans.</summary>
/// <param name="productInventoryDbContext">The product inventory database context.</param>
private static void ClearQueryPlans(ProductInventoryDbContext productInventoryDbContext)
{
var clearQuery =
@"ALTER DATABASE ProductInventoryDatabase SET QUERY_STORE CLEAR;
DECLARE @id int
DECLARE adhoc_queries_cursor CURSOR
FOR
SELECT q.query_id
FROM sys.query_store_query_text AS qt
JOIN sys.query_store_query AS q
ON q.query_text_id = qt.query_text_id
JOIN sys.query_store_plan AS p
ON p.query_id = q.query_id
JOIN sys.query_store_runtime_stats AS rs
ON rs.plan_id = p.plan_id
GROUP BY q.query_id
HAVING SUM(rs.count_executions) < 2
AND MAX(rs.last_execution_time) < DATEADD (hour, -24, GETUTCDATE())
ORDER BY q.query_id ;
OPEN adhoc_queries_cursor ;
FETCH NEXT FROM adhoc_queries_cursor INTO @id;
WHILE @@fetch_status = 0
BEGIN
PRINT @id
EXEC sp_query_store_remove_query @id
FETCH NEXT FROM adhoc_queries_cursor INTO @id
END
CLOSE adhoc_queries_cursor ;
DEALLOCATE adhoc_queries_cursor;
";
productInventoryDbContext.Database.ExecuteSqlCommand(clearQuery);
}
static void Main(string[] args)
{
// Creating the database.
using (var productInventoryDbContext = new ProductInventoryDbContext())
{
productInventoryDbContext.Database.EnsureDeleted();
productInventoryDbContext.Database.EnsureCreated();
// Enable Query Store to Generate the Query Plans!
productInventoryDbContext.Database.ExecuteSqlCommand(
@"ALTER DATABASE ProductInventoryDatabase
SET QUERY_STORE = ON
(
OPERATION_MODE = READ_WRITE
)"
);
}
Console.WriteLine("_________________________ Begin The Tests! _________________________");
FindFirstSmallDataAmountThenBigDataAmount();
Console.WriteLine("_________________________ Next Test! _________________________");
FindFirstBigDataAmountThenSmallDataAmount();
Console.WriteLine("_________________________ Done! _________________________");
}
