Prvni verze

_sql/ef_Vyroba_GenerujRozpadCasu.sql

@@ -0,0 +1,40 @@
+-- ef_Vyroba_GenerujRozpadCasu
+CREATE FUNCTION dbo.ef_Vyroba_GenerujRozpadCasu (
+   @datStart DATETIME=NULL,
+   @numOfDays SMALLINT=3,
+   @stepMinutes SMALLINT=60
+)
+
+/*
+RETURNS TABLE
+AS
+RETURN 
+(
+   WITH Recursive_CTE AS
+   (
+       SELECT dbo.hf_TruncDate(ISNULL(@datStart, GETDATE())) AS TimestampUtc
+        UNION ALL
+       SELECT DATEADD(MINUTE, @stepMinutes, TimestampUtc) 
+         FROM Recursive_CTE
+        WHERE TimestampUtc < DATEADD(ms, -3, dbo.hf_TruncDate(DATEADD(DAY, @numOfDays, DATEADD(DAY, 1, ISNULL(@datStart, GETDATE())))))
+   )
+   SELECT *
+    FROM Recursive_CTE
+)
+*/
+RETURNS @Result TABLE (TimestampUtc DATETIME)
+AS
+BEGIN
+   DECLARE @currentTimestamp DATETIME = dbo.hf_TruncDate(ISNULL(@datStart, GETDATE()));
+   DECLARE @endTimestamp DATETIME = DATEADD(ms, -3, dbo.hf_TruncDate(DATEADD(DAY, @numOfDays, DATEADD(DAY, 1, ISNULL(@datStart, GETDATE())))));
+
+   WHILE @currentTimestamp <= @endTimestamp
+   BEGIN
+       INSERT INTO @Result (TimestampUtc)
+       VALUES (@currentTimestamp);
+
+       SET @currentTimestamp = DATEADD(MINUTE, @stepMinutes, @currentTimestamp);
+   END;
+
+   RETURN;
+END