Add VehiclePreviousLog

2012-12-05 15:10:14 -05:00
parent ab16763c01
commit f00c5295e1
6 changed files with 83 additions and 0 deletions
@@ -0,0 +1,45 @@
+namespace MileageTraker.Web.Migrations
+{
+    using System.Data.Entity.Migrations;
+    
+    public partial class AddVehiclePreviousLog : DbMigration
+    {
+        public override void Up()
+        {
+            AddColumn("Log", "VehiclePreviousLogId", c => c.Int());
+            AddForeignKey("Log", "VehiclePreviousLogId", "Log", "LogId");
+            CreateIndex("Log", "VehiclePreviousLogId");
+	        var populateSql =
+		        @"WITH summary AS (
+					SELECT
+						ROW_NUMBER() OVER (PARTITION BY l.LogId ORDER BY l.LogId ASC, pl.EndOdometer DESC, pl.Created DESC) AS rk,
+						l.LogId, pl.LogId as PreviousLogId
+					FROM
+						[Log] as l,
+						[Log] as pl
+					WHERE
+						pl.VehicleId = l.VehicleId
+						AND ((pl.[Date] <= l.[Date]
+								AND pl.EndOdometer < l.EndOdometer)
+							OR (
+								pl.EndOdometer < l.EndOdometer
+								AND pl.Created < l.Created
+							))
+				)
+				UPDATE [Log]
+				SET [Log].VehiclePreviousLogId = summary.PreviousLogId
+				FROM summary
+				WHERE summary.rk = 1
+				AND [Log].LogId = summary.LogId
+				";
+			Sql(populateSql);
+        }
+        
+        public override void Down()
+        {
+            DropIndex("Log", new[] { "VehiclePreviousLogId" });
+            DropForeignKey("Log", "VehiclePreviousLogId", "Log");
+            DropColumn("Log", "VehiclePreviousLogId");
+        }
+    }
+}