Working on "Join Game" feature.

Shogi.Database/Session/Stored Procedures/SetPlayer2.sql

@@ -0,0 +1,16 @@
+CREATE PROCEDURE [session].[SetPlayer2]
+	@SessionName [session].[SessionName],
+	@Player2Name [user].[UserName] NULL
+AS
+BEGIN
+	SET NOCOUNT ON;
+
+	DECLARE @player2Id BIGINT;
+	SELECT @player2Id = Id FROM [user].[User] WHERE [Name] = @Player2Name;
+
+	UPDATE sess
+	SET Player2Id = @player2Id
+	FROM [session].[Session] sess
+	WHERE sess.[Name] = @SessionName;
+
+END

Shogi.Database/Session/Stored Procedures/UpdateSession.sql

@@ -1,14 +0,0 @@
-CREATE PROCEDURE [dbo].[UpdateSession]
-	@SessionName [session].[SessionName],
-	@BoardStateJson [session].[JsonDocument]
-AS
-BEGIN
-	SET NOCOUNT ON;
-
-	UPDATE bs
-	SET bs.Document = @BoardStateJson
-	FROM [session].[BoardState] bs
-		INNER JOIN [session].[Session] s on s.Id = bs.SessionId
-	WHERE s.Name = @SessionName;
-
-END