需要帮助将此转换为MySql存储过程

Question

我试图创建与winform应用相同的登录功能，以从MySql服务器检查登录详细信息，就像它与MsSql Server进行检查一样。我试图将此MsSql存储过程转换为MySql存储过程，但我无法这样做。有谁可以帮忙吗？

     PROCEDURE [dbo].[CheckAccessDetails]
(
        @IsUsernameCorrect BIT OUTPUT
        ,@IsPasswordCorrect BIT OUTPUT
        ,@UserAccessActive BIT OUTPUT
        ,@Username NVARCHAR (50)
        ,@Password NVARCHAR (50)
)
AS
    BEGIN
    SET @IsUsernameCorrect = 0
    SET @IsPasswordCorrect = 0
    SET @UserAccessActive = 0

    IF EXISTS (SELECT * FROM [dbo].[MMAUsers] WHERE [UserName] = @Username AND [Password] = @Password AND [IsAccessActive] = 1)
    BEGIN
    SET @IsUsernameCorrect = 1
    SET @IsPasswordCorrect = 1
    SET @UserAccessActive = 1
    END
    ELSE
    BEGIN
    IF EXISTS (SELECT * FROM [dbo].[MMAUsers] WHERE [UserName] = @Username AND [Password] = @Password)
    BEGIN
    SET @IsUsernameCorrect = 1
    SET @IsPasswordCorrect = 1
    END
    ELSE
    BEGIN
    IF EXISTS (SELECT * FROM [dbo].[MMAUsers] WHERE [UserName] = @Username)
    BEGIN
    SET @IsUsernameCorrect = 1
    END
END
END
END