MySql Declaration and Use of Select Variables - mysql

Question

I'm struggling to write a query in the correct way. Although it does work I'm given the error:
A new statement was found but no delimiter between it and the previous one (near select)
Obviously I can still work with this error but #1. I don't particularly like 'hacky' methods of coping and #2. It's causing problems in php further down the line trying to run the query.
From Google Research it suggests that the error may be a bug however I'm dubious to believe this.
What I'm Actually Trying To Do :
I have 3 Tables:
Table P [Process_ID+, Process_Name, Risk_ID*]
Table V [Validation_ID, Process_ID+, Validation_Date]
Table R [Risk_ID*, Risk_TimePeriod]
The plan is to:
Select Process Details
Join Validation Details
Join Risk Details
Generate a "Due_Date" Based on Validation_Date and Risk_TimePeriod (i.e. If Time Period is 150 then Add 150 Days to Validation_Date).
Something like the below:
Process_ID | Process_Name | Validation_Date | Due_Date | Due_Days | Risk_Level
1 My_Process 2017-02-17 2017-07-17 -150 High
So here; the Due_Date has been created by adding 150 (Risk_Level) to the Validation Date.
Current Query
Set #TimePeriod =
(Select r.Risk_TimePeriod
from processes_active p
inner join processes_risk_config r
on r.Risk_ID = p.Process_Risk
where p.Process_ID = 2);
Select p.Process_ID,
p.Process_Name,
v.Validation_Date,
Date_Add(v.Validation_Date, interval #TimePeriod Day) as Due_Date,
Datediff(Now(), Date_Add(v.Validation_Date, interval #TimePeriod Day)) as Due_Days,
r.Risk_Level
From processes_active p
left JOIN processes_validations v
on p.Process_ID = v.Validation_Process_ID
inner join processes_risk_config r
on r.Risk_ID = p.Process_Risk
Where p.Process_ID = 2
Order By v.Validation_Date Desc
My First "Select" clause is highlighted red. This is where the error message appears. If anyone can point me as to where I've gone wrong that would be greatly appreciated! Thanks

Answer 1

Turns out I was over-complicating this completely!
New Working Query :
Select
p.Process_ID,
p.Process_Name,
v.Validation_Date,
r.Risk_TimePeriod,
Date_Add(v.Validation_Date, interval r.Risk_TimePeriod Day) as Due_Date,
Datediff(Now(), Date_Add(v.Validation_Date, interval r.Risk_TimePeriod Day)) as Due_Days,
r.Risk_Level
From pdc_processes.processes_active p
left JOIN pdc_processes.processes_validations v
on p.Process_ID = v.Validation_Process_ID
inner join processes_risk_config r
on r.Risk_ID = p.Process_Risk
Where p.Process_ID = 2
Order By v.Validation_Date Desc