SUM=90

BATCH JOB

WITH ct AS
(
SELECT
id = cid,
total = SUM(value)
FROM orders
WHERE date > …
GROUP BY cid
)
UPDATE c
SET c.Discount = 10
FROM customers AS c
INNER JOIN ct
ON c.id = ct.id
WHERE ct.total > …;
USE tempdb;
GO
DECLARE @x TABLE (ID int,
Value int);
DECLARE @y TABLE (ID int,
Value int);
INSERT @x VALUES (1, 10), (2,
20);
INSERT @y VALUES (1, 100),(2,
200);
WITH cte AS (SELECT * FROM
@x)
UPDATE cte -- cte is not
referenced by the alias.
SET Value = y.Value
FROM cte AS x -- cte is
assigned an alias.
INNER JOIN @y AS y ON y.ID =
x.ID;
SELECT * FROM @x;
GO
USE tempdb;
GO
-- UPDATE statement with CTE references
that are correctly matched.
DECLARE @x TABLE (ID int, Value int);
DECLARE @y TABLE (ID int, Value int);
INSERT @x VALUES (1, 10), (2, 20);
INSERT @y VALUES (1, 100),(2, 200);
WITH cte AS (SELECT * FROM @x)
UPDATE x -- cte is referenced by the
alias.
SET Value = y.Value
FROM cte AS x -- cte is assigned an
alias.
INNER JOIN @y AS y ON y.ID = x.ID;
SELECT * FROM @x;
GO
USE AdventureWorks2012;
GO
IF OBJECT_ID ('dbo.Table1', 'U') IS NOT NULL
DROP TABLE dbo.Table1;
GO
IF OBJECT_ID ('dbo.Table2', 'U') IS NOT NULL
DROP TABLE dbo.Table2;
GO
CREATE TABLE dbo.Table1
(c1 int PRIMARY KEY NOT NULL, c2 int NOT NULL);
GO
CREATE TABLE dbo.Table2
(d1 int PRIMARY KEY NOT NULL, d2 int NOT NULL);
GO
INSERT INTO dbo.Table1 VALUES (1, 10);
INSERT INTO dbo.Table2 VALUES (1, 20), (2, 30);
GO
DECLARE abc CURSOR LOCAL FOR
SELECT c1, c2
FROM dbo.Table1;
OPEN abc;

1 week
Sum(o => o.Total)
t

+= o1.Total
-= o1.Total
1 week
+= o2.Total
-= o2.Total
1 week
+= o3.Total
-= o3.Total
1 week
WeekTotal WeekTotal
t

SAGA
docs.particular.net/nservicebus/sagas/

+= o1.Total
-= o1.Total
1 week
+= o2.Total
-= o2.Total
1 week
+= o3.Total
-= o3.Total
1 week
WeekTotal WeekTotal
t

SHOW ME THE CODE

DB
BUS
SAGA
class Discounting :
Saga<Discounting.Data>
{
public async Task Handle(
SubmitOrder order)
{
...
}
...
}
Persist
er
dispatch message
queue
request timeout
persist timeout
delay
persist saga
poll

AMAZON SQS
600 s
900
2,800 s
100 s
900
900
(1,900)
(1,000)
(100)

RABBITMQ
600 s
900 s
1,500 s
2,800 s

RABBITMQ

RABBITMQ
42 seconds
1010102 seconds
4210 seconds

RABBITMQ
1
1
0
0
1
0
32 s
16 s
8 s
4 s
2 s
1 s
(4210)

RABBITMQ
28 queues
228 seconds
268,435,456 seconds
8.5 years

WT=90

DB
queue
BUS
SAGA
class OrderProcessPolicy : Saga<OrderProcess>
{
public async Task Handle(SubmitOrder order)
{
// ...
}
public async Task Handle(Cancel
{
// ..
}
public async Task Timeout(BuyersRemorse state)
{
// ...
}
}
Persi
ster
create saga
dispatch message
send messages
persist saga
BUS
SAGA
class OrderProcessPolicy : Saga<OrderProcess>
{
public async Task Handle(SubmitOrder order)
{
// ...
}
public async Task Handle(Cancel
{
// ..
}
public async Task Timeout(BuyersRemorse state)
{
// ...
}
}
Persi
ster
create saga
dispatch message
send messages
persist saga
persist saga
CustomerId = 1337
persist saga
CustomerId = 1337
message(s) sent message(s) not sent
message(s) sent

BATCH JOB
particular.net/blog/death-to-the-batch-job

Automated pattern matching
Daily reports
saga
notification
business events

go.particular.net/netfwdays

go.particular.net/
netfwdays
CODE THE FUTURE,
NOW