Integration Services (SSIS)

Technical Article

Automatic Restart of SSIS packages after Failover or Failure

  • Article

SSIS makes it possible to minimize work lost by starting after the last successfully executed control flow task upon restarting a failed package. From there, one challenge many seek to overcome is automatically restarting that package at that point without any manual intervention. This would make it possible for your SSIS packages to be running, your cluster to failover, and your SSIS packages to restart and complete without you having to respond to the failover and restart them.

2010-09-03

2,181 reads

Technical Article

A deadlock was detected while trying to lock variables in SSIS

  • Article

Error: 0xC001405C at SQL Log Status: A deadlock was detected while trying to lock variables "User::RowCount" for read/write access. A lock cannot be acquired after 16 attempts. The locks timed out. Have you ever considered variable locking when building your SSIS packages? I expect many people haven’t just because most of the time you never see an error like the one above. I’ll try and explain a few key concepts about variable locking and hopefully you never will see that error

2010-08-26

3,320 reads

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Question of the Day

The string_agg function

We create the following table and then insert some records in it:

create table t1 (
   id int primary key,
   category char(1) not null,
   product varchar(50)
);

insert into t1 values
(1, 'A', 'Product 1'),
(2, 'A', 'Product 2'),
(3, 'A', 'Product 3'),
(4, 'B', 'Product 4'),
(5, 'B', 'Product 5');
What happens if we execute the following query in both Sql Server and PostgreSQL?
select id, 
category, 
string_agg(product, ';')
                 over (partition by category order by id
                 rows between unbounded preceding and unbounded following) as stragg
from t1;

See possible answers