Skip to main content

Roll back truncate command

How many times it has happened that somebody asks u a difference of Truncate and Delete,Atleast i am the person who used to say the very first point is that "TRUNCATE CAN NOT BE ROLLED BACK" untill i came across the blog post of Pinal Dave

So,the best way to understand any point is start with sample,here what we will do is we will create one table and we will create one transaction and under which we will be doing our truncate thing...and finally we will observe the result

Lets us start it by creating sample table and our transaction like following as shown below


CREATE TABLE temp (Name varchar(50))
INSERT INTO temp SELECT 'Moe'
INSERT INTO temp SELECT 'Larry'
INSERT INTO temp SELECT 'Curley'


BEGIN TRAN
   SELECT * FROM temp
   TRUNCATE TABLE temp
   SELECT * FROM temp
ROLLBACK TRAN
   SELECT * FROM temp
   
DROP TABLE temp

Now if you just copy and paste this above in your query editor and hit F5 (RUN),you would be surprise to see that even if you have performed TRUNCATE operation on your table,your data are still available at the end of transaction if we ROLLBACK

I was also got the feeling of learning something new with this helpful post by Pinal,which inspired me to write this post,so that we can use it for further reference

i hope this post is larning for you people as well

comments are welcomed...:-D

Comments

  1. AnandAugust 13, 2010 at 4:29 AM

    @Daivagna,

    this was really strange behavior.

    I couldn't digest the fact tht values are being retrieved even after truncate.

    thanx a lot 4 sharing this strange but correct information.

    keep it up...

    ReplyDelete
  2. ThiruSeptember 29, 2010 at 11:27 AM

    wow mind boggling..
    i searched on google for these kind of Example but i did not get...
    after i saw it i could understand real use of Roll back practically...

    thanks sir.....

    ReplyDelete

Post a Comment

Popular posts from this blog

High CPU to completely normal CPU - SXA issue, SXA pages not loading in mobile device

  Hi Team, Today i am going to share one of the nightmarish issue with you all, We are having Sitecore 9.1.1 hosted in azure PaaS environment Our site was working just fine and no noise, but we have been working on a feature release where 7-8 months of development needed to be released to production, Big GO LIVE event right?  Also to make the development smoother we also introduced BLUE/GREEN deployment slots in the same release, so we can easily SWAP slots and go live Everything went well, we went live, we even did load and performance testing on our staging and pre-prod and we were confident enough of results Very next day we started getting "SITE DOWN" alerts, and also product owners and clients mentioned that site is very slow for them in US time and in our morning when we were accessing it, it was working lighting fast so we were clue less at start, but we started digging  1) First thing caught our eyes were HIGH CPU spikes, in US time, also without any traffic CPU u...
3 comments
Read more

One or more exceptions occurred while processing the subscribers to the 'item:creating' event

I was recently installing the packages from one of the QA environment to my local Sitecore instance, "Media library package" to be precise, And it started giving me this below error One or more exceptions occurred while processing the subscribers to the 'item:creating' event Looking at the sitecore logs, it gave me more info on the context and the actual inner exception was following Solution: 'Name' should consist only of letters, digits, dashes or underscore Now it was evident that some of my file names were violating the naming rule, I could see in the log just before exception from where the installer stopped creating items, and that file name had round braces "(" and ")" at the end of it, with my surprise I was able to create the item with those name in the content tree, but below was the solution for it, Solution I am using SC 9.0.1 and in that Go to Sitecore.Marketing.config file residing in "App_Config\Sitecore\Mar...
9 comments
Read more

Set up leprechaun code generation with Sitecore XM Cloud Starterkit

Hi Sitecorians, It has been amazing learning year so far and with the change in technology and shift of the focus on frontend frameworks and composable products, it has been market demand to keep learning and exploring new things. Reasons behind this blog Today's topic is something that was in my draft from April-May, and I always thought that there is already a good documentation out there for  Leprechaun  and a blog post is not needed, Until I realized that there was so many of us facing same kind of issues and same kind of problems and spending same amount of time, That is where I thought, if I could write something which can reduce that repetitive troubleshooting time, That would really help the community. 1)  In a project environment, if we get into some configuration issues, we resolve them, we make sure we are not blocked and continue, but if you think same issue, same step and same scenario will come to other people, so if we can draft it online, it will help othe...
Post a Comment
Read more