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sikandar
Junior Member
Pakistan
135 Posts |
 Posted - 26 September 2007 : 22:44:29
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Hi,
I want to restore a topic from backup with all replies as it is deleted accidentally. Please guide me how can I restore or if there are any extraction queries then please let me know.
Thanks |
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MarcelG
Retired Support Moderator
Netherlands
2625 Posts |
Posted - 27 September 2007 : 04:51:14
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This is not exactly an easy task.....not a simple 'howto'.
What DB are you using? |
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tribaliztic
Senior Member
Sweden
1532 Posts |
Posted - 27 September 2007 : 05:11:33
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Since this is posted under mysql I guess that's the db used. It wouldn't be that hard if you have access to the backup files.
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/Tribaliztic
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HuwR
Forum Admin
United Kingdom
20600 Posts |
Posted - 27 September 2007 : 05:23:08
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| I think a mod has been posted that does this, try searching in the MOD forums |
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AnonJr
Moderator
United States
5768 Posts |
Posted - 27 September 2007 : 06:41:28
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| There are two MODs that I know of, but they are for un-archiving topics, not recovering deleted topics... unless I've missed something. I do know that this discussion has happened a few times before where you and Rui outlined all the steps with all the disclaimers etc. - just can't seem to find it at this point in time. Maybe when I get my first coffee of the day.... |
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HuwR
Forum Admin
United Kingdom
20600 Posts |
Posted - 27 September 2007 : 06:50:00
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| no. my fault, I misread the question sorry |
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ruirib
Snitz Forums Admin
Portugal
26364 Posts |
Posted - 27 September 2007 : 06:55:59
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From a practical point of view, the question is rather easy, admiting that archive tables and live tables have exactly the same columns in the same order!. If that is the case, this set of queries should work:
INSERT INTO FORUM_TOPICS
SELECT * FROM FORUM_A_TOPICS WHERE TOPIC_ID=xxx
INSERT INTO FORUM_REPLY
SELECT * FROM FORUM_A_REPLY WHERE TOPIC_ID=xxx
DELETE FROM FORUM_A_REPLY WHERE TOPIC_ID=xxx
DELETE FROM FORUM_A_TOPICS WHERE TOPIC_ID=xxx
Update counts should be run after this.
These are valid only for the conditions stated above. If the column order is not identical in the live and archive tables, the SELECT statements should explicitly pick the columns from the archive tables in the order they are present in the live tables. I also advise running the DELETE queries if and only if the previous two queries are executed with success.
Transactions won't normally be possible since most MySQL Dbs use MyISAM tables, which do not support them. If this wasn't the case, then all this should be run inside a transaction, which would ensure success or failure without the risk of unrecoverable data loss.
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AnonJr
Moderator
United States
5768 Posts |
Posted - 27 September 2007 : 08:29:51
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Based on the original post, I think he deleted the topic - not archived it - and he wants to restore it from a backup. Again, I'm not a morning person and I'm just now getting my coffee so I could be mistaken.  |
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ruirib
Snitz Forums Admin
Portugal
26364 Posts |
Posted - 27 September 2007 : 08:43:54
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| Yeah, it seems you're right, Mark. I guess importing the data to a "new table" could be the option, and then use a strategy like the one shown in my two insert queries would be the answer. |
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sikandar
Junior Member
Pakistan
135 Posts |
Posted - 27 September 2007 : 22:30:02
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Thanks to all of you. Well I have backup from where I have to restore the topic. Now what I will do as explained by ruirib will restore these two tables with different names and then will use two insert queries. Hope this will resolve the issue so let me try and will get back to you with my findings.
Thanks |
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sikandar
Junior Member
Pakistan
135 Posts |
Posted - 28 September 2007 : 02:22:32
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The info provided by ruirib really helped as I extracted rows from the backup file for these two tables and just insert those in the tables. It solved the problem so basically here tables to be addressed were important for me. Have a nice time.
Thanks |
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ruirib
Snitz Forums Admin
Portugal
26364 Posts |
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Topic Locked
