I have a column in SQL Server 2005 that stores a simple chunk of XML. At a later point processing is performed and I need to merge some processing info into the XML.
While I can do this at an intermediate point I would much prefer to keep this method centraliazed within the stored procedure that is responsible for updating other fields post-processing.
Here's an example of the XML I'm starting with and the type of outcome I'd like to achieve. Can anyone provide me some rough SQL to achieve it?
Update: Finally got it! I'll post the full solution when I get the chance, it was enough of a hack that someone else will hopefully find it useful
All finished! In the end I had a couple of additional requirements that required me to rework Marc's suggested solution and ditch the .modify() function entirely; however his answer let me get past my initial hurdles and got me to where I could step back and spot the easier approach. Here's my final solution!
How about this:
update yourTable
set (your XML column).modify('insert <processingData id="guid" someAttrib="x" /> as last into /someData[1]')
where .......
That should do it.
For more details on how to deal with XML in SQL Server 2005 and up, I keep going back to this article at 15 seconds which shows really nicely how to insert, modify, and delete XML fragments inside your SQL server fields, using XML DML statements.
Marc
Related
I'm working on updating hundreds of calculation views on SAP HANA.
I should update (for every calculation view) the last aggregation/projection columns : Keep flag = True.
There's a way, by updating XML Code of every calculation view file Like below:
<attribute id="EQUNR" order="3" attributeHierarchyActive="false"
displayAttribute="false" keepFlag="true">
<descriptions defaultDescription="EQUNR"/>
But, my question is, is there a way to update this Keep Flag through a query on SQL Console ?
if not, is there any other method you suggest guys ?
Every idea matters, Thank you folks
There is no way to achieve this via SQL.
Although you may be able to author a regex expression that matches some of the target XML tags, there’s no way of correctly updating the repository tables storing the source XML (if you’re using the HANA classic repository).
For HANA 2 HDI files no DB command can change the source code as these are not stored in the database.
Beyond this technical issue, it’s probably not a good idea to apply a flag that changes query semantics as a batch update.
I would like to be able to tag an SQL query somehow, so I can relate the query execution to the web request that triggered the query. I already have a unique request id, that I tag my logs and other monitoring with, so I can easily do a complete trace across the weblogs and new relic for example.
But when I look at a report of long running SQL queries for example, I cannot trace that back to the request that triggered the SQL Query. I would really like to be able to tag the query with my request id somehow.
I can't find anything online. When I search I just find blogs about storing tags and tag clouds in SQL. Not really what I need.
Hope the question makes sense.
This is a very interesting post...
I hope, adding an extra nullable parameter to your stored procedure(s) will ensure that the profiler will catch the unique id passed during a call (in the trace) whether you use that parameter inside the procedure or not (i.e. to do something meaningful...like inserting into an audit table with unique id, procedure name, timestamp etc).
But I think that will make life difficult as you now have to update all your procedures.
If you already have logging turned on (web server) and it captures the same unique id in its request (log file) along with a timestamp then you probably can code a small utility app that reads the log file and find matching entries in the traced table by the timestamp alone.
The only thing that might go wrong is if your web server and database server have differeing times (you need to offset your calculation accordingly).
I don't know if this will help but it is certainly a very interesting project and I am hoping somebody have experienced this thing and came up with a nice solution.
Will be closely watching this post if such a solution exists....
All the best...
If I understand correctly, you want to follow up the query execution in Activity Monitor. But have you considered using a DMV or SQL PROFILER ?
In my opinion, your best bet would be to wrap it in a stored proc. This way you will be able to FILTER your trace only for this object. Here's an example of a simple select and the same select wrapped in stored proc named sproc1 :
As you can see in this image, you can start a SQL PROFILER trace and filter it on the ObjectName. You can then add other column like CPU, StartTime, ...
If you can't use a stored proc, then I would suggest to insert a comment before the exec like this:
/* ID1234 */
select * from table1
Then use SQL PROFILER the same way but you now filter on the TextData using your ID
Here the result :
I'm part of a team writing an ERP using , Seam, and Jboss, and on one of my pages, I keep getting an SQL error: 8152 whenever I try to input something. SQL error:8152, for those of you who don't know, is when you try to input a value over the maximum limit of the column.
I've double checked my entity and the database, and their maximum value limits are the same (50 nvarchars). In addition, I'm pretty sure that we're not using audit tables. I then put System.out.println(""); all over the place, and found that the error was happening in between these two println(s):
System.out.println("Flushing");
entityManager.flush();
System.out.println("Flushing complete");
Which is part of a method that process all changes to the table. But I'm pretty new to programming and not sure what's going on.
Any help would be appreciated, thanks in advance, Jeff.
P.s. Code on request, but I didn't post it because there is a lot of it all over the place.
I would verify the SQL that is being executed when the flush() is performed. That way you can see the length of your data and verify that it is too big as shown by the DB error.
If you are using Hibernate, you can output SQL to the console. You don't say what your DB is, but if it's SQL Server you can use the profiler to see what SQL is being executed.
I'm using a DB2 database and I'm hoping for a query which will iterate over all stored procedures in a single database and print out the source code of each. No fancy formatting or performance requirements.
The reason for this (in case there's a better way of doing it) is I'm trying to track down usages of a particular table in our stored procs, so I want to be able to do a simple text search through all of them.
Also, I've got access to SQuirreL SQL client if anyone knows of a way via that.
Ah, figured it out. For other's reference:
select ROUTINENAME, TEXT from syscat.routines
where definer not in ('SYSIBM') AND ROUTINESCHEMA='databaseName'
I know this is old, but your answer started me on the right track. We are also using DB2, but don't have syscat.routines visible to us. However we do have SYSIBM.SYSROUTINES and that allows similar by doing
SELECT SCHEMA,
NAME,
TEXT
FROM SYSIBM.SYSROUTINES
WHERE SCHEMA = '<SCHEMA>'
and NAME = '<NAME>'
FOR FETCH ONLY WITH UR;
I have made an update statement in a table in SQL 2008 which updated the table with some wrong data.
I didn't have a backup for the DB.
It's some important dates which got updated.
Is there anyway where i can recover the old data from the table.
Thanks
SNA
Basically no unless you want to use a commercial log reader and try go through it with a fine tooth comb. No backup of the database can be an 'update resume, leave town' scenario - harsh but it just should not happen.
Andrew basically has called it. I just want to add a few ideas you can consider if you are desperate:
Are there any reports or printouts lying around? Perhaps you can reconstruct the data from there.
Was this data entered via a web application? If so, there is a remote chance you can find the original data in the web server logs, depending upon how the app was constructed, etc.
Does this app interface (pass data to) any other applications? They may have a buffered copy of data...
Can the data be derived from any other existing data? Is there an audit log table, or another date in your schema based on this one, from which you can reconstruct the original date?
Edit:
Some commenters are mentioning that is is a good idea to test your update/delete statements before running them. For this to become habit, it helps if you have an easy method. I usually create my DELETE statements like this:
--delete --select *
from [User]
where UserID=27
To run the select in order to test your query, highlight everything from select onwards. To then run the delete if you are satisfied with the filter criteria, highlight everything from delete onwards. The two dashes in front of delete are so that if the query accidentally gets run, it will just crash due to invalid syntax.
You can use a similar construct for UPDATE statements, although it is not quite as clean.
SQL server keeps log for every transation.So you can recover your modified data from the log as well without backup.
Select [PAGE ID],[Slot ID],[AllocUnitId],[Transaction ID]
,[RowLog Contents 0], [RowLog Contents 1],[RowLog Contents 3],[RowLog Contents 4]
,[Log Record]
FROM sys.fn_dblog(NULL, NULL)
WHERE
AllocUnitId IN
(Select [Allocation_unit_id] from sys.allocation_units allocunits
INNER JOIN sys.partitions partitions ON (allocunits.type IN (1, 3)
AND partitions.hobt_id = allocunits.container_id) OR (allocunits.type = 2
AND partitions.partition_id = allocunits.container_id)
Where object_id=object_ID('' + 'dbo.student' + ''))
AND Operation in ('LOP_MODIFY_ROW','LOP_MODIFY_COLUMNS')
And [Context] IN ('LCX_HEAP','LCX_CLUSTERED')
Here is the artcile, that explains step by step, how to do it.
http://raresql.com/2012/02/01/how-to-recover-modified-records-from-sql-server-part-1/
Imran
Thanks for all the responses.
The problem was actually accidentally ---i missed to select the where condition in the update statement.---Rest !.
It was a quick 5 minutes task --Like just changing the date to test for one customer data--so we didn't think of taking a backup.
Yes of course you are true ..This is a lesson.
Now onwards i will be careful to write "my update statements in a transaction." or "test my update statements"
Thanks once again--for spending your time to give some insight rather ignoring the question since the only answer is "NO".
Thanks
SNA
Always take a backup before major UPDATE statements, even if it's not used, there's the peace of mind
Especially with Red Gate's Object Level Restore, one can restore individual table/row now given a backup file
Good luck, I'd suggest finding an old copy elsewhere (DEV/QA) etc...
Isn't it possible to do a rollback on an UPDATE statement?
Late one but hopefully useful…
If database is in full recovery mode then all transactions are logged in transaction log and can be retrieved. Problem is that this is not natively supported because this is not the main purpose of the transaction log.
Options are:
Commercial tools such as Apex Log (more expensive, more options) or Quest Toad (less expensive, less options for this purpose main focus is on SQL Server management)
Trying to do this yourself, like user1059637 pointed out. Problem with this approach is that it can’t read transaction log backups and is more tedious.
It comes down to how much your data is worth to you in terms of time and $.