Hello,
I am using proc sql pass through to extract xml data from a db2 server, the query looks like following:
select xmlquery('data($DATA/*:annotation/*:EventStart/@data)') as MyData
from db2server
The returned data is like following:
<?xml version="1.0" encoding="windows-1252" ?>1234567
But all I need is the numeric part, i.e., 1234567. How to remove the leading <?xml version="1.0" encoding="windows-1252" ?>?
Thanks.
You could use the TRANSTRN function to simply remove your code.
Aka something like
newstring=strip(Transtrn(oldvar,'<?xml version="1.0" encoding="windows-1252" ?>',''))
Of if you cannot guarantee that hte first section will always have this exact wording, you could simply substring the results starting at the first end position of >.
Aka something like
Newstring=substr(oldstring,find(oldstring,'>')+1,length(oldstring));
Note I didn't test either of these but in theory should work.
Thanks for reply. I am sure your method would work out, but I feel there should be a more xml-like way to do the job.
The more XML like way would need to happen as part of your XMLQuery expression. Once you get the result back it's just a string in a variable and you will need some string operation to get what you want. For the example string you've posted a simple RegEx should do though.
proc sql;
create table test as
select MyData, prxchange('s/<[^>]+>//oi',-1,MyData) as MyData_TagRemoved
from
/* and here your pass-through SQL block */
(
select '<?xml version="1.0" encoding="windows-1252" ?>1234567' as MyData
from sashelp.class(obs=1)
)
;
quit;
Regular Expressions are also implemented in DB2 IBM Knowledge Center. If you can't set-up your XMLQuery in a way that you only get back what you need then I'd probably would try and implement the string parsing/replacement within DB2 - so what I've done in above example with prxchange() - to not transfer unnecessary data from the Database to SAS.
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