Hi, You will notice that this post was written eight years ago, and in the screen grab there is a lineage XML feed in the QVD. Looking at a number of QVDs now I can’t find a file with this information in, even when looking at QVDs from around that time. There was an option in QlikView to turn the storing of lineage data on or off, and switching it off for some QVDs was a good idea as it could cause a lot of bloat (particularly if you had loops in your generator script). If the information is there (and you can check this in a text editor) it should be easy to get it out, but what you need to be looking at is how to get it stored there – rather than how to get it out. Hope that helps!
Steve

But please could you also show the script for pulling the lineage data?
I don´t see that option when I select XML, and I would really like to see the script generated.
Been googling a lot but can´t find any example script, just links to companies wanting to sell their lineage software…

thanks!

Hi Ed,

The loading of meta data only works for QVD files, you will not be able to do it for other file types. The approach you have for file size and update time looks fine for that though.

If you only look at .qvd files (i.e. remove the extension loop) and use the code in the blog post above you should be able to load the meta data.

Good luck!

sub DoDir (Root)
For Each Ext in ‘qvw’, ‘qvo’, ‘qvs’, ‘qvt’, ‘qvd’, ‘qvc’, ‘qvf’
For Each File in filelist (Root&’\*.’ &Ext)
LOAD
‘$(File)’ as Name,
FileSize( ‘$(File)’ ) as Size,
FileTime( ‘$(File)’ ) as FileTime
autogenerate 1;
Next File
Next Ext
For Each Dir in dirlist (Root&’\*’ )
Call DoDir (Dir)
Next Dir
End Sub

Call DoDir (‘lib://Apps’)

Any idea?

Thanks

Hi Reddi,

It would appear that this field has changed in usage over time, looking at a few QVDs now I can see that some have text in here and others numbers. You just need to process that field in the load script, perhaps use an ApplyMap to deal with numbers, a capitalize to tidy it a bit, and an IF statement to fix the UNKNOWN. Perhaps something like:

Capitalize(ApplyMap(‘Map_Type’, [NumberFormat/Type])) as Type,

Map_Type can be an inline load, including UNKNOWN,Varchar.

Hope that helps.

Kindly help me regarding this, how to get Varchar as data type(now it is showing as Unknown) in qlikview application
Thanks & Regards,
Reddi Kishor

Hi Ralph. I have created an app that persists this information to QVD each day, with a date stamp so daily changed can be spotted. You could do the same against database metadata, without having to first create a QVD. Simply create an ODBC connection and use the SysTables and SysColumns load statements. Hope that points you in the right direction for what you need to create.

Generally data types don’t matter too much, as QlikView flexes to deal with whatever it is given.

You could do checks using functions like KeepChar, PurgeChar, Num# or a trick I sometimes uses is multiplying values by 1.

So things like this in your load script can flag different types of data:

if(Alt(FieldName * 1, 0) <> 0, 1, 0) as IsANumber,
if(len(FieldName) <> purgechar(FieldName, ‘0123456789’), 1, 0) as ContainsNumbers,
if(IsNull(Num(FieldName)), 1, 0) as NotANumber,

Some of the functions available, such as Num# you need to test carefully to ensure they always do what you expect – as some results can be counterintuitive.