QVD Reader and Writer Tools

Topic
Alteryx only supports to read/write QVX files. For many Qlik users, it prefers to use QVD instead of QVX because of the benefits to have a smaller file size and also enjoy the optimized load. For fun, I have tried to build custom tools to read and write QVD. Currently, the tools are in trial purposes and only tackle a single file.

QVD Reader Tool
It reads QVD data into Alteryx memory.

QVD Writer Tool
It write Alteryx data in memory into QVD file.

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Kindly drop me a message for discussion and sharing. :-)

Input

Output

Tips and Tricks

Custom Tools

Qlik

Accepted answers

All comments

IraWatt

That's pretty impressive I was under the impression only QlikView could write to QVD. Would be very interesting to compare it to the yxdb files for read and write.

FMALLEA

Hi.. where can i download that trial version???

thaks so much

Kong

Due to some reasons, I am sorry that I am unable share it at this moment.

flying008

Hi, @Kong

This is really depressing news and I look forward to seeing your macro back again.

ianjonnaCAA

@Kong - how did you get on with sharing this little gem 🤞

Kellya10

May you share this tools? I would like to try.

Kong

Hi everyone. I have revised to use the latest Alteryx SDK. If you would like to try the prototype QVD Input Tool. You can go to: https://github.com/kongson-cheung/Alteryx-QVD-Tools/tree/main/yxi.

If you like to understand more, you can go to my blog for more details https://kongsoncheung.blogspot.com/2023/07/qlikview-data-file-reverse-engineering.html.

Kong

Hi, the QVD output tool prototype is also ready. You can go to https://github.com/kongson-cheung/Alteryx-QVD-Tools/tree/main/yxi to find v.1.1 to try out.

ianjonnaCAA

Fabulous, I will give it a whirl..

Cheers, ianjonna

elder_matos

Perfect, thank you so much for the help. I tested the functionality for reading QVD and fields of type date does not read, is null. to write the file and try to load in Qlik Sense, gives error also "Symbol table inconsistency". Is there any configuration to be done for the correct use of this extension?

Kong

can you provide the flow and data for a look？ As mentioned, this is just a prototype and a process of reverse engineering. There might be flaws. But I would be happy to see if it can be fixed

arjanloogman

Hi Kong,

At a client, I have been using your tool in Alteryx 2023. Client is currently looking at an upgrade to Alteryx 2024

I tested your tool in my own installation of Alteryx 2024.2, but when I insert the tool into a workflow, receive an error message about an outdated version of Python:

Screenshot 2025-02-14 at 15.04.55.png

Would you be able to create a newer version of the tool that is built with Python 3.10?

Kind regards,

Arjan Loogman

Kong

I did not realize it was in use somewhere. I have updated tools but I haven't done much testing. Please get it in my github. Please test and try and use with your own risk.

arjanloogman

Hi Kong,

Thank you for your quick reply!

I have installed and tested your new version on my personal installation of Alteryx 2024.2 and it seems to work fine here (both input and output).

I will contact my client and let them test and try at their own risk :-)

Much appreciated!

Kind regard,

Arjan Loogman

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