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Steven Sitas, Ned!, ICI

Difference between WDMODFIC and HModifyStructure (WD17)

Startbeitrag von Steven Sitas am 18.11.2013 15:43

I have been using HModifyStructure - for sometime now - in my WinDEV 17 applications.
It seemed to work fine ...
Today I got a call from one of my customers - his database was totally "messed" up.
He got all kind of strange INTEGRITY ERRORS

I had done some analysis modifications, mostly added Links (but also fields) and I thought the HModifyStructure in my code would take care of them ....

I got the data and just finished the testing - here is what I learned.

1. HModifyStructure took care of the new fields
2. HModifyStructure made a TOTAL mess of the Links
3. After HModifyStructure the program opened the the database/files just fine. It just failed with some updates - due to INTERGRITY errors.

4. I ran WDMODFIC and it showed tens of tables that needed to be fixed.
I couldn't understand what type of "fix" they needed but I went on and WDMODFIC fixed everything.
I am using Windev17 and HFSQL 17
And in my Analysis ALL files are described as Classic HF and I change to HFSQL in my code.

Please note that the same app (in Classic) mode doesn't show the problem.

Anybody care to comment?


Hi Steven
Maybe , if you are not try, to try with HSetRep()
HSetRep() do something with links. You can see in help.

P.S. I also use HModifyStructure() but until today I has not similar problems.

Regards !

von ICI - am 18.11.2013 20:34

I have sent this request to PC Soft in the past and they came back to me with the follwing:


The update links is not supported by the HModifyStructure function, it is only the structure of the data. A suggestion to this effect has been forwarded to our development team and our quality team for the next versions.
You have to call HAddLink, this function can add/change the links between files on your server :


I am using HCreationIfNotFound and this seems to update files and links correctly.


von Ned! - am 19.11.2013 09:40
Hi Ned,
thanks for the info - I didn't know this limitation ...
When you say that HCreationifNotfound updates files and links correctly, what do you actually mean?
Does it change the TYPE of a link, already in the database?

Steven Sitas

von Steven Sitas - am 19.11.2013 13:56
Hi Steven,

Yes it will change the type of link, e.g. it will change a 1-to-1 link to a 1-to-Many link. So for me, the HCreationIfNotFound essentailly makes the deployed database have the same structure as you have in your analysis.


von Ned! - am 19.11.2013 14:03
Hi Ned,
I also use HCreationIfNotFound, but it doesn't change my links !!!!!!!
Just tried - WinDEV17 and HFSQL

von Steven Sitas - am 19.11.2013 14:26

The difference could be that you have HF Classic files in your analysis maybe? Mine are currently HFC/S in the analysis (using WD18 as well)

If you delete the link, is it created properly after that? It's not a good answer but it might work.

The best answer is for PC Soft to update HModifyStructure to update links and files!


von Ned! - am 19.11.2013 14:35
thanks for your suggestions.
I think I will make a small application to run WDMODFIC.
It is the only safe solution for now ...

Steven Sitas

von Steven Sitas - am 19.11.2013 14:53
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