Comments on: Reading Advantage Database Server Files (.ADT) in Ruby

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By: Alabama Medicaid Agency Open Records Act Compliance Issues | Chasing

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By: Chase Gray

Chase Gray — Thu, 04 Mar 2010 10:21:25 +0000

I tried to email you through some cableone.net email address.

I would like to discuss the Ruby driver you are talking about. Send me a message, either through email or twitter and we can set up a time to chat.

Many of the features you mentioned are on my to-do list. This month is very busy, but I'll hopefully have some of it done soon.

Thanks for your input.

By: J.D. Mullin

J.D. Mullin — Thu, 25 Feb 2010 08:04:59 +0000

Forgot to mention, you don't need the server to use the API, we have a free “local server” included with the API, which is just a shared object or DLL that loads with the process. So you would call AdsConnect60 and send in ADS_LOCAL_SERVER and then ACE will use local file access and doesn't require the server.

By: J.D. Mullin

J.D. Mullin — Thu, 25 Feb 2010 08:02:22 +0000

Plan on having an official Advantage Ruby driver this summer. We should chat at some point about this driver. I know it worked for you, but there are a lot of issues with reading the file directly and more limitations you might want to add to your documentation:

- can't access the files while Advantage has them open
- NULL values are not going to be read correctly
- variable length data (memo fields) are not going to work
- won't support encrypted tables
- deleted records might get read (not sure, the dbf code you started with might help this work OK)
- modtime and rownum fields probably won't work correctly

Cool that you got your task done, but I would think the Advantage Client Engine (ACE) API would have been a bit easier. These functions would be a good start: AdsOpenTable, AdsGetField, and AdsSkip. The API can be downloaded at http://devzone.advantagedatabase.com/dz/content...

J.D. Mullin
Advantage Database Server R&D Manager