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EDB on a USB Drive |
Thu, May 28 2009 3:12 PM | Permanent Link |
David Michael | I thought I was finished migrating my application from DBISAM, but I think I just bumped into another issue.
My application can be installed to and run from a USB drive. The EDB configuration/catalog is stored on the USB drive, as well as any databases. The databases and stores are created with the path based on the PC where the USB drive is connected. Obviously, this path will probably be different (different drive letter at least) on a different computer. Do I need to detect that the path is different and update the database? If so, how do I do that without stomping on the database tables that already exist. Thanks. -David |
Thu, May 28 2009 4:09 PM | Permanent Link |
Tim Young [Elevate Software] Elevate Software, Inc. timyoung@elevatesoft.com | David,
<< Do I need to detect that the path is different and update the database? >> Yes. << If so, how do I do that without stomping on the database tables that already exist. >> ALTER DATABASE and ALTER STORE will allow you to change the path without touching the existing contents of the databases and stores. -- Tim Young Elevate Software www.elevatesoft.com |
Thu, May 28 2009 4:30 PM | Permanent Link |
David Michael | "Tim Young [Elevate Software]" wrote:
ALTER DATABASE and ALTER STORE will allow you to change the path without touching the existing contents of the databases and stores. I'll look into this. Thanks. A followup question: What happens if the EDB configuration/databases is burned to a CDROM? Can the software still function, or is it hosed? Thanks. -David |
Thu, May 28 2009 6:46 PM | Permanent Link |
Charalampos Michael | Dear Tim
> << Do I need to detect that the path is different and update the database? > >> > > Yes. Why Yes ? Relative Path works too -- Charalampos Michael - [Creation Power] - http://www.creationpower.gr |
Fri, May 29 2009 3:21 PM | Permanent Link |
Tim Young [Elevate Software] Elevate Software, Inc. timyoung@elevatesoft.com | David,
<< A followup question: What happens if the EDB configuration/databases is burned to a CDROM? Can the software still function, or is it hosed? >> The software will still function if the drive letters are valid, but if they are not then there won't be any way to change them since the configuration file will be read-only. I would only suggest putting a configuration file on a CD-ROM in instances where you know for a fact that you will never need to modify the configuration at all, i.e. the databases and stores referenced in the configuration are on (and only on) the CD-ROM itself. -- Tim Young Elevate Software www.elevatesoft.com |
Sat, May 30 2009 3:05 PM | Permanent Link |
David Michael | "Tim Young [Elevate Software]" wrote:
<< A followup question: What happens if the EDB configuration/databases is burned to a CDROM? Can the software still function, or is it hosed? >> The software will still function if the drive letters are valid, but if they are not then there won't be any way to change them since the configuration file will be read-only. I would only suggest putting a configuration file on a CD-ROM in instances where you know for a fact that you will never need to modify the configuration at all, i.e. the databases and stores referenced in the configuration are on (and only on) the CD-ROM itself. Well...crap. That sucks. No workaround at all? "Burn it and lose it" doesn't seem all that useful. Fortunately, this isn't something I run into much. But it was a feature of DBISAM that I'm sorry to lose. -David |
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