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Fri, Aug 28 2015 2:43 PM | Permanent Link |
George | we are moving to a new development platform:
XE8 with dbIsam 4.41 Build 2 HOWEVER, the new client applications written in XE8 dbIsam 4.41 Build 2 WILL ALSO connect to old/existing dbisam servers, dbsrvr compiled in Delphi 7 with dbisam 4.19. The Client XE8 dbisam 4.41b2 will issue sql append, edit, update statements to the dsrsvr 4.19 We would like to confirm the following: Since the client xe8 dbisam 4.41b2 is connecting and “asking” the dbsrvr 4.19 to do the data edits, it is actually the dbsrvr 4.19 doing the data modifications- append, edit, delete. Thus in the above scenario, the breaking change in dbisam 4.28 regarding blob data updates will not corrupt existing tables in the dbsrvr 4.19 databases— as long as all client access are through the dbsrvr 4.19 server. Please confirm. Thanks, G Patena |
Sat, Aug 29 2015 10:57 AM | Permanent Link |
Roy Lambert NLH Associates ![]() | George
Theoretically what you want to do may be possible depending on the changes between 4.19 & 4.41 but its definitely not advisable. I use ElevateDB these days so don't now what changes were made between the versions. You quote one serious breaking change so my advice would be don't risk it. Tim knowing the product "slightly" better than myself may say its fine, howvwr, if your read through these newsgroups you'll find that the general advice is "don't mix versions". Roy Lambert |
Sat, Aug 29 2015 11:37 AM | Permanent Link |
Raul ![]() | On 8/28/2015 2:43 PM, George wrote:
> We would like to confirm the following: > Since the client xe8 dbisam 4.41b2 is connecting and “asking” the dbsrvr 4.19 to do the data edits, it is actually the dbsrvr 4.19 doing the data modifications- append, edit, delete. Yes. > Thus in the above scenario, the breaking change in dbisam 4.28 regarding blob data updates will not corrupt existing tables in the dbsrvr 4.19 databases— as long as all client access are through the dbsrvr 4.19 server. Assuming all your data access is thru the (4.19) dbsrvr then it is the only engine making actual data changes on disk. See here for more info on a similar question: http://www.elevatesoft.com/forums?action=view&category=dbisam&id=dbisam_cs&page=1&msg=7736#7736 Definitely read the release notes very carefully. Raul |
Mon, Aug 31 2015 10:42 AM | Permanent Link |
Tim Young [Elevate Software] Elevate Software, Inc. ![]() | George,
<< Thus in the above scenario, the breaking change in dbisam 4.28 regarding blob data updates will not corrupt existing tables in the dbsrvr 4.19 databases— as long as all client access are through the dbsrvr 4.19 server. >> That is correct. Tim Young Elevate Software www.elevatesoft.com |
Mon, Aug 31 2015 11:41 AM | Permanent Link |
George | Tim, Raul, Roy:
Thanks a lot ! ! ! Now coding with more confidence . . . . George |
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