James, Having considered the same option some time back I did some tests and once the DBC is opened then access to the tables in it is considerably quicker than free tables. Also the additional security offered by the DBC is useful. All in all I can't see any valid reason for not having the DBC present as long as you remember the "set validate" option to off in VFP 9.
Also the OLEDB and ODBC drivers work much quicker with the DBC's as I also did lots of tests using these. One feature that you may not use but could investigate is the use of SP's and Triggers on the DBC which help to make the DBC more like Client Server and in fact you can write a Client server app to access either conventional DBC or MySQL, M$SQL with minimal change whereas converting free tables to work as Client/Server becomes more of a pain. Maybe taking a second breath and thinking about the disadvantages of going back. Just my 2c worth. Dave -----Original Message----- From: ProFox [mailto:[email protected]] On Behalf Of James Harvey Sent: 08 July 2013 14:03 To: 'ProFox Email List' Subject: RE: Fee tables from DBC Other than long fieldnames and primary keys I wasn't using any of the other features of a DBC, but did have occasional issues with the DBC, so to simplify things for my replacement I thought it would be best to "rollback" the DBC. It seems that primary keys are automatically converted to candidate keys when the table is removed from the dbc. James E Harvey M.I.S. Hanover Shoe Farms, Inc. www.hanoverpa.com office: 717-637-8931 cell: 717-887-2565 fax: 717-637-6766 -----Original Message----- From: ProFox [mailto:[email protected]] On Behalf Of Richard Kaye Sent: Monday, July 08, 2013 8:58 AM To: [email protected] Subject: RE: Fee tables from DBC Besides the long column names are you using any other DBC features? Primary key tags? Default values? One strategy might be to pull the data out of all DBC tables into free tables using SQL or even COPY TO (just make sure you use the FREE clause if you use COPY TO). The advantage to the latter is you could create the CDX at the same time as the DBF. It's pretty easy to programmatically iterate through all the tables in a DBC. What's the motivating factor for dumping the DBC? -- rk -----Original Message----- From: ProfoxTech [mailto:[email protected]] On Behalf Of James Harvey Sent: Monday, July 08, 2013 8:43 AM To: [email protected] Subject: Fee tables from DBC I think I've finally decided to stop using a DBC, and would like to revert back to a "Free" table scenario. One issue is that there are about a dozen field names in several tables longer than 10 char that will need to be changed in the structure and code. After that I will open the DBC and then "remove" each table. Once that's done I suppose I could just open Windows Explore and delete the dbc from the folder? A complete backup will be made prior to any changes being made. Does anyone who has done this before have any advice? TIA Jim James E Harvey M.I.S. Hanover Shoe Farms, Inc. www.hanoverpa.com office: 717-637-8931 cell: 717-887-2565 fax: 717-637-6766 [excessive quoting removed by server] _______________________________________________ Post Messages to: [email protected] Subscription Maintenance: http://mail.leafe.com/mailman/listinfo/profox OT-free version of this list: http://mail.leafe.com/mailman/listinfo/profoxtech Searchable Archive: http://leafe.com/archives/search/profox This message: http://leafe.com/archives/byMID/profox/[email protected] ** All postings, unless explicitly stated otherwise, are the opinions of the author, and do not constitute legal or medical advice. This statement is added to the messages for those lawyers who are too stupid to see the obvious.
