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Alter Table
Message
From
14/05/2007 04:49:05
 
 
To
11/05/2007 10:35:04
General information
Forum:
Visual FoxPro
Category:
Coding, syntax & commands
Title:
Environment versions
Visual FoxPro:
VFP 6 SP5
OS:
Windows XP SP2
Miscellaneous
Thread ID:
01224484
Message ID:
01225142
Views:
15
>>>>>Hi all,
>>>>>
>>>>>I have to do an Alter Table command on an indexed table. Am I loosing the index when I do that? And if so, how can I avoid it?
>>>>
>>>>
>>>>AFAIK No. There is no warning of such in Help, I've never heard of it and, indeed, I['ve done many an ALTER TABLE without even considering this.
>>>>
>>>>Howevr, if your alteration produces a new index, or, say, deletes a field that is already indexed, then obviously this will have an effect on your CDX file.
>>>>
>>>It works differently for tables and cursors. What you describe is true for tables, while cursors will lose index for any ALTER TABLE command.
>>
>>Aye, well he did say table.
>
>Right, but description of the problem pointed to a cursor. It is a rare case when table needs to be created and then altered in run-time, such scenario usually implies cursor.

I have a good example of where one does. I create a Census table, with keys, then I have to read a spreadsheet to find out what the domains of the census are, to add to the table, e.g. "Unemployed females 0-2 children", et al.
- Whoever said that women are the weaker sex never tried to wrest the bedclothes off one in the middle of the night
- Worry is the interest you pay, in advance, for a loan that you may never need to take out.
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