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Alter Table
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De
11/05/2007 10:35:04
 
 
À
11/05/2007 10:31:25
Information générale
Forum:
Visual FoxPro
Catégorie:
Codage, syntaxe et commandes
Titre:
Versions des environnements
Visual FoxPro:
VFP 6 SP5
OS:
Windows XP SP2
Divers
Thread ID:
01224484
Message ID:
01224631
Vues:
17
>>>>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.
Edward Pikman
Independent Consultant
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