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What does SQLEXEC() return after an UPDATE... command?
Message
De
16/10/2004 14:31:30
Cetin Basoz
Engineerica Inc.
Izmir, Turquie
 
 
À
16/10/2004 13:37:45
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Divers
Thread ID:
00951936
Message ID:
00951972
Vues:
12
>>>I do an UPDATE command using SQLEXEC.
>>>I *know* that the conditions specified (WHERE clause) cannot be matching, yet I seem to be getting a "1" back (updating only 1 record each call). The record is *NOT* being updated, which is what I want, but the return code is telling me to update a list that is shown to the user to indicate records updated.
>>>
>>>The Help says:
>>>"Numeric data type.
>>>SQLEXEC( ) returns the number of result sets if there is more than one. SQLEXEC( ) returns 0 if it is still executing and returns 1 when it has finished executing. SQLEXEC( ) returns –1 if a connection level error occurs.

>>>
>>>SO what does it return after an UPDATE command? I had guessed that it would return the number of records updated but that is obviously wrong.
>>>
>>>Thanks
>>>Jim
>>
>>Jim,
>>Take that "1" as command successfully finished executing w/o any errors.
>>Update might finish successfully yet no records are updated (ie: no match to where clause). Just before update try a select with the same where to see if that's the reason.
>
>Cetin (and Fabio),
>
>That apparently is what I have to do... but I want(ed) to avoid an extra SELECT because this is run inside a MSCOMMCTL where timing is critical.
>I had already specified that the SQLs (using VFP ODBC by the way) should be synchronous (and batchmode for insurance) and I had also limited my updates to single records to both make it fastest possible and provide possibility of clear return code.
>
>With this limitation I wonder why so many people say SPT is the best way to do this stuff?
>
>Anyway, thanks both of you
>Jim
>
>>Cetin

Jim,
There is a misunderstanding. I said use select only to see if where has any matches (you said no records were updated).
Second single record updates are slower than batch multiple updates.
Cetin
Çetin Basöz

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