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INSERT not as maintainable?
Message
De
26/07/2006 16:32:32
Mike Yearwood
Toronto, Ontario, Canada
 
Information générale
Forum:
Visual FoxPro
Catégorie:
Autre
Divers
Thread ID:
01140411
Message ID:
01140444
Vues:
24
>>>
>>>In addition to Cetin:
>>>You could easily violate some PK. Try following situation:
>>>
>>>CREATE CURSOR Test (Fld1 int, Fld2 C(20))
>>>INDEX ON Fld1 TAG Test CANDIDATE
>>>APPEND BLANK
>>>*** Something happens here and the user quit the application
>>>
>>>*** Next time S/He needs to insetr new record:
>>>APPEND BLANK && BOOOOOOOOOOOOOOOOOOOOOOM
>>>
>>>
>>>*** But with this:
>>>CREATE CURSOR Test (Fld1 int, Fld2 C(20))
>>>INDEX ON Fld1 TAG Test CANDIDATE
>>>INSERT INTO Test VALUES (2,-2) && BOOOOOOM, but no record is inserted
>>>INSERT INTO Test VALUES (2,[asasa])
>>>
>>>
>>>*** Also:
>>>CREATE CURSOR Test (Fld1 int, Fld2 C(20))
>>>INDEX ON Fld1 TAG Test CANDIDATE
>>>APPEND BLANK
>>>INSERT INTO Test VALUES (2,[asasa])
>>>BROW NORMAL
>>>
>>
>>
>>Buffering removes these concerns as well, no?
>
>O, yes :-)
>Buffering and/or Transactions remove all concerns, buy I still prefer INSERT :-)
>You could make it more redable with a few comments:
>
>INSERT INTO Test (;
>                  Field1,;
>                  Field2,;
>                  Field3 ;
>                  );
>            VALUES;
>                  (;
>                  Expr1,; && Field1
>                  Expr2,; && Field2
>                  Expr3;  && Field3
>                  )
>
Not funny! More typing leads to more mistakes!! :)
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