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FYI; Problem with PADL; .NULL. in SELECT SQL
Message
De
22/06/2009 08:59:14
Lutz Scheffler
Lutz Scheffler Software Ingenieurbüro
Dresden, Allemagne
 
 
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Versions des environnements
Visual FoxPro:
VFP 9 SP2
Divers
Thread ID:
01407500
Message ID:
01407530
Vues:
62
>>Gregory:
>>
>>as mentioned in the initial message:
>>
>>No behaviour change
>>
>>The record with this problem is deleted anyway and never comes up into the resultset
>>
>>BTW, it would be
>>
>>
>>padr(nvl(field, SET("Nulldisplay")), 11)
>>
>>
>>Agnes
>>
>>Update:
>>
>>Hm. I'm shure to have thisone tested, but now it gives right result with NVL. Need to re check
>>
>> Anyway, its wrong behaviour.
>>
>>?PADR(.NULL.,11) gives a result.
>>
>
>PADR(NULL,n) returns NULL. So, you always need to convert NULL to a string.
>
>Need to check if this behavior (PADR(NULL) = NULL) is documented.

Hm. something is strange or influenced by some SET command. I need to recreate the situation tomorrow.
I'm shure that I have tested the SELECT with NVL (it's to obvious) and also get some meaningfull return from NVL(.null.,11)+'A'

Anyway if the source is
1
.NULL.
2

it gives proper result, so shouldn't do

.NULL.
1
2

the same?

IOW
Words are given to man to enable him to conceal his true feelings.
Charles Maurice de Talleyrand-Périgord

Weeks of programming can save you hours of planning.

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