Plateforme Level Extreme
Abonnement
Profil corporatif
Produits & Services
Support
Légal
English
Cannot Reuse Cursor Name
Message
De
30/09/2005 10:14:36
 
 
Information générale
Forum:
Visual FoxPro
Catégorie:
Codage, syntaxe et commandes
Versions des environnements
Visual FoxPro:
VFP 9
Divers
Thread ID:
01054734
Message ID:
01054889
Vues:
32
>>Hi All,
>>
>>Here's my newest dilema.
>>
>>I want to SELECT a record set from a cursor and assign the result cursor the same name as the source cursor
>>
>>
>>SELECT Field1 FROM crsTemp INTO CURSOR crsTemp GROUP BY Field1
>>
>>
>>In most cases this query executes with no problem and all is well. However, sometimes I get an error message "Alias name is already in use."
>>
>>How is it that sometimes it works fine and other times I get an error message?
>>
>>Aloha,
>>
>>James
>
>If you select fields in the same order as the original table, sometimes VFP creates filtered set. Add NOFILTER to your statement to make sure the real cursor is created.

The actual SELECT statement has both the NOFILTER and READWRITE parameters.

Here's the actual commands:
SELECT CompareCursor.UniqueID, CompareCursor.Positions, CompareCursor.Priority, ;
		DupGroup.GroupNum, CAST(0 as I) as Sequence ;
	FROM &lcCompareCursor CompareCursor ;
	INNER JOIN &lcDupGroupCursor DupGroup ;
	ON CompareCursor.MatchKey = DupGroup.MatchKey ;
	INTO CURSOR crsMatchResults ;
	ORDER BY GroupNum,Priority ;
	READWRITE NOFILTER 

*!* Do some other stuff, including passing it to and accessing it from other methods

*!* Then try to SELECT with only the fields required in the output cursor
SELECT UniqueID,PassCode,DupCode,Priority ;
	FROM crsMatchResults ;
	INTO CURSOR crsMatchResults ;
	GROUP BY UniqueID,PassCode,DupCode,Priority ;
	READWRITE NOFILTER 
I tried to simplify it but perhpas I should have posted the actual commands to start with.

Aloha,

James
Précédent
Suivant
Répondre
Fil
Voir

Click here to load this message in the networking platform