Information générale
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Titre:
APPEND BLANK to cursor, CANDIDATE INDEX, index violations
Versions des environnements
Network:
Windows 2003 Server
I'm getting some inconsistent errors that have left me confused about the situation.
I have created a cursor and a candidate index for that cursor. The index uses two fields of the cursor. Here is the INDEX command that I am using.
INDEX ON BINTOC(GroupID) + BINTOC(VisitID) TAG ixPrjSess CANDIDATE
GroupID and VisitID are integer fields. The index using these two fields should be unique, thus my use of CANDIDATE.
I use APPEND BLANK to add records to the cursor. After appending a blank record I fill in the fields with REPLACE commands.
Some of the time I can add records with the APPEND BLANK command without any errors. Other times I get an error saying that the uniqueness of the index is violated.
If a new index value is created when the APPEND BLANK is executed, I would expect that the index would be identical every time. Why do I not get a uniqueness violation every time?
Thanks for your thoughts.
Jim
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