BUG: Function dbcursorfetch Fails with Error 221 |
Q108685
The information in this article applies to:
- Microsoft SQL Server Programmer's Toolkit, version 4.2
BUG# 9696 (4.20.50)
SYMPTOMS
When calling DB-Library function dbcursorfetch with the FETCH_NEXT option in a medium-model MS-DOS application, the function call fails, generating error 221:
Column of type (%s) does not allow nulls. It may not be compared with null.
CAUSE
When building the query to perform the cursor fetch, DB-Library is incorrectly attempting to compare a NOT NULL column with the value NULL.
WORKAROUND
For MS-DOS programs, use the large-model DB-Library. The function dbcursorfetch behaves correctly on other operating systems.
STATUS
Microsoft has confirmed this to be a problem in DB-Library version 4.20.50. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.
Additional query words: db-lib dblib cursors
Keywords : kbprogramming
Issue type :
Technology : kbSQLServSearch kbAudDeveloper kbSQLServPTK420
Last Reviewed: March 19, 1999 |
