FIX: Conversion Errors Occur in Prepared Statements That Use UNIONs

This article was previously published under Q262462
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BUG #: 57554 (SQLBUG_70)
SYMPTOMS
When all of the following conditions are met, unexpected error messages may occur:
  • The OLE DB Provider for Microsoft SQL Server (Sqloledb.dll) is used.
  • Two or more parameters of different datatypes are used.
  • The statement is prepared.
  • The statement contains one or more UNION operators
Depending on the exact circumstances the error messages vary widely but may look similar to the following:
SQL error 241: Syntax error converting datetime from character string.
WORKAROUND
You can use either of the two following workarounds to avoid this problem:
  • Set the Prepared property of the Microsoft ActiveX Data Object (ADO) Command object to false.

  • Use the OLE DB Provider for ODBC Drivers and the ODBC Driver for Microsoft SQL Server.
STATUS
Microsoft has confirmed this to be a problem in SQL Server 7.0. This problem has been corrected in U.S. Service Pack 3 for Microsoft SQL Server 7.0. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
274799 INF: How to Obtain Service Pack 3 for Microsoft SQL Server 7.0 and Microsoft Data Engine (MSDE) 1.0
For more information, contact your primary support provider.
Conversion FMTONLY sp_prepare sp_execute
Properties

Article ID: 262462 - Last Review: 01/10/2015 06:22:09 - Revision: 3.1

Microsoft SQL Server 7.0 Standard Edition, Microsoft OLE DB Provider for SQL Server 7.01

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