BUG: Can Not Do Literal Update of Memo Fields Beyond 255 Chars

ID: Q114245

The information in this article applies to:

Microsoft Open Database Connectivity, version 1.0

BUG# ODBCDBASE: 2064 (1.01.1928)

SYMPTOMS

The ODBC Access driver gives a "data truncated" error (SQLSTATE 01004) when you try to update a memo field with a literal such that the total length of the updated field is greater than 255 characters. Furthermore, the memo field is truncated to 255 characters.

For example:

Create an Access table with a memo field in it. Insert one row into the table such that the memo field for that row has 220 chars. SQLExecDirect the following update statement on this table:


   update <table>
   set <memo-field-name> = <memo-field-name> + <a string of 40 chars>

SQLExecDirect will return the "data truncated" with SQLSTATE 01004; only 35 of the 40 chars get written to the table. Further attempts to increase the size of the memo field will fail with the same error message. The Access driver will not let you increase the size of the memo field to beyond 255 chars via updates using literals.

WORKAROUND

Use parameter markers in the update statement and pass the memo field value using SQLSetParam.

STATUS

Microsoft has confirmed this to be a problem in the Access Driver version 1.01.1928. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

Additional query words: 1.01.1928 ODBC ACCESS

Keywords :
Version : WINDOWS:1.0
Platform : WINDOWS
Issue type :