BUG: Can Not Do Literal Update of Memo Fields Beyond 255 Chars (114245)

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.