[Mono-bugs] [Bug 49561][Maj] New - Casting error in libodbc.cs

bugzilla-daemon@bugzilla.ximian.com bugzilla-daemon@bugzilla.ximian.com
Tue, 30 Mar 2004 12:33:31 -0500 (EST)

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Changed by lluis@ximian.com.


--- shadow/49561	2004-03-30 12:33:31.000000000 -0500
+++ shadow/49561.tmp.5755	2004-03-30 12:33:31.000000000 -0500
@@ -0,0 +1,55 @@
+Bug#: 49561
+Product: Mono: Class Libraries
+Version: unspecified
+OS: unknown
+OS Details: 
+Status: RESOLVED   
+Resolution: FIXED
+Severity: Unknown
+Priority: Major
+Component: Sys.Data
+AssignedTo: mono-bugs@ximian.com                            
+ReportedBy: seifert@everybody.org               
+QAContact: mono-bugs@ximian.com
+TargetMilestone: ---
+Summary: Casting error in libodbc.cs
+I found a casting error in libodbc.cs for the method SQLDescribeCol.  The
+ColumnSize parameter should be an unsigned integer, not a short.  From the
+declaration from the MySQL ODBC driver:
+SQLDescribeCol(SQLHSTMT hstmt, SQLUSMALLINT icol,
+	       SQLCHAR FAR *szColName,
+	       SQLSMALLINT cbColNameMax,
+	       SQLSMALLINT FAR *pcbColName,
+	       SQLSMALLINT FAR *pfSqlType,
+	       SQLUINTEGER FAR *pcbColDef,
+	       SQLSMALLINT FAR *pibScale,
+	       SQLSMALLINT FAR *pfNullable)
+The attached patches fix this error.
+------- Additional Comments From seifert@everybody.org  2003-10-11 14:53 -------
+Created an attachment (id=5559)
+Patch for System.Data.Odbc.OdbcDataReader
+------- Additional Comments From seifert@everybody.org  2003-10-11 14:54 -------
+Created an attachment (id=5560)
+Patch for System.Data.Odbc.libodbc
+------- Additional Comments From seifert@everybody.org  2003-11-29 11:46 -------
+This has been sitting here for a while and untouched, so perhaps I
+should elaborate some more...
+ODBC drivers assume the ColumnSize parameter is an unsigned integer. 
+By setting it to a short in the Mono code, the previous parameter (the
+DataType) gets overridden with the upper bits from the ColumnSize. 
+Usually this means that a DataType of 0 gets returned no matter what,
+making the results very hard to decipher.
+------- Additional Comments From lluis@ximian.com  2004-03-30 12:33 -------
+The patch is already applied. Closing the bug