Added drop column.

git-svn-id: https://samskivert.googlecode.com/svn/trunk@1636 6335cc39-0255-0410-8fd6-9bcaacd3b74c

projects/samskivert/src/java/com/samskivert/jdbc/JDBCUtil.java

@@ -375,6 +375,26 @@ public class JDBCUtil
                  "' modified to have this def '" + cdef + "'.");
     }
 
+    /**
+     * Removes a column from the specified table.
+     */
+    public static void dropColumn (Connection conn, String table, String cname)
+        throws SQLException
+    {
+        String update = "ALTER TABLE " + table + " DROP COLUMN " + cname;
+
+        PreparedStatement stmt = null;
+        try {
+            stmt = conn.prepareStatement(update);
+            if (stmt.executeUpdate() == 1) {
+                Log.info("Database index '" + cname + "' removed from " +
+                        "table '" + table + "'.");
+            }
+        } finally {
+            close(stmt);
+        }
+    }
+    
     /**
      * Removes a named index from the specified table.
      */
@@ -394,7 +414,7 @@ public class JDBCUtil
             close(stmt);
         }
     }
-
+    
     /**
      * Removes the primary key from the specified table.
      */