--- loncom/interface/loncoursedata.pm	2003/04/11 15:14:25	1.68
+++ loncom/interface/loncoursedata.pm	2003/04/21 15:12:37	1.70
@@ -1,6 +1,6 @@
 # The LearningOnline Network with CAPA
 #
-# $Id: loncoursedata.pm,v 1.68 2003/04/11 15:14:25 matthew Exp $
+# $Id: loncoursedata.pm,v 1.70 2003/04/21 15:12:37 matthew Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -137,8 +137,6 @@ sub get_sequence_assessment_data {
     # We need to keep track of which sequences contain homework problems
     # 
     my $previous;
-    $curRes = $iterator->next(); # BEGIN_MAP
-    $curRes = $iterator->next(); # The first item in the top level map.
     while (scalar(@Nested_Sequences)) {
         $previous = $curRes;
         $curRes = $iterator->next();
@@ -581,6 +579,36 @@ sub init_dbs {
 
 =pod
 
+=item &delete_caches()
+
+=cut
+
+################################################
+################################################
+sub delete_caches {
+    my $courseid = shift;
+    $courseid = $ENV{'request.course.id'} if (! defined($courseid));
+    #
+    &setup_table_names($courseid);
+    #
+    my $dbh = &Apache::lonmysql::get_dbh();
+    foreach my $table ($symb_table,$part_table,$student_table,
+                       $updatetime_table,$performance_table,
+                       $parameters_table ){
+        my $command = 'DROP TABLE '.$table.';';
+        $dbh->do($command);
+        if ($dbh->err) {
+            &Apache::lonnet::logthis($command.' resulted in error: '.$dbh->errstr);
+        }
+    }
+    return;
+}
+
+################################################
+################################################
+
+=pod
+
 =item &get_part_id()
 
 Get the MySQL id of a problem part string.
@@ -862,7 +890,8 @@ sub update_student_data {
             if ($parameter !~ /(timestamp|resource\.(.*)\.(solved|tries|awarded|award|awarddetail|previous))/) {
                 $newstring = "('".join("','",
                                        $symb_id,$student_id,
-                                       $parameter,$value)."'),\n";
+                                       $parameter)."',".
+                                           $dbh->quote($value)."),\n";
                 $num_parameters ++;
                 if ($newstring !~ /''/) {
                     $store_parameters_command .= $newstring;