--- loncom/interface/loncoursedata.pm	2003/10/01 20:50:13	1.97
+++ loncom/interface/loncoursedata.pm	2003/10/03 16:39:17	1.101
@@ -1,6 +1,6 @@
 # The LearningOnline Network with CAPA
 #
-# $Id: loncoursedata.pm,v 1.97 2003/10/01 20:50:13 matthew Exp $
+# $Id: loncoursedata.pm,v 1.101 2003/10/03 16:39:17 matthew Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -711,9 +711,6 @@ sub init_dbs {
                     { name => 'transaction',
                       type => 'MEDIUMINT UNSIGNED',
                       restrictions => 'NOT NULL' },
-                    { name => 'tries',
-                      type => 'SMALLINT UNSIGNED',
-                      restrictions => 'NOT NULL' },
                     { name => 'awarddetail',
                       type => 'TINYTEXT' },
 #                    { name => 'message',
@@ -1072,6 +1069,36 @@ sub get_student {
 
 =pod
 
+=item &clear_internal_caches()
+
+Causes the internal caches used in get_student_id, get_student,
+get_symb_id, get_symb, get_part_id, and get_part to be undef'd.
+
+Needs to be called before the first operation with the MySQL database
+for a given Apache request.
+
+=cut
+
+################################################
+################################################
+sub clear_internal_caches {
+    $have_read_part_table = 0;
+    undef(%ids_by_part);
+    undef(%parts_by_id);
+    $have_read_symb_table = 0;
+    undef(%ids_by_symb);
+    undef(%symbs_by_id);
+    $have_read_student_table = 0;
+    undef(%ids_by_student);
+    undef(%students_by_id);
+}
+
+
+################################################
+################################################
+
+=pod
+
 =item &update_full_student_data($sname,$sdom,$courseid)
 
 Does a lonnet::dump on a student to populate the courses tables.
@@ -1149,7 +1176,7 @@ sub update_full_student_data {
             # We can deal with 'timestamp' right away
             my @timestamp_storage = ($symb_id,$student_id,
                                      $transaction,$value);
-            my $store_command = 'INSERT INTO '.$fulldump_timestamp_table.
+            my $store_command = 'INSERT IGNORE INTO '.$fulldump_timestamp_table.
                 " VALUES ('".join("','",@timestamp_storage)."');";
             $dbh->do($store_command);
             if ($dbh->err()) {
@@ -1185,8 +1212,7 @@ sub update_full_student_data {
             }
             # deal with response specific data
             if (defined($resp_id) &&
-                $field =~ /^(tries|
-                             awarddetail|
+                $field =~ /^(awarddetail|
                              submission|
                              submissiongrading|
                              molecule)$/x) {
@@ -1213,7 +1239,7 @@ sub update_full_student_data {
     }
     ##
     ## Store the part data
-    my $store_command = 'INSERT INTO '.$fulldump_part_table.
+    my $store_command = 'INSERT IGNORE INTO '.$fulldump_part_table.
         ' VALUES '."\n";
     my $store_rows = 0;
     while (my ($symb_id,$hash1) = each (%$partdata)) {
@@ -1241,7 +1267,7 @@ sub update_full_student_data {
     }
     ##
     ## Store the response data
-    $store_command = 'INSERT INTO '.$fulldump_response_table.
+    $store_command = 'INSERT IGNORE INTO '.$fulldump_response_table.
         ' VALUES '."\n";
     $store_rows = 0;
     while (my ($symb_id,$hash1) = each (%$respdata)) {
@@ -1251,7 +1277,6 @@ sub update_full_student_data {
                     $store_command .= "('".join("','",$symb_id,$part_id,
                                                 $resp_id,$student_id,
                                                 $transaction,
-                                                $data->{'tries'},
                                                 $data->{'awarddetail'},
                                                 $data->{'response_specific'},
                                                 $data->{'response_specific_value'},
@@ -1381,10 +1406,10 @@ sub store_student_data {
     my $starttime = Time::HiRes::time;
     my $elapsed = 0;
     my $rows_stored;
-    my $store_parameters_command  = 'INSERT INTO '.$parameters_table.
+    my $store_parameters_command  = 'INSERT IGNORE INTO '.$parameters_table.
         ' VALUES '."\n";
     my $num_parameters = 0;
-    my $store_performance_command = 'INSERT INTO '.$performance_table.
+    my $store_performance_command = 'INSERT IGNORE INTO '.$performance_table.
         ' VALUES '."\n";
     return ('error',undef) if (! defined($dbh));
     while (my ($current_symb,$param_hash) = each(%{$student_data})) {
@@ -1854,6 +1879,7 @@ sub get_problem_statistics {
     return if (! defined($symb) || ! defined($part));
     $courseid = $ENV{'request.course.id'} if (! defined($courseid));
     #
+    &setup_table_names($courseid);
     my $symb_id = &get_symb_id($symb);
     my $part_id = &get_part_id($part);
     my $stats_table = $courseid.'_problem_stats';
@@ -1960,6 +1986,46 @@ sub execute_SQL_request {
     return ();
 }
 
+sub get_optionresponse_data {
+    my ($students,$symb,$response,$courseid) = @_;
+    return if (! defined($symb) || 
+               ! defined($response));
+    $courseid = $ENV{'request.course.id'} if (! defined($courseid));
+    #
+    &setup_table_names($courseid);
+    my $symb_id = &get_symb_id($symb);
+    my $response_id = &get_part_id($response);
+    #
+    my $dbh = &Apache::lonmysql::get_dbh();
+    return undef if (! defined($dbh));
+    my $request = 'SELECT '.
+        'a.response_specific_value, a.submission, b.timestamp, c.tries '.
+        'FROM '.$fulldump_response_table.' AS a '.
+        'LEFT JOIN '.$fulldump_timestamp_table.' AS b '.
+        'ON a.symb_id=b.symb_id AND a.student_id=b.student_id AND '.
+        'a.transaction = b.transaction '.
+        'LEFT JOIN '.$fulldump_part_table.' AS c '.
+        'ON a.symb_id=c.symb_id AND a.student_id=c.student_id AND '.        
+        'a.part_id=c.part_id AND a.transaction = c.transaction '.
+        'WHERE '.
+        'a.symb_id='.$symb_id.' AND a.response_id='.$response_id;
+    if (defined($students)) {
+        $request .= ' AND ('.
+            join(' OR ', map {'student_id='.
+                                  &get_student_id($_->{'username'},
+                                                  $_->{'domain'})
+                              } @$students
+                 ).')';
+    }
+    $request .= ' ORDER BY b.timestamp';
+    &Apache::lonnet::logthis("request =\n".$request);
+    my $sth = $dbh->prepare($request);
+    $sth->execute();
+    my $dataset = $sth->fetchall_arrayref();
+    if (ref($dataset) eq 'ARRAY' && scalar(@$dataset)>0) {
+        return @$dataset;
+    }
+}
 
 ################################################
 ################################################