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Issue #57 correction for unnecessary db operations #58

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Issue #57 correction for unnecessary db operations #58

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104 changes: 53 additions & 51 deletions lib.php
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Original file line number Diff line number Diff line change
Expand Up @@ -247,7 +247,7 @@ function block_grade_me_cache_reset() {
// Main cron function.
function block_grade_me_cache_grade_data() {
global $CFG, $DB;
$lastrun = $DB->get_field('task_scheduled', 'lastruntime', array('classname' => 'cache_grade_data'));
$lastrun = $DB->get_field('task_scheduled', 'lastruntime', array('classname' => '\block_grade_me\task\cache_grade_data'));
$params = array();
$params['itemtype'] = 'mod';
$enabledplugins = array_keys(block_grade_me_enabled_plugins());
Expand Down Expand Up @@ -371,60 +371,62 @@ function block_grade_me_cache_grade_data() {
// First get the list of quiz attempts for a course with manualgraded questions,
// and that have active students in them.
//

$sqlquizlist = "SELECT mq.id quizid, mqa.id quiattemptid, mqa.userid, mq.course, mqa.uniqueid,
qna.id questionattemptid
FROM {quiz} mq
JOIN {quiz_attempts} mqa ON mqa.quiz = mq.id
JOIN {question_attempts} qna ON qna.questionusageid = mqa.uniqueid
JOIN {user} mu ON mu.id = mqa.userid
WHERE course = ?
AND behaviour = 'manualgraded'
AND mu.deleted = 0";
$paramsquiz = array($cid);
$rsq = $DB->get_recordset_sql($sqlquizlist, $paramsquiz);
foreach ($rsq as $recattempt) {
$questionattemptid = $recattempt->questionattemptid;
$sqlcount = "SELECT count(sequencenumber) mseq
FROM {question_attempt_steps}
WHERE questionattemptid = ? and state ='needsgrading'";
$paramsteps = array($questionattemptid);
$gradingneeded = $DB->count_records_sql($sqlcount, $paramsteps);
if ($gradingneeded > '0') {
$sqlsteps = "SELECT max(sequencenumber) mseq
FROM {question_attempt_steps}
WHERE questionattemptid = ? and state ='needsgrading'";
$rsattempts = $DB->get_record_sql($sqlsteps, $paramsteps);
$maxseq = $rsattempts->mseq;
$needsgrading = '0';
if (!empty($maxseq)) {
$sqlmax = "SELECT max(sequencenumber) mseq2
FROM {question_attempt_steps}
WHERE questionattemptid = ?";
$rsmax = $DB->get_record_sql($sqlmax, $paramsteps);
$maxattempt = $rsmax->mseq2;
if ($maxattempt == $maxseq) {
$needsgrading = '1';
// We want to build the quiz table only when reseting the whole cache.

if ($coursemod == 0) {
$sqlquizlist = "SELECT mq.id quizid, mqa.id quiattemptid, mqa.userid, mq.course, mqa.uniqueid,
qna.id questionattemptid
FROM {quiz} mq
JOIN {quiz_attempts} mqa ON mqa.quiz = mq.id
JOIN {question_attempts} qna ON qna.questionusageid = mqa.uniqueid
JOIN {user} mu ON mu.id = mqa.userid
WHERE course = ?
AND behaviour = 'manualgraded'
AND mu.deleted = 0";
$paramsquiz = array($cid);
$rsq = $DB->get_recordset_sql($sqlquizlist, $paramsquiz);
foreach ($rsq as $recattempt) {
$questionattemptid = $recattempt->questionattemptid;
$sqlcount = "SELECT count(sequencenumber) mseq
FROM {question_attempt_steps}
WHERE questionattemptid = ? and state ='needsgrading'";
$paramsteps = array($questionattemptid);
$gradingneeded = $DB->count_records_sql($sqlcount, $paramsteps);
if ($gradingneeded > '0') {
$sqlsteps = "SELECT max(sequencenumber) mseq
FROM {question_attempt_steps}
WHERE questionattemptid = ? and state ='needsgrading'";
$rsattempts = $DB->get_record_sql($sqlsteps, $paramsteps);
$maxseq = $rsattempts->mseq;
$needsgrading = '0';
if (!empty($maxseq)) {
$sqlmax = "SELECT max(sequencenumber) mseq2
FROM {question_attempt_steps}
WHERE questionattemptid = ?";
$rsmax = $DB->get_record_sql($sqlmax, $paramsteps);
$maxattempt = $rsmax->mseq2;
if ($maxattempt == $maxseq) {
$needsgrading = '1';
}
}
if ($needsgrading == '1') {
$quizid = $recattempt->quizid;
$sqlstepid = "SELECT id FROM {question_attempt_steps} WHERE questionattemptid = ?
AND sequencenumber = ? and state = 'needsgrading'";
$paramsstepid = array($questionattemptid, $maxseq);
$rstepid = $DB->get_record_sql($sqlstepid, $paramsstepid);
$questionstepid = $rstepid->id;
$quizattemptid = $recattempt->uniqueid;
$courseid = $recattempt->course;
$userid = $recattempt->userid;
$sqlngrade = "INSERT INTO {block_grade_me_quiz_ngrade} ( attemptid, userid, quizid,
questionattemptstepid, courseid ) VALUES( ?, ?, ?, ?, ?)";
$paramsngrade = array($quizattemptid, $userid, $quizid, $questionstepid, $courseid);
$DB->execute($sqlngrade, $paramsngrade);
}
}
if ($needsgrading == '1') {
$quizid = $recattempt->quizid;
$sqlstepid = "SELECT id FROM {question_attempt_steps} WHERE questionattemptid = ?
AND sequencenumber = ? and state = 'needsgrading'";
$paramsstepid = array($questionattemptid, $maxseq);
$rstepid = $DB->get_record_sql($sqlstepid, $paramsstepid);
$questionstepid = $rstepid->id;
$quizattemptid = $recattempt->uniqueid;
$courseid = $recattempt->course;
$userid = $recattempt->userid;
$sqlngrade = "INSERT INTO {block_grade_me_quiz_ngrade} ( attemptid, userid, quizid,
questionattemptstepid, courseid ) VALUES( ?, ?, ?, ?, ?)";
$paramsngrade = array($quizattemptid, $userid, $quizid, $questionstepid, $courseid);
$DB->execute($sqlngrade, $paramsngrade);
}
}
}

}
}
set_config('cachedatalast', time(), 'block_grade_me');
Expand Down