diff --git a/admin/roles/tests/privacy/provider_test.php b/admin/roles/tests/privacy/provider_test.php
index 659a1ef2869..fab062222a3 100644
--- a/admin/roles/tests/privacy/provider_test.php
+++ b/admin/roles/tests/privacy/provider_test.php
@@ -190,48 +190,48 @@ class provider_test extends provider_testcase {
                 if ($data = $writer->get_data($subcontextstudent)) {
                     $this->assertEquals($user->id, reset($data)->userid);
                 }
-                if ($data = $writer->get_data($subcontextrc)) {
+                if ($data = (array)$writer->get_data($subcontextrc)) {
                     $this->assertEquals('moodle/backup:backupactivity', reset($data)->capability);
                     $this->assertEquals($strpermissions[CAP_ALLOW], reset($data)->permission);
                 }
             }
             if ($context->contextlevel == CONTEXT_COURSE) {
-                if ($data = $writer->get_data($subcontextstudent)) {
+                if ($data = (array)$writer->get_data($subcontextstudent)) {
                     $this->assertEquals($user->id, reset($data)->userid);
                 }
-                if ($data = $writer->get_data($subcontextrc)) {
+                if ($data = (array)$writer->get_data($subcontextrc)) {
                     $this->assertEquals('moodle/backup:backupcourse', reset($data)->capability);
                 }
             }
             if ($context->contextlevel == CONTEXT_COURSECAT) {
-                if ($data = $writer->get_data($subcontextmanager)) {
+                if ($data = (array)$writer->get_data($subcontextmanager)) {
                     $this->assertEquals($user->id, reset($data)->modifierid);
                 }
-                if ($data = $writer->get_data($subcontextrc)) {
+                if ($data = (array)$writer->get_data($subcontextrc)) {
                     $this->assertEquals('moodle/category:manage', reset($data)->capability);
                 }
             }
             if ($context->contextlevel == CONTEXT_SYSTEM) {
-                if ($data = $writer->get_data($subcontextmanager)) {
+                if ($data = (array)$writer->get_data($subcontextmanager)) {
                     $this->assertEquals($user->id, reset($data)->modifierid);
                 }
-                if ($data = $writer->get_data($subcontextrc)) {
+                if ($data = (array)$writer->get_data($subcontextrc)) {
                     $this->assertEquals('moodle/backup:backupcourse', reset($data)->capability);
                 }
             }
             if ($context->contextlevel == CONTEXT_BLOCK) {
-                if ($data = $writer->get_data($subcontextstudent)) {
+                if ($data = (array)$writer->get_data($subcontextstudent)) {
                     $this->assertEquals($user->id, reset($data)->userid);
                 }
-                if ($data = $writer->get_data($subcontextrc)) {
+                if ($data = (array)$writer->get_data($subcontextrc)) {
                     $this->assertEquals('moodle/block:edit', reset($data)->capability);
                 }
             }
             if ($context->contextlevel == CONTEXT_USER) {
-                if ($data = $writer->get_data($subcontextmanager)) {
+                if ($data = (array)$writer->get_data($subcontextmanager)) {
                     $this->assertEquals($user->id, reset($data)->userid);
                 }
-                if ($data = $writer->get_data($subcontextrc)) {
+                if ($data = (array)$writer->get_data($subcontextrc)) {
                     $this->assertEquals('moodle/competency:evidencedelete', reset($data)->capability);
                 }
             }
@@ -415,7 +415,7 @@ class provider_test extends provider_testcase {
         provider::export_user_role_to_cohort($user->id);
         $writer = writer::with_context($contextuserassignover);
         $this->assertTrue($writer->has_any_data());
-        $exported = $writer->get_related_data($subcontextteacher, 'cohortroles');
+        $exported = (array)$writer->get_related_data($subcontextteacher, 'cohortroles');
         $this->assertEquals($user->id, reset($exported)->userid);
 
         // Test User is member of a cohort which User2 is assigned to role to this cohort.
@@ -432,7 +432,7 @@ class provider_test extends provider_testcase {
         provider::export_user_role_to_cohort($user->id);
         $writer = writer::with_context($contextuser);
         $this->assertTrue($writer->has_any_data());
-        $exported = $writer->get_related_data($subcontextteacher, 'cohortroles');
+        $exported = (array)$writer->get_related_data($subcontextteacher, 'cohortroles');
         $this->assertEquals($user2->id, reset($exported)->userid);
     }
 
diff --git a/admin/tool/usertours/tests/privacy/provider_test.php b/admin/tool/usertours/tests/privacy/provider_test.php
index bc70e6bc924..907feb48352 100644
--- a/admin/tool/usertours/tests/privacy/provider_test.php
+++ b/admin/tool/usertours/tests/privacy/provider_test.php
@@ -145,8 +145,8 @@ class provider_test extends \core_privacy\tests\provider_testcase {
         $writer = writer::with_context(\context_system::instance());
         $this->assertTrue($writer->has_any_data());
 
-        $prefs = $writer->get_user_preferences('tool_usertours');
-        $this->assertCount(1, (array) $prefs);
+        $prefs = (array)$writer->get_user_preferences('tool_usertours');
+        $this->assertCount(1, $prefs);
 
         // We should have received back the "completed tour" preference of the test user.
         $this->assertStringStartsWith('You last marked the "' . $tour->get_name() . '" user tour as completed on',
@@ -180,8 +180,8 @@ class provider_test extends \core_privacy\tests\provider_testcase {
         $this->assertTrue($writer->has_any_data());
 
         // We should have one preference.
-        $prefs = $writer->get_user_preferences('tool_usertours');
-        $this->assertCount(1, (array) $prefs);
+        $prefs = (array)$writer->get_user_preferences('tool_usertours');
+        $this->assertCount(1, $prefs);
 
         // The preference should be related to the first tour.
         $this->assertStringContainsString($tour1->get_name(), reset($prefs)->description);
diff --git a/auth/mnet/tests/privacy/provider_test.php b/auth/mnet/tests/privacy/provider_test.php
index 097077f61d3..01fac8140b2 100644
--- a/auth/mnet/tests/privacy/provider_test.php
+++ b/auth/mnet/tests/privacy/provider_test.php
@@ -111,7 +111,7 @@ class provider_test extends provider_testcase {
         $approvedlist = new approved_contextlist($user, 'auth_mnet', [$usercontext->id]);
         provider::export_user_data($approvedlist);
 
-        $data = $writer->get_data([get_string('pluginname', 'auth_mnet'), $hostrecord->name, $logrecord->coursename]);
+        $data = (array)$writer->get_data([get_string('pluginname', 'auth_mnet'), $hostrecord->name, $logrecord->coursename]);
 
         $this->assertEquals($logrecord->remoteid, reset($data)->remoteid);
         $this->assertEquals(transform::datetime($logrecord->time),  reset($data)->time);
diff --git a/enrol/tests/privacy/provider_test.php b/enrol/tests/privacy/provider_test.php
index 37b3efad19d..6b3ffe46f59 100644
--- a/enrol/tests/privacy/provider_test.php
+++ b/enrol/tests/privacy/provider_test.php
@@ -98,7 +98,7 @@ class provider_test extends provider_testcase {
         writer::reset();
         $writer = writer::with_context($coursecontext2);
         $this->export_context_data_for_user($user1->id, $coursecontext2, 'core_enrol');
-        $data = $writer->get_related_data($subcontexts, 'manual');
+        $data = (array)$writer->get_related_data($subcontexts, 'manual');
         $this->assertEquals($enrolmentcouse2->status, reset($data)->status);
         $this->assertEquals(transform::datetime($enrolmentcouse2->timestart), reset($data)->timestart);
         $this->assertEquals(transform::datetime($enrolmentcouse2->timeend), reset($data)->timeend);
diff --git a/lib/dml/sqlsrv_native_moodle_database.php b/lib/dml/sqlsrv_native_moodle_database.php
index 3eef334224b..55ad90ab49a 100644
--- a/lib/dml/sqlsrv_native_moodle_database.php
+++ b/lib/dml/sqlsrv_native_moodle_database.php
@@ -978,10 +978,11 @@ class sqlsrv_native_moodle_database extends moodle_database {
         $results = array();
 
         foreach ($rs as $row) {
-            $id = reset($row);
+            $rowarray = (array)$row;
+            $id = reset($rowarray);
 
             if (isset($results[$id])) {
-                $colname = key($row);
+                $colname = key($rowarray);
                 debugging("Did you remember to make the first column something unique in your call to get_records? Duplicate value '$id' found in column '$colname'.", DEBUG_DEVELOPER);
             }
             $results[$id] = (object)$row;
@@ -1006,7 +1007,8 @@ class sqlsrv_native_moodle_database extends moodle_database {
         $results = array ();
 
         foreach ($rs as $row) {
-            $results[] = reset($row);
+            $rowarray = (array)$row;
+            $results[] = reset($rowarray);
         }
         $rs->close();
 
diff --git a/mnet/service/enrol/tests/privacy/provider_test.php b/mnet/service/enrol/tests/privacy/provider_test.php
index c9f61804152..55b9239eacb 100644
--- a/mnet/service/enrol/tests/privacy/provider_test.php
+++ b/mnet/service/enrol/tests/privacy/provider_test.php
@@ -106,8 +106,8 @@ class provider_test extends provider_testcase {
         $this->assertFalse($writer->has_any_data());
         $approvedlist = new approved_contextlist($user, 'mnetservice_enrol', [$usercontext->id]);
         provider::export_user_data($approvedlist);
-        $data = $writer->get_data($subcontexts);
-        $this->assertCount(1, (array)$data);
+        $data = (array)$writer->get_data($subcontexts);
+        $this->assertCount(1, $data);
         $this->assertEquals($this->mnethost->name, reset($data)->host);
         $remotecoursename = $DB->get_field('mnetservice_enrol_courses', 'fullname',
             array('remoteid' => $this->enrolment->remotecourseid));
diff --git a/mod/h5pactivity/tests/privacy/provider_test.php b/mod/h5pactivity/tests/privacy/provider_test.php
index ae7dc492c9a..e39f1623e89 100644
--- a/mod/h5pactivity/tests/privacy/provider_test.php
+++ b/mod/h5pactivity/tests/privacy/provider_test.php
@@ -123,21 +123,21 @@ class provider_test extends provider_testcase {
         $data = $writer->get_data([]);
         $this->assertEquals('H5P 1', $data->name);
 
-        $data = $writer->get_data($subcontextattempt1);
-        $this->assertCount(1, (array) $data);
+        $data = (array)$writer->get_data($subcontextattempt1);
+        $this->assertCount(1, $data);
         $this->assertCount(3, (array) reset($data));
         $subcontextattempt2 = [
             get_string('myattempts', 'mod_h5pactivity'),
             get_string('attempt', 'mod_h5pactivity'). " 2"
         ];
-        $data = $writer->get_data($subcontextattempt2);
+        $data = (array)$writer->get_data($subcontextattempt2);
         $this->assertCount(3, (array) reset($data));
         // The student1 has only 1 tracked attempts.
         $subcontextattempt3 = [
             get_string('myattempts', 'mod_h5pactivity'),
             get_string('attempt', 'mod_h5pactivity'). " 3"
         ];
-        $data = $writer->get_data($subcontextattempt3);
+        $data = (array)$writer->get_data($subcontextattempt3);
         $this->assertEmpty($data);
     }
 
diff --git a/mod/scorm/tests/privacy/provider_test.php b/mod/scorm/tests/privacy/provider_test.php
index 7d272d39047..69318090898 100644
--- a/mod/scorm/tests/privacy/provider_test.php
+++ b/mod/scorm/tests/privacy/provider_test.php
@@ -127,14 +127,14 @@ class provider_test extends provider_testcase {
         $data = $writer->get_data([]);
         $this->assertEquals('SCORM1', $data->name);
 
-        $data = $writer->get_data($subcontextattempt1);
-        $this->assertCount(1, (array) $data);
+        $data = (array)$writer->get_data($subcontextattempt1);
+        $this->assertCount(1, $data);
         $this->assertCount(2, (array) reset($data));
         $subcontextattempt2 = [
             get_string('myattempts', 'scorm'),
             get_string('attempt', 'scorm'). " 2"
         ];
-        $data = $writer->get_data($subcontextattempt2);
+        $data = (array)$writer->get_data($subcontextattempt2);
         $this->assertCount(2, (array) reset($data));
         // The student1 has only 2 scoes_track attempts.
         $subcontextattempt3 = [