diff --git a/CRM/Contact/BAO/Query.php b/CRM/Contact/BAO/Query.php
index 6e73904a0c9e..8138278a0bfd 100644
--- a/CRM/Contact/BAO/Query.php
+++ b/CRM/Contact/BAO/Query.php
@@ -4200,7 +4200,10 @@ public function relationship(&$values) {
     $relationshipTempTable = NULL;
     if (self::$_relType == 'reciprocal') {
       $where = [];
-      self::$_relationshipTempTable = $relationshipTempTable = CRM_Core_DAO::createTempTableName('civicrm_rel');
+      self::$_relationshipTempTable = $relationshipTempTable = CRM_Utils_SQL_TempTable::build()
+        ->setCategory('civicrm_rel')
+        ->createWithColumns("`contact_id` int(10) unsigned NOT NULL DEFAULT '0'", "`contact_id_alt` int(10) unsigned NOT NULL DEFAULT '0'", "KEY `contact_id` (`contact_id`)", "KEY `contact_id_alt` (`contact_id_alt`)")
+        ->getName();
       if ($nameClause) {
         $where[$grouping][] = " sort_name $nameClause ";
       }
@@ -4323,13 +4326,7 @@ public function relationship(&$values) {
         $whereClause = str_replace('contact_b', 'c', $whereClause);
       }
       $sql = "
-        CREATE TEMPORARY TABLE {$relationshipTempTable}
-          (
-            `contact_id` int(10) unsigned NOT NULL DEFAULT '0',
-            `contact_id_alt` int(10) unsigned NOT NULL DEFAULT '0',
-            KEY `contact_id` (`contact_id`),
-            KEY `contact_id_alt` (`contact_id_alt`)
-          )
+        INSERT INTO {$relationshipTempTable} (contact_id, contact_id_alt)
           (SELECT contact_id_b as contact_id, contact_id_a as contact_id_alt, civicrm_relationship.id
             FROM civicrm_relationship
             INNER JOIN  civicrm_contact c ON civicrm_relationship.contact_id_a = c.id
diff --git a/CRM/Core/DAO.php b/CRM/Core/DAO.php
index e5971188cba7..72714e73ec21 100644
--- a/CRM/Core/DAO.php
+++ b/CRM/Core/DAO.php
@@ -2128,6 +2128,7 @@ public static function setCreateDefaults(&$params, $defaults) {
    * @see CRM_Utils_SQL_TempTable
    */
   public static function createTempTableName($prefix = 'civicrm', $addRandomString = TRUE, $string = NULL) {
+    CRM_Core_Error::deprecatedFunctionWarning('Use CRM_Utils_SQL_TempTable interface to create temporary tables');
     $tableName = $prefix . "_temp";
 
     if ($addRandomString) {
diff --git a/CRM/Utils/SQL/TempTable.php b/CRM/Utils/SQL/TempTable.php
index fee6fdfdfc4d..d637e16af4e0 100644
--- a/CRM/Utils/SQL/TempTable.php
+++ b/CRM/Utils/SQL/TempTable.php
@@ -75,6 +75,7 @@ class CRM_Utils_SQL_TempTable {
   const ID_REGEXP = ';^[a-zA-Z0-9_]+$;';
   const INNODB = 'ENGINE=InnoDB';
   const MEMORY = 'ENGINE=MEMORY';
+  const MYISAM = 'ENGINE=MYISAM';
 
   /**
    * @var bool
@@ -96,6 +97,8 @@ class CRM_Utils_SQL_TempTable {
 
   protected $createSql;
 
+  protected $myisam;
+
   /**
    * @return CRM_Utils_SQL_TempTable
    */
@@ -108,6 +111,7 @@ public static function build() {
     $t->utf8 = TRUE;
     $t->autodrop = FALSE;
     $t->memory = FALSE;
+    $t->myisam = FALSE;
     return $t;
   }
 
@@ -315,6 +319,21 @@ public function setMemory($value = TRUE) {
     return $this;
   }
 
+  /**
+   * Set table engine to MEMORY.
+   *
+   * @param bool $value
+   *
+   * @return $this
+   */
+  public function setMyisam($value = TRUE) {
+    if (CIVICRM_UF !== 'UnitTests') {
+      throw new \CRM_Core_Exception(ts('MySIAM Engine temporary tables can only be set within unit tests'));
+    }
+    $this->myisam = $value;
+    return $this;
+  }
+
   /**
    * Set table collation to UTF8.
    *
diff --git a/tests/phpunit/CRM/Core/DAOTest.php b/tests/phpunit/CRM/Core/DAOTest.php
index 32e8e38babb3..f2be3339d229 100644
--- a/tests/phpunit/CRM/Core/DAOTest.php
+++ b/tests/phpunit/CRM/Core/DAOTest.php
@@ -296,21 +296,14 @@ public function testMyISAMCheck() {
     $this->assertEquals(1, CRM_Core_DAO::isDBMyISAM());
     CRM_Core_DAO::executeQuery('DROP TABLE civicrm_my_isam');
 
-    // A temp table should not raise flag (static naming).
-    $tempName = CRM_Core_DAO::createTempTableName('civicrm', FALSE);
-    $this->assertEquals(0, CRM_Core_DAO::isDBMyISAM());
-    CRM_Core_DAO::executeQuery("CREATE TABLE $tempName (`id` int(10) unsigned NOT NULL) ENGINE = MyISAM");
-    // Ignore temp tables
-    $this->assertEquals(0, CRM_Core_DAO::isDBMyISAM());
-    CRM_Core_DAO::executeQuery("DROP TABLE $tempName");
-
+    // A temp table should not raise flag.
+    $tempTableName = CRM_Utils_SQL_TempTable::build()->setCategory('myisam')->setMyisam()->getName();
     // A temp table should not raise flag (randomized naming).
-    $tempName = CRM_Core_DAO::createTempTableName('civicrm', TRUE);
     $this->assertEquals(0, CRM_Core_DAO::isDBMyISAM());
-    CRM_Core_DAO::executeQuery("CREATE TABLE $tempName (`id` int(10) unsigned NOT NULL) ENGINE = MyISAM");
+    CRM_Core_DAO::executeQuery("CREATE TABLE $tempTableName (`id` int(10) unsigned NOT NULL) ENGINE = MyISAM");
     // Ignore temp tables
     $this->assertEquals(0, CRM_Core_DAO::isDBMyISAM());
-    CRM_Core_DAO::executeQuery("DROP TABLE $tempName");
+    CRM_Core_DAO::executeQuery("DROP TABLE $tempTableName");
   }
 
   /**