FIX Clear table logic for MySQL 8

src/ORM/Connect/MySQLDatabase.php

@@ -566,6 +566,35 @@ public function random()
      */
     public function clearTable($table)
     {
-        $this->query("TRUNCATE TABLE \"$table\"");
+        // Not simply using "TRUNCATE TABLE \"$table\"" because DELETE is a lot quicker
+        // than TRUNCATE which is very relevant during unit testing. Using TRUNCATE will lead to an
+        // approximately 50% increase it the total time of running unit tests.
+        $self = $this;
+        $fn = function () use ($self, $table) {
+            $this->query("DELETE FROM \"$table\"");
+            // Check if resetting the auto-increment is needed
+            // Note that ALTER TABLE is an expensive operation so only do it if necessary
+            $autoIncrement = $self->preparedQuery(
+                'SELECT "AUTO_INCREMENT" FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = ? AND TABLE_NAME = ?',
+                [ $this->getSelectedDatabase(), $table]
+            )->value();   
+            if ($autoIncrement > 1) {
+                $self->query("ALTER TABLE \"$table\" AUTO_INCREMENT = 1");
+            }
+        };
+        if ($this->supportsTransactions()) {
+            // Wrap in a transaction because MySQL will use always use `max(ID) + 1` as a
+            // minimum value for auto-increment
+            // In MySQL 8, there were issues where the auto-increment was sometimes being reset to 2,
+            // presumbably due to some sort of timing issue
+            $this->withTransaction($fn);
+        } else {
+            $fn();
+        }
+    }
+
+    private function clearTableInner($table)
+    {
+
     }
 }