explicitly display mysqli error

src/Adapter/Driver/Mysqli/Statement.php

@@ -206,7 +206,10 @@ public function prepare($sql = null)
         $this->resource = $this->mysqli->prepare($sql);
         if (!$this->resource instanceof \mysqli_stmt) {
             throw new Exception\InvalidQueryException(
-                'Statement couldn\'t be produced with sql: ' . $sql,
+                sprintf(
+                    ' Error #%d: %s. Statement couldn\'t be produced with sql: %s', 
+                    $this->mysqli->errno, $this->mysqli->error, $sql
+                ),
                 null,
                 new Exception\ErrorException($this->mysqli->error, $this->mysqli->errno)
             );