diff --git a/src/Addiks/PHPSQL/PDO/Statement.php b/src/Addiks/PHPSQL/PDO/Statement.php
index cdf9b16..c44dfc6 100644
--- a/src/Addiks/PHPSQL/PDO/Statement.php
+++ b/src/Addiks/PHPSQL/PDO/Statement.php
@@ -426,7 +426,7 @@ public function fetchAll($fetchStyle = \PDO::FETCH_BOTH)
     public function fetchColumn($columnIndex = 0)
     {
 
-        $row = $this->fetch(Code::FETCH_NUM);
+        $row = $this->fetch(\PDO::FETCH_NUM);
 
         return $row[(int)$columnIndex];
     }
diff --git a/src/Addiks/PHPSQL/Table/TableManager.php b/src/Addiks/PHPSQL/Table/TableManager.php
index c30b97e..5fa83ab 100644
--- a/src/Addiks/PHPSQL/Table/TableManager.php
+++ b/src/Addiks/PHPSQL/Table/TableManager.php
@@ -29,6 +29,7 @@
 use Addiks\PHPSQL\Table\TableFactoryInterface;
 use Addiks\PHPSQL\Column\ColumnDataFactoryInterface;
 use Addiks\PHPSQL\Index\IndexFactory;
+use InvalidArgumentException;
 
 class TableManager
 {
@@ -73,6 +74,10 @@ public function getTable($tableName, $schemaId = null)
 
             $tableIndex = $databaseSchema->getTableIndex($tableName);
 
+            if (is_null($tableIndex)) {
+                throw new InvalidArgumentException("Table '{$tableName}' does not exist!");
+            }
+
             /* @var $databaseSchemaPage DatabaseSchemaPage */
             $databaseSchemaPage = $databaseSchema->getTablePage($tableIndex, $schemaId);