Merge pull request #111 from dhensby/pulls/3/seek-before-iterate

FIX Allow repeat calls to `getIterator()`

code/PostgreSQLQuery.php

@@ -58,6 +58,7 @@ class PostgreSQLQuery extends Query
 
     public function getIterator()
     {
+        pg_result_seek($this->handle, 0);
         while ($data = $this->nextRecord()) {
             yield $data;
         }

composer.json

@@ -15,6 +15,7 @@
         }
     ],
     "require": {
+        "ext-pgsql": "*",
         "silverstripe/framework": "^5",
         "silverstripe/vendor-plugin": "^1.0"
     },