PDO: support PDO::FETCH_COLUMN in fetch() (#302)

Co-authored-by: Markus Staab <[email protected]>

Author: staabm

src/Extensions/PdoStatementFetchDynamicReturnTypeExtension.php

@@ -78,7 +78,7 @@ private function inferType(MethodReflection $methodReflection, MethodCall $metho
             }
         }
 
-        if ('fetchAll' === $methodReflection->getName() && QueryReflector::FETCH_TYPE_COLUMN === $fetchType) {
+        if (QueryReflector::FETCH_TYPE_COLUMN === $fetchType) {
             $columnIndex = 0;
 
             if (\count($args) > 1) {

tests/default/data/pdo-stmt-fetch.php

@@ -63,6 +63,15 @@ public function fetch(PDO $pdo)
         $all = $stmt->fetch(PDO::FETCH_ASSOC);
         assertType('array{email: string, adaid: int<0, 4294967295>}|false', $all);
 
+        $all = $stmt->fetch(PDO::FETCH_COLUMN);
+        assertType('string|false', $all);
+
+        $all = $stmt->fetch(PDO::FETCH_COLUMN, 0);
+        assertType('string|false', $all);
+
+        $all = $stmt->fetch(PDO::FETCH_COLUMN, 1);
+        assertType('int<0, 4294967295>|false', $all);
+
         // not yet supported fetch types
         $all = $stmt->fetch(PDO::FETCH_OBJ);
         assertType('mixed', $all);