impl: subclass stub and their arginfo

Author: KentarouTakeda

ext/pdo_pgsql/pdo_pgsql.stub.php

@@ -11,6 +11,11 @@ class PdoPgsql extends PDO
     /** @cvalue PDO_PGSQL_ATTR_DISABLE_PREPARES */
     public const int ATTR_DISABLE_PREPARES = UNKNOWN;
 
+#ifdef HAVE_PG_RESULT_MEMORY_SIZE
+    /** @cvalue PDO_PGSQL_ATTR_RESULT_MEMORY_SIZE */
+    public const int ATTR_RESULT_MEMORY_SIZE = UNKNOWN;
+#endif
+
     /** @cvalue PGSQL_TRANSACTION_IDLE */
     public const int TRANSACTION_IDLE = UNKNOWN;