From 0d731aa12e6d9a59e61cebe9c0a7d71025f000f8 Mon Sep 17 00:00:00 2001
From: Oleksandr Shulgin <oleksandr.shulgin@zalando.de>
Date: Tue, 30 Jun 2015 16:34:17 +0200
Subject: [PATCH] Comment on special handling of PGRES_COPY_BOTH

---
 psycopg/pqpath.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/psycopg/pqpath.c b/psycopg/pqpath.c
index 03d928cf..04789d35 100644
--- a/psycopg/pqpath.c
+++ b/psycopg/pqpath.c
@@ -1062,6 +1062,10 @@ pq_get_last_result(connectionObject *conn)
             PQclear(result);
         }
         result = res;
+
+        /* After entering copy both mode, libpq will make a phony
+         * PGresult for us every time we query for it, so we need to
+         * break out of this endless loop. */
         if (PQresultStatus(result) == PGRES_COPY_BOTH) {
             break;
         }