diff --git a/lib/dml/pgsql_native_moodle_database.php b/lib/dml/pgsql_native_moodle_database.php
index 030e9543a6b..4f82edaca7e 100644
--- a/lib/dml/pgsql_native_moodle_database.php
+++ b/lib/dml/pgsql_native_moodle_database.php
@@ -623,6 +623,9 @@ class pgsql_native_moodle_database extends moodle_database {
         if ($limitfrom or $limitnum) {
             if ($limitnum < 1) {
                 $limitnum = "ALL";
+            } else if (PHP_INT_MAX - $limitnum < $limitfrom) {
+                // this is a workaround for weird max int problem
+                $limitnum = "ALL";
             }
             $sql .= " LIMIT $limitnum OFFSET $limitfrom";
         }
@@ -662,6 +665,9 @@ class pgsql_native_moodle_database extends moodle_database {
         if ($limitfrom or $limitnum) {
             if ($limitnum < 1) {
                 $limitnum = "ALL";
+            } else if (PHP_INT_MAX - $limitnum < $limitfrom) {
+                // this is a workaround for weird max int problem
+                $limitnum = "ALL";
             }
             $sql .= " LIMIT $limitnum OFFSET $limitfrom";
         }