From de09e4e4455bb70a5149ee6465a7d65f6f179e2c Mon Sep 17 00:00:00 2001
From: stronk7 <stronk7>
Date: Mon, 21 Apr 2008 18:12:01 +0000
Subject: [PATCH] Replace custom casting code by proper sql_cast_char2int()
 core function. MDL-12893 ; backported from HEAD

---
 mod/data/field/date/field.class.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mod/data/field/date/field.class.php b/mod/data/field/date/field.class.php
index 9717faec041..1a92a12a593 100755
--- a/mod/data/field/date/field.class.php
+++ b/mod/data/field/date/field.class.php
@@ -83,7 +83,8 @@ class data_field_date extends data_field_base {
     }
 
     function get_sort_sql($fieldname) {
-        return 'CAST('.$fieldname.' AS unsigned)';
+
+         return sql_cast_char2int($fieldname, true);
     }