Added sql_ceil() helper function. MDL-15336

lib/dmllib.php

@@ -2160,6 +2160,23 @@ function sql_null_from_clause() {
     }
 }
 
+/**
+ * Returns the correct CEIL expression applied to fieldname
+ * @param string fieldname the field (or expression) we are going to ceil
+ * @return string the piece of SQL code to be used in your ceiling statement
+ */
+function sql_ceil($fieldname) {
+    global $CFG;
+
+    switch ($CFG->dbfamily) {
+        case 'mssql':
+            return ' CEILING(' . $fieldname . ')';
+            break;
+        default:
+            return ' CEIL(' . $fieldname . ')';
+    }
+}
+
 /**
  * Prepare a SQL WHERE clause to select records where the given fields match the given values.
  *