diff --git a/js/tbl_select.js b/js/tbl_select.js
index f04b4e3553..ec274dc5aa 100644
--- a/js/tbl_select.js
+++ b/js/tbl_select.js
@@ -42,6 +42,12 @@ $(function() {
      * (see $GLOBALS['cfg']['AjaxEnable'])
      */
     $("#tbl_search_form.ajax").live('submit', function(event) {
+        var unaryFunctions = [
+            'IS NULL', 
+            'IS NOT NULL',
+            "= ''",
+            "!= ''"];
+            
         // jQuery object to reuse
         $search_form = $(this);
         event.preventDefault();
@@ -64,8 +70,12 @@ $(function() {
             }
         });
         var columnCount = $('select[name="columnsToDisplay[]"] option').length;
-        // Submit values only for the columns that have a search criteria
+        // Submit values only for the columns that have unary column operator or a search criteria 
         for (var a = 0; a < columnCount; a++) {
+            if ($.inArray(values['criteriaColumnOperators[' + a + ']'], unaryFunctions) >= 0) {
+                continue;
+            }
+            
             if (values['criteriaValues[' + a + ']'] == '') {
                 delete values['criteriaValues[' + a + ']'];
                 delete values['criteriaColumnOperators[' + a + ']'];
diff --git a/libraries/TableSearch.class.php b/libraries/TableSearch.class.php
index 7de43e5fd5..4bc802e968 100644
--- a/libraries/TableSearch.class.php
+++ b/libraries/TableSearch.class.php
@@ -656,8 +656,9 @@ EOT;
             return $fullWhereClause;
         }
 
-        // If there are no search criteria set, return
-        if (! array_filter($_POST['criteriaValues'])) {
+        // If there are no search criteria set or no unary criteria operators, return
+        if (! array_filter($_POST['criteriaValues']) 
+            && ! array_intersect($_POST['criteriaColumnOperators'], $GLOBALS['PMA_Types']->getUnaryOperators())) {
             return $fullWhereClause;
         }