diff --git a/mod/data/field/checkbox/field.class.php b/mod/data/field/checkbox/field.class.php
index b70bd4e6175..17b98b1c3f3 100755
--- a/mod/data/field/checkbox/field.class.php
+++ b/mod/data/field/checkbox/field.class.php
@@ -113,17 +113,18 @@ class data_field_checkbox extends data_field_base {
         }
         return array('checked'=>$selected, 'allrequired'=>$allrequired);
     }
-    
+
     function generate_sql($tablealias, $value) {
         $allrequired = $value['allrequired'];
         $selected    = $value['checked'];
+        $varcharcontent = sql_compare_text("{$tablealias}.content", 255);
 
         if ($selected) {
             $conditions = array();
             foreach ($selected as $sel) {
                 $likesel = str_replace('%', '\%', $sel);
                 $likeselsel = str_replace('_', '\_', $likesel);
-                $conditions[] = "({$tablealias}.fieldid = {$this->field->id} AND ({$tablealias}.content = '$sel'
+                $conditions[] = "({$tablealias}.fieldid = {$this->field->id} AND ($varcharcontent = '$sel'
                                                                                OR {$tablealias}.content LIKE '$likesel##%'
                                                                                OR {$tablealias}.content LIKE '%##$likesel'
                                                                                OR {$tablealias}.content LIKE '%##$likesel##%'))";
@@ -138,7 +139,6 @@ class data_field_checkbox extends data_field_base {
         }
     }
 
-
     function update_content($recordid, $value, $name='') {
         $content = new object();
         $content->fieldid = $this->field->id;
diff --git a/mod/data/field/latlong/field.class.php b/mod/data/field/latlong/field.class.php
index 6da21ee09be..5cbe4e59035 100755
--- a/mod/data/field/latlong/field.class.php
+++ b/mod/data/field/latlong/field.class.php
@@ -93,7 +93,9 @@ class data_field_latlong extends data_field_base {
         $latlong[0] = '';
         $latlong[1] = '';
         $latlong = explode (',', $value, 2);
-        return " ({$tablealias}.fieldid = {$this->field->id} AND {$tablealias}.content = '$latlong[0]' AND {$tablealias}.content1 = '$latlong[1]') ";
+        $varcharlat = sql_compare_text("{$tablealias}.content");
+        $varcharlong= sql_compare_text("{$tablealias}.content1");
+        return " ({$tablealias}.fieldid = {$this->field->id} AND $varcharlat = '$latlong[0]' AND $varcharlong = '$latlong[1]') ";
     }
 
     function display_browse_field($recordid, $template) {
diff --git a/mod/data/field/menu/field.class.php b/mod/data/field/menu/field.class.php
index e2b367e6b9c..7b374e8cdc8 100755
--- a/mod/data/field/menu/field.class.php
+++ b/mod/data/field/menu/field.class.php
@@ -97,7 +97,8 @@ class data_field_menu extends data_field_base {
      }
 
     function generate_sql($tablealias, $value) {
-        return " ({$tablealias}.fieldid = {$this->field->id} AND {$tablealias}.content = '$value') "; 
+        $varcharcontent = sql_compare_text("{$tablealias}.content", 255);
+        return " ({$tablealias}.fieldid = {$this->field->id} AND $varcharcontent = '$value') ";
     }
 
 }
diff --git a/mod/data/field/multimenu/field.class.php b/mod/data/field/multimenu/field.class.php
index d6fcbb26edb..a51a674cd42 100755
--- a/mod/data/field/multimenu/field.class.php
+++ b/mod/data/field/multimenu/field.class.php
@@ -140,13 +140,14 @@ class data_field_multimenu extends data_field_base {
     function generate_sql($tablealias, $value) {
         $allrequired = $value['allrequired'];
         $selected    = $value['selected'];
+        $varcharcontent = sql_compare_text("{$tablealias}.content", 255);
 
         if ($selected) {
             $conditions = array();
             foreach ($selected as $sel) {
                 $likesel = str_replace('%', '\%', $sel);
                 $likeselsel = str_replace('_', '\_', $likesel);
-                $conditions[] = "({$tablealias}.fieldid = {$this->field->id} AND ({$tablealias}.content = '$sel'
+                $conditions[] = "({$tablealias}.fieldid = {$this->field->id} AND ($varcharcontent = '$sel'
                                                                                OR {$tablealias}.content LIKE '$likesel##%'
                                                                                OR {$tablealias}.content LIKE '%##$likesel'
                                                                                OR {$tablealias}.content LIKE '%##$likesel##%'))";
diff --git a/mod/data/field/number/field.class.php b/mod/data/field/number/field.class.php
index 371d725ca5a..eb165048dd8 100755
--- a/mod/data/field/number/field.class.php
+++ b/mod/data/field/number/field.class.php
@@ -76,10 +76,10 @@ class data_field_number extends data_field_base {
     function parse_search_field() {
         return optional_param('f_'.$this->field->id, '', PARAM_NOTAGS);
     }
-    
-    // need to cast?
+
     function generate_sql($tablealias, $value) {
-        return " ({$tablealias}.fieldid = {$this->field->id} AND {$tablealias}.content = '$value') ";
+        $varcharcontent = sql_compare_text("{$tablealias}.content");
+        return " ({$tablealias}.fieldid = {$this->field->id} AND $varcharcontent = '$value') ";
     }
 
     function get_sort_sql($fieldname) {
diff --git a/mod/data/field/radiobutton/field.class.php b/mod/data/field/radiobutton/field.class.php
index 04b685233e3..6cfda5e57c8 100755
--- a/mod/data/field/radiobutton/field.class.php
+++ b/mod/data/field/radiobutton/field.class.php
@@ -91,7 +91,8 @@ class data_field_radiobutton extends data_field_base {
     }
 
     function generate_sql($tablealias, $value) {
-        return " ({$tablealias}.fieldid = {$this->field->id} AND {$tablealias}.content = '$value') ";
+        $varcharcontent = sql_compare_text("{$tablealias}.content", 255);
+        return " ({$tablealias}.fieldid = {$this->field->id} AND $varcharcontent = '$value') ";
     }
 
 }
diff --git a/mod/data/field/text/field.class.php b/mod/data/field/text/field.class.php
index ba13558a5f5..248d2b4791c 100755
--- a/mod/data/field/text/field.class.php
+++ b/mod/data/field/text/field.class.php
@@ -29,19 +29,19 @@ class data_field_text extends data_field_base {
     function data_field_text($field=0, $data=0) {
         parent::data_field_base($field, $data);
     }
-    
+
     function display_search_field($value = '') {
-        return '<input type="text" size="16" name="f_'.$this->field->id.'" value="'.$value.'" />';   
+        return '<input type="text" size="16" name="f_'.$this->field->id.'" value="'.$value.'" />';
     }
-    
+
     function parse_search_field() {
         return optional_param('f_'.$this->field->id, '', PARAM_NOTAGS);
     }
-    
+
     function generate_sql($tablealias, $value) {
-        return " ({$tablealias}.fieldid = {$this->field->id} AND {$tablealias}.content LIKE '%{$value}%') "; 
+        return " ({$tablealias}.fieldid = {$this->field->id} AND {$tablealias}.content LIKE '%{$value}%') ";
     }
-    
+
 }
 
 ?>
diff --git a/mod/data/field/textarea/field.class.php b/mod/data/field/textarea/field.class.php
index 9d22247a4f7..7ebf19c06ba 100755
--- a/mod/data/field/textarea/field.class.php
+++ b/mod/data/field/textarea/field.class.php
@@ -68,20 +68,20 @@ class data_field_textarea extends data_field_base {
         $str .= '</div>';
         return $str;
     }
-    
-    
+
+
     function display_search_field($value = '') {
-        return '<input type="text" size="16" name="f_'.$this->field->id.'" value="'.$value.'" />';   
+        return '<input type="text" size="16" name="f_'.$this->field->id.'" value="'.$value.'" />';
     }
-    
+
     function parse_search_field() {
         return optional_param('f_'.$this->field->id, '', PARAM_NOTAGS);
     }
-    
+
     function generate_sql($tablealias, $value) {
-        return " ({$tablealias}.fieldid = {$this->field->id} AND {$tablealias}.content LIKE '%{$value}%') "; 
+        return " ({$tablealias}.fieldid = {$this->field->id} AND {$tablealias}.content LIKE '%{$value}%') ";
     }
-    
+
     function gen_textarea($usehtmleditor, $text='') {
         // MDL-16018: Don't print htmlarea with < 7 lines height, causes visualization problem
         $text = clean_text($text);