diff --git a/classes/db/queryparts/condition/Condition.class.php b/classes/db/queryparts/condition/Condition.class.php
index 4754fa72b..447ef24fb 100644
--- a/classes/db/queryparts/condition/Condition.class.php
+++ b/classes/db/queryparts/condition/Condition.class.php
@@ -122,13 +122,18 @@ class Condition
 					case 'more' :
 					case 'excess' :
 					case 'less' :
-					case 'below' :
+					case 'below' :
+					case 'gte' :
+					case 'gt' :
+					case 'lte' :
+					case 'lt' :
 					case 'like_tail' :
 					case 'like_prefix' :
 					case 'like' :
 					case 'notlike_tail' :
 					case 'notlike_prefix' :
 					case 'notlike' :
+					case 'not_like' :
 					case 'in' :
 					case 'notin' :
 					case 'not_in' :
@@ -137,6 +142,7 @@ class Condition
 					case 'xor':
 					case 'not':
 					case 'notequal' :
+					case 'not_equal' :
 						// if variable is not set or is not string or number, return
 						if(!isset($this->_value))
 						{
@@ -167,7 +173,8 @@ class Condition
 							break;
 						}
 					case 'null':
-					case 'notnull':
+					case 'notnull':
+					case 'not_null':
 						break;
 					default:
 						// If operation is not one of the above, means the condition is invalid
@@ -190,19 +197,23 @@ class Condition
 
 		switch($operation)
 		{
-			case 'equal' :
+			case 'equal' :
 				return $name . ' = ' . $value;
 				break;
-			case 'more' :
+			case 'more' :
+			case 'gte' :
 				return $name . ' >= ' . $value;
 				break;
-			case 'excess' :
+			case 'excess' :
+			case 'gt' :
 				return $name . ' > ' . $value;
 				break;
-			case 'less' :
+			case 'less' :
+			case 'lte' :
 				return $name . ' <= ' . $value;
 				break;
-			case 'below' :
+			case 'below' :
+			case 'lt' :
 				return $name . ' < ' . $value;
 				break;
 			case 'like_tail' :
@@ -212,6 +223,7 @@ class Condition
 			case 'notlike_tail' :
 			case 'notlike_prefix' :
 			case 'notlike' :
+			case 'not_like' :
 				return $name . ' NOT LIKE ' . $value;
 				break;
 			case 'in' :
@@ -221,10 +233,12 @@ class Condition
 			case 'not_in' :
 				return $name . ' NOT IN ' . $value;
 				break;
-			case 'notequal' :
+			case 'notequal' :
+			case 'not_equal' :
 				return $name . ' <> ' . $value;
 				break;
-			case 'notnull' :
+			case 'notnull' :
+			case 'not_null' :
 				return $name . ' IS NOT NULL ';
 				break;
 			case 'null' :