diff --git a/lib/lexer.js b/lib/lexer.js
index 3f0ed9c..f41f7be 100644
--- a/lib/lexer.js
+++ b/lib/lexer.js
@@ -204,7 +204,7 @@
 
     SQL_SORT_ORDERS = ['ASC', 'DESC'];
 
-    SQL_OPERATORS = ['=', '!=', '>=', '>', '<=', '<>', '<', 'LIKE', 'IS NOT', 'IS'];
+    SQL_OPERATORS = ['=', '!=', '>=', '>', '<=', '<>', '<', 'LIKE', 'IS NOT', 'IS', 'CONTAINS', 'STARTS WITH', 'ENDS WITH'];
 
     SUB_SELECT_OP = ['IN', 'NOT IN', 'ANY', 'ALL', 'SOME'];