add >= <= mysql where encoding

plugins/emysql/src/emysql.erl

@@ -384,9 +384,15 @@ encode_where({like, Field, Value}) ->
 encode_where({'<', Field, Value}) ->	
 	atom_to_list(Field) ++ " < " ++ encode(Value);
 
+encode_where({'<=', Field, Value}) ->
+	atom_to_list(Field) ++ " <= " ++ encode(Value);
+
 encode_where({'>', Field, Value}) ->	
 	atom_to_list(Field) ++ " > " ++ encode(Value);
 
+encode_where({'>=', Field, Value}) ->
+	atom_to_list(Field) ++ " >= " ++ encode(Value);
+
 encode_where({'in', Field, Values}) ->	
 	InStr = string:join([encode(Value) || Value <- Values], ","),
 	atom_to_list(Field) ++ " in (" ++ InStr ++ ")";