环信web IM调用查询历史记录传递参数问题

环信web IM调用查询历史记录传递参数问题
url后面ql=select * where timestamp>1403164734226，需要怎么传？
我已经转义了，还是不行，求助~~~
转义后格式如下：
https://a1.easemob.com/****/***/chatmessages?ql=select%20*%20where%20timestamp&gt1473427192599%26limit=100
一直提示：
Response Body: {"error":"query_parse","timestamp":1473513638155,"duration":0,"exception":"org.apache.usergrid.persistence.exceptions.QueryParseException","error_description":"The query cannot be parsed. The token 'timestamp' at column 6 on line 1 cannot be parsed"}