Date filter is not working on SDP

Content

Hello Team,

We are calling external REST service. And on SDP we are applying date filter, it is not applying. However, it is working on String.

{
 "op": "$and",
 "criteria": [
  {
   "op": "$ge",
   "attribute": "EffectiveDate",
   "value": "2020-07-30"
  },
  {
   "op": "$eq",
   "attribute": "RecordSet",
   "value": "MYOPTIES"
  }
 ]
}

error: 

Query expression uses unavailable search operator. Attribute: EffectiveDate; Expression:  = '2020-07-30'

could you kindly help me out


Thanks much in advance!!