Populating a dynamic Operator(greater than,less than ,equal,etc..)

Hi all,

i have two question 

1.can we select the dynamic operator : 

         for eg : if(1 ri!operator 2,"if true","if false")

              where operator will belike {">=","<","=",etc..} . which user select from site

2. can apply a query filter on an aggregated column 

eg: 

a!query(
    aggregation:
    a!queryAggregation(
      aggregationColumns: 
      {
        a!queryAggregationColumn(
          field: "zipcode",
          isGrouping: true
        ),
        a!queryAggregationColumn(
          field: "caseId",
          alias: "caseId_count",
          aggregationFunction: "COUNT"
        )
      }
    ),
    logicalexpression: a!queryLogicalExpression(
      operator: "AND",
      filters: {
        a!queryFilter(
          field: "caseId_count",
          operator: "<",
          value: 3
        )
      },
      ignoreFiltersWithEmptyValues: true
    )