Method PostprocessAsHLLData

query/aql_postprocessor.go:165–183

PostprocessAsHLLData serializes the query result into HLLData format. It will also release the device memory after serialization.

()

// PostprocessAsHLLData serializes the query result into HLLData format. It will also release the device memory after
// serialization.
func (qc *AQLQueryContext) PostprocessAsHLLData() ([]byte, error) {
	oopkContext := qc.OOPK
	if oopkContext.ResultSize == 0 {
		return []byte{}, nil
	}

	dataTypes := make([]memCom.DataType, len(oopkContext.Dimensions))
	reverseDicts := make(map[int][]string)

	var timeDimensions []int
	for dimIndex, ast := range oopkContext.Dimensions {
		dataTypes[dimIndex], reverseDicts[dimIndex] = queryCom.GetDimensionDataType(ast), qc.getEnumReverseDict(dimIndex, ast)
		if qc.Query.Dimensions[dimIndex].IsTimeDimension() {
			timeDimensions = append(timeDimensions, dimIndex)
		}
	}

	return qc.SerializeHLL(dataTypes, reverseDicts, timeDimensions)
}

// getEnumReverseDict returns the enum reverse dict of a ast node if it's a VarRef node, otherwise it will return
// a nil slice.