Function processTernary

query/math.go:211–248

processTernary handles the ternary operand cond()

(mNode *mathTree)

// processTernary handles the ternary operand cond()
func processTernary(mNode *mathTree) error {
	destMap := types.NewShardedMap()
	aggName := mNode.Fn
	condMap := mNode.Child[0].Val
	if condMap.IsEmpty() {
		return errors.Errorf("Expected a value variable in %v but missing.", aggName)
	}
	varOne := mNode.Child[1].Val
	varTwo := mNode.Child[2].Val
	constOne := mNode.Child[1].Const
	constTwo := mNode.Child[2].Const
	condMap.Iterate(func(k uint64, val types.Val) error {
		var res types.Val
		v, ok := val.Value.(bool)
		if !ok {
			return errors.Errorf("First variable of conditional function not a bool value")
		}
		if v {
			// Pick the value of first map.
			if constOne.Value != nil {
				res = constOne
			} else {
				res, _ = varOne.Get(k)
			}
		} else {
			// Pick the value of second map.
			if constTwo.Value != nil {
				res = constTwo
			} else {
				res, _ = varTwo.Get(k)
			}
		}
		destMap.Set(k, res)
		return nil
	})
	mNode.Val = destMap
	return nil
}

func evalMathTree(mNode *mathTree) error {
	if mNode.Const.Value != nil {