cannot compare string with date format

[imqishi]

exp, _ := govaluate.NewEvaluableExpression("create_time >= '2023-04-03 00:00:00'")
ret, err := exp.Evaluate(map[string]interface{}{
    "create_time": "2023-04-04 00:00:00",
})
fmt.Println(ret, err)

return
<nil> Value '2023-04-04 00:00:00' cannot be used with the comparator '>=', it is not a number

but if replace create_time with string '2023-04-04 00:00:00' is ok, so is the only way to make it by trans string-date to timestamp then compare integers?

---

well, I see this may solve this: https://github.com/Knetic/govaluate/pull/87/files/38d806c0a2f11d7be7da7752361f6850f9fd824d

but still have one question, why time-format string will be parsed to float64 not int64?