filter on specific date without caring about min/sec

what is a good way to filter on specific date? I am storing data as full date format with timezone like 2018-08-06T14:21:54+02:00 and I am trying to query for specific day like: 2018-08-06 There are only few functionalities available for Date field and none support something like includes. Any suggestion?

ps: I know one solution would be making a function/store procedure in Postgres and then call it in the graphql but that is quite limited.

[benjie]

Personally I’d stick with the “greaterThanOrEqualTo” / “lessThan” combo - it’s more flexible and more explicit. All my databases use UTC. I’m not comfortable exposing a “like” operator - serious performance/DOS issues there; beginsWith would be better.

[mattbretl]

You’re right. Currently you’d have to write something like:

query {
  allFoos (filter: {
    bar: {
      greaterThanOrEqualTo: "2018-08-06",
      lessThan: "2018-08-07"
    }
  }) {
    nodes {
      bar
    }
  }
}

I can think of a few approaches:

1. Expose the existing like operator, which would translate { bar: { like: "2018-08-06%" } } to a where clause of bar::text LIKE '2018-08-06%'. This would be also support queries on year, year-month, year-month-day-hour, etc.

2. Create a new dateEqualTo operator, which would translate { bar: { dateEqualTo: "2018-08-06" } } to a where clause of bar::date = '2018-08-06'. This would likely be more performant, especially with an expression index.

@benjie, any thoughts?