Couchbase - SELECT a subset of fields from array of objects - couchbase

Question

I am using the travel-sample data set, and am running the following query:
SELECT id, schedule FROM `travel-sample`WHERE type = "route" LIMIT 1;
It is returning with the following results:
[
{
"id": 10000,
"schedule": [
{
"day": 0,
"flight": "AF198",
"utc": "10:13:00"
},
{
"day": 0,
"flight": "AF547",
"utc": "19:14:00"
},
...
]
}
]
However, I don't want to return the schedule.$.day field; i.e. I want my results to be:
[
{
"id": 10000,
"schedule": [
{
"flight": "AF198",
"utc": "10:13:00"
},
{
"flight": "AF547",
"utc": "19:14:00"
},
...
]
}
]
How can I SELECT only a subset of object fields from an array of objects?
I have tried UNNEST but I don't want to have a separate record for each schedule element - I want the schedule elements to remain nested inside the document.
I have also tried using OBJECT_REMOVE
SELECT id, ARRAY OBJECT_REMOVE(x, 'day') FOR x in schedule END AS schedule FROM `travel-sample` WHERE type = "route" LIMIT 1;
But I want to whitelist rather than blacklist fields.

Answer 1

Your last attempt was close. Instead of using OBJECT_REMOVE, you can simply construct the object you want returned.
SELECT id, ARRAY {"flight": x.flight, "utc": x.utc} FOR x in schedule END AS schedule FROM `travel-sample` WHERE type = "route" LIMIT 1;
You will get the following results:
[
{
"id": 10000,
"schedule": [
{
"flight": "AF198",
"utc": "10:13:00"
},
{
"flight": "AF547",
"utc": "19:14:00"
},
...
]
}
]