Cosmos DB SQL API query for children of nested objects - azure-cosmosdb

I would like to find a better way to search for if documents in a collection have a property with more than 0 elements in the array, i.e. anything that isn't empty.
such as: select * from c where c.property = 'x' and array_length(c.child) > 0 and array_length(c.child.grandchild) > 0
The first arraylength works. Adding the second with just this dot notation doesn't work as I read somewhere else. How can I ensure that I can accomplish this. The grandchild will be anywhere from 0 to many number where it has a greater array length than 0.
Please let me know if more clarification is needed.


Please use below sql :
SELECT distinct c.id,c.name,c.child FROM c
join child in c.child
where array_length(c.child) > 0
and array_length(child.grandchild) > 0
My sample documents:
[
{
"id": "1",
"name": "Jay",
"child": [
{
"name": "A",
"grandchild": [
{
"name": "A1"
},
{
"name": "A2"
}
]
},
{
"name": "B",
"grandchild": [
{
"name": "B1"
},
{
"name": "B2"
}
]
}
]
},
{
"id": "2",
"name": "Tom",
"child": [
{
"name": "A",
"grandchild": []
},
{
"name": "B",
"grandchild": []
}
]
}
]
Hope it helps you.

Related

How can I spread array elements in parent object by jq?

I want to transform following type of json obj
[
{
"A": "a",
"Tags": [
{ "key":"x", "value":0},
{ "key":"y", "value":1},
]
},
{...}
]
to this, including Tags list on top
[
{
"A": "a",
"x": 0,
"y": 1
},
{...}
]
I try to use JQ but without result.

map(. + (.Tags | from_entries) | del(.Tags))
Will map() over all the objects in the array and:
Convert .Tags to an object using from_entries
This is added to the original object (. + ())
Delete the original .Tags
Output:
[
{
"A": "a",
"x": 0,
"y": 1
}
]
Online Demo

Is there a way to transform these 2 arrays by using jq, into a set of objects, like in the example down below?

Example json data:
{
"data": [
{
"place": "FM346",
"id": [
"7_day_A",
"7_day_B",
"7_day_C",
"7_day_D"
],
"values": [
0,
30,
23,
43
]
},
{
"place": "LH210",
"id": [
"1_day_A",
"1_day_B",
"1_day_C",
"1_day_D"
],
"values": [
4,
45,
100,
9
]
}
]
}
what i need to transform it into:
{
"data": [
{
"place": "FM346",
"7_day_A": {
"value": 0
},
"7_day_B": {
"value": 30
},
"7_day_C": {
"value": 23
},
"7_day_D": {
"value": 43
}
},
{
"place": "LH210",
"1_day_A": {
"value": 4
},
"1_day_B": {
"value": 45
},
"1_day_C": {
"value": 100
},
"1_day_D": {
"value": 9
}
}
]
}
i have tried this:
{
data:[.data |.[]|
{
place: (.place),
(.id[]):
{
value: (.values[])
}
}]
}
(in jqplay: https://jqplay.org/s/f4BBtN9gwmp)
and this:
{
data:[.data |.[]|
{
place: (.place),
test:
[{
(.id[]):
{
value: (.values[])
}
}]
}]
}
(in jqplay: https://jqplay.org/s/pKIvQe1CzgX)
but they arent grouped in the way i wanted and it gives each value to each id, not the corresponding one.
I have been trying for some time now, but im new to jq and have no idea how to transform it this way, thanks in advance for any answers.

You can use transpose here, which can play a key role in converting the arrays to key/value pairs
.data[] |= {place} +
([ .id, .values ] | transpose | map({(.[0]): { value: .[1] } }) | add)
The solution works by converting the array-of-arrays [.id, .values] by transposing them, i.e. converting
[["7_day_A","7_day_B","7_day_C","7_day_D"],[0,30,23,43]]
[["1_day_A","1_day_B","1_day_C","1_day_D"],[4,45,100,9]]
to
[["7_day_A",0],["7_day_B",30],["7_day_C",23],["7_day_D",43]]
[["1_day_A",4],["1_day_B",45],["1_day_C",100],["1_day_D",9]]
With the transformation done, we construct an object with key as the zeroth index element and value as an object comprising of the value of first index element, and combine the results together with add
Demo - jqplay

Best way to retrieve document with nested JSON and limit

Suppose we have a structure:
{
"nested_items": [
{
"nested_sample0": "1",
"nested_sample1": "test",
"nested_sample2": "test",
"nested_sample3": {
"type": "type"
},
"nested_sample": null
},
{
"nested_sample0": "1",
"nested_sample1": "test",
"nested_sample2": "test",
"nested_sample3": {
"type": "type"
},
"nested_sample1": null
},
...
],
"sample1": 1233,
"id": "ed68ca34-6b59-4687-a557-bdefc9ec2f4b",
"sample2": "",
"sample3": "test",
"sample4": "test",
"_ts": 1656503348
}
I want to retrieve documents by id by with limit of "nested_items" field .As I know limit and offset not supported in sub queries. Any way to do this except of divide into two queries? Maybe some udf or else?

You can use the function ARRAY_SLICE assuming the array is ordered.
Example data:
{
"name": "John",
"details": [
{
"id": 1
},
{
"id": 2
},
{
"id": 3
}
]
}
Example queries
-- First 2 items from nested array
SELECT c.name, ARRAY_SLICE(c.details, 0, 2) as details
FROM c
-- Last 2 items from nested array
SELECT c.name, ARRAY_SLICE(c.details, ARRAY_LENGTH(c.details) - 2, 2) as details
FROM c

how to use a join in cosmos db to get result

I have below structure
{
"SubscriberId": "a4db02c1-f41b-4ab1-9f3e-83f9a7ccde83",
"Subscription": {
"Type": "Member",
"MaxUsers": "200",
"StartDate": "2018-07-01T00:00:00.0000000Z",
"EndDate": "2019-07-31T00:00:00.0000000Z",
"Families": [
{
"Id": "4042e5dc-ff0e-5cca-d5ee-d96c4522f1db",
"Products": [
{
"Id": "e9313211-ca18-4776-8fea-1d552b6f40d6",
"Price": null
},
{
"Id": "bf3cdaa4-8cbe-42e6-8f6f-20c1210dc4ac",
"Price": null
}
]
}
],
"IsActive": "true"
}
}
so I want to get data in the below structure, how can I use sql to do this?
SubscriberID , Type,Families.Id,Families.Products.Id, Families.Products.Price

Please use sql:
select distinct c.SubscriberId,c.Subscription.Type as Type,
f.Id as FamiliesId,p.Id as ProductsId,p.Price as ProductsPrice
from c
join f in c.Subscription.Families
join p in f.Products
Result:

Filtering objects in jq by existence of nested array values

Given a document like this:
[
{
"KVs" : [
{
"Key": "animal",
"Value": "lion"
},
{
"Key": "mascot",
"Value": "lion"
}
],
"name": "roger"
},
{
"KVs" : [
{
"Key": "animal",
"Value": "zebra"
},
{
"Key": "mascot",
"Value": "lion"
}
],
"name": "linda"
}
]
I want to use jq to select only those elements of the top array that contain the KV pair animal == "lion".
The output for the above JSON document should be:
{
"KVs" : [
{
"Key": "animal",
"Value": "lion"
},
{
"Key": "mascot",
"Value": "lion"
}
],
"name": "roger"
}
Can't figure out how to accomplish this with select(). I know how to use it to select based on one specific field. e.g. by key name: .[] | select(.KVs[].Key == "animal"), right? But how do I tell it to match the same KV object on two fields (Key & Value)?

NM, solved it with the help of jqplay and some trial and error.
This is the solution:
.[] | select(.KVs[] | .Key == "animal" and .Value == "lion")
(jqplay permalink)

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