How do i get id from json with jq? - bash

i have json. How can I get the id whose attributes value is 0fda6bb8-4fc9-4463-9d26-af2d503cb19c ?
[
{
"id": "c3b1516d-5b2c-4838-b5eb-77d94d634832",
"versionId": "c3b1516d-5b2c-4838-b5eb-77d94d634832",
"name": "выписка маленькая заявка с лендинга ИБ",
"entityTypeName": "TestCases",
"projectId": "6dfe2ace-dd40-4e36-b66e-4a655a855a2f",
"sectionId": "bf7fbece-4fdf-466a-b041-2d830debc844",
"isAutomated": false,
"globalId": 264511,
"duration": 300,
"attributes": {
"1be40893-5dad-4b37-b70d-b830c4bd273f": "0fda6bb8-4fc9-4463-9d26-af2d503cb19c",
"f4b408ae-5418-4a8d-99d9-4a67cb34870b": "fa000fb2-375d-4eb5-901c-fb5df30785ad"
},
"createdById": "995b1f08-cc65-409c-aa1c-a16c82dabf1d",
"modifiedById": "995b1f08-cc65-409c-aa1c-a16c82dabf1d",
"createdDate": "2022-10-12T00:22:43.544Z",
"modifiedDate": "2022-10-12T00:22:43.544Z",
"state": "NeedsWork",
"priority": "Medium",
"isDeleted": false,
"tagNames": [
"master"
],
"iterations": []
},
{
"id": "ec423701-f2a8-4667-8459-939a6e079941",
"versionId": "0dfe176e-b172-47ae-8049-e6974086d497",
"name": "[iOS] СБПэй фичатоглы. Fts.SBPay.Settings выключен Fts.C2B.Settings.Subscriptions включен",
"entityTypeName": "TestCases",
"projectId": "6dfe2ace-dd40-4e36-b66e-4a655a855a2f",
"sectionId": "8626c9f5-a5aa-4584-bbca-e9cd60369a5e",
"isAutomated": false,
"globalId": 402437,
"duration": 300,
"attributes": {
"1be40893-5dad-4b37-b70d-b830c4bd273f": "b52bfc88-9b13-41e1-8b4c-098ebfa673e0",
"240b7589-9461-44dc-8b13-361132877c50": "cfd99bad-fb3f-43fe-be8a-cb745f2d4c78",
"6639eb1a-1335-44ec-ba8b-c3c52bff9e79": "ed3bc553-e873-472f-8dc1-7f2720ad457d",
"9ae36ef5-ca0e-4273-bb39-aedf289a119d": "6687017f-138b-4d75-91bd-c6465f1f5331",
"b862c3ee-55eb-486f-8125-a7a034d69340": "IBANK5-37207",
"f4b408ae-5418-4a8d-99d9-4a67cb34870b": "36dc55ac-359c-4312-9b1a-646ad5fd5aa9"
},
"createdById": "11a30c8b-73e2-4233-bbf5-7cc41556d3e0",
"modifiedById": "11a30c8b-73e2-4233-bbf5-7cc41556d3e0",
"createdDate": "2022-11-01T12:05:56.821Z",
"modifiedDate": "2022-11-02T14:16:55.246Z",
"state": "Ready",
"priority": "Medium",
"isDeleted": false,
"tagNames": [],
"iterations": []
}
]
I tried using
cat new2.xml | jq '.' | jq '.[] | select(."1be40893-5dad-4b37-b70d-b830c4bd273f" | index("0fda6bb8-4fc9-4463-9d26-af2d503cb19c")) | .[] .id'
but the search returns nothing


You could select on .attributes[] and display the id field only:
jq '.[] | select(.attributes[] == "0fda6bb8-4fc9-4463-9d26-af2d503cb19c").id'
Output:
"c3b1516d-5b2c-4838-b5eb-77d94d634832"
With the input given, you'd get the same result with the more specific:
jq '.[] | select(.attributes["1be40893-5dad-4b37-b70d-b830c4bd273f"] == "0fda6bb8-4fc9-4463-9d26-af2d503cb19c").id'
(because there's only one attribute Key with the Value "0fda6bb8-4fc9-4463-9d26-af2d503cb19c" in your example)

Related

Remove duplicates in JSON to CSV values using jq

Here I'm trying to convert json to csv. Also, I'm trying to ignore duplicate values of 'color' attribute in same command. I have tried with below jq cmd and getting bash: syntax error near unexpected token `(' error. Please help me to resolve this error.
jq -r '["color","category","type"], ([].colors | 'unique_by(.color)' | [.color, .category, .type]) | #csv' test.json > test.csv
My JSON file:
{
"colors": [
{
"color": "black",
"category": "hue",
"type": "primary",
"code": {
"rgba": [255,255,255,1],
"hex": "#000"
}
},
{
"color": "white",
"category": "value",
"code": {
"rgba": [0,0,0,1],
"hex": "#FFF"
}
},
{
"color": "red",
"category": "hue",
"type": "primary",
"code": {
"rgba": [255,0,0,1],
"hex": "#FF0"
}
},
{
"color": "black",
"category": "hue",
"type": "primary",
"code": {
"rgba": [0,0,255,1],
"hex": "#00F"
}
},
{
"color": "yellow",
"category": "hue",
"type": "primary",
"code": {
"rgba": [255,255,0,1],
"hex": "#FF0"
}
},
{
"color": "white",
"category": "hue",
"type": "secondary",
"code": {
"rgba": [0,255,0,1],
"hex": "#0F0"
}
}
]
}

Are you looking for this?
jq -r '.colors | unique_by(.color)[] | [.color, .category, .type] | #csv'
"black","hue","primary"
"red","hue","primary"
"white","value",
"yellow","hue","primary"
Demo
To add a default value (and make every line have the same amount of values), add // "<default_value>" when creating the final array. For instance, with "" as default, it'd be:
jq -r '.colors | unique_by(.color)[] | [.color//"", .category//"", .type//""] | #csv'
"black","hue","primary"
"red","hue","primary"
"white","value",""
"yellow","hue","primary"
Demo

jq and Bash: How to get value of key from value of object? (How to build/update a json?)

First of all, sorry for my English, I'm French.
I'm working on a script, which retrieves tags and links from M3U files to store them into variables.
M3U:
#EXTM3U
#EXTINF:-1 tvg-id="TFX.fr" tvg-name="TFX" tvg-country="FR;AD;BE;LU;MC;CH" tvg-language="French" tvg-logo="http://www.exemple.com/image.jpg" group-title="",TFX (720p)
https://tfx-hls-live-ssl.tf1.fr/tfx/1/hls/live_2328.m3u8
script:
#!/bin/bash
tags='#EXTINF:-1 tvg-id="TFX.fr" tvg-name="TFX" tvg-country="FR;AD;BE;LU;MC;CH" tvg-language="French" tvg-logo="http://www.exemple.com/image.jpg" group-title="Fiction",TFX (720p)'
get_chno="$(echo "$tags" | grep -o 'tvg-chno="[^"]*' | cut -d '"' -f2)"
get_id="$(echo "$tags" | grep -o 'tvg-id="[^"]*' | cut -d '"' -f2)"
get_logo="$(echo "$tags" | grep -o 'tvg-logo="[^"]*' | cut -d '"' -f2)"
get_grp_title="$(echo "$tags" | grep -o 'group-title="[^"]*' | cut -d '"' -f2)"
get_title="$(echo "$tags" | grep -o ',[^*]*' | cut -d ',' -f2)"
get_name="$(echo "$tags" | grep -o 'tvg-name="[^"]*' | cut -d '"' -f2)"
get_country="$(echo "$tags" | grep -o 'tvg-country="[^"]*' | cut -d '"' -f2)"
get_language="$(echo "$tags" | grep -o 'tvg-language="[^"]*' | cut -d '"' -f2)"
echo -e "chno:\n $get_chno"
echo -e "id:\n $get_id"
echo -e "logo:\n $get_logo"
echo -e "grp 1:\n $get_grp_title"
echo -e "title:\n $get_title"
echo -e "name:\n $get_name"
echo -e "country:\n $get_country"
echo -e "lang:\n $get_language"
I would like to store these variables in a json file.
This json will be used to rebuild another playlist.
#EXTM3U
#EXTINF:-1 tvg-id="TFX.fr" tvg-name="TFX" tvg-country="FR;AD;BE;LU;MC;CH" tvg-language="French" tvg-logo="http://www.exemple.com/image.jpg" group-title="",TFX (720p)
https://tfx-hls-live-ssl.tf1.fr/tfx/1/hls/live_2328.m3u8
#EXTINF:-1 tvg-id="TFX.fr" tvg-name="TFX" tvg-country="FR;AD;BE;LU;MC;CH" tvg-language="French" tvg-logo="http://127.0.0.1/img/image.jpg" group-title="",TFX (local)
http://127.0.0.1:1234/tfx/live.m3u8
The file which contains multiple arrays and multiple objects.
Like this :
{
"Channels": [
{
"name": "TFX",
"old_name": "NT1",
"logo": "http://www.exemple.com/image.jpg",
"category": "Fiction",
"urls": {
"Official": [
{
"server_name": "TF1",
"IP_address": "8.8.8.8",
"url": "tfx-hls-live-ssl.tf1.fr",
"port": "",
"https_port": "443",
"path": "tfx/1/hls/",
"file_name": "live_2328",
"extension": ".m3u8",
"full_url": "https://tfx-hls-live-ssl.tf1.fr/tfx/1/hls/live_2328.m3u8"
}
],
"Xtream_Servers": [
{
"server_name": "local",
"user_name": "rickey",
"stream_id": "11",
"category_name": "Fiction",
"category_id": "12"
}
]
},
"languages": [
{
"code": "fr",
"name": "Français"
}
],
"countries": [
{
"code": "fr",
"name": "France"
},
{
"code": "be",
"name": "Belgium"
}
],
"tvg": {
"id": "TFX.fr",
"name": "TFX",
"url": ""
}
},
{
"name": "France 2",
"old_name": "",
"logo": "http://www.exemple.com/image.jpg",
"category": "Général",
"urls": {
"Official": [
{
"server_name": "France TV",
"IP_address": "8.8.8.8",
"url": "france2.fr",
"port": "",
"https_port": "443",
"path": "live/",
"file_name": "Playlist",
"extension": ".m3u8",
"full_url": "https://france2.fr/live/Playlist.m3u8"
}
],
"Xtream_Servers": [
{
"server_name": "localhost",
"user_name": "rickey",
"stream_id": "2",
"category_name": "Général",
"category_id": "10"
}
]
},
"languages": [
{
"code": "fr",
"name": "Français"
}
],
"countries": [
{
"code": "fr",
"name": "France"
},
{
"code": "be",
"name": "Belgique"
}
],
"tvg": {
"id": "France2.fr",
"name": "France 2",
"url": ""
}
},
{
"name": "M6",
"old_name": "",
"logo": "http://www.exemple.com/image.jpg",
"category": "Général",
"urls": {
"Official": [
{
"server_name": "6Play",
"IP_address": "8.8.8.8",
"url": "6play.fr",
"port": "",
"https_port": "443",
"path": "live/",
"file_name": "Playlist",
"extension": ".m3u8",
"full_url": "https://6play.fr/M6/live/Playlist.m3u8"
}
],
"Xtream_Servers": [
{
"server_name": "localhost",
"user_name": "rickey",
"stream_id": "6",
"category_name": "Général",
"category_id": "10"
}
]
},
"languages": [
{
"code": "fr",
"name": "Français"
}
],
"countries": [
{
"code": "fr",
"name": "France"
},
{
"code": "be",
"name": "Belgique"
}
],
"tvg": {
"id": "France2.fr",
"name": "France 2",
"url": ""
}
}
],
"Third_Party": {
"Xtream_Servers": [
{
"server_name": "local",
"url": "192.168.1.100",
"port": "8080",
"https_port": "8082",
"server_protocol": "http",
"rtmp_port": "12345",
"Users_list": [
{
"username": "rickey",
"password": "azerty01",
"created_at": "",
"exp_date": "",
"is_trial": "0",
"last_check": "",
"max_connections": "3",
"allowed_output_formats": [
"m3u8",
"ts",
"rtmp"
]
}
]
},
{
"server_name": "localhost",
"url": "127.0.0.1",
"port": "8080",
"https_port": "8082",
"server_protocol": "http",
"rtmp_port": "12345",
"Users_list": [
{
"username": "rickey123",
"password": "azerty321",
"created_at": "",
"exp_date": "",
"is_trial": "0",
"last_check": "",
"max_connections": "3",
"allowed_output_formats": [
"m3u8",
"ts",
"rtmp"
]
},
{
"username": "guest",
"password": "guest01",
"created_at": "",
"exp_date": "",
"is_trial": "1",
"last_check": "",
"max_connections": "1",
"allowed_output_formats": [
"ts"
]
}
]
}
]
}
}
First question: Is it a crappy json?
To add or modify this file, the script must have the entry number (I think, if you have any other ideas, I'm interested...)
cat File.json | jq '.Channels | to_entries[]'
output:
{
"key": 0,
"value": {
"name": "TFX",
"old_name": "NT1",
2nd question:
How to get value key (0 is this case) with the value of "name", for store into variable after ? (to avoid duplicates)
key_="$(cat file.json | jq ????????? search="name": "$get_name" ???? .key)"
echo $key_
"0"
key_2="$(cat file.json | jq ????????? search="name": "$get_url" ???? .key)"
echo $key_2
"0"
if [[ $key_ == $key_2 ]]; then
Chan_Name="$(cat $1 | jq '.Channels[$key_].name)"
Echo $Chan_Name
"TFX"
jq '.[] ????? += {???? , ??? }' file.json | sponge file.json
fi
last question (most important):
How to find and modify these f*** objects, when the script does not know any values of the keys of the objects / arrays ?!
I've been looking for 2 days, my brain is liquid.
Thank you. :)
Edit 1 :
I've found a partial solution to replace value:
{
"name": "TFX",
"old_name": "NT1",
"logo": "http://www.exemple.com/image.jpg",
"category": "Fiction",
with:
cat file.json | jq -C '(.Channels[] | select(.name=="TFX").category="test")'
output:
{
"name": "TFX",
"old_name": "NT1",
"logo": "http://www.exemple.com/image.jpg",
"category": "test",
"urls": {
but "{"Channels": [" is missing. :/

jq -C '(.Channels[] | select(.name=="TFX").category="test")'
You were so close - just one misplaced parenthesis:
jq '(.Channels[] | select(.name=="TFX")) .category="test"'

what's the simplest way to calculate the sum of values at the end of this jq command?

I see that jq can calculate addition as simply as jq 'map(.duration) | add' but I've got a more complex command and I can't figure out how to perform this add at the end of it.
I'm starting with data like this:
{
"object": "list",
"data": [
{
"id": "in_1HW85aFGUwFHXzvl8wJbW7V7",
"object": "invoice",
"account_country": "US",
"customer_name": "clientOne",
"date": 1601244686,
"livemode": true,
"metadata": {},
"paid": true,
"status": "paid",
"total": 49500
},
{
"id": "in_1HJlIZFGUwFHXzvlWqhegRkf",
"object": "invoice",
"account_country": "US",
"customer_name": "clientTwo",
"date": 1598297143,
"livemode": true,
"metadata": {},
"paid": true,
"status": "paid",
"total": 51000
},
{
"id": "in_1HJkg5FGUwFHXzvlYp2uC63C",
"object": "invoice",
"account_country": "US",
"customer_name": "clientThree",
"date": 1598294757,
"livemode": true,
"metadata": {},
"paid": true,
"status": "paid",
"total": 57000
},
{
"id": "in_1H8B0pFGUwFHXzvlU6nrOm6I",
"object": "invoice",
"account_country": "US",
"customer_name": "clientThree",
"date": 1595536051,
"livemode": true,
"metadata": {},
"paid": true,
"status": "paid",
"total": 20000
}
],
"has_more": true,
"url": "/v1/invoices"
}
and my jq command looks like:
cat example-data.json |
jq -C '[.data[]
| {invoice_id: .id, client: .customer_name, date: .date | strftime("%Y-%m-%d"), amount: .total, status: .status}
| .amount = "$" + (.amount/100|tostring)]
| sort_by(.date)'
which nicely gives me output like:
[
{
"invoice_id": "in_1H8B0pFGUwFHXzvlU6nrOm6I",
"client": "clientThree",
"date": "2020-07-23",
"amount": "$200",
"status": "paid"
},
{
"invoice_id": "in_1HJlIZFGUwFHXzvlWqhegRkf",
"client": "clientTwo",
"date": "2020-08-24",
"amount": "$510",
"status": "paid"
},
{
"invoice_id": "in_1HJkg5FGUwFHXzvlYp2uC63C",
"client": "clientThree",
"date": "2020-08-24",
"amount": "$570",
"status": "paid"
},
{
"invoice_id": "in_1HW85aFGUwFHXzvl8wJbW7V7",
"client": "clientOne",
"date": "2020-09-27",
"amount": "$495",
"status": "paid"
}
]
and I want to add a sum/total at the end of that, something like Total: $1775, so that the entire output would look like this:
[
{
"invoice_id": "in_1H8B0pFGUwFHXzvlU6nrOm6I",
"client": "clientThree",
"date": "2020-07-23",
"amount": "$200",
"status": "paid"
},
{
"invoice_id": "in_1HJlIZFGUwFHXzvlWqhegRkf",
"client": "clientTwo",
"date": "2020-08-24",
"amount": "$510",
"status": "paid"
},
{
"invoice_id": "in_1HJkg5FGUwFHXzvlYp2uC63C",
"client": "clientThree",
"date": "2020-08-24",
"amount": "$570",
"status": "paid"
},
{
"invoice_id": "in_1HW85aFGUwFHXzvl8wJbW7V7",
"client": "clientOne",
"date": "2020-09-27",
"amount": "$495",
"status": "paid"
}
]
Total: $1775
Is there a neat/tidy way to enhance this jq command to achieve this?
Or even, since I'm invoking this in a shell script, a dirty/ugly way with bash?

If any of your output is going to be raw, you need to pass -r; it'll just be ignored for data items that aren't strings.
Anyhow -- if you write (expr1, expr2), then your input will be passed through both expressions. Thus:
jq -Cr '
([.data[]
| {invoice_id: .id,
client: .customer_name,
date: .date | strftime("%Y-%m-%d"),
amount: .total,
status: .status}
| .amount = "$" + (.amount/100|tostring)
] | sort_by(.date)),
"Total: $\([.data[] | .total] | add | . / 100)"
'

In case you decide after all to emit valid JSON, here is a modular answer to the question that makes it easy to formulate alternative approaches, and which postpones the conversion of .amount to dollars for efficiency:
def todollar:
"$" + tostring;
def json:
[.data[]
| {invoice_id: .id,
client: .customer_name,
date: .date | strftime("%Y-%m-%d"),
amount: (.total/100),
status: .status} ]
| sort_by(.date) ;
json
| map_values(.amount |= todollar),
"Total: " + (map(.amount) | add | todollar)
As noted elsewhere, you will probably want to use the -r command-line option.

unable to parse json into csv using jq

I have a JSON file that I want to convert into a CSV file using the jq in a shell script. I want to create a single row from this entire JSON file. I have to extract value from values. The row output should be something like
null,642,642,412,0,null,null
Here is my JSON file
{
"data": [
{
"name": "exits",
"period": "lifetime",
"values": [
{
"value": {}
}
],
"title": "Exits",
"description": "Number of times someone exited the carousel"
},
{
"name": "impressions",
"period": "lifetime",
"values": [
{
"value": 642
}
],
"title": "Impressions",
"description": "Total number of times the media object has been seen"
},
{
"name": "reach",
"period": "lifetime",
"values": [
{
"value": 412
}
],
"title": "Reach",
"description": "Total number of unique accounts that have seen the media object"
},
{
"name": "replies",
"period": "lifetime",
"values": [
{
"value": 0
}
],
"title": "Replies",
"description": "Total number of replies to the carousel"
},
{
"name": "taps_forward",
"period": "lifetime",
"values": [
{
"value": {}
}
],
"title": "Taps Forward",
"description": "Total number of taps to see this story's next photo or video"
},
{
"name": "taps_back",
"period": "lifetime",
"values": [
{
"value": {}
}
],
"title": "Taps Back",
"description": "Total number of taps to see this story's previous photo or video"
}
]
}
Hi tried using this jq command :
.data | map(.values[].value) | #csv
This is giving the following output:
jq: error (at :70): object ({}) is not valid in a csv row
exit status 5
So when I am getting this empty JSON object it is reflecting an error.
Please Help!!
The row output should be something like
null,642,642,412,0,null,null

Using length==0 here is dubious at best. To check for {} one could write:
jq '.data | map(.values[].value | if . == {} then "null" else . end) | #csv'
Similarly for [].

If you run the command without the #csv part you will see that the output is:
[
{},
642,
412,
0,
{},
{}
]
By replacing the empty objects with "null": (length == 0)
jq '.data | map(.values[].value) | map(if (type == "object" and length == 0 ) then "null" else . end) | #csv'
Output:
"\"null\",642,412,0,\"null\",\"null\""
Per suggestion from #aaron (see comment). The following can produce the requested output without extra post-processing. Disclaimer: this is not working with my jq 1.5, but working on jqplay with jq 1.6.
jq --raw-output '.data | map(.values[].value) | map(if (type == "object" and length == 0 ) then "null" else . end) | join(",")'
Output:
null,642,412,0,null,null

filter json via bash - case insensitive

I have json code and need to filter it by the value of the attribute DNSName. The filter must be case insensitive.
How can I do that? Is there a possibility to solve it with jq?
This is how I create the json code:
aws elbv2 describe-load-balancers --region=us-west-2 | jq
My unfiltered source json code looks like this:
{
"LoadBalancers": [
{
"IpAddressType": "ipv4",
"VpcId": "vpc-abcdabcd",
"LoadBalancerArn": "arn:aws:elasticloadbalancing:us-west-2:000000000000:loadbalancer/app/MY-LB1/a00000000000000a",
"State": {
"Code": "active"
},
"DNSName": "MY-LB1-123454321.us-west-2.elb.amazonaws.com",
"SecurityGroups": [
"sg-00100100",
"sg-01001000",
"sg-10010001"
],
"LoadBalancerName": "MY-LB1",
"CreatedTime": "2018-01-01T00:00:00.000Z",
"Scheme": "internet-facing",
"Type": "application",
"CanonicalHostedZoneId": "ZZZZZZZZZZZZZ",
"AvailabilityZones": [
{
"SubnetId": "subnet-17171717",
"ZoneName": "us-west-2a"
},
{
"SubnetId": "subnet-27272727",
"ZoneName": "us-west-2c"
},
{
"SubnetId": "subnet-37373737",
"ZoneName": "us-west-2b"
}
]
},
{
"IpAddressType": "ipv4",
"VpcId": "vpc-abcdabcd",
"LoadBalancerArn": "arn:aws:elasticloadbalancing:us-west-2:000000000000:loadbalancer/app/MY-LB2/b00000000000000b",
"State": {
"Code": "active"
},
"DNSName": "MY-LB2-9876556789.us-west-2.elb.amazonaws.com",
"SecurityGroups": [
"sg-88818881"
],
"LoadBalancerName": "MY-LB2",
"CreatedTime": "2018-01-01T00:00:00.000Z",
"Scheme": "internet-facing",
"Type": "application",
"CanonicalHostedZoneId": "ZZZZZZZZZZZZZ",
"AvailabilityZones": [
{
"SubnetId": "subnet-54545454",
"ZoneName": "us-west-2a"
},
{
"SubnetId": "subnet-64646464",
"ZoneName": "us-west-2c"
},
{
"SubnetId": "subnet-74747474",
"ZoneName": "us-west-2b"
}
]
}
]
}
I now want some bash code to filter this result for the record with the DNSName property value MY-LB2-9876556789.us-west-2.elb.amazonaws.com, and need the entire LoadBalancer object back as a result. This is how I wish my result to look like:
{
"IpAddressType": "ipv4",
"VpcId": "vpc-abcdabcd",
"LoadBalancerArn": "arn:aws:elasticloadbalancing:us-west-2:000000000000:loadbalancer/app/MY-LB2/b00000000000000b",
"State": {
"Code": "active"
},
"DNSName": "MY-LB2-9876556789.us-west-2.elb.amazonaws.com",
"SecurityGroups": [
"sg-88818881"
],
"LoadBalancerName": "MY-LB2",
"CreatedTime": "2018-01-01T00:00:00.000Z",
"Scheme": "internet-facing",
"Type": "application",
"CanonicalHostedZoneId": "ZZZZZZZZZZZZZ",
"AvailabilityZones": [
{
"SubnetId": "subnet-54545454",
"ZoneName": "us-west-2a"
},
{
"SubnetId": "subnet-64646464",
"ZoneName": "us-west-2c"
},
{
"SubnetId": "subnet-74747474",
"ZoneName": "us-west-2b"
}
]
}
Does anyone know how to do it?
Update:
This solution works, but is not case insensitive:
aws elbv2 describe-load-balancers --region=us-west-2 | jq -c '.LoadBalancers[] | select(.DNSName | contains("MY-LB2"))'
Update:
This solution seems to work even better:
aws elbv2 describe-load-balancers --region=us-west-2 | jq -c '.LoadBalancers[] | select(.DNSName | match("my-lb2";"i"))'
But I did not have the chance to test in detail yet.

You probably should be using test/2 rather than match/2, but in either case, since the problem description calls for
case-insensitive equality, you would use an anchored regex:
.LoadBalancers[]
| select(.DNSName | test("^my-lb2-9876556789.us-west-2.elb.amazonaws.com$";"i"))
With the caveat that ascii_upcase only translates ASCII characters, it might be more efficient to use it:
.LoadBalancers[]
| select(.DNSName | ascii_upcase == "MY-LB2-9876556789.US-WEST-2.ELB.AMAZONAWS.COM")

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