Postgres: Multiple conditions on jsonb object

Question

This is the dataset with around 200,000 rows

"test"  "test"  "[{""field"": ""devops"", ""years"": 8}, {""field"": ""backend dev"", ""years"": 3}]"
"test"  "test"  "[{""field"": ""devops"", ""years"": 9}, {""field"": ""backend dev"", ""years"": 4}]"
"test"  "test"  "[{""field"": ""devops"", ""years"": 9}, {""field"": ""backend dev"", ""years"": 9}]"

I want to find all the users who's experience is :

• devops = +5years
• backend dev = +5 years

One condition is working in my query:

with parsed_exp as ( 
 select 
 "firstName", 
 "lastName", 
 experience, 
 jsonb_array_elements(experience) as e from users )
select * from parsed_exp 
where (e->>'field') = 'backend dev' and (e->>'years')::integer > 5 

But two conditions together are not working:

with parsed_exp as ( 
 select 
 "firstName", 
 "lastName", 
 experience, 
 jsonb_array_elements(experience) as e from users )
select * from parsed_exp 
where 
(e->>'field') = 'backend dev' and (e->>'years')::integer > 5 and 
(e->>'field') = 'devops' and (e->>'years')::integer > 5

^^ It's returning 0 rows

Answer 1

If you are on Postgres 12 or later, you can use a JSON path expression:

select *
from users 
where jsonb_path_exists(experience, '$[*] ? (@.field == "devops" && @.years > 5)')
  and jsonb_path_exists(experience, '$[*] ? (@.field == "backend dev" && @.years > 5)')