Extract ? number of JSON array objects into rows - postgresql

Question

So I am trying to pivot some large Json arrays into a row by row format (postgres db). So imagine
{“searchResults”:[{“id”:“89705”,“score”:42,“title”:“Foo.”,“properties”:{…
Currently the most results we have in an array is about 300~ id's and explicitly saying;
Data::Json->'searchResults'->0->'tags'->0->>'label' as "Tag - Result 1",
...
Data::Json->'searchResults'->300->'tags'->0->>'label' as "Tag - Result
1",
Ideal Output
Array, ID , Score, Title
----
1 89705, 42, foo
1 89706, 34, bar
2 90003, 54, thing
2 98594, 53, that
(so 1,2 represent different rows in the initial table that both contain ??? amounts of objects the JSON data array)
Expanded JSON
{
"searchResults": [
{
"id": "897096",
"score": 42,
"title": "foo.",
"properties": {
"#type": "blah",
},
"publishedDate": "2018-06-30T10:20:20.555040Z",
"comments": [
{
"content": "",
"owner": {
"firstName": "",
"id": 0,
"lastName": ""
},
"id": 0,
"contentType": "",
"documentPk": 0,
"workflowStep": 0,
"order": 0
}
],
"tags": [
{
"tag": 783,
"label": "NO",
"iconClass": "",
"subGroup": "",
"exclude": false
},
{
"tag": 786,
"label": "Different name",
"iconClass": "",
"subGroup": "",
"exclude": false
}
],
"reviewTags": [
{
"tag": 2,
"label": "Accept",
"iconClass": "",
"subGroup": "",
"exclude": false
}
],
"original": {
..."names": [
{
"full_name": "This name"
}
],
"Entry Type": "Organization",
"Last Updated": "2018/05/03",
"Hit Category": "N/A",
"Aliases": [
"Olaj",
"hbhbhb"
]
},
"snippet": "",
"url": "",
"source": "_"
},
{
"id": "879057",
"score": 36,
"title": "name of company",
"properties": {
"#type": "",
"category": "SOE",
"type": "Organization",
"country": "Korea, Republic Of",
"subcategory": ""
},
"publishedDate": "2018-05-31T10:20:20.559714Z",
"comments": [
{
"content": "",
"owner": {
"firstName": "",
"id": 0,
"lastName": ""
},
"id": 0,
"contentType": "",
"documentPk": 0,
"workflowStep": 0,
"order": 0
}
],
"tags": [
{
"tag": 783,
"label": "NO",
"iconClass": "",
"subGroup": "",
"exclude": false
},
{
"tag": 786,
"label": "Different name",
"iconClass": "",
"subGroup": "",
"exclude": false
}
Any advise on what my options are here ?
Thanks #a_horse_with_no_name this worked perfectly.

Answer 1

it's unclear to me how the JSON continues in the array, but it seems you are looking for something like this:
with testdata(props) as (
values (
'{"searchResults":
[
{"id":"89705","score":42,"title":"Foo"},
{"id":"89706","score":34, "title":"bar"}
]}'::jsonb
)
)
select x.idx,
x.val ->> 'id' as id,
x.val ->> 'score' as score,
x.val ->> 'title' as title
from testdata, jsonb_array_elements(props -> 'searchResults') with ordinality as x (val, idx);
returns
idx | id | score | title
----+-------+-------+------
1 | 89705 | 42 | Foo
2 | 89706 | 34 | bar