Query complex JSON in Postgres - postgresql

Question

I have a json column named "Payload" with a complex json structure as below-
{
"Number": "",
"Status": "",
"Parties": [
{
"BeCode": "SHANGMAG",
"PartyCode": "CNSHANGMAGVDR",
},
{
"BeCode": "FREEMAN",
"PartyCode": "CNFREEMANVDR",
}
],
"ContactName": "test",
"Type": "",
"Legs": [
{
"Name": "",
"ELocation": {
"City": "Enns",
"State": null,
"Country": "Austria",
},
"Socation": {
"City": "Buenos Aires",
"State": null,
"Country": "Argentina",
},
"Transport": 1
},
{
"Name": "84nbt",
"ELocation": {
"City": "Linz",
"State": null,
"Country": "Austria",
},
"SLocation": {
"City": "Enns",
"State": null,
"Country": "Austria",
},
"Transport": 2
}
]
"Bookings": [
{
"BookingNo": "",
"Status": "",
"Id": ""
}
]
}
Now I need to query all the rows where SLocation is equal to ELocation.
I was able to get the "Legs" part row vise using following query -
select payload->'Legs'
from public.shipping_instruction
However, If I dig deep into the json to get the SLocation and ELocation, the query doesnt exceute.
I am looking for something like the one below-
select payload->'Legs'
from public.shipping_instruction where
payload->'Legs'->'ELocation'->'City' =
payload->'Legs'->'SLocation'->'City'
But then here the Legs have multiple SLocation and ELocation how do I handle it?

Answer 1

select "Number",
x."Status" as Status,
"BeCode",
"PartyCode",
"ContactName",
"Type",
"Name",
"Transport",
e_city,
e_state,
e_country,
s_city,
s_state,
s_country,
"BookingNo",
b."Status" as BookingStatus,
"Id"
from jsonb_to_record('{
"Number": "",
"Status": "",
"Parties": [
{
"BeCode": "SHANGMAG",
"PartyCode": "CNSHANGMAGVDR"
},
{
"BeCode": "FREEMAN",
"PartyCode": "CNFREEMANVDR"
}
],
"ContactName": "test",
"Type": "",
"Legs": [
{
"Name": "",
"ELocation": {
"City": "Enns",
"State": null,
"Country": "Austria"
},
"SLocation": {
"City": "Buenos Aires",
"State": null,
"Country": "Argentina"
},
"Transport": 1
},
{
"Name": "84nbtMatch",
"ELocation": {
"City": "Linz",
"State": null,
"Country": "Austria"
},
"SLocation": {
"City": "Linz",
"State": null,
"Country": "Austria"
},
"Transport": 2
},
{
"Name": "84nbt",
"ELocation": {
"City": "Linz",
"State": null,
"Country": "Austria"
},
"SLocation": {
"City": "Enns",
"State": null,
"Country": "Austria"
},
"Transport": 3
}
],
"Bookings": [
{
"BookingNo": "bn",
"Status": "bs",
"Id": "bid"
}
]
}'::jsonb) as x("Number" text,
"Status" text,
"Parties" jsonb,
"ContactName" text,
"Type" text,
"Legs" jsonb,
"Bookings" jsonb),
lateral jsonb_to_recordset(x."Parties") as p("BeCode" text, "PartyCode" text),
lateral jsonb_to_recordset(x."Legs") as l("Name" text, "Transport" int, "ELocation" jsonb, "SLocation" jsonb),
lateral (select l."ELocation" ->> 'City' as e_city,
l."ELocation" ->> 'State' as e_state,
l."ELocation" ->> 'Country' as e_country,
l."SLocation" ->> 'City' as s_city,
l."SLocation" ->> 'State' as s_state,
l."SLocation" ->> 'Country' as s_country
) loc,
lateral jsonb_to_recordset(x."Bookings") as b("BookingNo" text, "Status" text, "Id" text)
where coalesce(e_city, '') = coalesce(s_city, '')
and coalesce(e_state, '') = coalesce(s_state, '')
and coalesce(e_country, '') = coalesce(s_country, '');