Postgres JSON array - how to do select fields - json

Question

I have table in Postgres with JSONB filed.
JSONB contains jsons as:
{
"id": "adf59079-4921-4abc-a262-1dc8c2b1ccc7",
"lastname": "LOBATOS",
"firstname": "Leslie",
"birth_date": "1988-01-26",
"gender": 3,
"contacts": {
"phoneList": [
{
"fullNumber": "0671234567",
"verifyStateId": 1
},
{
"fullNumber": "0671234588",
"verifyStateId": 0
}
]
}
}
I need select following data-set (in SQL notation)
SELECT id, lastname, fullNumber FROM <JSONB-field>
WHERE fullNumber LIKE '067%' and verifyStateId = 1
Plz help write query

Answer 1

You can use a JSON path expression to filter out the needed rows:
where the_column #? '$.contacts.phoneList[*] ? (#.fullNumber like_regex "^067" && #.verifyStateId == 1)'
To actually get the fullNumber you need to repeat the JSON path in order to extract the array element in question:
select id,
the_column ->> 'lastname',
jsonb_path_query_first(the_column,
'$.contacts.phoneList[*] ? (#.fullNumber like_regex "^067" && #.verifyStateId == 1)'
) ->> 'fullNumber' as fullnumber
from the_table
where the_column #? '$.contacts.phoneList[*] ? (#.fullNumber like_regex "^067" && #.verifyStateId == 1)'
The WHERE condition can potentially make use of a GIN index on the_column to improve performance.
If there is no such index or performance isn't that important, you can avoid repeating the JSON path by using a derived table:
select *
from (
select id,
the_column ->> 'lastname',
jsonb_path_query_first(the_column, '$.contacts.phoneList[*] ? (#.fullNumber like_regex "^067" && #.verifyStateId == 1)') ->> 'fullNumber' as fullnumber
from the_table
) t
where fullnumber is not null

Answer 2

You can use next query:
with unnested as (
select
fld->>'id' id, fld->>'lastname' lastname,
jsonb_array_elements(((fld->>'contacts')::jsonb->>'phoneList')::jsonb)
from tbl
) select id, lastname, jsonb_array_elements->>'fullNumber' from unnested;
PostgreSQL fiddle
+======================================+==========+============+
| id | lastname | ?column? |
+======================================+==========+============+
| adf59079-4921-4abc-a262-1dc8c2b1ccc7 | LOBATOS | 0671234567 |
+--------------------------------------+----------+------------+
| adf59079-4921-4abc-a262-1dc8c2b1ccc7 | LOBATOS | 0671234588 |
+--------------------------------------+----------+------------+

Answer 3

demo
WITH cte AS (
SELECT
jsonb_path_query(data, '$.contacts.phoneList[*].verifyStateId')::text AS verifyStateId,
jsonb_path_query(data, '$.id')::text AS id,
jsonb_path_query(data, '$.lastname')::text AS lastname,
jsonb_path_query(data, '$.contacts.phoneList[*].fullNumber')::text AS fullnumber
FROM
extract_jsonb
)
SELECT
*
FROM
cte
WHERE
verifyStateId = '1'::text
AND fullnumber ILIKE '"067%'::text;
since cast to text, somehow the first character of fullnumber is "