I want to retrieve data by specific field operation it store array of object. i want to add new object in it.
CREATE TABLE justjson ( id INTEGER, doc JSONB);
INSERT INTO justjson VALUES ( 1, '[
{
"name": "abc",
"age": "22"
},
{
"name": "def",
"age": "23"
}
]');
retrieve data where age is greater then and equal to 23 how is possible
eg using jsonb_array_elements:
t=# with a as (select *,jsonb_array_elements(doc) k from justjson)
select k from a where (k->>'age')::int >= 23;
k
------------------------------
{"age": "23", "name": "def"}
(1 row)
Related
I have two following tables:
CREATE TABLE elements(
id INT PRIMARY KEY,
element_type INT,
api_name VARCHAR(100) UNIQUE
);
CREATE TABLE entries(
id INT PRIMARY KEY,
elements JSONB
)
entries.elements field stored a jsonb-array of elements in following format:
[
{
"id": elements.id
"type": elements.element_type
"value": <some_value>
},
{
"id": elements.id
"type": elements.element_type
"value": <some_value>
}
...
]
The value field can be one of 3 types:
Literal (i.e. "abc", 12, true)
Array of literals (i.e. ["abc", "cbd"], [12, 21])
Array of objects (i.e. [{"node_id": <uuid>, "value": "abc"}, {"node_id": <uuid>, "value": "cba"}])
And I have index (maybe incorrect)
CREATE INDEX some_idx_name
ON entries
USING GIN (elements jsonb_ops)
For example suppose that I have data in these tables:
INSERT INTO elements(id, element_type, api_name) VALUES
(1, 1, 'el_number_1'),
(2, 2, 'el_datetime'),
(3, 3, 'el_files'),
(4, 1, 'el_number_2');
INSERT INTO entries(id, elements) VALUES
(1, '[{"id": 1, "type": 1, "value": 12}, {"id": 3, "type": 3, "value": [1, 2]}]'::JSONB),
(2, '[{"id": 4, "type": 1, "value": 12}, {"id": 2, "type": 2, "value": [{"date": "20.12.2022", "time": "16:18"}]}]'::JSONB);
So if I want to find entry by elements I need to do something like this:
SELECT id
FROM entries
WHERE elements #? '$[*] ? (#.id == 4 && #.value = 12)'
But how can I find entry by value of elements which was found by api_name?
-- DOES NOT WORK (only for example what I need)
SELECT id
FROM entries
WHERE elements #? '$[*] ? (#.id == (SELECT id FROM elements WHERE api_name = 'el_number_2') && #.value = 12)'
Fiddle link
So I have Postgres DB table 'purchases' with columns 'id' and 'receipt'. 'id' is primary int column, the value in column 'receipt' is jsonb and can look like this:
{
"shop_name":"some_shop_name",
"items": [
{
"name": "foo",
"spent": 49,
"quantity": 1
},
{
"name": "bar",
"price": 99,
"quantity": 2
},
{
"name": "abc",
"price": 999,
"quantity": 1
},
...
]
}
There can be varied amount of items in receipt.
In the end I need to write a query so the resulting table contains purchase id and amount spent on all bar for every purchase in table as such:
id
spent
1
198
..
...
My issue:
I can't figure out how to work with jsonb inside select query along regular columns in the resulting table, I guess query should be structured as this:
SELECT p.id, %jsonb_parsing_result_here% AS spent
FROM purchases p
It's blocking me from moving further with iterating through items in FOR cycle (or maybe using another way).
You can unnest the items from the receipt column with a lateral join and the jsonb_array_elements function like:
SELECT p.id, SUM((item->>'price')::NUMERIC)
FROM purchases p,
LATERAL jsonb_array_elements(p.receipt->'items') r (item)
GROUP BY p.id
It's also possible to add a where condition, for example:
WHERE item->>'name' = 'bar
I have some nested JSONB object/arrays that I want to update/insert into array completely when a given set of values match.
I've tried this command UPDATE asset SET detail = jsonb_set(detail, '{"date": "01/01/2019"}', '{"name": "ABC", "date": "01/01/2019"}');, but doesn't work since the command is looking for an index and using || simply appends the new object into the array instead of replacing it.
Schemas
Table
CREATE TABLE asset (
id uuid NOT NULL DEFAULT uuid_generate_v1(),
detail jsonb NULL,
events_connected jsonb NULL
);
JSONB Schemas
[{
"name": "Stackoverflow",
"date": "01/01/2019"
}]
A little more in depth
[{
"id": "12345",
"events": [{"type": 0, "date": "01/01/01", "ratio": 1.0}]
}]
EDIT:
I've played around with this code which almost works, but it updates all rows with the new object instead of simply inserting/updating the event id and keys that matches. The sub query that finds the matching params seem to work.
update
asset
set
events_connected =
jsonb_set(
events_connected,
array[elem_index::text, 'events', nested_elem_index::text],
'{"type": 2, "ratio": 5.0, "tax": 1, "date": "01/02/2019"}'::jsonb,
true)
from (
select
(pos - 1) as "elem_index",
(pos2 - 1) as "nested_elem_index",
elem->>'id' as "id"
from
asset,
jsonb_array_elements(events_connected) with ordinality arr(elem, pos),
jsonb_array_elements(elem->'events') with ordinality arr2(elem2, pos2)
WHERE
elem->>'id' = '12345' AND
elem2->>'type' = '1' AND
elem2->>'date' = '01/02/2019'
) sub
WHERE
sub."elem_index" IS NOT NULL AND sub."nested_elem_index" IS NOT NULL;
Fiddle: https://dbfiddle.uk/?rdbms=postgres_11&fiddle=1b3f3b0c7a9f0adda50c54011880b61d
I have jsonb data as :
id | data
1 | {"last": "smith", "first": "john", "title": "mr"}
2 | {"last": "smith jr", "first": "john", "title": "mr"}
3 | {"last": "roberts", "first": "Julia", "title": "miss"}
4 | {"last": "2nd", "first": "john smith", "title": "miss"}
I need to search for records which match with "John smith"; So, in this case IDs - 1,2,4
I cannot separate the search for each key => value pair; I need to get concatenated entry for records to check against incoming request.
I have tried
select * from contacts where jsonb_concat(data->>'title'::TEXT || data->>'first'::TEXT || data->>'last'::TEXT) ilike "John smith";
This doesn't work because I am trying to concat values and not jsonb object. Is there any way to concat jsonb values specified by keys?
I solved it myself with some research..
my query is like -
select * from contacts where trim(regexp_replace(CONCAT(data->>'title'::TEXT,' ',data->>'first'::TEXT,' ',data->>'last'::TEXT), '\s+', ' ', 'g')) ilike '%john%';
For PostgreSQL versions > 9.1 .. you can use '\s+' instead of '\s+'.
hope this helps someone.
I have the following:
SELECT *
FROM (
SELECT '{"people": [{"name": "Bob", "occupation": "janitor"}, {"name": "Susan", "occupation": "CEO"}]}'::jsonb as data
) as b
WHERE data->'people' #> '[{"name":"Bob"}]'::jsonb;
I am filtering for the object '{"name": "Bob", "occupation": "janitor"}'
How do I return Bob's occupation ("janitor")?
SELECT data->'people'->>'occupation'
FROM (
SELECT '{"people": [{"name": "Bob", "occupation": "janitor"}, {"name": "Susan", "occupation": "CEO"}]}'::jsonb as data
) as b
WHERE data->'people' #> '[{"name":"Bob"}]'::jsonb;
returns
?column?
--------
NULL
Looking for:
occupation
----------
janitor
If you don't care about anything else on the row where the jsonb is, you can take all elements out of the jsonb and then use them as separate elements to select from
SELECT data->>'occupation' as occupation
FROM (
SELECT jsonb_array_elements(
'{"people":
[
{"name": "Bob", "occupation": "janitor"},
{"name": "Susan", "occupation": "CEO"}
]
}'::jsonb->'people') as data) as b
WHERE data #> '{"name":"Bob"}';
Results
occupation
-----------
janitor
(1 row)
Your "people" element is an array. You can get at the elements of an array with the jsonb_array_elements function. After that, you can just filter on person->>'name':
SELECT person->>'occupation' as occupation
FROM (
SELECT person.value as person
FROM (
SELECT
'{"people":
[
{"name": "Bob", "occupation": "janitor"},
{"name": "Susan", "occupation": "CEO"}
]
}'::jsonb as data
) a
CROSS JOIN
jsonb_array_elements(data->'people') as person
) b
WHERE person->>'name' = 'Bob';
Note that ->> returns text, while -> returns jsonb.