MyTable
id | data
___________
1 |[{"Session1": "", "DeviceId1": ""}, {"Session2": "", "DeviceId2": ""}]
I want update data and set Session1 equal to xxx and DevicceId1 eaqual to yyy
I write this query but this not worked
update MyTable data=jsonb_set(data, '{Session1}', 'xxx',true)
How can update value of array of json in PostgreSQL?
data is a json array, so the path to Session1 needs to be {0,Session1}, similarly {0,DeviceId1} for DeviceId1
Which would make the update statement:
UPDATE "MyTable"
SET "data" = jsonb_set(jsonb_set(data, '{0,Session1}', '"xxx"', true), '{0,DeviceId1}', '"yyy"', true)
WHERE id = 1
You can use a json array index (starting from 0) as a path:
update my_table
set data = jsonb_set(data, '{0}', '{"Session1": "xxx", "DeviceId1": "yyy"}')
where id = 1
returning *;
id | data
----+------------------------------------------------------------------------------
1 | [{"Session1": "xxx", "DeviceId1": "yyy"}, {"Session2": "", "DeviceId2": ""}]
(1 row)
Related
I want to remove an object from a json column in Sqlite and I can't make it work. The json column contains a nested object, has the following type:
{
a: number;
pair: {
field1: string;
field2: string;
}[]
}
I want to update the column "ArrayColumn" with the same values but remove the object that has field1 equal to "0" and field2 equal to "1" . Every row contains the "pair" array, but not all the "pair" arrays in ArrayColumn contain this value ({"field1":"0", "field2":"1"})
I have the following structure:
Id| ArrayColumn
--------------------------------------------------------------------------------------------
1 | { "a":1, "pair":[{"field1":"0", "field2":"1"},{"field1":"C", "field2":"D"},{"field1":"E", "field2":"F"}] }
2 | { "a":5, "pair":[{"field1":"C", "field2":"D"},{"field1":"E", "field2":"F"}] }
3 | { "a":8, "pair":[{"field1":"G", "field2":"G"},{"field1":"0", "field2":"1"},{"field1":"A", "field2":"A"}] }
4 | { "a":1, "pair":[{"field1":"F", "field2":"T"},{"field1":"C", "field2":"D"},{"field1":"0", "field2":"1"}] }
5 | { "a":1, "pair":[{"field1":"A", "field2":"B"}] }
After updating the rows, the values would be:
Id| ArrayColumn
--------------------------------------------------------------------------------------------
1 | { "a":1, "pair":[{"field1":"C", "field2":"D"},{"field1":"E", "field2":"F"}] }
2 | { "a":5, "pair":[{"field1":"C", "field2":"D"},{"field1":"E", "field2":"F"}] }
3 | { "a":8, "pair":[{"field1":"G", "field2":"G"},{"field1":"A", "field2":"A"}] }
4 | { "a":1, "pair":[{"field1":"F", "field2":"T"},{"field1":"C", "field2":"D"}] }
5 | { "a":1, "pair":[{"field1":"A", "field2":"B"}] }
I tried with JSON_TREE but can't make it work.
I was thinking that the first step would be to select all the rows that contain that value, I retreived them using these 2 ways:
With LIKE operator searching for the stringified form:
select Id, json_extract(json(par), '$.pair') as pair from Table pair like '%{"field1":"0","field2":"1"}%'
Using json_tree
select Id, value from Table, json_tree(Table.ArrayColumn, '$.pair' ) where json_extract(value, '$.field1' ) = '0' AND json_extract(value, '$.field2' ) = '1'
I tried using json_remove with this small example but no luck:
SELECT json_remove('[{"field1":"1","field2":"0"},{"field1":"A","field2":"B"}]', '${"field1":"1","field2":"0"}' )
I tried using json_remove but had no luck.
Thank you
For this sample data the simplest way to do this is to treat the json column as a string and use string functions to remove the value that you want:
UPDATE tablename
SET ArrayColumn = REPLACE(REPLACE(REPLACE(ArrayColumn, ']', ',]'), '{"field1":"0", "field2":"1"},', ''), ',]', ']')
WHERE ArrayColumn LIKE '%{"field1":"0", "field2":"1"}%';
See the demo.
I have jsonb field(data) in Postgresql with a structure like:
{ "id" => { "some_key" => [1, 2, 3] } }
I need to migrate the value to a different field.
t.jsonb "data"
t.integer "portals", default: [], array: true
When I'm trying to do like this:
UPDATE table_name
SET portals = ARRAY[data -> '1' ->> 'portals']
WHERE id = 287766
It raises an error:
Caused by PG::DatatypeMismatch: ERROR: column "portals" is of type integer[] but expression is of type text[]
Here is one way to do it. But if you search the site, as you should had to do, you get more.
Schema
create table t (
data jsonb
);
insert into t values ('{"1" : { "k1" : [1,2,3,5]} }');
insert into t values ('{"2" : { "k2" : [4,5,6,7]} }');
create table i (
id int,
v int[]
)
Some tests
select data -> '1' -> 'k1'
from t
where data ? '1'
;
insert into i values(1,ARRAY[1,2,3]);
update i
set v = (select replace(replace(data -> '1' ->> 'k1', '[', '{'), ']', '}')::int[] from t where data ? '1')
where id = 1;
select * from i;
The above gets array as a text, as you did. After that, just some text replacements to cast the text to an integer array literal.
DB Fiddle
From this:
"data": {
"media_object_uuid": ["5171167e-c109-4926-9606-5212ee250e2f"]
}
to this:
"data": {
"media_object":[{"media_object_uuid": "5171167e-c109-4926-9606-5212ee250e2f"]
}
In words, I want to extract the first value of this array and set it on the new field media_object_uuid inside media_object. My approach to resolve this was:
update demo_test set data = jsonb_set(data,'{media_object_uuid}',('{"media_object": { "media_object_uuid":' || (data->"media_object_uuid"[0])::text || '}}'));
But I have in return media_object_uuid column doesn't exist
I think you need to call data->"media_object_uuid" as data->'media_oject_uuid', since in Postgres, double-quotes are used to refer to column/entity names (unless they are first encapsulated in single-quotes):
edb=# create table abc (data jsonb);
CREATE TABLE
edb=# insert into abc values ('{
edb'# "media_object_uuid": ["5171167e-c109-4926-9606-5212ee250e2f"]
edb'# }');
INSERT 0 1
edb=# select ('{"media_object": [{ "media_object_uuid":' || (data->'media_object_uuid')::text || '}]}') from abc;
?column?
-------------------------------------------------------------------------------------
{"media_object": [{ "media_object_uuid":["5171167e-c109-4926-9606-5212ee250e2f"]}]}
(1 row)
edb=# update abc set data = jsonb_set(data,'{media_object_uuid}', ('{"media_object": [{ "media_object_uuid":' || (data->'media_object_uuid')::text || '}]}')::jsonb);
UPDATE 1
edb=# select * from abc;
data
------------------------------------------------------------------------------------------------------------
{"media_object_uuid": {"media_object": [{"media_object_uuid": ["5171167e-c109-4926-9606-5212ee250e2f"]}]}}
(1 row)
I have one column table in my snowflake database that contain a JSON mapping structure as following
ColumnMappings : {"Field Mapping": "blank=Blank,E=East,N=North,"}
How to write a query that if I feed the Field Mapping a value of E I will get East or if the value if N I will get North so on and so forth without hard coding the value in the query like what CASE statement provides.
You really want your mapping in this JSON form:
{
"blank" : "Blank",
"E" : "East",
"N" : "North"
}
You can achieve that in Snowflake e.g. with a simple JS UDF:
create or replace table x(cm variant) as
select parse_json(*) from values('{"fm": "blank=Blank,E=East,N=North,"}');
create or replace function mysplit(s string)
returns variant
language javascript
as $$
res = S
.split(",")
.reduce(
(acc,val) => {
var vals = val.split("=");
acc[vals[0]] = vals[1];
return acc;
},
{});
return res;
$$;
select cm:fm, mysplit(cm:fm) from x;
-------------------------------+--------------------+
CM:FM | MYSPLIT(CM:FM) |
-------------------------------+--------------------+
"blank=Blank,E=East,N=North," | { |
| "E": "East", |
| "N": "North", |
| "blank": "Blank" |
| } |
-------------------------------+--------------------+
And then you can simply extract values by key with GET, e.g.
select cm:fm, get(mysplit(cm:fm), 'E') from x;
-------------------------------+--------------------------+
CM:FM | GET(MYSPLIT(CM:FM), 'E') |
-------------------------------+--------------------------+
"blank=Blank,E=East,N=North," | "East" |
-------------------------------+--------------------------+
For performance, you might want to make sure you call mysplit only once per value in your mapping table, or even pre-materialize it.
I have a problem greatest!! I guess that really want Array, look my console when I checked just one:
{"value_solve"=>["", "", "333", ""], "contract_number"=>["33"]}
-----
SQL (317.5ms) UPDATE "authorizations" SET "value_solve" = '', "situation" = 2 WHERE "authorizations"."contract_number" = ? [["contract_number", "33"]]
After, when I checked just one, the first:
{"value_solve"=>["111", "", "", ""], "contract_number"=>["11"]}
-----
SQL (317.5ms) UPDATE "authorizations" SET "value_solve" = '111 ', "situation" = 2 WHERE "authorizations"."contract_number" = ? [["contract_number", "11"]]
And, for last, when I just more then one:
{"contract_number"=>["11", "44"], "value_solve"=>["111", "", "", "444"]}
-----
SQL (297.7ms) UPDATE "authorizations" SET "value_solve" = '111', "situation" = 2 WHERE "authorizations"."contract_number" = ? [["contract_number", "11"]]
SQL (121.9ms) UPDATE "authorizations" SET "value_solve" = '', "situation" = 2 WHERE "authorizations"."contract_number" = ? [["contract_number", "44"]]
And this is my controller:
#selected_ids = params[:authorization][:contract_number]
#authorizations = Authorization.where("contract_number in (?)", #selected_ids)
auth_params = params[:authorization]
auth_params[:contract_number].zip(auth_params[:value_solve]).each do |contract_number, value_solve|
Authorization.where(contract_number: contract_number).update_all(value_solve: value_solve, situation: 2)
end
Just save the first value on DB, how I can save more then one value? Thanks!
As I understood, you want the contract_number with id 44 to be “associated” with value_solve == "444". If this is correct, you should remove blanks from your value_solve array:
auth_params[:contract_number].zip(auth_params[:value_solve].reject(&:blank?))...
Now 44 is being updated with the second element of value_solve, which is apparently an empty string.
See Array#zip for more details.