I am using POSTGRES SQL JSON.
In json column the value is stored as array which I want to update using SQL query
{"roles": ["Admin"]}
The output in table column should be
{"roles": ["SYSTEM_ADMINISTRATOR"]}
I tried different queries but it is not working.
UPDATE public.bo_user
SET json = jsonb_set(json, '{roles}', to_jsonb('SYSTEM_ADMINISTRATOR')::jsonb, true);
UPDATE public.bo_user
SET json = jsonb_set(json, '{roles}', to_jsonb('["SYSTEM_ADMINISTRATOR"]')::jsonb, true);
ERROR: could not determine polymorphic type because input has type unknown
SQL state: 42804
Kindly help me with the query
but at the moment it is to update the value at 0 index
That can be done using an index based "path" for jsonb_set()
update bo_user
set "json" = jsonb_set("json", '{roles,0}'::text[], '"SYSTEM_ADMINISTRATOR"')
where "json" #>> '{roles,0}' = 'Admin'
The "path" '{roles,0}' references the first element in the array and that is replaced with the constant "SYSTEM_ADMINISTRATOR"' Note the double quotes inside the SQL string literal which are required for a valid JSON string
The WHERE clause ensures that you don't accidentally change the wrong value.
So this worked.
UPDATE public.bo_user
SET json = jsonb_set(json, '{roles}', ('["SYSTEM_ADMINISTRATOR"]')::jsonb, true)
where id = '??';
Related
I am trying to update the value of a JSONB column from a JSON string like :
{"fruit":"apple", "color":"blue"}
to an array of JSON objects like :
[{"fruit":"apple"}, {"color":"blue"}]
I tried the following command :
UPDATE table_name SET data = json_build_array(data::JSONB);
It however gave me the following :
[{"fruit":"apple","color":"blue"}]
What can I use to get separate JSON objects in the array?
You can access each key-value pair in the JSON object using json_each, and then aggregate the results into an array:
update table_name set data = (select json_agg(json_build_object(v.key, v.value))
from json_each(data) v)
See fiddle.
I intend to use func function to update a specific JSON field in Sqlalchemy, but I get some problem, here is my code to update field:
self.db.query(TestModel).filter(TestModel.test_id == self._test_id).update(
{field_name: func.json_set(
field_name,
"$." + key,
formatted_val)}
, synchronize_session='fetch'
)
self.db.commit()
I ran the code above and got the error:
sqlalchemy.exc.OperationalError: (sqlite3.OperationalError) malformed JSON
So, I go to check the log, found Sqlalchemy form an SQL clause like that:
UPDATE test_model SET field_name=json_set('field_name', '$.keyname', 'value') WHERE test_model.test_id = 1;
the problem is Sqlalchemy should not use 'field_name' to specific the field it should use field_name to specific the field, and I try to run corrected sql clause below in sql client:
UPDATE test_model SET field_name=json_set(field_name, '$.keyname', 'value') WHERE test_model.test_id = 1;
and it work find
I just want to know how to make the Sqlalchemy form the correct field from 'field_name' to field_name?
You should pass first parameter with a name of model to function func.json_set:
self.db.query(TestModel).filter(TestModel.test_id == self._test_id).update(
{field_name: func.json_set(
TestModel.field_name,
"$." + key,
formatted_val)},
synchronize_session='fetch'
)
self.db.commit()
I'm converting this progress statement into SQL.
for each usr_mstr where usr_userid matches "PRF52" exclusive-lock:
assign usr_force_change = no.
end.
This is what I currently have.
UPDATE PUB.usr_mstr SET usr_force_change = 'false' WHERE usr_userid = 'PRF52'
The error that I am receiving is '[DataDirect][OpenEdge JDBC Driver][OpenEdge] Invalid number string (7498)'.
A select statement for this field is working and returns the following.
SELECT usr_force_change FROM PUB.usr_mstr WHERE usr_userid = 'PRF52'
usr_force_change
false
The column data type was of type 'LOGICAL'. This translates to type 'BIT' in SQL. I updated the statement to the following at it worked.
UPDATE PUB.usr_mstr SET usr_force_change = '0' WHERE usr_userid = 'PRF51'
You need to choose Query type as Update Statement when submit update
Update Statement - use this for Inserts and Deletes as well
I have a database with a json field which has multiple parts including one called tags, there are other entries as below but I want to return only the fields with "{"tags":{"+good":true}}".
"{"tags":{"+good":true}}"
"{"has_temps":false,"tags":{"+good":true}}"
"{"tags":{"+good":true}}"
"{"has_temps":false,"too_long":true,"too_long_as_of":"2016-02-12T12:28:28.238+00:00","tags":{"+good":true}}"
I can get part of the way there with this statement in my where clause trips.metadata->'tags'->>'+good' = 'true' but that returns all instances where tags are good and true including all entries above. I want to return entries with the specific statement "{"tags":{"+good":true}}" only. So taking out the two entries that begin has_temps.
Any thoughts on how to do this?
With jsonb column the solution is obvious:
with trips(metadata) as (
values
('{"tags":{"+good":true}}'::jsonb),
('{"has_temps":false,"tags":{"+good":true}}'),
('{"tags":{"+good":true}}'),
('{"has_temps":false,"too_long":true,"too_long_as_of":"2016-02-12T12:28:28.238+00:00","tags":{"+good":true}}')
)
select *
from trips
where metadata = '{"tags":{"+good":true}}';
metadata
-------------------------
{"tags":{"+good":true}}
{"tags":{"+good":true}}
(2 rows)
If the column's type is json then you should cast it to jsonb:
...
where metadata::jsonb = '{"tags":{"+good":true}}';
If I get you right, you can check text value of the "tags" key, like here:
select true
where '{"has_temps":false,"too_long":true,"too_long_as_of":"2016-02-12T12:28:28.238+00:00","tags":{"+good":true}}'::json->>'tags'
= '{"+good":true}'
I am testing out how JSON works in PostgreSQL 9.4 and I'm finding it to be really cool so far.
I'm stuck on one part though. I'm hoping it is possible to run a SQL UPDATE statement on JSON data.
What I was trying to see if I could do was have a Nested Set inside JSON data and Update the left and right when I add a comment.
My query is:
UPDATE
comments
SET
comment #>> '{right}' += 2
WHERE
comment #>> '{post_id}' = '{$input['post_id']}'
AND comment#>>'{right}' >= '{$parent->right}'
I do get an error:
Syntax error: 7 ERROR: syntax error at or near "#>>"
LINE 5: comment#>>'{right}' += 2
I've not been able to find a resource that tells me if it's possible to update an item inside the JSON.
Thank you
Updating JSON Data
If the column in your table contains json data and you want to update this data, you can use the following structure:
UPDATE table_name SET column_name = '{"key" : value}'::jsonb
WHERE column_name::jsonb #> '{“new_key” : new_value}'::jsonb;
Note: Usually #> is used as the "contains" operator.