"hstoredata" is a variable of type hstore which contains key value pairs.
i.e. for ex: "hstoredata" variable contains the key value pairs '"ed"=>"1", "id"=>"1", "age"=>"27"'.
If "hstoredata" variable is passed to the function i.e select sampletest(hstoredata), function is returning as null.
-- Function: sampletest(hstore)
-- DROP FUNCTION sampletest(hstore)
CREATE OR REPLACE FUNCTION sampletest(hstoredata hstore)
RETURNS SETOF void AS
$BODY$
DECLARE
newhstoredata hstore;
BEGIN
newhstoredata := samplehstore(hstoredata);
RAISE NOTICE 'newhstoredata: %', newhstoredata;
END;
$BODY$
LANGUAGE plpgsql VOLATILE
COST 100
ROWS 1000;
ALTER FUNCTION sampletest(hstore)
OWNER TO postgres;
Below is the program for function samplehstore(hstore)
-- Function: samplehstore(hstore)
-- DROP FUNCTION samplehstore(hstore)
CREATE OR REPLACE FUNCTION samplehstore(hstoredata hstore)
RETURNS SETOF void AS
$BODY$
BEGIN
RAISE NOTICE 'hstoredata: %', hstoredata;
END;
$BODY$
LANGUAGE plpgsql VOLATILE
COST 100
ROWS 1000;
ALTER FUNCTION samplehstore(hstore)
OWNER TO postgres;
It's unclear what you're asking precisely, but based on the title, I assume you'd like your function to return something.
If so, the issue here is that you're declaring your function as returning setof void.
Declare it as returning whatever it should, and use return ... or return query ..., depending on what you actually need.
Related
I have created a function to delete multiple records.In our table contain id as type uuid.
We get the input is like array of ids.
CREATE OR REPLACE FUNCTION public.deletetVersion(item_list uuid[])
RETURNS TABLE(id uuid[])
LANGUAGE 'plpgsql'
COST 100
VOLATILE PARALLEL UNSAFE
ROWS 1000
AS $BODY$
BEGIN
RETURN QUERY
DELETE FROM version WHERE id = ANY(item_list);
END;
$BODY$;
SELECT * from deletetVersion(Array['b6ad1912-e4f1-4419-831a-c70df89ffd63','877898f0-2f3f-4890-a658-898e35ffee3a'])
But i got an error like:
Anyone please help me
ERROR: function deletetversion(text[]) does not exist
it is because the
Array['b6ad1912-e4f1-4419-831a-c70df89ffd63','877898f0-2f3f-4890-a658-898e35ffee3a']
is treated as text[]
try the following
Array['b6ad1912-e4f1-4419-831a-c70df89ffd63'::uuid,'877898f0-2f3f-4890-a658-898e35ffee3a'::uuid]
as a parameter to your function
for example
CREATE OR REPLACE FUNCTION public.test_uuid(item_list uuid[])
RETURNS TABLE(id uuid[])
LANGUAGE 'plpgsql'
COST 100
VOLATILE PARALLEL UNSAFE
ROWS 1000
AS $BODY$
BEGIN
RETURN QUERY
SELECT item_list;
END;
$BODY$;
SELECT * from test_uuid(Array['b6ad1912-e4f1-4419-831a-c70df89ffd63'::uuid])
In case of deletion
CREATE OR REPLACE FUNCTION public.test_uuid(item_list uuid[])
RETURNS VOID
LANGUAGE 'plpgsql'
COST 100
VOLATILE PARALLEL UNSAFE
ROWS 1000
AS $BODY$
BEGIN
RETURN QUERY
DELETE from tableName WHERE id = ANY(item_list);
END;
$BODY$;
Your function should return either setof uuid - i.e. a table of uuid-s - or uuid[]. I would prefer the first. You do not need PL/pgSQL, plain SQL is enough. So the function is:
create or replace function public.deletetVersion(item_list uuid[])
returns setof uuid language 'sql' as
$$
delete from version where id = any(item_list) returning id;
$$;
The version returning an array is a bit more complex:
create or replace function public.deletetVersion(item_list uuid[])
returns uuid[] language 'sql' as
$$
with t(d_id) as
(
delete from version where id = any(item_list) returning id
)
select array_agg(d_id) from t;
$$;
And - as #Ibrahimshamma says - you may need to cast the argument to uuid[].
Below is my function, even after having a RETURN statement, but a
query has no destination for result data
error is thrown. Am I missing something?
CREATE OR REPLACE FUNCTION test(ulds character varying)
RETURNS boolean AS
$BODY$
DECLARE
val_result boolean;
BEGIN
select * from regexp_split_to_array('BLK&AAK&AKE', '&');
SET val_result = false;
RETURN val_result;
END;
$BODY$
LANGUAGE plpgsql VOLATILE
COST 100;
ALTER FUNCTION test(character varying)
There are more than one issues:
Result of unbind queries is not result of function in Postgres. You need to use INTO clause.
regexp_split_to_array is scalar function, there is not any reason to call this function from SELECT statement. Use SELECT only when you take result of table function, or when you need to read data from relations.
assign statement in plpgsql is based on := symbol. The command SET is used for something different.
the type text is proffered against varchar for function's parameters.
So your code can looks like:
CREATE OR REPLACE FUNCTION test(ulds text)
RETURNS boolean AS $$
DECLARE
result boolean;
target text[];
BEGIN
-- suboptimal, don't do this!!!
SELECT regexp_split_to_array('BLK&AAK&AKE', '&') INTO target;
-- preferred
target := regexp_split_to_array('BLK&AAK&AKE', '&');
result := true;
RETURN result;
END;
$$ LANGUAGE plpgsql;
I'm currently doing a test in PostgreSQL using PGTAP.
In order to minimize redundancy in my code I placed duplicate code inside a
function. I have functions that both returns a SETOF TEXT.
CREATE FUNCTION _create_common_test(
this_argument varchar
) RETURNS SETOF TEXT AS $$
DECLARE
RETURN NEXT IS(this_argument, 'i_am_argument1', 'Checking Argument 1');
MORE RETURN NEXT STATEMENTS HERE....
END;
$$ LANGUAGE plpgsql;
CREATE FUNCTION test_create_common_test_1() RETURNS SETOF TEXT AS $$
BEGIN
RETURN NEXT _create_common_test('i_am_argument1');
END
$$ LANGUAGE plpgsql;
CREATE FUNCTION test_create_common_test_2() RETURNS SETOF TEXT AS $$
BEGIN
RETURN NEXT _create_common_test('i_am_argument2');
END
$$ LANGUAGE plpgsql;
test_create_common_test_1 and test_create_common_test_2 calls the same function _create_common_test() inside their function varying only in the value passed in the argument.
As for my question, Is it possible to return the returned value of _create_common_test() which is a SETOF TEXT in the functions test_create_common_test_1 and test_create_common_test_2?
I have tried using PERFORM _create_common_test('i_am_argument2'),
CREATE FUNCTION test_create_common_test_2() RETURNS SETOF TEXT AS $$
BEGIN
PERFORM _create_common_test('i_am_argument2');
END
$$ LANGUAGE plpgsql;
but it does not enumerate the results I had inside the _create_common_test().
As correctly answered by #a_horse_with_no_name in the comments:
return query select * from _create_common_test('i_am_argument2');
How to modify existing function to return all rows from table sd_users?
CREATE OR REPLACE FUNCTION getusers()
RETURNS sd_users AS
$BODY$
DECLARE
groups sd_users;
BEGIN
SELECT * INTO groups FROM sd_users;
RETURN groups;
END;
$BODY$
LANGUAGE plpgsql VOLATILE
COST 100;
ALTER FUNCTION getusers()
OWNER TO postgres;
Invoke the function code:
SELECT getusers()
This code returns only first record, how to make it to return all records?
You are looking for setof. And it can be plain SQL in instead of plpgsql
create or replace function getusers()
returns setof sd_users as $body$
select * from sd_users;
$body$ language sql stable
I've got a pretty simple function defined like so:
CREATE OR REPLACE FUNCTION create_new_order(....) RETURNS integer AS
$BODY$
BEGIN
PERFORM add_points_to_usage(client_id_p, date_in_p, total_points_p);
INSERT INTO orders (...) VALUES (...)
RETURNING ident;
END;
$BODY$ LANGUAGE plpgsql;
Where I'm struggling is how to actually RETURN the value stored in the ident field back via the RETURNING clause. I've tried setting the value to a variable but that either doesn't work or I'm just messing up the syntax.
You're missing the variable declaration, the INTO clause and the final RETURN:
CREATE OR REPLACE FUNCTION create_new_order(....) RETURNS integer AS
$BODY$
DECLARE
var_ident int;
BEGIN
PERFORM add_points_to_usage(client_id_p, date_in_p, total_points_p);
INSERT INTO orders (...) VALUES (...)
RETURNING ident INTO var_ident;
RETURN var_ident;
END;
$BODY$ LANGUAGE plpgsql;