Postgres SQL - error: must be superuser to copy to or from a file

Question

I have copied function(from one of the webportal and modified accordingly) to copy data from csv file to table.

create or replace function public.load_csv_file
(
target_table text,
csv_path text,
col_count integer
)

returns void as $$

declare

iter integer; -- dummy integer to iterate columns with
col text; -- variable to keep the column name at each iteration
col_first text; -- first column name, e.g., top left corner on a csv file or     spreadsheet

begin
set schema 'public';

create table insert_from_csv ();

-- add just enough number of columns
for iter in 1..col_count
loop
    execute format('alter table insert_from_csv add column col_%s text;', iter);
end loop;

-- copy the data from csv file
execute format('copy insert_from_csv from %L with delimiter '','' quote ''"'' csv ', csv_path);

iter := 1;
col_first := (select col_1 from insert_from_csv limit 1);

-- update the column names based on the first row which has the column names
for col in execute format('select unnest(string_to_array(trim(temp_table::text, ''()''), '','')) from temp_table where col_1 = %L', col_first)
loop
    execute format('alter table insert_from_csv rename column col_%s to %s', iter, col);
    iter := iter + 1;
end loop;

-- delete the columns row
execute format('delete from insert_from_csv where %s = %L', col_first, col_first);

-- change the temp table name to the name given as parameter, if not blank
if length(target_table) > 0 then
    execute format('alter table insert_from_csv rename to %I', target_table);
end if;

end;

$$ language plpgsql;

And passing parameters as

select load_csv_file('Customer','C:\Insert_postgres.csv' ,4)

but getting error message

ERROR: must be superuser to COPY to or from a file Hint: Anyone can COPY to stdout or from stdin. psql's \copy command also works for anyone.

The idea is, i will create a automated test, and if i want to test on different instance then test should automatically create function and copy data from csv file. Is there any work around to copy data without superuser?

Answer 1

Looks Insert_postgres.csv is in C drive which usually does not have Read/Write permission. Move the file to your directory where Read/Write given atleast to some groups or everyone. Hope it will resolve the issue