Hi,
I've got this query, that I manually run it once a month:
SELECT
uuid,
clientid),
*
FROM
logging
WHERE
logtime
BETWEEN
'201611015'
AND
'201612015'
As you can see, I select a date. So in December, the date will be: *BETWEEN
'201612015' AND '201601015'*, for example.
I always need to run this on the 15th of each month.
I was thinking about creating a PLPGSQL function and a Cron task, so this
task can be automated.
Also, the file must be saved with the date+.csv. Example:
CREATE or REPLACE FUNCTION logextract(date_start integer, date_end integer)
RETURNS void AS $$
begin
execute '
COPY
(
SELECT
uuid,
clientid),
*
FROM
logging
WHERE
logtime
BETWEEN
' || date_start || '
AND
' || date_end || '
)
TO ''/var/lib/postgresql/'|| date_start ||'_logs.csv''';
end
$$ language 'plpgsql';
*Questions:*
1. Why when I run the function manually I get this error?
select logextract(201612015, 201612015);
ERROR: operator does not exist: timestamp without time zone >= integer
LINE 13: BETWEEN
I presume this is wrong: *CREATE or REPLACE FUNCTION logextract(date_start
integer, date_end integer) *- But what should I use instead?
2. To call the function, I have to login to postgres and then run: select
logextract(201612015, 201612015);
How can I do it on cron? because the dates will be different every time.
Thanks
Patrick
