On 12/14/2016 01:17 PM, Patrick B wrote:
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
The answer is above. Look at your original query at the top of the post.
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
--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx
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