From: | Michael Paquier <michael(dot)paquier(at)gmail(dot)com> |
---|---|
To: | Ian Lawrence Barwick <barwick(at)gmail(dot)com> |
Cc: | Andrew Dunstan <andrew(at)dunslane(dot)net>, Payal Singh <payal(at)omniti(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: Review: Patch FORCE_NULL option for copy COPY in CSV mode |
Date: | 2014-03-05 15:03:33 |
Message-ID: | CAB7nPqQ5i3-ccXuPBu6dzP=TRDkTrun++fF4kgAYzvthrmjQyA@mail.gmail.com |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-hackers |
On Wed, Mar 5, 2014 at 11:58 PM, Michael Paquier
<michael(dot)paquier(at)gmail(dot)com> wrote:
> So if we specify both this produces the exact opposite of the default,
> default being an empty string inserted for a quoted empty string and
> NULL inserted for a non-quoted empty string. So yes I'm fine with a
> note on the docs about that, and some more regression tests.
For people who did not get this one, here is a short example:
=# ¥pset null 'null'
Null display (null) is "null".
=# create table aa (a text);
CREATE TABLE
=# COPY aa FROM STDIN WITH (FORMAT csv);
Enter data to be copied followed by a newline.
End with a backslash and a period on a line by itself.
>> ""
>>
>> \.
=# select * from aa;
a
------
null
(2 rows)
=# truncate aa;
TRUNCATE TABLE
Time: 12.149 ms
=# COPY aa FROM STDIN
WITH (FORMAT csv, FORCE_NULL(a), FORCE_NOT_NULL(a));
Enter data to be copied followed by a newline.
End with a backslash and a period on a line by itself.
>> ""
>>
>> \.
Time: 3776.662 ms
=# select * from aa;
a
------
null
(2 rows)
--
Michael
From | Date | Subject | |
---|---|---|---|
Next Message | Pavel Stehule | 2014-03-05 15:08:28 | Re: Fwd: patch: make_timestamp function |
Previous Message | Michael Paquier | 2014-03-05 14:58:47 | Re: Review: Patch FORCE_NULL option for copy COPY in CSV mode |