Re: COPY FROM FORMAT CSV FORCE_NULL(*) ?

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От Zhang Mingli
Тема Re: COPY FROM FORMAT CSV FORCE_NULL(*) ?
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Msg-id af477baf-94de-49fa-a783-c07e7bc22258@Spark
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Ответ на Re: COPY FROM FORMAT CSV FORCE_NULL(*) ?  (Andrew Dunstan <andrew@dunslane.net>)
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Hi,


Agree, FORCE_NULL(*) is useful as well as FORCE_NOT_NULL(*).

We can have them both.

They are useful when users copy tables that have many columns. 

Regards,
Zhang Mingli
On Jul 25, 2022, 21:28 +0800, Andrew Dunstan <andrew@dunslane.net>, wrote:

On 2022-07-25 Mo 00:18, jian he wrote:
Hi, there.

copy force null git commit
<https://git.postgresql.org/gitweb/?p=postgresql.git;a=commit;h=3b5e03dca2afea7a2c12dbc8605175d0568b5555>
didn't attach a discussion link. So I don't know if it's already been
discussed.

Current seem you cannot do
    COPY forcetest  FROM STDIN WITH (FORMAT csv,  FORCE_NULL(*));

can we have FORCE_NULL(*)? Since We already have FORCE_QUOTE(*). 


We only started adding discussion links in later years. Here's a link to
the original discussion.


<https://www.postgresql.org/message-id/flat/CAB8KJ%3DjS-Um4TGwenS5wLUfJK6K4rNOm_V6GRUj%2BtcKekL2%3DGQ%40mail.gmail.com>


Offhand I don't see why we shouldn't have this. Someone interested
enough would need to submit a patch.


cheers


andrew


--
Andrew Dunstan
EDB: https://www.enterprisedb.com



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