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Re: Copying data from one table to another - how to specify fields?

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On 09/03/2011 14:21, Alexander Farber wrote:
Oh it is called "INSERT INTO", thank you!

I still have a problem though:

# select uid, name, mail, created, access from drupal_users;
  uid | name |            mail            |  created   |   access
-----+------+----------------------------+------------+------------
    0 |      |                            |          0 |          0
    1 | Alex | Alexander.Farber@xxxxxxxxx | 1299512207 | 1299751991
(2 rows)

# INSERT INTO drupal_users (uid, name, mail, created, access)
  SELECT user_id, username, user_email, user_regdate, user_lastvisit
    FROM phpbb_users
    WHERE user_id>  50 and length(username)>  0;
ERROR:  duplicate key value violates unique constraint "drupal_users_name_key"

I don't understand, what is wrong with "name" here and
how to find the troublemaking record in my 4700 lines table

Is "drupal_users" a table you created yourself? In a vanilla installation of Drupal, the users table is called just "users".

Anyway, to answer your question, you're trying to insert into drupal_users a value that already exists there, and which is subject to a constraint which allows only one instance of that value. To find the offending value you could do something like this (not tested):

  select * from phpbb_users where exists
  (select 1 from drupal_users
    where drupal_users.name = phpbb_users.name);


Hope this helps,

Ray.

--
Raymond O'Donnell :: Galway :: Ireland
rod@xxxxxx

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