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Thread: Alter Column from inet to inet[]

Alter Column from inet to inet[]

From

Alex -

Date:

14 March 2012, 16:05:59

Hi,

I need to change a column type from inet to inet[] but the alter command always gives me the following errors

ERROR: column "access_ip" cannot be cast to type inet[]

ALTER TABLE users ALTER COLUMN access_ip SET DATA TYPE inet[] USING access_ip::inet[];

Tried various but no luck. Couldn't find anything in the manuals either.

Can anyone point me in the right direction or tell me what's wrong with my statement.

Thanks for any help.

Alex

Re: Alter Column from inet to inet[]

From

Tom Lane

Date:

14 March 2012, 16:17:14

Alex - <aintokyo@hotmail.com> writes:
> Hi,I need to change a column type from inet to inet[] but the alter command always gives me the following errors
> ERROR:  column "access_ip" cannot be cast to type inet[]
> ALTER TABLE users ALTER COLUMN access_ip SET DATA TYPE inet[] USING access_ip::inet[];

The problem is precisely that the system lacks a cast from inet to inet[].
Telling it to apply a cast it hasn't got doesn't help.  What you need to
do is show how to construct the new column values.  Try something like
    USING ARRAY[access_ip]

            regards, tom lane