On 01/24/2013 08:47 AM, Steve Clark wrote:
> Hi list,
>
> This may be really simple - I usually do it using a procedural language
> such as php or a bash script.
>
> Say I have a table that has 2 columns like
> create table "foo" (
> id integer not null,
> name text
> );
> CREATE UNIQUE INDEX "foo_pkey" on "foo" using btree ( "id" "int4_ops" );
>
> with 10 rows of data where id is 1 to 10.
>
> Now I want to insert a new row ahead of id 5 so I have to renumber the rows
> from 5 to 10 increasing each by one.
>
> Or the opposite I want to delete a row an renumber to close up the gap.
>
> Is there an easy way to do this in postgresql without resulting to some
> external language?
I can see this taking a lot of overhead as the table increases.
I guess it comes down to what you are trying to achieve?
Do you want a gapless sequence?
Do you want a ROWNUM?
Something else?
>
> Thanks for your consideration.
>
>
>
--
Adrian Klaver
adrian.klaver@gmail.com
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