Re: Determine length of numeric field

Hello

probably you have to use a explicit cast

postgres=# select length(10::numeric::text);
length
--------
2
(1 row)

Regards

Pavel Stehule

2011/2/15 Tony Capobianco <tcapobianco(at)prospectiv(dot)com>:
> I'm altering datatypes in several tables from numeric to integer.  In
> doing so, I get the following error:
>
> dw=# \d uniq_hits
>    Table "support.uniq_hits"
>   Column   |  Type   | Modifiers
> ------------+---------+-----------
>  sourceid   | numeric |
>  hitdate    | date    |
>  total      | numeric |
>  hitdate_id | integer |
> Indexes:
>    "uniq_hits_hitdateid_idx" btree (hitdate_id), tablespace
> "support_idx"
> Tablespace: "support"
>
> esave_dw=# alter table uniq_hits alter sourceid type int;
> ERROR:  integer out of range
>
> Sourceid should not be more than 5 digits long.  I'm able to perform
> this query on Oracle and would like something similar on postgres 8.4:
>
> delete from uniq_hits where sourceid in (select sourceid from uniq_hits
> where length(sourceid) > 5);
>
> I haven't had much luck with the length or char_length functions on
> postgres.
>
> Thanks.
> Tony
>
>
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