Same problem, see below
--------------------------------
On Jun 4, 2008, at 3:30 PM, Stephan Szabo wrote:
> On Wed, 4 Jun 2008, Ralph Smith wrote:
>
>> date_string := to_date(year||'-'||month||'-'||day , 'YYYY-MM-DD') ;
>> RAISE INFO 'date_string = %', date_string ;
>> good_date := to_timestamp(date_string, 'YYYY-MM-DD') ;
>> RAISE INFO 'good_date = %', good_date ;
>
> This seems like alot of extra work, due to the implicit cast from
> date to
> timestamp. I think
> good_date := to_date(year || '-' || month || '-' || day, 'YYYY-MM-DD')
> might work and just be simpler.
>
>> UsecsD := EXTRACT(EPOCH FROM TIMESTAMP 'good_date') ;
>
> If good_date's already a timestamp, I think this should just be:
> EXTRACT(EPOCH FROM good_date)
=========================================
*************************
The code:
DECLARE
year varchar ;
month varchar ;
day varchar ;
pslash1 int ;
pslash2 int ;
year_len int ;
month_len int ;
day_len int ;
date_string varchar ;
good_date date ;
UsecsD double precision ;
Usecs int ;
BEGIN
-- My cleansing code here
-- ==========================================
good_date := to_date(year||'-'||month||'-'||day , 'YYYY-MM-DD') ;
RAISE INFO 'good_date = %', good_date ;
UsecsD := EXTRACT(EPOCH FROM DATE 'good_date') ;
Usecs := CAST(UsecsD AS INT) ;
RETURN Usecs ;
END ;
$$ LANGUAGE plpgsql ;
-
*************************
Here's what I'm getting now:
smithrn@flexo:~/PL-SQL$ psql -U airburst airburst
Welcome to psql 8.2.6, the PostgreSQL interactive terminal.
Type: \copyright for distribution terms
\h for help with SQL commands
\? for help with psql commands
\g or terminate with semicolon to execute query
\q to quit
airburst=# \i misc.sql \i library_date.sql
CREATE FUNCTION
CREATE FUNCTION
airburst=# select usecs_from_date('2008-06-04');
INFO: good_date = 2008-06-04
ERROR: invalid input syntax for type date: "good_date"
CONTEXT: SQL statement "SELECT EXTRACT(EPOCH FROM DATE 'good_date')"
PL/pgSQL function "usecs_from_date" line 92 at assignment
airburst=#
