Re: Script errors on run

[Ralph Smith <smithrn@xxxxxxxxxxxxxx>]

On Jun 4, 2008, at 2:56 PM, Stephan Szabo wrote:

On Wed, 4 Jun 2008, Ralph Smith wrote:

  -- ==========================================

  good_date := to_date(year||'-'||month||'-'||day , 'YYYY-MM-DD') ;

  RAISE NOTICE 'good_date =  %',good_date ;

  Usecs := EXTRACT(EPOCH FROM TIMESTAMP good_date) ;

END ;

QUERY:  SELECT  EXTRACT(EPOCH FROM TIMESTAMP  $1 )

CONTEXT:  SQL statement in PL/PgSQL function "usecs_from_date" near

line 92

Is this not a programmable extraction???

I'm missing something here.

=============================

TIMESTAMP '...' describes a timestamp literal.

If you wanted to explicitly cast the value in good_date as a timestamp,
you'd probably want CAST(good_date AS TIMESTAMP).

If good_date is of type date, however, I believe the cast to timestamp is
implicit, so you should probably be able to just use extract(epoch from
good_date).

=============================================

Well I cleaned things up a bit, but I'm still getting stuck on that EXTRACT command:

The following is the script in file:  library_date.sql

CREATE OR REPLACE FUNCTION usecs_from_date(given_date varchar) RETURNS int  AS

$$

/* given_date   Must be of the format 'YYYY-MM-DD', however single digit

                months and days are allowed (are handled here).

                If a single digit year is used then this function will assume 200X as the year.

                If a double digit year is used then numbers >= 70 are assumed to be 19XX.

                Three digit years are not allowed.

*/

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   timestamp ;

  UsecsD      double precision ;

  Usecs       int ;

BEGIN

--  CLEANSING CODE HERE

  -- ==========================================

  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 ;

  UsecsD := EXTRACT(EPOCH FROM TIMESTAMP 'good_date') ;

  

  Usecs := CAST(UsecsD AS INT) ;

  RETURN Usecs ;

  

END ;

  

$$ LANGUAGE plpgsql ;

*****************************

This is 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:  date_string =  2008-06-04

INFO:  good_date =  2008-06-04 00:00:00

ERROR:  invalid input syntax for type timestamp: "good_date"

CONTEXT:  SQL statement "SELECT  EXTRACT(EPOCH FROM TIMESTAMP 'good_date')"

PL/pgSQL function "usecs_from_date" line 96 at assignment

airburst=#