Re: How to convert a text variable into a timestamp in postgreSQL?

On 06/26/2015 11:41 AM, litu16 wrote:
> I know how to convert a text to timestamp in postgreSQL using
>
> * SELECT to_timestamp('05 Dec 2000', 'DD Mon YYYY')*
>
> but how can I convert a text variable (inside a function) to timestamp??
>
> In my table (table_ebscb_spa_log04) "time" is a character varying column, in
> which I have placed a formated date time (15-11-30 11:59:59.999 PM).
> I have tried this function, in order to convert put the date time text into
> a variable (it always change) and convert it into timestamp...
>
> * CREATE OR REPLACE FUNCTION timediff()
> RETURNS trigger AS
> $BODY$
> DECLARE
> timeascharvar character varying;
> timeastistamp timestamp;
>
> BEGIN
> IF NEW.time_type = 'Lap' THEN
> SELECT t.time FROM table_ebscb_spa_log04 t INTO timeascharvar;
> SELECT to_timestamp('timeascharvar', 'yy-mm-dd HH24:MI:SS.MS') INTO

Lose the quotes on timeascharvar, it is a string already.

So:

SELECT to_timestamp(timeascharvar, 'yy-mm-dd HH24:MI:SS.MS')

> timeastistamp;
> END IF;
> RETURN timeastistamp;
> END
> $BODY$
> LANGUAGE plpgsql VOLATILE
> COST 100;
> ALTER FUNCTION timediff()
> OWNER TO postgres;*
>
> but whenever I run it in the table, it shows this ERROR message...
>
> <http://postgresql.nabble.com/file/n5855346/screenshot.bmp>

I click on the link above I get:

PostgreSQL
File not found
Please contact Nabble Support if you need help.

>
> It seems that "to_timestamp" waits for a number to be the year, how can I
> get it to recognize the variable as if it were numbers?
>
>
>
>
>
> --
> View this message in context: http://postgresql.nabble.com/How-to-convert-a-text-variable-into-a-timestamp-in-postgreSQL-tp5855346.html
> Sent from the PostgreSQL - general mailing list archive at Nabble.com.
>
>

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com