Thread: to_timestamp error between postgres version 8.3 and 9.2

Technical Doubts <online.technicaldoubts@gmail.com> writes:
> insert into registers_info (regid,transid,regdate,canceldate) values
> ('reg1',1,to_timestamp('2013-07-24','yyyy-MM-dd
> hh24:mi:ss')::TIMESTAMP,to_timestamp('null','yyyy-MM-dd
> hh24:mi:ss')::TIMESTAMP);

> The above query works fine in Postgres 8.3 version.

> But the same query when executed in postgres 9.2 its throwing below error

> ERROR: invalid value "null" for "yyyy"
> Detail: Value must be an integer.

Yup.  It was never intended that 'null' would be valid input for
to_timestamp, and that's thrown an error since 8.4.  See thread here:
http://www.postgresql.org/message-id/37ed240d0808291839t21e19956mdfbdc80aeb1b3c19@mail.gmail.com

A quick test says that 8.3 and older did this:

regression=# select to_timestamp('null','yyyy-MM-dd hh24:mi:ss');
       to_timestamp
---------------------------
 0001-01-01 00:00:00-05 BC
(1 row)

which can hardly be considered a sane interpretation of 'null', even
if we wanted to accept that input.

            regards, tom lane

I think it's only a syntax problem :

to_timestamp('null','yyyy-MM-ddhh24:mi:ss')::TIMESTAMP

In this form your 'null' parameter is a text which dont match for your
definition, so the function is waiting for an integer representing the
year and fails.

But if you write :

to_timestamp(null,'yyyy-MM-ddhh24:mi:ss')::TIMESTAMP

the function return a NULL value.

Hope it helps.


Le 31/08/2013 07:19, Technical Doubts a écrit :
>
> Dear Team,
>
> I have a table with name registers_info with below columns
>
> regid character varying,
> transid bigint,
> regdate timestamp without time zone,
> canceldate timestamp without time zone
>
>
> insert into registers_info (regid,transid,regdate,canceldate) values
> ('reg1',1,to_timestamp('2013-07-24','yyyy-MM-dd
> hh24:mi:ss')::TIMESTAMP,to_timestamp('null','yyyy-MM-dd
> hh24:mi:ss')::TIMESTAMP);
>
> The above query works fine in Postgres 8.3 version.
>
> But the same query when executed in postgres 9.2 its throwing below error
>
> ERROR: invalid value "null" for "yyyy"
> Detail: Value must be an integer.
>
> From application, this cancel date might have values or it may come as null.
>
> Kindly suggest. Thanks in advance.
>
>
> --
> John