Technical Doubts <online.technicaldoubts@xxxxxxxxx> 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@xxxxxxxxxxxxxx
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
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