Bug in 8.1.5: cannot add literal timestamp value and a interval.

Hi:

This is a regression bug between 8.1.4 and 8.1.5

'2006-10-20 00:00:00' + interval '5' second

With 8.1.4, the following worked fine. However with
8.1.5, this
gives the following error.

test=# select ('2006-10-20 00:00:00' + interval '5'
second) ;
ERROR: invalid input syntax for type interval:
"2006-10-20 00:00:00"

With 8.1.5, the following works:

test=# select (timestamp '2006-10-20 00:00:00' +
interval '5' second);
?column?
---------------------
2006-10-20 00:00:05
(1 row)

As you can see, we have to specify 'timestamp' before
a literal
timestamp value. That's pretty hokey. Is this a bug or
am I
missing something (and if so, why did a literal
timestamp value not
preceded by "timestamp" work fine in earlier versions
of postgres)?

Best regards,
--j

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