Mike Mascari <mascarm(at)mascari(dot)com> writes:
> Here's something odd I stumbled upon:
> [estore(at)lexus] select now() - '1 day';
> ERROR: invalid input syntax for type timestamp with time zone: "1 day"
What's odd about it? The preferred interpretation is timestamptz minus
another timestamptz (yielding an interval). If you want timestamptz
minus interval (yielding timestamptz), you have to do something to cue
the system that the literal should be taken as an interval.
The "+" cases work because there is no timestamp plus timestamp operator.
regards, tom lane