| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | "Lane Van Ingen" <lvaningen(at)esncc(dot)com> |
| Cc: | "John DeSoi" <desoi(at)pgedit(dot)com>, pgsql-novice(at)postgresql(dot)org |
| Subject: | Re: Date Arithmetic in PL/pgSql |
| Date: | 2005-08-09 01:19:05 |
| Message-ID: | 11102.1123550345@sss.pgh.pa.us |
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| Lists: | pgsql-novice |
"Lane Van Ingen" <lvaningen(at)esncc(dot)com> writes:
> My code says:
> select date_trunc('seconds',localtimestamp)::timestamp -
> neighbor_seconds::integer;
> ERROR: operator does not exist: timestamp without time zone - integer
Right. What you need is to use the operators that are there, which
are timestamp minus interval and number times interval:
select date_trunc('seconds',localtimestamp) - neighbor_seconds * '1 second'::interval;
The two casts you did write are both pointless, as the given values were
already of those datatypes.
regards, tom lane
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