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* Time Queries
@ 1994-09-01 13:03 David Alan Nelson <D.A.Nelson@newcastle.ac.uk>
1994-09-01 15:53 ` Re: Time Queries Paul M. Aoki <aoki@cs.berkeley.edu>
0 siblings, 1 reply; 2+ messages in thread
From: David Alan Nelson @ 1994-09-01 13:03 UTC (permalink / raw)
To: legacy; +Cc: Neville Smith <n.s.smith@newcastle.ac.uk>
I have a table with a column in it storing time information, i.e. the
column has type abstime. In Postgres 4.1, I need to be able to add
a relative time amount on to this, i.e. using the syntax @ '7' "days",
as stated in the reference manual.
I can not get this to work for either fields of type reltime or type
abstime. Can anybody tell me how to do this.
Cheers
Dave
--
Mail ID : D.A.Nelson@newcastle.ac.uk
Computing Science, University of Newcastle upon Tyne, UK. (091) 222 8789
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^ permalink raw reply [nested|flat] 2+ messages in thread
* Re: Time Queries
1994-09-01 13:03 Time Queries David Alan Nelson <D.A.Nelson@newcastle.ac.uk>
@ 1994-09-01 15:53 ` Paul M. Aoki <aoki@cs.berkeley.edu>
0 siblings, 0 replies; 2+ messages in thread
From: Paul M. Aoki @ 1994-09-01 15:53 UTC (permalink / raw)
To: David Alan Nelson <D.A.Nelson@newcastle.ac.uk>; +Cc: legacy
"David Alan Nelson" <D.A.Nelson@newcastle.ac.uk> writes:
> I have a table with a column in it storing time information, i.e. the
> column has type abstime. In Postgres 4.1, I need to be able to add
> a relative time amount on to this, i.e. using the syntax @ '7' "days",
> as stated in the reference manual.
> I can not get this to work for either fields of type reltime or type
> abstime. Can anybody tell me how to do this.
the only operator like this that's built in is timepl, which is
abstime + reltime. if you want others, you must write/register
them yourself.
faerie:aoki (112)> monitor foo
Welcome to the POSTGRES terminal monitor
Go
* create x (abst = abstime)\g
Query sent to backend is "create x (abst = abstime)"
CREATE
Go
* append x (abst="now")\g
Query sent to backend is "append x (abst="now")"
APPEND 334138
Go
* retrieve (x.all)\g
Query sent to backend is "retrieve (x.all)"
---------------
| abst |
---------------
| Thu Sep 01 15:50:04 1994 GMT|
---------------
Go
* retrieve (t = x.abst + "@ 7 days"::reltime)\g
Query sent to backend is "retrieve (t = x.abst + "@ 7 days"::reltime)"
---------------
| t |
---------------
| Thu Sep 08 15:50:04 1994 GMT|
---------------
Go
*
--
Paul M. Aoki | University of California at Berkeley
aoki@CS.Berkeley.EDU | Dept. of EECS, Computer Science Division (#1776)
| Berkeley, CA 94720-1776
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1994-09-01 13:03 Time Queries David Alan Nelson <D.A.Nelson@newcastle.ac.uk>
1994-09-01 15:53 ` Paul M. Aoki <aoki@cs.berkeley.edu>
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