Re: Can't "EXTRACT" from a field?

On 22 Nov 2001 at 11:18 (-0500), Marc G. Fournier wrote:
| On Thu, 22 Nov 2001, Brent Verner wrote:
| 
| > On 22 Nov 2001 at 10:02 (-0500), Marc G. Fournier wrote:
| > |
| > | Simple, really ... using v7.2b3 that hasn't been released yet ...
| > |
| > | traf_stats=# select EXTRACT(WEEK FROM TIMESTAMP runtime) from hourly_stats;
| > | ERROR:  parser: parse error at or near "runtime"
| >
| > The following works for me (on 7.2b3).
| >
| >   create table test( id serial, tid timestamp default now() );
| >   select extract(week from tid) from test;
| >
| >
| > gram.y has
| >   extract_list:  extract_arg FROM a_expr
| >
| > which appears to be in keeping with the sql99 def.
| >   part2-         <extract expression> ::=
| >   part2:              EXTRACT <left paren> <extract field>
| >   part2-                  FROM <extract source> <right paren>
| >
| >
| > I don't know if there was ever any other format for extract(), but
| > things look normal from here.
| 
| ya, I hadn't clued in until fighting with it some more that if the fieldis
| already a timestamp, yyou don't have to put it in as 'EXTRACT(WEEK FROM
| TIMESTAMP tid) :(

I didn't even know what the args to extract were, which is how I ended
up in gram.y...

note: extract() is correctly not listed as a function, but it doesn't      have any '\h' help available.  Is this a
TODOkind-of-thing?  If     it is I can try to add it sometime later today.  There is not
 
note2: This documentation is incorrect as of last night's cvs.     an example given in the docs is.       SELECT
EXTRACT(CENTURYFROM TIMESTAMP '2001-02-16 20:38:40');     I can go ahead and update func.sgml if noone else is already
  getting it.
 

| > btw Marc, can you help me in getting archives of the various lists?
| 
| they are all at archives.postgresql.org ... no?

Not that I see.  archives. points at www2.us.

I ftp'd around every postgresql.org (and hub.org) anonftp server
I could find, and sent an 'index' command to majordomo, and it has
/some/ files listed, but I could not ever retreive those files...

I'm really looking forward to having locally (mutt!!) searchable
docs...

Did you ever get the documentation issue worked out?  Is there anything
I can do to help with that?  I did get man.tar and postgres.tar built
from cvs on my debian box.

Thanks, Brent

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