Re: proposal: searching in array function - array_position - Mailing list pgsql-hackers

From Alvaro Herrera
Subject Re: proposal: searching in array function - array_position
Date
Msg-id 20150320172942.GX3636@alvh.no-ip.org
Whole thread Raw
In response to Re: proposal: searching in array function - array_position  (Pavel Stehule <pavel.stehule@gmail.com>)
Responses Re: proposal: searching in array function - array_position  (Pavel Stehule <pavel.stehule@gmail.com>)
Re: proposal: searching in array function - array_position  (Tom Lane <tgl@sss.pgh.pa.us>)
Re: proposal: searching in array function - array_position  (Pavel Stehule <pavel.stehule@gmail.com>)
List pgsql-hackers
Pavel Stehule wrote:
> 2015-03-20 17:49 GMT+01:00 Dean Rasheed <dean.a.rasheed@gmail.com>:
> 
> > There's an issue when the array's lower bound isn't 1:
> >
> > select array_offset('[2:4]={1,2,3}'::int[], 1);
> >  array_offset
> > --------------
> >             1
> > (1 row)
> >
> > whereas I would expect this to return 2. Similarly for
> > array_offsets(), so the offsets can be used as indexes into the
> > original array.
> >
> 
> I am thinking, so it is ok - it returns a offset, not position.

So you can't use it as a subscript?  That sounds unfriendly.  Almost
every function using this will be subtly broken.

-- 
Álvaro Herrera                http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services



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