Re: proposal: searching in array function - array_position

On 3/20/15 2:48 PM, Pavel Stehule wrote:
>
>
> 2015-03-20 18:47 GMT+01:00 Tom Lane <tgl@sss.pgh.pa.us
> <mailto:tgl@sss.pgh.pa.us>>:
>
>     Alvaro Herrera <alvherre@2ndquadrant.com
>     <mailto:alvherre@2ndquadrant.com>> writes:
>     > Pavel Stehule wrote:
>     >> 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.
>
>     I concur; perhaps "offset" was the design intention, but it's wrong.
>     The result should be a subscript.
>
>
> do you have any idea about name for this function? array_position is ok?

+1 on array_position. It's possible at some point we'll actually want 
array_offset that does what it claims.

On another note, you mentioned elsewhere that it's not possible to 
return anything other than an integer. Why can't there be a variation of 
this function that returns an array of ndims-1 that is the slice where a 
value was found?
-- 
Jim Nasby, Data Architect, Blue Treble Consulting
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