Re: NULL safe equality operator - Mailing list pgsql-hackers

From Christopher Kings-Lynne
Subject Re: NULL safe equality operator
Date
Msg-id 4386C616.6090500@familyhealth.com.au
Whole thread Raw
In response to Re: NULL safe equality operator  (Michael Glaesemann <grzm@myrealbox.com>)
Responses Re: NULL safe equality operator  (Michael Glaesemann <grzm@myrealbox.com>)
Re: NULL safe equality operator  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-hackers
> test=# select null_safe_cmp (NULL,NULL);
> ERROR:  could not determine anyarray/anyelement type because input  has 
> type "unknown"
> test=# select null_safe_cmp (NULL::integer,NULL::integer);
> null_safe_cmp
> ---------------
>              1
> (1 row)
> 
> Same casting problem due to anyelement, of course.

Yes - I wonder what the trick to getting around that is?

Chris



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