On Thursday, September 17, 2015, Антон Бушмелев <bushmelev(dot)aa(at)gmail(dot)com>
wrote:
> Hello, google nothing for @ operator =(, what does this mean field1 <@
> ( subquery ) ?
>
>
It would depend on what field1 is.
Typically <@ is a contains/contained-by operator. Is this context the
subquery is checked to see if it contains the value of field1.
David J.