On Thursday, September 17, 2015, Антон Бушмелев <bushmelev...@gmail.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.

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