Your English is fine. @< is an "array is contained by" operator:
http://www.postgresql.org/docs/9.4/interactive/functions-array.html I assume that field1 is an array, as opposed to just a simple value variable. A simple value variable would be tested with something like: field1 IN ( subquery) . The @< tests that every value in the array field1 is also in the subquery. The subquery might contain other values, but it will contain _all_ values in field1. On Thu, Sep 17, 2015 at 8:10 AM, Антон Бушмелев <bushmelev...@gmail.com> wrote: > Hello, google nothing for @ operator =(, what does this mean field1 <@ > ( subquery ) ? > > > ps: sorry for my english > -- Schrodinger's backup: The condition of any backup is unknown until a restore is attempted. Yoda of Borg, we are. Futile, resistance is, yes. Assimilated, you will be. He's about as useful as a wax frying pan. 10 to the 12th power microphones = 1 Megaphone Maranatha! <>< John McKown
