Postgresql Select from values in array -

i converting multiple rows in array using array_agg() function, , need give array select statements condition.

my query is,

select * table id =    all(select array_agg(id) table some_condition)

but gives error, how can on come it..

the error has been cleared type casting array, using query this

 select * table id =      all((select array_agg(id) table some_condition)::bigint[])

Bready