union — set union of input values
collect(any) -> |[any]|
The union aggregate function computes a set union of its input values. If the values are of uniform type, then the output is a set of that type. If the values are of mixed typs, the the output is a set of union of the types encountered.
Average value of simple sequence:
echo '1 2 3 3' | zq -z 'union(this)' -
=>
{union:|[1,2,3]|}
Continuous average of simple sequence:
echo '1 2 3 3' | zq -z 'yield union(this)' -
=>
|[1]|
|[1,2]|
|[1,2,3]|
|[1,2,3]|
Mixed types create a union type for the set elements:
echo '1 2 3 "foo"' | zq -z 'set:=union(this) | yield this,typeof(set)' -
=>
{set:|[1,2,3,"foo"]|}
<|[(int64,string)]|>