SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayReduce (children 1)
     ExpressionList (children 3)
      Literal \'groupUniqArrayIf\'
      Literal Array_[\'---\', \'---\', \'t1\']
      Literal Array_[UInt64_1, UInt64_1, UInt64_0]
