SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function COUNT (children 1)
     ExpressionList
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test
   Function and (children 1)
    ExpressionList (children 2)
     Function lessOrEquals (children 1)
      ExpressionList (children 2)
       Identifier key
       Literal UInt64_100000
     Function not (children 1)
      ExpressionList (children 1)
       Function in (children 1)
        ExpressionList (children 2)
         Function toLowCardinality (children 1)
          ExpressionList (children 1)
           Literal \'\'
         Subquery (children 1)
          SelectWithUnionQuery (children 1)
           ExpressionList (children 1)
            SelectQuery (children 1)
             ExpressionList (children 1)
              Literal \'\'