SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    Function equals (alias assert_exists) (children 1)
     ExpressionList (children 2)
      Function count (children 1)
       ExpressionList
      Literal UInt64_2
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.events
   Function in (children 1)
    ExpressionList (children 2)
     Identifier name
     Literal Tuple_(\'FilterTransformPassedRows\', \'FilterTransformPassedBytes\')
   Identifier assert_exists
