SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.numbers_mt
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier number
     Literal UInt64_1000000
   Literal UInt64_1