InsertQuery   (children 2)
 Identifier test
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 4)
    ExpressionList (children 1)
     Function multiply (alias num2) (children 1)
      ExpressionList (children 2)
       Identifier number
       Literal UInt64_2
    ExpressionList (children 2)
     Identifier number
     Identifier num2
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       TableIdentifier system.numbers
    Literal UInt64_3