InsertQuery   (children 2)
 Identifier large_alter_table_00926
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 3)
    ExpressionList (children 3)
     Function toDate (children 1)
      ExpressionList (children 1)
       Literal \'2019-01-01\'
     Identifier number
     Function toString (children 1)
      ExpressionList (children 1)
       Function plus (children 1)
        ExpressionList (children 2)
         Identifier number
         Function rand (children 1)
          ExpressionList
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       TableIdentifier system.numbers
    Literal UInt64_300000
