InsertQuery   (children 2)
 Identifier test_alter_on_mutation
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 3)
    ExpressionList (children 3)
     Function toDate (children 1)
      ExpressionList (children 1)
       Literal \'2020-01-07\'
     Identifier number
     Function toString (children 1)
      ExpressionList (children 1)
       Identifier number
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       TableIdentifier system.numbers
    Literal UInt64_100
