InsertQuery   (children 3)
 Identifier test_table
 ExpressionList (children 2)
  Identifier timestamp
  Identifier value
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 2)
    ExpressionList (children 2)
     Function toDateTime (children 1)
      ExpressionList (children 1)
       Literal \'2020-01-02 12:00:00\'
     Literal UInt64_1
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       Function numbers (children 1)
        ExpressionList (children 1)
         Literal UInt64_10