InsertQuery   (children 2)
 Identifier test_ins_arr_arr_null
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 3)
    ExpressionList (children 2)
     Function toDate (children 1)
      ExpressionList (children 1)
       Literal \'2017-10-02\'
     Function array (children 1)
      ExpressionList (children 2)
       Function array (children 1)
        ExpressionList (children 3)
         Literal UInt64_1
         Literal NULL
         Identifier number
       Function array (children 1)
        ExpressionList (children 3)
         Literal UInt64_3
         Literal NULL
         Identifier number
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       TableIdentifier system.numbers
    Literal UInt64_10000