CreateQuery t_nested_modify (children 3)
 Identifier t_nested_modify
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration id (children 1)
    DataType UInt64
   ColumnDeclaration n.a (children 1)
    DataType Array (children 1)
     ExpressionList (children 1)
      DataType UInt32
   ColumnDeclaration n.b (children 1)
    DataType Array (children 1)
     ExpressionList (children 1)
      DataType String
 Storage definition (children 3)
  Function MergeTree
  Identifier id
  Set
