CreateQuery table_for_rename_nested (children 3)
 Identifier table_for_rename_nested
 Columns definition (children 1)
  ExpressionList (children 4)
   ColumnDeclaration date (children 1)
    DataType Date
   ColumnDeclaration key (children 1)
    DataType UInt64
   ColumnDeclaration n (children 1)
    DataType Nested (children 1)
     ExpressionList (children 2)
      NameTypePair x (children 1)
       DataType UInt32
      NameTypePair y (children 1)
       DataType String
   ColumnDeclaration value1 (children 1)
    DataType Array (children 1)
     ExpressionList (children 1)
      DataType Array (children 1)
       ExpressionList (children 1)
        DataType LowCardinality (children 1)
         ExpressionList (children 1)
          DataType String
 Storage definition (children 3)
  Function MergeTree (children 1)
   ExpressionList
  Identifier date
  Identifier key