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   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.

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   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License, version 2.0, for more details.

   You should have received a copy of the GNU General Public License
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   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */

#ifndef DD_TABLES__COLUMN_STATISTICS_INCLUDED
#define DD_TABLES__COLUMN_STATISTICS_INCLUDED

#include "sql/dd/impl/types/entity_object_table_impl.h"
#include "sql/dd/object_id.h"  // Object_id
#include "sql/dd/string_type.h"
#include "sql/dd/types/column_statistics.h"

namespace dd {

class Dictionary_object;
class Item_name_key;
class Object_key;
class Raw_record;

namespace tables {

///////////////////////////////////////////////////////////////////////////

class Column_statistics final : public Entity_object_table_impl {
 public:
  static const Column_statistics &instance();

  enum enum_fields {
    FIELD_ID = static_cast<uint>(Common_field::ID),
    FIELD_CATALOG_ID,
    FIELD_NAME,
    FIELD_SCHEMA_NAME,
    FIELD_TABLE_NAME,
    FIELD_COLUMN_NAME,
    FIELD_HISTOGRAM,
    FIELD_OPTIONS,
    NUMBER_OF_FIELDS  // Always keep this entry at the end of the enum
  };

  enum enum_indexes {
    INDEX_PK_ID = static_cast<uint>(Common_index::PK_ID),
    INDEX_UK_CATALOG_ID_NAME = static_cast<uint>(Common_index::UK_NAME),
    INDEX_UK_CATALOG_ID_SCHEMA_NAME_TABLE_NAME_COLUMN_NAME
  };

  enum enum_foreign_keys { FK_CATALOG_ID };

  Column_statistics();

  dd::Column_statistics *create_entity_object(
      const Raw_record &) const override;

  static bool update_object_key(Item_name_key *key, Object_id catalog_id,
                                const String_type &name);

  static Object_key *create_key_by_catalog_id(Object_id catalog_id);
};

///////////////////////////////////////////////////////////////////////////

}  // namespace tables
}  // namespace dd

#endif  // DD_TABLES__COLUMN_STATISTICS_INCLUDED