index.h

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/* Copyright (c) 2014, 2023, Oracle and/or its affiliates.
 
   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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   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
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   separately licensed software that they have included with MySQL.
 
   This program is distributed in the hope that it will be useful,
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   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
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
 
#ifndef DD__INDEX_INCLUDED
#define DD__INDEX_INCLUDED
 
#include "lex_string.h"
#include "my_inttypes.h"
#include "sql/dd/collection.h"           // dd::Collection
#include "sql/dd/sdi_fwd.h"              // dd::Sdi_rcontext
#include "sql/dd/sdi_fwd.h"              // dd::Sdi_wcontext
#include "sql/dd/types/entity_object.h"  // dd::Entity_object
 
namespace dd {
 
///////////////////////////////////////////////////////////////////////////
 
class Column;
class Index_impl;
class Index_element;
class Object_table;
class Properties;
class Table;
 
namespace tables {
class Indexes;
}
 
///////////////////////////////////////////////////////////////////////////
 
class Index : virtual public Entity_object {
 public:
  typedef Collection<Index_element *> Index_elements;
  typedef Index_impl Impl;
  typedef tables::Indexes DD_table;
 
 public:
  enum enum_index_type  // similar to Keytype in sql_class.h but w/o FOREIGN_KEY
  { IT_PRIMARY = 1,
    IT_UNIQUE,
    IT_MULTIPLE,
    IT_FULLTEXT,
    IT_SPATIAL };
 
  enum enum_index_algorithm  // similar to ha_key_alg
  { IA_SE_SPECIFIC = 1,
    IA_BTREE,
    IA_RTREE,
    IA_HASH,
    IA_FULLTEXT };
 
 public:
  ~Index() override = default;
 
  /**
    Dummy method to be able to use Partition_index and Index interchangeably
    in templates.
  */
  const Index &index() const { return *this; }
 
  Index &index() { return *this; }
 
  /////////////////////////////////////////////////////////////////////////
  // Table.
  /////////////////////////////////////////////////////////////////////////
 
  virtual const Table &table() const = 0;
 
  virtual Table &table() = 0;
 
  /////////////////////////////////////////////////////////////////////////
  // is_generated
  /////////////////////////////////////////////////////////////////////////
 
  virtual bool is_generated() const = 0;
  virtual void set_generated(bool generated) = 0;
 
  /////////////////////////////////////////////////////////////////////////
  // hidden.
  /////////////////////////////////////////////////////////////////////////
 
  virtual bool is_hidden() const = 0;
  virtual void set_hidden(bool hidden) = 0;
 
  /////////////////////////////////////////////////////////////////////////
  // comment.
  /////////////////////////////////////////////////////////////////////////
 
  virtual const String_type &comment() const = 0;
  virtual void set_comment(const String_type &comment) = 0;
 
  /////////////////////////////////////////////////////////////////////////
  // Options.
  /////////////////////////////////////////////////////////////////////////
 
  virtual const Properties &options() const = 0;
 
  virtual Properties &options() = 0;
  virtual bool set_options(const Properties &options) = 0;
  virtual bool set_options(const String_type &options_raw) = 0;
 
  /////////////////////////////////////////////////////////////////////////
  // se_private_data.
  /////////////////////////////////////////////////////////////////////////
 
  virtual const Properties &se_private_data() const = 0;
 
  virtual Properties &se_private_data() = 0;
  virtual bool set_se_private_data(const String_type &se_private_data_raw) = 0;
  virtual bool set_se_private_data(const Properties &se_private_data) = 0;
 
  /////////////////////////////////////////////////////////////////////////
  // Tablespace.
  /////////////////////////////////////////////////////////////////////////
 
  virtual Object_id tablespace_id() const = 0;
  virtual void set_tablespace_id(Object_id tablespace_id) = 0;
 
  /////////////////////////////////////////////////////////////////////////
  // Engine.
  /////////////////////////////////////////////////////////////////////////
 
  virtual const String_type &engine() const = 0;
  virtual void set_engine(const String_type &engine) = 0;
 
  /////////////////////////////////////////////////////////////////////////
  // Index type.
  /////////////////////////////////////////////////////////////////////////
 
  virtual enum_index_type type() const = 0;
  virtual void set_type(enum_index_type type) = 0;
 
  /////////////////////////////////////////////////////////////////////////
  // Index algorithm.
  /////////////////////////////////////////////////////////////////////////
 
  virtual enum_index_algorithm algorithm() const = 0;
  virtual void set_algorithm(enum_index_algorithm algorithm) = 0;
 
  virtual bool is_algorithm_explicit() const = 0;
  virtual void set_algorithm_explicit(bool alg_expl) = 0;
 
  virtual bool is_visible() const = 0;
  virtual void set_visible(bool is_visible) = 0;
 
  /////////////////////////////////////////////////////////////////////////
  // SE-specific json attributes
  /////////////////////////////////////////////////////////////////////////
 
  virtual LEX_CSTRING engine_attribute() const = 0;
  virtual void set_engine_attribute(LEX_CSTRING) = 0;
 
  virtual LEX_CSTRING secondary_engine_attribute() const = 0;
  virtual void set_secondary_engine_attribute(LEX_CSTRING) = 0;
 
  /////////////////////////////////////////////////////////////////////////
  // Index-element collection.
  /////////////////////////////////////////////////////////////////////////
 
  virtual Index_element *add_element(Column *c) = 0;
 
  virtual const Index_elements &elements() const = 0;
 
  virtual void set_ordinal_position(uint ordinal_position) = 0;
 
  virtual uint ordinal_position() const = 0;
 
  /**
    Converts *this into json.
 
    Converts all member variables that are to be included in the sdi
    into json by transforming them appropriately and passing them to
    the rapidjson writer provided.
 
    @param wctx opaque context for data needed by serialization
    @param w rapidjson writer which will perform conversion to json
 
  */
 
  virtual void serialize(Sdi_wcontext *wctx, Sdi_writer *w) const = 0;
 
  /**
    Re-establishes the state of *this by reading sdi information from
    the rapidjson DOM subobject provided.
 
    Cross-references encountered within this object are tracked in
    sdictx, so that they can be updated when the entire object graph
    has been established.
 
    @param rctx stores book-keeping information for the
    deserialization process
    @param val subobject of rapidjson DOM containing json
    representation of this object
  */
 
  virtual bool deserialize(Sdi_rcontext *rctx, const RJ_Value &val) = 0;
 
  /**
    Check if index represents candidate key.
  */
  virtual bool is_candidate_key() const = 0;
};
 
///////////////////////////////////////////////////////////////////////////
 
}  // namespace dd
 
#endif  // DD__INDEX_INCLUDED