check_constraint_impl.h

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/* Copyright (c) 2019, 2025, 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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   documentation.  The authors of MySQL hereby grant you an additional
   permission to link the program and your derivative works with the
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   the program or referenced in the documentation.
 
   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__CHECK_CONSTRAINT_IMPL_INCLUDED
#define DD__CHECK_CONSTRAINT_IMPL_INCLUDED
 
#include <new>
 
#include "mysql/strings/m_ctype.h"                 // my_strcasecmp
#include "sql/dd/impl/types/entity_object_impl.h"  // dd::Entity_object_impl
#include "sql/dd/sdi_fwd.h"
#include "sql/dd/string_type.h"
#include "sql/dd/types/check_constraint.h"  // dd::Check_constraint
#include "sql/mysqld_cs.h"
 
namespace dd {
 
///////////////////////////////////////////////////////////////////////////
 
class Object_table;
class Open_dictionary_tables_ctx;
class Raw_record;
class Sdi_rcontext;
class Sdi_wcontext;
class Table;
class Table_impl;
 
///////////////////////////////////////////////////////////////////////////
 
class Check_constraint_impl : public Entity_object_impl,
                              public Check_constraint {
 public:
  Check_constraint_impl();
 
  Check_constraint_impl(Table_impl *table);
 
  Check_constraint_impl(const Check_constraint_impl &src, Table_impl *parent);
 
 public:
  static void register_tables(Open_dictionary_tables_ctx *otx);
 
  const Object_table &object_table() const override;
 
  bool validate() const override;
 
  bool store(Open_dictionary_tables_ctx *otx) override;
 
  bool store_attributes(Raw_record *r) override;
 
  bool restore_attributes(const Raw_record &r) override;
 
  void serialize(Sdi_wcontext *wctx, Sdi_writer *w) const override;
 
  bool deserialize(Sdi_rcontext *rctx, const RJ_Value &val) override;
 
  void debug_print(String_type &outb) const override;
 
  void set_ordinal_position(uint) {}
 
  virtual uint ordinal_position() const { return -1; }
 
 public:
  /////////////////////////////////////////////////////////////////////////
  // State.
  /////////////////////////////////////////////////////////////////////////
 
  enum_constraint_state constraint_state() const override {
    return m_constraint_state;
  }
 
  void set_constraint_state(bool is_enabled) override {
    m_constraint_state = is_enabled ? CS_ENFORCED : CS_NOT_ENFORCED;
  }
 
  /////////////////////////////////////////////////////////////////////////
  // Check clause/utf8.
  /////////////////////////////////////////////////////////////////////////
 
  const String_type &check_clause() const override { return m_check_clause; }
 
  void set_check_clause(const String_type &check_clause) override {
    m_check_clause = check_clause;
  }
 
  const String_type &check_clause_utf8() const override {
    return m_check_clause_utf8;
  }
 
  void set_check_clause_utf8(const String_type &check_clause_utf8) override {
    m_check_clause_utf8 = check_clause_utf8;
  }
 
  /////////////////////////////////////////////////////////////////////////
  // Alter mode ( true / false).
  // Set during ALTER TABLE operation. In alter mode, alias_name is stored
  // in data-dictionary to avoid name conflicts.
  /////////////////////////////////////////////////////////////////////////
 
  bool is_alter_mode() const override { return m_alter_mode; }
 
  void set_alter_mode(bool alter_mode) override { m_alter_mode = alter_mode; }
 
  /////////////////////////////////////////////////////////////////////////
  // Alias check constriaint name.
  /////////////////////////////////////////////////////////////////////////
 
  const String_type &alias_name() const override { return m_alias_name; }
 
  void set_alias_name(const String_type &alias_name) override {
    m_alias_name = alias_name;
  }
 
  /////////////////////////////////////////////////////////////////////////
  // Table.
  /////////////////////////////////////////////////////////////////////////
 
  const Table &table() const override;
 
  Table &table() override;
 
 public:
  static Check_constraint_impl *restore_item(Table_impl *table) {
    return new (std::nothrow) Check_constraint_impl(table);
  }
 
  static Check_constraint_impl *clone(const Check_constraint_impl &other,
                                      Table_impl *table) {
    return new (std::nothrow) Check_constraint_impl(other, table);
  }
 
  // Fix "inherits ... via dominance" warnings
  Entity_object_impl *impl() override { return Entity_object_impl::impl(); }
  const Entity_object_impl *impl() const override {
    return Entity_object_impl::impl();
  }
  Object_id id() const override { return Entity_object_impl::id(); }
  bool is_persistent() const override {
    return Entity_object_impl::is_persistent();
  }
  const String_type &name() const override {
    return Entity_object_impl::name();
  }
  void set_name(const String_type &name) override {
    Entity_object_impl::set_name(name);
  }
 
 private:
  enum_constraint_state m_constraint_state{CS_ENFORCED};
  String_type m_check_clause;
  String_type m_check_clause_utf8;
  bool m_alter_mode{false};
  String_type m_alias_name;
  Object_id m_schema_id;
 
  // References to the Table object.
  Table_impl *m_table;
};
 
///////////////////////////////////////////////////////////////////////////
 
/** Class used to sort check constraints by name for the same table. */
struct Check_constraint_order_comparator {
  bool operator()(const dd::Check_constraint *cc1,
                  const dd::Check_constraint *cc2) const {
    return (my_strcasecmp(system_charset_info, cc1->name().c_str(),
                          cc2->name().c_str()) < 0);
  }
};
 
///////////////////////////////////////////////////////////////////////////
}  // namespace dd
 
#endif  // DD__CHECK_CONSTRAINT_IMPL_INCLUDED