sql_cmd_ddl_table.h

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   it under the terms of the GNU General Public License, version 2.0,
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#ifndef SQL_CMD_CREATE_TABLE_INCLUDED
#define SQL_CMD_CREATE_TABLE_INCLUDED
 
#include "lex_string.h"
#include "my_sqlcommand.h"
#include "sql/sql_cmd_ddl.h"
 
class Alter_info;
class THD;
class Table_ref;
 
/**
  A base class for CREATE/ALTER TABLE commands and friends.
 
  Child classes deal with SQL statements:
  * ALTER TABLE
  * ANALYZE TABLE
  * CACHE INDEX
  * CHECK TABLE
  * CREATE INDEX
  * CREATE TABLE
  * DROP INDEX
  * LOAD INDEX
  * OPTIMIZE TABLE
  * REPAIR TABLE
*/
class Sql_cmd_ddl_table : public Sql_cmd_ddl {
 public:
  explicit Sql_cmd_ddl_table(Alter_info *alter_info);
 
  ~Sql_cmd_ddl_table() override = 0;  // force abstract class
 
 protected:
  Alter_info *const m_alter_info;
};
 
inline Sql_cmd_ddl_table::~Sql_cmd_ddl_table() = default;
 
class Sql_cmd_create_table final : public Sql_cmd_ddl_table {
 public:
  Sql_cmd_create_table(Alter_info *alter_info,
                       Table_ref *query_expression_tables)
      : Sql_cmd_ddl_table(alter_info),
        query_expression_tables(query_expression_tables) {}
 
  enum_sql_command sql_command_code() const override {
    return SQLCOM_CREATE_TABLE;
  }
 
  const MYSQL_LEX_CSTRING *eligible_secondary_storage_engine(
      THD *thd) const override;
 
  bool execute(THD *thd) override;
  bool prepare(THD *thd) override;
  bool reprepare_on_execute_required() const override;
 
 private:
  Table_ref *query_expression_tables;
};
 
class Sql_cmd_create_or_drop_index_base : public Sql_cmd_ddl_table {
 public:
  using Sql_cmd_ddl_table::Sql_cmd_ddl_table;
 
  ~Sql_cmd_create_or_drop_index_base() override = 0;  // force abstract class
 
  bool execute(THD *thd) override;
};
 
inline Sql_cmd_create_or_drop_index_base::~Sql_cmd_create_or_drop_index_base() =
    default;
 
class Sql_cmd_create_index final : public Sql_cmd_create_or_drop_index_base {
 public:
  using Sql_cmd_create_or_drop_index_base::Sql_cmd_create_or_drop_index_base;
 
  enum_sql_command sql_command_code() const override {
    return SQLCOM_CREATE_INDEX;
  }
  bool reprepare_on_execute_required() const override;
};
 
class Sql_cmd_drop_table final : public Sql_cmd_ddl {
 public:
  enum_sql_command sql_command_code() const override {
    return SQLCOM_DROP_TABLE;
  }
 
  bool execute(THD *thd [[maybe_unused]]) override { return false; }
};
 
class Sql_cmd_drop_index final : public Sql_cmd_create_or_drop_index_base {
 public:
  using Sql_cmd_create_or_drop_index_base::Sql_cmd_create_or_drop_index_base;
 
  enum_sql_command sql_command_code() const override {
    return SQLCOM_DROP_INDEX;
  }
};
 
class Sql_cmd_cache_index final : public Sql_cmd_ddl_table {
 public:
  Sql_cmd_cache_index(Alter_info *alter_info, const LEX_CSTRING &key_cache_name)
      : Sql_cmd_ddl_table(alter_info), m_key_cache_name(key_cache_name) {}
 
  enum_sql_command sql_command_code() const override {
    return SQLCOM_ASSIGN_TO_KEYCACHE;
  }
 
  bool execute(THD *thd) override;
 
 private:
  bool assign_to_keycache(THD *thd, Table_ref *tables);
 
 private:
  const LEX_CSTRING m_key_cache_name;
};
 
class Sql_cmd_load_index final : public Sql_cmd_ddl_table {
 public:
  using Sql_cmd_ddl_table::Sql_cmd_ddl_table;
 
  enum_sql_command sql_command_code() const override {
    return SQLCOM_PRELOAD_KEYS;
  }
 
  bool execute(THD *thd) override;
 
 private:
  bool preload_keys(THD *thd, Table_ref *tables);
};
 
#endif /* SQL_CMD_CREATE_TABLE_INCLUDED */