143 lines
4.9 KiB
C++
143 lines
4.9 KiB
C++
/*
|
|
Portions Copyright (c) 2020, Alibaba Group Holding Limited
|
|
Copyright (c) 2014, SkySQL Ab
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; version 2 of the License.
|
|
|
|
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 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
|
|
|
|
#pragma once
|
|
|
|
/* C++ system header files */
|
|
#include <map>
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
/* MySQL header files */
|
|
//#include "sql_class.h"
|
|
|
|
/* XENGINE header files */
|
|
#include "xengine/db.h"
|
|
#include "db/column_family.h"
|
|
|
|
/* MyX header files */
|
|
#include "./xdb_cf_options.h"
|
|
#include "./log_ddl.h"
|
|
|
|
namespace xengine {
|
|
|
|
namespace db {
|
|
class DB;
|
|
class ColumnFamilyHandle;
|
|
}
|
|
|
|
} //namspace xengine
|
|
|
|
namespace myx {
|
|
|
|
/*
|
|
We need a Column Family (CF) manager. Its functions:
|
|
- create column families (synchronized, don't create the same twice)
|
|
- keep count in each column family.
|
|
= the count is kept on-disk.
|
|
= there are no empty CFs. initially count=1.
|
|
= then, when doing DDL, we increase or decrease it.
|
|
(atomicity is maintained by being in the same WriteBatch with DDLs)
|
|
= if DROP discovers that now count=0, it removes the CF.
|
|
|
|
Current state is:
|
|
- CFs are created in a synchronized way. We can't remove them, yet.
|
|
*/
|
|
|
|
class Xdb_cf_manager {
|
|
//std::map<std::string, xengine::db::ColumnFamilyHandle *> m_cf_name_map;
|
|
std::map<uint32_t, xengine::db::ColumnFamilyHandle *> m_subtable_id_map;
|
|
|
|
mutable mysql_mutex_t m_mutex;
|
|
|
|
static void get_per_index_cf_name(const std::string &db_table_name,
|
|
const char *const index_name,
|
|
std::string *const res);
|
|
|
|
Xdb_cf_options *m_cf_options = nullptr;
|
|
|
|
Xdb_ddl_log_manager *m_ddl_log_manager = nullptr;
|
|
|
|
public:
|
|
Xdb_cf_manager(const Xdb_cf_manager &) = delete;
|
|
Xdb_cf_manager &operator=(const Xdb_cf_manager &) = delete;
|
|
Xdb_cf_manager() = default;
|
|
|
|
static bool is_cf_name_reverse(const char *const name);
|
|
|
|
/*
|
|
This is called right after the DB::Open() call. The parameters describe
|
|
column
|
|
families that are present in the database. The first CF is the default CF.
|
|
*/
|
|
void init(Xdb_cf_options *cf_options,
|
|
std::vector<xengine::db::ColumnFamilyHandle *> *const handles,
|
|
Xdb_ddl_log_manager *ddl_log_manager);
|
|
void cleanup();
|
|
|
|
/*
|
|
Used by CREATE TABLE.
|
|
- cf_name=nullptr means use default column family
|
|
- cf_name=_auto_ means use 'dbname.tablename.indexname'
|
|
*/
|
|
xengine::db::ColumnFamilyHandle *
|
|
get_or_create_cf(xengine::db::DB *const xdb,
|
|
xengine::db::WriteBatch *write_batch, ulong thread_id,
|
|
uint subtable_id, const char *cf_name,
|
|
const std::string &db_table_name,
|
|
const char *const index_name, bool *const is_automatic,
|
|
const xengine::common::ColumnFamilyOptions &cf_options,
|
|
bool create_table_space, int64_t &table_space_id);
|
|
|
|
/** create subtable physically */
|
|
bool create_subtable(db::DB *const xdb, xengine::db::WriteBatch *xa_batch,
|
|
ulong thread_id, uint index_number,
|
|
const xengine::common::ColumnFamilyOptions &cf_options,
|
|
const char *subtable_name,
|
|
bool create_table_space,
|
|
int64_t &table_space_id,
|
|
db::ColumnFamilyHandle **cf_handle);
|
|
/* Used by table open */
|
|
xengine::db::ColumnFamilyHandle *get_cf(const char *cf_name,
|
|
const std::string &db_table_name,
|
|
const char *const index_name,
|
|
bool *const is_automatic) const;
|
|
|
|
/* Look up cf by id; used by datadic */
|
|
xengine::db::ColumnFamilyHandle *get_cf(const uint32_t &id) const;
|
|
|
|
/* Used to iterate over column families for show status */
|
|
//std::vector<std::string> get_cf_names(void) const;
|
|
|
|
/* Used to iterate over column families for show status */
|
|
std::vector<int32_t> get_subtable_ids(void) const;
|
|
|
|
/* Used to iterate over column families */
|
|
std::vector<xengine::db::ColumnFamilyHandle *> get_all_cf(void) const;
|
|
|
|
/* drop column family if necessary */
|
|
void drop_cf(xengine::db::DB *const xdb, const uint32_t cf_id);
|
|
|
|
void get_cf_options(const std::string &cf_name,
|
|
xengine::common::ColumnFamilyOptions *const opts)
|
|
MY_ATTRIBUTE((__nonnull__)) {
|
|
m_cf_options->get_cf_options(cf_name, opts);
|
|
}
|
|
};
|
|
|
|
} // namespace myx
|