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src/share/stat/ob_opt_stat_sql_service.h Normal file
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/**
* Copyright (c) 2021 OceanBase
* OceanBase CE is licensed under Mulan PubL v2.
* You can use this software according to the terms and conditions of the Mulan PubL v2.
* You may obtain a copy of Mulan PubL v2 at:
* http://license.coscl.org.cn/MulanPubL-2.0
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
* See the Mulan PubL v2 for more details.
*/
#ifndef _OB_OPT_STAT_SQL_SERVICE_H_
#define _OB_OPT_STAT_SQL_SERVICE_H_
#include "share/stat/ob_opt_column_stat.h"
#include "share/stat/ob_opt_table_stat.h"
namespace oceanbase {
namespace common {
namespace sqlclient {
class ObMySQLResult;
}
struct ObPartitionKey;
class ObServerConfig;
class ObMySQLProxy;
/**
* SQL Service for fetching/updating table level statistics and column level statistics
*/
class ObOptStatSqlService {
public:
ObOptStatSqlService();
~ObOptStatSqlService();
bool is_inited() const
{
return inited_;
}
int init(ObMySQLProxy* proxy, ObServerConfig* config);
int fetch_table_stat(const ObOptTableStat::Key& key, ObOptTableStat& stat);
int fill_table_stat(sqlclient::ObMySQLResult& result, ObOptTableStat& stat);
// TODO: temporarily used
int fetch_table_stat(uint64_t table_id, ObOptTableStat& stat);
int fill_column_stat(const uint64_t table_id, sqlclient::ObMySQLResult& result, ObOptColumnStat& stat,
ObHistogram& basic_histogram_info);
int fetch_column_stat(const ObOptColumnStat::Key& key, ObOptColumnStat& stat);
int update_column_stat(const common::ObIArray<ObOptColumnStat*>& column_stats);
int delete_column_stat(const ObIArray<ObOptColumnStat*>& column_stats);
private:
int get_table_stat_sql(const ObOptColumnStat& stat, const int64_t current_time, ObSqlString& sql_string);
int get_column_stat_sql(const ObOptColumnStat& stat, const int64_t current_time, ObSqlString& sql_string);
int get_histogram_stat_sql(const ObOptColumnStat& stat, common::ObIAllocator& allocator,
ObOptColumnStat::Bucket& bucket, ObSqlString& sql_string);
int get_obj_str(const common::ObObj& obj, common::ObIAllocator& allocator, common::ObString& out_str);
int get_obj_binary_hex_str(const common::ObObj& obj, common::ObIAllocator& allocator, common::ObString& out_str);
int hex_str_to_obj(const char* buf, int64_t buf_len, common::ObIAllocator& allocator, common::ObObj& obj);
private:
int fetch_histogram_stat(
const ObOptColumnStat::Key& key, const ObHistogram& basic_histogram_info, ObOptColumnStat& stat);
int fill_bucket_stat(sqlclient::ObMySQLResult& result, ObOptColumnStat& stat, int64_t& last_endpoint_num);
bool inited_;
ObMySQLProxy* mysql_proxy_;
lib::ObMutex mutex_;
ObServerConfig* config_;
};
} // namespace common
} // namespace oceanbase
#endif /* _OB_OPT_STAT_SQL_SERVICE_H_ */