1 /* Copyright (c) 2011, 2021, Oracle and/or its affiliates. 2 3 This program is free software; you can redistribute it and/or modify 4 it under the terms of the GNU General Public License, version 2.0, 5 as published by the Free Software Foundation. 6 7 This program is also distributed with certain software (including 8 but not limited to OpenSSL) that is licensed under separate terms, 9 as designated in a particular file or component or in included license 10 documentation. The authors of MySQL hereby grant you an additional 11 permission to link the program and your derivative works with the 12 separately licensed software that they have included with MySQL. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License, version 2.0, for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program; if not, write to the Free Software 21 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA */ 22 23 #ifndef CURSOR_BY_HOST_H 24 #define CURSOR_BY_HOST_H 25 26 /** 27 @file storage/perfschema/cursor_by_host.h 28 Cursor CURSOR_BY_HOST (declarations). 29 */ 30 31 #include "pfs_engine_table.h" 32 #include "pfs_host.h" 33 #include "table_helper.h" 34 35 /** 36 @addtogroup Performance_schema_tables 37 @{ 38 */ 39 40 /** Cursor CURSOR_BY_HOST. */ 41 class cursor_by_host : public PFS_engine_table 42 { 43 public: 44 static ha_rows get_row_count(); 45 46 virtual int rnd_next(); 47 virtual int rnd_pos(const void *pos); 48 virtual void reset_position(void); 49 50 protected: 51 cursor_by_host(const PFS_engine_table_share *share); 52 53 public: ~cursor_by_host()54 ~cursor_by_host() 55 {} 56 57 protected: 58 virtual void make_row(PFS_host *host)= 0; 59 60 private: 61 /** Current position. */ 62 PFS_simple_index m_pos; 63 /** Next position. */ 64 PFS_simple_index m_next_pos; 65 }; 66 67 /** @} */ 68 #endif 69