1 /* Copyright (c) 2012, 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 Foundation, 21 51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */ 22 23 #ifndef CURSOR_BY_THREAD_CONNECT_ATTR_H 24 #define CURSOR_BY_THREAD_CONNECT_ATTR_H 25 26 #include "pfs_column_types.h" 27 #include "pfs_engine_table.h" 28 #include "pfs_instr.h" 29 30 /** 31 \addtogroup Performance_schema_tables 32 @{ 33 */ 34 35 /** 36 Position of a cursor on abstract table 37 PERFORMANCE_SCHEMA.SESSION_CONNECT_ATTRS. 38 */ 39 struct pos_connect_attr_by_thread_by_attr 40 : public PFS_double_index 41 { pos_connect_attr_by_thread_by_attrpos_connect_attr_by_thread_by_attr42 pos_connect_attr_by_thread_by_attr() 43 : PFS_double_index(0, 0) 44 {} 45 next_threadpos_connect_attr_by_thread_by_attr46 inline void next_thread(void) 47 { 48 m_index_1++; 49 m_index_2= 0; 50 } 51 resetpos_connect_attr_by_thread_by_attr52 inline void reset(void) 53 { 54 m_index_1= 0; 55 m_index_2= 0; 56 } 57 }; 58 59 /** Cursor CURSOR_BY_THREAD_CONNECT_ATTR. */ 60 class cursor_by_thread_connect_attr : public PFS_engine_table 61 { 62 public: 63 static ha_rows get_row_count(); 64 65 virtual int rnd_next(); 66 virtual int rnd_pos(const void *pos); 67 virtual void reset_position(void); 68 69 protected: 70 cursor_by_thread_connect_attr(const PFS_engine_table_share *share); 71 72 public: ~cursor_by_thread_connect_attr()73 ~cursor_by_thread_connect_attr() 74 {} 75 76 protected: 77 virtual void make_row(PFS_thread *thread, uint ordinal)= 0; 78 /** True if row exists */ 79 bool m_row_exists; 80 81 private: 82 /** Current position. */ 83 pos_connect_attr_by_thread_by_attr m_pos; 84 /** Next position. */ 85 pos_connect_attr_by_thread_by_attr m_next_pos; 86 }; 87 88 /** @} */ 89 #endif 90