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+/* Copyright (c) 2015, 2022, Oracle and/or its affiliates.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License, version 2.0,
+ as published by the Free Software Foundation.
+
+ This program is also distributed with certain software (including
+ but not limited to OpenSSL) that is licensed under separate terms,
+ as designated in a particular file or component or in included license
+ documentation. The authors of MySQL hereby grant you an additional
+ permission to link the program and your derivative works with the
+ separately licensed software that they have included with MySQL.
+
+ 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, version 2.0, 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
+
+#ifndef TABLE_SESSION_STATUS_H
+#define TABLE_SESSION_STATUS_H
+
+/**
+ @file storage/perfschema/table_session_status.h
+ Table SESSION_STATUS (declarations).
+*/
+
+#include "pfs_column_types.h"
+#include "pfs_engine_table.h"
+#include "pfs_instr_class.h"
+#include "pfs_instr.h"
+#include "table_helper.h"
+#include "pfs_variable.h"
+/**
+ @addtogroup Performance_schema_tables
+ @{
+*/
+
+/**
+ A row of table
+ PERFORMANCE_SCHEMA.SESSION_STATUS.
+*/
+struct row_session_status
+{
+ /** Column THREAD_ID. */
+ ulonglong m_thread_internal_id;
+ /** Column VARIABLE_NAME. */
+ PFS_variable_name_row m_variable_name;
+ /** Column VARIABLE_VALUE. */
+ PFS_variable_value_row m_variable_value;
+};
+
+/**
+ Store and retrieve table state information for queries that reinstantiate
+ the table object.
+*/
+class table_session_status_context : public PFS_table_context
+{
+public:
+ table_session_status_context(ulonglong current_version, bool restore) :
+ PFS_table_context(current_version, restore, THR_PFS_SS) { }
+};
+
+/** Table PERFORMANCE_SCHEMA.SESSION_STATUS. */
+class table_session_status : public PFS_engine_table
+{
+ typedef PFS_simple_index pos_t;
+
+public:
+ static PFS_engine_table_share_state m_share_state;
+ /** Table share */
+ static PFS_engine_table_share m_share;
+ static PFS_engine_table* create();
+ static ha_rows get_row_count();
+
+ virtual int rnd_init(bool scan);
+ virtual int rnd_next();
+ virtual int rnd_pos(const void *pos);
+ virtual void reset_position(void);
+
+protected:
+ virtual int read_row_values(TABLE *table,
+ unsigned char *buf,
+ Field **fields,
+ bool read_all);
+ table_session_status();
+
+public:
+ ~table_session_status()
+ {}
+
+protected:
+ void make_row(const Status_variable *status_var);
+
+private:
+ /** Table share lock. */
+ static THR_LOCK m_table_lock;
+ /** Fields definition. */
+ static TABLE_FIELD_DEF m_field_def;
+
+ /** Current THD variables. */
+ PFS_status_variable_cache m_status_cache;
+ /** Current row. */
+ row_session_status m_row;
+ /** True if the current row exists. */
+ bool m_row_exists;
+ /** Current position. */
+ pos_t m_pos;
+ /** Next position. */
+ pos_t m_next_pos;
+
+ /** Table context with global status array version. */
+ table_session_status_context *m_context;
+};
+
+/** @} */
+#endif