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+/* Copyright (c) 2014, 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 Street, Suite 500, Boston, MA 02110-1335 USA */
+
+/**
+ @file storage/perfschema/table_prepared_stmt_instances.cc
+ Table PREPARED_STATEMENTS_INSTANCES (implementation).
+*/
+
+#include "my_global.h"
+#include "my_thread.h"
+#include "pfs_instr_class.h"
+#include "pfs_column_types.h"
+#include "pfs_column_values.h"
+#include "pfs_global.h"
+#include "pfs_instr.h"
+#include "pfs_timer.h"
+#include "pfs_visitor.h"
+#include "pfs_prepared_stmt.h"
+#include "table_prepared_stmt_instances.h"
+#include "pfs_buffer_container.h"
+#include "field.h"
+
+THR_LOCK table_prepared_stmt_instances::m_table_lock;
+
+PFS_engine_table_share_state
+table_prepared_stmt_instances::m_share_state = {
+ false /* m_checked */
+};
+
+PFS_engine_table_share
+table_prepared_stmt_instances::m_share=
+{
+ { C_STRING_WITH_LEN("prepared_statements_instances") },
+ &pfs_truncatable_acl,
+ table_prepared_stmt_instances::create,
+ NULL, /* write_row */
+ table_prepared_stmt_instances::delete_all_rows,
+ table_prepared_stmt_instances::get_row_count,
+ sizeof(PFS_simple_index),
+ &m_table_lock,
+ { C_STRING_WITH_LEN("CREATE TABLE prepared_statements_instances("
+ "OBJECT_INSTANCE_BEGIN bigint(20) unsigned NOT NULL comment 'The address in memory of the instrumented prepared statement.',"
+ "STATEMENT_ID bigint(20) unsigned NOT NULL comment 'The internal statement ID assigned by the server.',"
+ "STATEMENT_NAME varchar(64) default NULL comment 'For the binary protocol, this column is NULL. For the text protocol, this column is the external statement name assigned by the user.',"
+ "SQL_TEXT longtext NOT NULL comment 'The prepared statement text, with ? placeholder markers.',"
+ "OWNER_THREAD_ID bigint(20) unsigned NOT NULL comment 'Event thread id that created the prepared statement.',"
+ "OWNER_EVENT_ID bigint(20) unsigned NOT NULL comment 'Event id that created the prepared statement.',"
+ "OWNER_OBJECT_TYPE enum('EVENT','FUNCTION','PROCEDURE','TABLE','TRIGGER') DEFAULT NULL comment 'NULL for a prepared statement created by a client session. Type of the stored program that created the prepared statement.',"
+ "OWNER_OBJECT_SCHEMA varchar(64) DEFAULT NULL comment 'NULL for a prepared statement created by a client session. Schema of the stored program that created the prepared statement.',"
+ "OWNER_OBJECT_NAME varchar(64) DEFAULT NULL comment 'NULL for a prepared statement created by a client session. Name of the stored program that created the prepared statement.',"
+ "TIMER_PREPARE bigint(20) unsigned NOT NULL comment 'The time spent executing the statement preparation itself.',"
+ "COUNT_REPREPARE bigint(20) unsigned NOT NULL comment 'The number of times the statement was reprepared internally.',"
+ "COUNT_EXECUTE bigint(20) unsigned NOT NULL comment 'Total times the prepared statement was executed.',"
+ "SUM_TIMER_EXECUTE bigint(20) unsigned NOT NULL comment 'Total time spent executing all prepared statements.',"
+ "MIN_TIMER_EXECUTE bigint(20) unsigned NOT NULL comment 'Minimum time spent executing any of the prepared statements.',"
+ "AVG_TIMER_EXECUTE bigint(20) unsigned NOT NULL comment 'Average time spent executing any of the prepared statements.',"
+ "MAX_TIMER_EXECUTE bigint(20) unsigned NOT NULL comment 'Maximum time spent executing any of the prepared statements.',"
+ "SUM_LOCK_TIME bigint(20) unsigned NOT NULL comment 'The total time spent (in picoseconds) waiting for table locks for the prepared statements.',"
+ "SUM_ERRORS bigint(20) unsigned NOT NULL comment 'The total number of errors that occurend for the prepared statements.',"
+ "SUM_WARNINGS bigint(20) unsigned NOT NULL comment 'The total number of warnings that occurend for the prepared statements.',"
+ "SUM_ROWS_AFFECTED bigint(20) unsigned NOT NULL comment 'The total number of affected rows by the prepared statements.',"
+ "SUM_ROWS_SENT bigint(20) unsigned NOT NULL comment 'The total number of rows returned by the prepared statements.',"
+ "SUM_ROWS_EXAMINED bigint(20) unsigned NOT NULL comment 'The total number of rows examined by the prepared statements.',"
+ "SUM_CREATED_TMP_DISK_TABLES bigint(20) unsigned NOT NULL comment 'The total number of on-disk temporary tables created by the prepared statements.',"
+ "SUM_CREATED_TMP_TABLES bigint(20) unsigned NOT NULL comment 'The total number of in-memory temporary tables created by the prepared statements.',"
+ "SUM_SELECT_FULL_JOIN bigint(20) unsigned NOT NULL comment 'The total number of full joins executed by the prepared statements.',"
+ "SUM_SELECT_FULL_RANGE_JOIN bigint(20) unsigned NOT NULL comment 'The total number of range search joins executed by the prepared statements.',"
+ "SUM_SELECT_RANGE bigint(20) unsigned NOT NULL comment 'The total number of joins that used ranges on the first table executed by the prepared statements.',"
+ "SUM_SELECT_RANGE_CHECK bigint(20) unsigned NOT NULL comment 'The total number of joins that check for key usage after each row executed by the prepared statements.',"
+ "SUM_SELECT_SCAN bigint(20) unsigned NOT NULL comment 'The total number of joins that did a full scan of the first table executed by the prepared statements.',"
+ "SUM_SORT_MERGE_PASSES bigint(20) unsigned NOT NULL comment 'The total number of merge passes that the sort algorithm has had to do for the prepared statements.',"
+ "SUM_SORT_RANGE bigint(20) unsigned NOT NULL comment 'The total number of sorts that were done using ranges for the prepared statements.',"
+ "SUM_SORT_ROWS bigint(20) unsigned NOT NULL comment 'The total number of sorted rows that were sorted by the prepared statements.',"
+ "SUM_SORT_SCAN bigint(20) unsigned NOT NULL comment 'The total number of sorts that were done by scanning the table by the prepared statements.',"
+ "SUM_NO_INDEX_USED bigint(20) unsigned NOT NULL comment 'The total number of statements that performed a table scan without using an index.',"
+ "SUM_NO_GOOD_INDEX_USED bigint(20) unsigned NOT NULL comment 'The total number of statements where no good index was found.')")},
+ false, /* m_perpetual */
+ false, /* m_optional */
+ &m_share_state
+};
+
+PFS_engine_table*
+table_prepared_stmt_instances::create(void)
+{
+ return new table_prepared_stmt_instances();
+}
+
+int
+table_prepared_stmt_instances::delete_all_rows(void)
+{
+ reset_prepared_stmt_instances();
+ return 0;
+}
+
+ha_rows
+table_prepared_stmt_instances::get_row_count(void)
+{
+ return global_prepared_stmt_container.get_row_count();
+}
+
+table_prepared_stmt_instances::table_prepared_stmt_instances()
+ : PFS_engine_table(&m_share, &m_pos),
+ m_row_exists(false), m_pos(0), m_next_pos(0)
+{}
+
+void table_prepared_stmt_instances::reset_position(void)
+{
+ m_pos= 0;
+ m_next_pos= 0;
+}
+
+int table_prepared_stmt_instances::rnd_next(void)
+{
+ PFS_prepared_stmt* pfs;
+
+ m_pos.set_at(&m_next_pos);
+ PFS_prepared_stmt_iterator it= global_prepared_stmt_container.iterate(m_pos.m_index);
+ pfs= it.scan_next(& m_pos.m_index);
+ if (pfs != NULL)
+ {
+ make_row(pfs);
+ m_next_pos.set_after(&m_pos);
+ return 0;
+ }
+
+ return HA_ERR_END_OF_FILE;
+}
+
+int
+table_prepared_stmt_instances::rnd_pos(const void *pos)
+{
+ PFS_prepared_stmt* pfs;
+
+ set_position(pos);
+
+ pfs= global_prepared_stmt_container.get(m_pos.m_index);
+ if (pfs != NULL)
+ {
+ make_row(pfs);
+ return 0;
+ }
+
+ return HA_ERR_RECORD_DELETED;
+}
+
+
+void table_prepared_stmt_instances::make_row(PFS_prepared_stmt* prepared_stmt)
+{
+ pfs_optimistic_state lock;
+ m_row_exists= false;
+
+ prepared_stmt->m_lock.begin_optimistic_lock(&lock);
+
+ m_row.m_identity= prepared_stmt->m_identity;
+
+ m_row.m_stmt_id= prepared_stmt->m_stmt_id;
+
+ m_row.m_owner_thread_id= prepared_stmt->m_owner_thread_id;
+ m_row.m_owner_event_id= prepared_stmt->m_owner_event_id;
+
+ m_row.m_stmt_name_length= prepared_stmt->m_stmt_name_length;
+ if(m_row.m_stmt_name_length > 0)
+ memcpy(m_row.m_stmt_name, prepared_stmt->m_stmt_name,
+ m_row.m_stmt_name_length);
+
+ m_row.m_sql_text_length= prepared_stmt->m_sqltext_length;
+ if(m_row.m_sql_text_length > 0)
+ memcpy(m_row.m_sql_text, prepared_stmt->m_sqltext,
+ m_row.m_sql_text_length);
+
+ m_row.m_owner_object_type= prepared_stmt->m_owner_object_type;
+
+ m_row.m_owner_object_name_length= prepared_stmt->m_owner_object_name_length;
+ if(m_row.m_owner_object_name_length > 0)
+ memcpy(m_row.m_owner_object_name, prepared_stmt->m_owner_object_name,
+ m_row.m_owner_object_name_length);
+
+ m_row.m_owner_object_schema_length= prepared_stmt->m_owner_object_schema_length;
+ if(m_row.m_owner_object_schema_length > 0)
+ memcpy(m_row.m_owner_object_schema, prepared_stmt->m_owner_object_schema,
+ m_row.m_owner_object_schema_length);
+
+ time_normalizer *normalizer= time_normalizer::get(statement_timer);
+ /* Get prepared statement prepare stats. */
+ m_row.m_prepare_stat.set(normalizer, & prepared_stmt->m_prepare_stat);
+ /* Get prepared statement reprepare stats. */
+ m_row.m_reprepare_stat.set(normalizer, & prepared_stmt->m_reprepare_stat);
+ /* Get prepared statement execute stats. */
+ m_row.m_execute_stat.set(normalizer, & prepared_stmt->m_execute_stat);
+
+ if (! prepared_stmt->m_lock.end_optimistic_lock(&lock))
+ return;
+
+ m_row_exists= true;
+}
+
+int table_prepared_stmt_instances
+::read_row_values(TABLE *table, unsigned char *buf, Field **fields,
+ bool read_all)
+{
+ Field *f;
+
+ if (unlikely(! m_row_exists))
+ return HA_ERR_RECORD_DELETED;
+
+ /*
+ Set the null bits.
+ */
+ assert(table->s->null_bytes == 1);
+ buf[0]= 0;
+
+ for (; (f= *fields) ; fields++)
+ {
+ if (read_all || bitmap_is_set(table->read_set, f->field_index))
+ {
+ switch(f->field_index)
+ {
+ case 0: /* OBJECT_INSTANCE_BEGIN */
+ set_field_ulonglong(f, (intptr)m_row.m_identity);
+ break;
+ case 1: /* STATEMENT_ID */
+ set_field_ulonglong(f, m_row.m_stmt_id);
+ break;
+ case 2: /* STATEMENT_NAME */
+ if(m_row.m_stmt_name_length > 0)
+ set_field_varchar_utf8(f, m_row.m_stmt_name,
+ m_row.m_stmt_name_length);
+ else
+ f->set_null();
+ break;
+ case 3: /* SQL_TEXT */
+ if(m_row.m_sql_text_length > 0)
+ set_field_longtext_utf8(f, m_row.m_sql_text,
+ m_row.m_sql_text_length);
+ else
+ f->set_null();
+ break;
+ case 4: /* OWNER_THREAD_ID */
+ set_field_ulonglong(f, m_row.m_owner_thread_id);
+ break;
+ case 5: /* OWNER_EVENT_ID */
+ if(m_row.m_owner_event_id > 0)
+ set_field_ulonglong(f, m_row.m_owner_event_id);
+ else
+ f->set_null();
+ break;
+ case 6: /* OWNER_OBJECT_TYPE */
+ if(m_row.m_owner_object_type != 0)
+ set_field_enum(f, m_row.m_owner_object_type);
+ else
+ f->set_null();
+ break;
+ case 7: /* OWNER_OBJECT_SCHEMA */
+ if(m_row.m_owner_object_schema_length > 0)
+ set_field_varchar_utf8(f, m_row.m_owner_object_schema,
+ m_row.m_owner_object_schema_length);
+ else
+ f->set_null();
+ break;
+ case 8: /* OWNER_OBJECT_NAME */
+ if(m_row.m_owner_object_name_length > 0)
+ set_field_varchar_utf8(f, m_row.m_owner_object_name,
+ m_row.m_owner_object_name_length);
+ else
+ f->set_null();
+ break;
+ case 9: /* TIMER_PREPARE */
+ m_row.m_prepare_stat.set_field(1, f);
+ break;
+ case 10: /* COUNT_REPREPARE */
+ m_row.m_reprepare_stat.set_field(0, f);
+ break;
+ default: /* 14, ... COUNT/SUM/MIN/AVG/MAX */
+ m_row.m_execute_stat.set_field(f->field_index - 11, f);
+ break;
+ }
+ }
+ }
+
+ return 0;
+}
+