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Diffstat (limited to 'storage/perfschema/table_table_handles.cc')
| -rw-r--r-- | storage/perfschema/table_table_handles.cc | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/storage/perfschema/table_table_handles.cc b/storage/perfschema/table_table_handles.cc new file mode 100644 index 00000000..d878ce2f --- /dev/null +++ b/storage/perfschema/table_table_handles.cc @@ -0,0 +1,221 @@ +/* Copyright (c) 2012, 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_table_handles.cc + Table TABLE_TABLE_HANDLES (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 "table_table_handles.h" +#include "pfs_global.h" +#include "pfs_stat.h" +#include "pfs_buffer_container.h" +#include "field.h" + +THR_LOCK table_table_handles::m_table_lock; + +PFS_engine_table_share_state +table_table_handles::m_share_state = { + false /* m_checked */ +}; + +PFS_engine_table_share +table_table_handles::m_share= +{ + { C_STRING_WITH_LEN("table_handles") }, + &pfs_readonly_acl, + table_table_handles::create, + NULL, /* write_row */ + NULL, /* delete_all_rows */ + table_table_handles::get_row_count, + sizeof(PFS_simple_index), + &m_table_lock, + { C_STRING_WITH_LEN("CREATE TABLE table_handles(" + "OBJECT_TYPE VARCHAR(64) not null comment 'The table opened by a table handle.'," + "OBJECT_SCHEMA VARCHAR(64) not null comment 'The schema that contains the object.'," + "OBJECT_NAME VARCHAR(64) not null comment 'The name of the instrumented object.'," + "OBJECT_INSTANCE_BEGIN BIGINT unsigned not null comment 'The table handle address in memory.'," + "OWNER_THREAD_ID BIGINT unsigned comment 'The thread owning the table handle.'," + "OWNER_EVENT_ID BIGINT unsigned comment 'The event which caused the table handle to be opened.'," + "INTERNAL_LOCK VARCHAR(64) comment 'The table lock used at the SQL level.'," + "EXTERNAL_LOCK VARCHAR(64) comment 'The table lock used at the storage engine level.')") }, + false, /* m_perpetual */ + false, /* m_optional */ + &m_share_state +}; + +PFS_engine_table* +table_table_handles::create(void) +{ + return new table_table_handles(); +} + +ha_rows +table_table_handles::get_row_count(void) +{ + return global_table_container.get_row_count(); +} + +table_table_handles::table_table_handles() + : PFS_engine_table(&m_share, &m_pos), + m_row_exists(false), m_pos(0), m_next_pos(0) +{} + +void table_table_handles::reset_position(void) +{ + m_pos.m_index= 0; + m_next_pos.m_index= 0; +} + +int table_table_handles::rnd_init(bool scan) +{ + return 0; +} + +int table_table_handles::rnd_next(void) +{ + PFS_table *pfs; + + m_pos.set_at(&m_next_pos); + PFS_table_iterator it= global_table_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_table_handles::rnd_pos(const void *pos) +{ + PFS_table *pfs; + + set_position(pos); + + pfs= global_table_container.get(m_pos.m_index); + if (pfs != NULL) + { + make_row(pfs); + return 0; + } + + return HA_ERR_RECORD_DELETED; +} + +void table_table_handles::make_row(PFS_table *table) +{ + pfs_optimistic_state lock; + PFS_table_share *share; + PFS_thread *thread; + + m_row_exists= false; + + table->m_lock.begin_optimistic_lock(&lock); + + share= sanitize_table_share(table->m_share); + if (share == NULL) + return; + + if (m_row.m_object.make_row(share)) + return; + + m_row.m_identity= table->m_identity; + + thread= sanitize_thread(table->m_thread_owner); + if (thread != NULL) + { + m_row.m_owner_thread_id= thread->m_thread_internal_id; + m_row.m_owner_event_id= table->m_owner_event_id; + } + else + { + m_row.m_owner_thread_id= 0; + m_row.m_owner_event_id= 0; + } + + m_row.m_internal_lock= table->m_internal_lock; + m_row.m_external_lock= table->m_external_lock; + + if (! table->m_lock.end_optimistic_lock(&lock)) + return; + + m_row_exists= true; +} + +int table_table_handles::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_TYPE */ + case 1: /* SCHEMA_NAME */ + case 2: /* OBJECT_NAME */ + m_row.m_object.set_field(f->field_index, f); + break; + case 3: /* OBJECT_INSTANCE_BEGIN */ + set_field_ulonglong(f, (intptr) m_row.m_identity); + break; + case 4: /* OWNER_THREAD_ID */ + set_field_ulonglong(f, m_row.m_owner_thread_id); + break; + case 5: /* OWNER_EVENT_ID */ + set_field_ulonglong(f, m_row.m_owner_event_id); + break; + case 6: /* INTERNAL_LOCK */ + set_field_lock_type(f, m_row.m_internal_lock); + break; + case 7: /* EXTERNAL_LOCK */ + set_field_lock_type(f, m_row.m_external_lock); + break; + default: + assert(false); + } + } + } + + return 0; +} + |