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f1c1c04a34
Discover P_S tables automatically. Most of this patch is code clean-up: - removed tests and code responsible for P_S tables correctness verification - always return error from ha_perfschema::create() - install/upgrade scripts won't create P_S tables anymore
126 lines
3.2 KiB
C++
126 lines
3.2 KiB
C++
/* Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */
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#include "my_global.h"
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#include "my_pthread.h"
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#include "table_users.h"
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#include "pfs_instr_class.h"
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#include "pfs_instr.h"
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#include "pfs_account.h"
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#include "pfs_user.h"
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#include "pfs_visitor.h"
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THR_LOCK table_users::m_table_lock;
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PFS_engine_table_share
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table_users::m_share=
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{
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{ C_STRING_WITH_LEN("users") },
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&pfs_truncatable_acl,
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&table_users::create,
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NULL, /* write_row */
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table_users::delete_all_rows,
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NULL, /* get_row_count */
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1000, /* records */
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sizeof(PFS_simple_index), /* ref length */
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&m_table_lock,
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{ C_STRING_WITH_LEN("CREATE TABLE users("
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"USER CHAR(16) collate utf8_bin default null,"
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"CURRENT_CONNECTIONS bigint not null,"
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"TOTAL_CONNECTIONS bigint not null)") }
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};
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PFS_engine_table* table_users::create()
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{
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return new table_users();
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}
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int
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table_users::delete_all_rows(void)
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{
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reset_events_waits_by_thread();
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reset_events_waits_by_account();
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reset_events_waits_by_user();
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reset_events_stages_by_thread();
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reset_events_stages_by_account();
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reset_events_stages_by_user();
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reset_events_statements_by_thread();
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reset_events_statements_by_account();
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reset_events_statements_by_user();
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purge_all_account();
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purge_all_user();
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return 0;
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}
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table_users::table_users()
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: cursor_by_user(& m_share),
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m_row_exists(false)
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{}
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void table_users::make_row(PFS_user *pfs)
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{
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pfs_lock lock;
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m_row_exists= false;
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pfs->m_lock.begin_optimistic_lock(&lock);
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if (m_row.m_user.make_row(pfs))
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return;
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PFS_connection_stat_visitor visitor;
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PFS_connection_iterator::visit_user(pfs, true, true, & visitor);
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if (! pfs->m_lock.end_optimistic_lock(& lock))
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return;
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m_row.m_connection_stat.set(& visitor.m_stat);
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m_row_exists= true;
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}
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int table_users::read_row_values(TABLE *table,
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unsigned char *buf,
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Field **fields,
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bool read_all)
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{
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Field *f;
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if (unlikely(! m_row_exists))
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return HA_ERR_RECORD_DELETED;
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/* Set the null bits */
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DBUG_ASSERT(table->s->null_bytes == 1);
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buf[0]= 0;
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for (; (f= *fields) ; fields++)
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{
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if (read_all || bitmap_is_set(table->read_set, f->field_index))
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{
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switch(f->field_index)
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{
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case 0: /* USER */
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m_row.m_user.set_field(f);
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break;
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case 1: /* CURRENT_CONNECTIONS */
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case 2: /* TOTAL_CONNECTIONS */
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m_row.m_connection_stat.set_field(f->field_index - 1, f);
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break;
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default:
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DBUG_ASSERT(false);
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}
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}
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}
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return 0;
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}
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