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/* Copyright (c) 2000, 2023, 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 */ /* Implementation of SHOW commands. */ #include "sql_cmd_show.h" #include "sql_parse.h" // execute_sqlcom_select /* MAINTAINER: This code is a backport from MySQL 8.0 into MySQL 5.7, stripped down to the bare minimum. See the full implementation in 8.0 */ bool Sql_cmd_show::execute(THD *thd) { if (check_privileges(thd)) { return true; } return execute_inner(thd); } bool Sql_cmd_show::check_privileges(THD *thd) { LEX *lex = thd->lex; if (lex->query_tables == NULL) return false; // If SHOW command is represented by a plan, ensure user has privileges: return check_table_access(thd, SELECT_ACL, lex->query_tables, false, UINT_MAX, false); } bool Sql_cmd_show::execute_inner(THD *thd) { return execute_sqlcom_select(thd, thd->lex->query_tables); } bool Sql_cmd_show_processlist::check_privileges(THD *thd) { if (!thd->security_context()->priv_user().str[0] && check_global_access(thd, PROCESS_ACL)) { return true; } return Sql_cmd_show::check_privileges(thd); } bool Sql_cmd_show_processlist::execute_inner(THD *thd) { bool rc; /* If the Performance Schema is configured to support SHOW PROCESSLIST, then execute a query on performance_schema.processlist. Otherwise, fall back to the legacy method. */ if (use_pfs()) { DEBUG_SYNC(thd, "pfs_show_processlist_performance_schema"); rc = Sql_cmd_show::execute_inner(thd); } else { DEBUG_SYNC(thd, "pfs_show_processlist_legacy"); mysqld_list_processes(thd, thd->security_context()->check_access(PROCESS_ACL) ? NullS : thd->security_context()->priv_user().str, m_verbose); rc = false; } return rc; }