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/* Copyright (C) 2000-2006 MySQL AB
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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
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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* Copyright (C) 2008 Sun Microsystems
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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
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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/*****************************************************************************
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** This file implements classes defined in sql_class.h
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** This file implements classes defined in session.h
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** Especially the classes to handle a result from a select
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*****************************************************************************/
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#include <drizzled/server_includes.h>
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#include "rpl_record.h"
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#include "log_event.h"
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#include <drizzled/session.h>
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#include <sys/stat.h>
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#include <mysys/thr_alarm.h>
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#include <mysys/mysys_err.h>
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#include <drizzled/drizzled_error_messages.h>
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#include <drizzled/error.h>
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#include <drizzled/query_id.h>
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#include <drizzled/data_home.h>
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#include <drizzled/sql_base.h>
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#include <drizzled/lock.h>
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#include <drizzled/item/cache.h>
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#include <drizzled/item/float.h>
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#include <drizzled/item/return_int.h>
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#include <drizzled/item/empty_string.h>
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#include <drizzled/show.h>
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#include <drizzled/plugin_scheduling.h>
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extern scheduling_st thread_scheduler;
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The following is used to initialise Table_ident with a internal
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int thd_in_lock_tables(const THD *thd)
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return test(thd->in_lock_tables);
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int thd_tablespace_op(const THD *thd)
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return test(thd->tablespace_op);
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const char *set_thd_proc_info(THD *thd, const char *info,
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const char *calling_function __attribute__((unused)),
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const char *calling_file __attribute__((unused)),
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const unsigned int calling_line __attribute__((unused)))
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const char *old_info= thd->get_proc_info();
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thd->set_proc_info(info);
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void **thd_ha_data(const THD *thd, const struct handlerton *hton)
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return (void **) &thd->ha_data[hton->slot].ha_ptr;
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int64_t thd_test_options(const THD *thd, int64_t test_options)
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return thd->options & test_options;
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int thd_sql_command(const THD *thd)
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return (int) thd->lex->sql_command;
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int thd_tx_isolation(const THD *thd)
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return (int) thd->variables.tx_isolation;
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void thd_inc_row_count(THD *thd)
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Clear this diagnostics area.
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int session_in_lock_tables(const Session *session)
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return test(session->in_lock_tables);
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int session_tablespace_op(const Session *session)
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return test(session->tablespace_op);
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Set the process info field of the Session structure.
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This function is used by plug-ins. Internally, the
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Session::set_proc_info() function should be used.
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@see Session::set_proc_info
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set_session_proc_info(Session *session, const char *info)
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session->set_proc_info(info);
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const char *get_session_proc_info(Session *session)
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return session->get_proc_info();
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void **session_ha_data(const Session *session, const struct handlerton *hton)
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return (void **) &session->ha_data[hton->slot].ha_ptr;
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int64_t session_test_options(const Session *session, int64_t test_options)
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return session->options & test_options;
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int session_sql_command(const Session *session)
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return (int) session->lex->sql_command;
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int session_tx_isolation(const Session *session)
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return (int) session->variables.tx_isolation;
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void session_inc_row_count(Session *session)
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session->row_count++;
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Clear this diagnostics area.
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Normally called at the end of a statement.
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void THD::pop_internal_handler()
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void Session::pop_internal_handler()
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assert(m_internal_handler != NULL);
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m_internal_handler= NULL;
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void *thd_alloc(DRIZZLE_THD thd, unsigned int size)
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return thd->alloc(size);
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void *thd_calloc(DRIZZLE_THD thd, unsigned int size)
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return thd->calloc(size);
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char *thd_strdup(DRIZZLE_THD thd, const char *str)
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return thd->strdup(str);
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char *thd_strmake(DRIZZLE_THD thd, const char *str, unsigned int size)
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return thd->strmake(str, size);
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LEX_STRING *thd_make_lex_string(THD *thd, LEX_STRING *lex_str,
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const char *str, unsigned int size,
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int allocate_lex_string)
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return thd->make_lex_string(lex_str, str, size,
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(bool) allocate_lex_string);
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void *thd_memdup(DRIZZLE_THD thd, const void* str, unsigned int size)
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return thd->memdup(str, size);
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void thd_get_xid(const DRIZZLE_THD thd, DRIZZLE_XID *xid)
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*xid = *(DRIZZLE_XID *) &thd->transaction.xid_state.xid;
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#if defined(__cplusplus)
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void *session_alloc(Session *session, unsigned int size)
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return session->alloc(size);
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void *session_calloc(Session *session, unsigned int size)
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return session->calloc(size);
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char *session_strdup(Session *session, const char *str)
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return session->strdup(str);
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char *session_strmake(Session *session, const char *str, unsigned int size)
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return session->strmake(str, size);
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void *session_memdup(Session *session, const void* str, unsigned int size)
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return session->memdup(str, size);
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void session_get_xid(const Session *session, DRIZZLE_XID *xid)
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*xid = *(DRIZZLE_XID *) &session->transaction.xid_state.xid;
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#if defined(__cplusplus)
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Init common variables that has to be reset on start and on change_user
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void Session::init(void)
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pthread_mutex_lock(&LOCK_global_system_variables);
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plugin_thdvar_init(this);
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variables.time_format= date_time_format_copy((THD*) 0,
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plugin_sessionvar_init(this);
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variables.time_format= date_time_format_copy((Session*) 0,
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variables.time_format);
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variables.date_format= date_time_format_copy((THD*) 0,
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variables.date_format= date_time_format_copy((Session*) 0,
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variables.date_format);
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variables.datetime_format= date_time_format_copy((THD*) 0,
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variables.datetime_format= date_time_format_copy((Session*) 0,
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variables.datetime_format);
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variables= global_system_variables above has reset
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/*****************************************************************************
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** Functions to provide a interface to select results
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*****************************************************************************/
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select_result::select_result()
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void select_result::send_error(uint32_t errcode,const char *err)
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my_message(errcode, err, MYF(0));
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void select_result::cleanup()
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bool select_result::check_simple_select() const
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my_error(ER_SP_BAD_CURSOR_QUERY, MYF(0));
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static String default_line_term("\n",default_charset_info);
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static String default_escaped("\\",default_charset_info);
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static String default_field_term("\t",default_charset_info);
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sql_exchange::sql_exchange(char *name, bool flag,
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enum enum_filetype filetype_arg)
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:file_name(name), opt_enclosed(0), dumpfile(flag), skip_lines(0)
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filetype= filetype_arg;
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field_term= &default_field_term;
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enclosed= line_start= &my_empty_string;
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line_term= &default_line_term;
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escaped= &default_escaped;
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bool select_send::send_fields(List<Item> &list, uint32_t flags)
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if (!(res= thd->protocol->send_fields(&list, flags)))
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is_result_set_started= 1;
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void select_send::abort()
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Cleanup an instance of this class for re-use
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at next execution of a prepared statement/
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stored procedure statement.
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void select_send::cleanup()
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is_result_set_started= false;
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/* Send data to client. Returns 0 if ok */
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bool select_send::send_data(List<Item> &items)
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if (unit->offset_limit_cnt)
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{ // using limit offset,count
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unit->offset_limit_cnt--;
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We may be passing the control from mysqld to the client: release the
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InnoDB adaptive hash S-latch to avoid thread deadlocks if it was reserved
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ha_release_temporary_latches(thd);
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List_iterator_fast<Item> li(items);
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Protocol *protocol= thd->protocol;
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char buff[MAX_FIELD_WIDTH];
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String buffer(buff, sizeof(buff), &my_charset_bin);
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protocol->prepare_for_resend();
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if (item->send(protocol, &buffer))
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protocol->free(); // Free used buffer
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my_message(ER_OUT_OF_RESOURCES, ER(ER_OUT_OF_RESOURCES), MYF(0));
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thd->sent_row_count++;
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if (thd->is_error())
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protocol->remove_last_row();
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return(protocol->write());
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bool select_send::send_eof()
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We may be passing the control from mysqld to the client: release the
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InnoDB adaptive hash S-latch to avoid thread deadlocks if it was reserved
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ha_release_temporary_latches(thd);
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/* Unlock tables before sending packet to gain some speed */
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mysql_unlock_tables(thd, thd->lock);
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is_result_set_started= 0;
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/************************************************************************
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1232
Handling writing to file
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************************************************************************/
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bool Session::set_db(const char *new_db, size_t new_db_len)
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/* Do not reallocate memory if current chunk is big enough. */
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if (db && new_db && db_length >= new_db_len)
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memcpy(db, new_db, new_db_len+1);
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db= (char *)malloc(new_db_len + 1);
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memcpy(db, new_db, new_db_len);
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db_length= db ? new_db_len : 0;
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return new_db && !db;
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1989
Check the killed state of a user thread
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@param thd user thread
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@param session user thread
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@retval 0 the user thread is active
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1992
@retval 1 the user thread has been killed
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extern "C" int thd_killed(const DRIZZLE_THD thd)
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extern "C" int session_killed(const Session *session)
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return(thd->killed);
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return(session->killed);
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Return the thread id of a user thread
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@param thd user thread
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@param session user thread
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@return thread id
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extern "C" unsigned long thd_get_thread_id(const DRIZZLE_THD thd)
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return((unsigned long)thd->thread_id);
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#ifdef INNODB_COMPATIBILITY_HOOKS
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extern "C" const struct charset_info_st *thd_charset(DRIZZLE_THD thd)
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return(thd->charset());
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extern "C" char **thd_query(DRIZZLE_THD thd)
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return(&thd->query);
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extern "C" int thd_slave_thread(const DRIZZLE_THD thd)
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return(thd->slave_thread);
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extern "C" int thd_non_transactional_update(const DRIZZLE_THD thd)
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return(thd->transaction.all.modified_non_trans_table);
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extern "C" int thd_binlog_format(const DRIZZLE_THD thd)
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return (int) thd->variables.binlog_format;
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extern "C" void thd_mark_transaction_to_rollback(DRIZZLE_THD thd, bool all)
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mark_transaction_to_rollback(thd, all);
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#endif // INNODB_COMPATIBILITY_HOOKS */
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extern "C" unsigned long session_get_thread_id(const Session *session)
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return((unsigned long)session->thread_id);
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LEX_STRING *session_make_lex_string(Session *session, LEX_STRING *lex_str,
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const char *str, unsigned int size,
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int allocate_lex_string)
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return session->make_lex_string(lex_str, str, size,
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(bool) allocate_lex_string);
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extern "C" const struct charset_info_st *session_charset(Session *session)
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return(session->charset());
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extern "C" char **session_query(Session *session)
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return(&session->query);
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extern "C" int session_non_transactional_update(const Session *session)
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return(session->transaction.all.modified_non_trans_table);
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extern "C" void session_mark_transaction_to_rollback(Session *session, bool all)
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mark_transaction_to_rollback(session, all);
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2041
Mark transaction to rollback and mark error as fatal to a sub-statement.
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@param thd Thread handle
2043
@param session Thread handle
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2044
@param all true <=> rollback main transaction.
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void mark_transaction_to_rollback(THD *thd, bool all)
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void mark_transaction_to_rollback(Session *session, bool all)
2240
thd->is_fatal_sub_stmt_error= true;
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thd->transaction_rollback_request= all;
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session->is_fatal_sub_stmt_error= true;
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session->transaction_rollback_request= all;
2244
2055
/***************************************************************************
2328
2139
pthread_mutex_unlock(&LOCK_xid_cache);
2332
Implementation of interface to write rows to the binary log through the
2333
thread. The thread is responsible for writing the rows it has
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inserted/updated/deleted.
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Template member function for ensuring that there is an rows log
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event of the apropriate type before proceeding.
2343
- Events of type 'RowEventT' have the type code 'type_code'.
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If a non-NULL pointer is returned, the pending event for thread 'thd' will
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be an event of type 'RowEventT' (which have the type code 'type_code')
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will either empty or have enough space to hold 'needed' bytes. In
2349
addition, the columns bitmap will be correct for the row, meaning that
2350
the pending event will be flushed if the columns in the event differ from
2351
the columns suppled to the function.
2354
If no error, a non-NULL pending event (either one which already existed or
2355
the newly created one).
2359
template <class RowsEventT> Rows_log_event*
2360
THD::binlog_prepare_pending_rows_event(Table* table, uint32_t serv_id,
2362
bool is_transactional,
2363
RowsEventT *hint __attribute__((unused)))
2365
/* Pre-conditions */
2366
assert(table->s->table_map_id != UINT32_MAX);
2368
/* Fetch the type code for the RowsEventT template parameter */
2369
int const type_code= RowsEventT::TYPE_CODE;
2372
There is no good place to set up the transactional data, so we
2375
if (binlog_setup_trx_data())
2378
Rows_log_event* pending= binlog_get_pending_rows_event();
2380
if (unlikely(pending && !pending->is_valid()))
2384
Check if the current event is non-NULL and a write-rows
2385
event. Also check if the table provided is mapped: if it is not,
2386
then we have switched to writing to a new table.
2387
If there is no pending event, we need to create one. If there is a pending
2388
event, but it's not about the same table id, or not of the same type
2389
(between Write, Update and Delete), or not the same affected columns, or
2390
going to be too big, flush this event to disk and create a new pending
2393
The last test is necessary for the Cluster injector to work
2394
correctly. The reason is that the Cluster can inject two write
2395
rows with different column bitmaps if there is an insert followed
2396
by an update in the same transaction, and these are grouped into a
2397
single epoch/transaction when fed to the injector.
2399
TODO: Fix the code so that the last test can be removed.
2402
pending->server_id != serv_id ||
2403
pending->get_table_id() != table->s->table_map_id ||
2404
pending->get_type_code() != type_code ||
2405
pending->get_data_size() + needed > opt_binlog_rows_event_max_size ||
2406
!bitmap_cmp(pending->get_cols(), table->write_set))
2408
/* Create a new RowsEventT... */
2409
Rows_log_event* const
2410
ev= new RowsEventT(this, table, table->s->table_map_id,
2414
ev->server_id= serv_id; // I don't like this, it's too easy to forget.
2416
flush the pending event and replace it with the newly created
2419
if (unlikely(mysql_bin_log.flush_and_set_pending_rows_event(this, ev)))
2425
return(ev); /* This is the new pending event */
2427
return(pending); /* This is the current pending event */
2430
#ifdef HAVE_EXPLICIT_TEMPLATE_INSTANTIATION
2432
Instantiate the versions we need, we have -fno-implicit-template as
2435
template Rows_log_event*
2436
THD::binlog_prepare_pending_rows_event(Table*, uint32_t, size_t, bool,
2437
Write_rows_log_event*);
2439
template Rows_log_event*
2440
THD::binlog_prepare_pending_rows_event(Table*, uint32_t, size_t, bool,
2441
Delete_rows_log_event *);
2443
template Rows_log_event*
2444
THD::binlog_prepare_pending_rows_event(Table*, uint32_t, size_t, bool,
2445
Update_rows_log_event *);
2450
2144
Class to handle temporary allocation of memory for row data.
2562
int THD::binlog_write_row(Table* table, bool is_trans,
2563
unsigned char const *record)
2565
assert(current_stmt_binlog_row_based && mysql_bin_log.is_open());
2568
Pack records into format for transfer. We are allocating more
2569
memory than needed, but that doesn't matter.
2571
Row_data_memory memory(table, table->max_row_length(record));
2572
if (!memory.has_memory())
2573
return HA_ERR_OUT_OF_MEM;
2575
unsigned char *row_data= memory.slot(0);
2577
size_t const len= pack_row(table, table->write_set, row_data, record);
2579
Rows_log_event* const ev=
2580
binlog_prepare_pending_rows_event(table, server_id, len, is_trans,
2581
static_cast<Write_rows_log_event*>(0));
2583
if (unlikely(ev == 0))
2584
return HA_ERR_OUT_OF_MEM;
2586
return ev->add_row_data(row_data, len);
2589
int THD::binlog_update_row(Table* table, bool is_trans,
2590
const unsigned char *before_record,
2591
const unsigned char *after_record)
2593
assert(current_stmt_binlog_row_based && mysql_bin_log.is_open());
2595
size_t const before_maxlen = table->max_row_length(before_record);
2596
size_t const after_maxlen = table->max_row_length(after_record);
2598
Row_data_memory row_data(table, before_maxlen, after_maxlen);
2599
if (!row_data.has_memory())
2600
return HA_ERR_OUT_OF_MEM;
2602
unsigned char *before_row= row_data.slot(0);
2603
unsigned char *after_row= row_data.slot(1);
2605
size_t const before_size= pack_row(table, table->read_set, before_row,
2607
size_t const after_size= pack_row(table, table->write_set, after_row,
2610
Rows_log_event* const ev=
2611
binlog_prepare_pending_rows_event(table, server_id,
2612
before_size + after_size, is_trans,
2613
static_cast<Update_rows_log_event*>(0));
2615
if (unlikely(ev == 0))
2616
return HA_ERR_OUT_OF_MEM;
2619
ev->add_row_data(before_row, before_size) ||
2620
ev->add_row_data(after_row, after_size);
2623
int THD::binlog_delete_row(Table* table, bool is_trans,
2624
unsigned char const *record)
2626
assert(current_stmt_binlog_row_based && mysql_bin_log.is_open());
2629
Pack records into format for transfer. We are allocating more
2630
memory than needed, but that doesn't matter.
2632
Row_data_memory memory(table, table->max_row_length(record));
2633
if (unlikely(!memory.has_memory()))
2634
return HA_ERR_OUT_OF_MEM;
2636
unsigned char *row_data= memory.slot(0);
2638
size_t const len= pack_row(table, table->read_set, row_data, record);
2640
Rows_log_event* const ev=
2641
binlog_prepare_pending_rows_event(table, server_id, len, is_trans,
2642
static_cast<Delete_rows_log_event*>(0));
2644
if (unlikely(ev == 0))
2645
return HA_ERR_OUT_OF_MEM;
2647
return ev->add_row_data(row_data, len);
2651
int THD::binlog_flush_pending_rows_event(bool stmt_end)
2654
We shall flush the pending event even if we are not in row-based
2655
mode: it might be the case that we left row-based mode before
2656
flushing anything (e.g., if we have explicitly locked tables).
2658
if (!mysql_bin_log.is_open())
2662
Mark the event as the last event of a statement if the stmt_end
2666
if (Rows_log_event *pending= binlog_get_pending_rows_event())
2670
pending->set_flags(Rows_log_event::STMT_END_F);
2671
pending->flags|= LOG_EVENT_UPDATE_TABLE_MAP_VERSION_F;
2672
binlog_table_maps= 0;
2675
error= mysql_bin_log.flush_and_set_pending_rows_event(this, 0);
2258
@param session Thread handle
2259
@param errcode Error code to print to console
2260
@param should_lock 1 if we have have to lock LOCK_thread_count
2263
For the connection that is doing shutdown, this is called twice
2265
void Session::close_connection(uint32_t errcode, bool should_lock)
2269
(void) pthread_mutex_lock(&LOCK_thread_count);
2270
killed= Session::KILL_CONNECTION;
2271
if ((vio= net.vio) != 0)
2274
net_send_error(this, errcode, ER(errcode)); /* purecov: inspected */
2275
drizzleclient_net_close(&net); /* vio is freed in delete session */
2278
(void) pthread_mutex_unlock(&LOCK_thread_count);
2284
Reset Session part responsible for command processing state.
2286
This needs to be called before execution of every statement
2287
(prepared or conventional).
2288
It is not called by substatements of routines.
2291
Make it a method of Session and align its name with the rest of
2292
reset/end/start/init methods.
2294
Call it after we use Session for queries, not before.
2297
void Session::reset_for_next_command()
2302
Those two lines below are theoretically unneeded as
2303
Session::cleanup_after_query() should take care of this already.
2305
auto_inc_intervals_in_cur_stmt_for_binlog.empty();
2308
server_status&= ~ (SERVER_MORE_RESULTS_EXISTS |
2309
SERVER_QUERY_NO_INDEX_USED |
2310
SERVER_QUERY_NO_GOOD_INDEX_USED);
2312
If in autocommit mode and not in a transaction, reset
2313
OPTION_STATUS_NO_TRANS_UPDATE | OPTION_KEEP_LOG to not get warnings
2314
in ha_rollback_trans() about some tables couldn't be rolled back.
2316
if (!(options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)))
2318
options&= ~OPTION_KEEP_LOG;
2319
transaction.all.modified_non_trans_table= false;
2321
thread_specific_used= false;
2324
main_da.reset_diagnostics_area();
2325
total_warn_count=0; // Warnings for this query
2326
sent_row_count= examined_row_count= 0;
2333
return true if the table was created explicitly.
2335
inline bool is_user_table(Table * table)
2337
const char *name= table->s->table_name.str;
2338
return strncmp(name, TMP_FILE_PREFIX, TMP_FILE_PREFIX_LENGTH);
2683
Member function that will log query, either row-based or
2684
statement-based depending on the value of the 'current_stmt_binlog_row_based'
2685
the value of the 'qtype' flag.
2687
This function should be called after the all calls to ha_*_row()
2688
functions have been issued, but before tables are unlocked and
2692
There shall be no writes to any system table after calling
2693
binlog_query(), so these writes has to be moved to before the call
2694
of binlog_query() for correct functioning.
2696
This is necessesary not only for RBR, but the master might crash
2697
after binlogging the query but before changing the system tables.
2698
This means that the slave and the master are not in the same state
2699
(after the master has restarted), so therefore we have to
2700
eliminate this problem.
2703
Error code, or 0 if no error.
2342
Close all temporary tables created by 'CREATE TEMPORARY TABLE' for thread
2343
creates one DROP TEMPORARY Table binlog event for each pseudo-thread
2705
int THD::binlog_query(THD::enum_binlog_query_type qtype, char const *query_arg,
2706
ulong query_len, bool is_trans, bool suppress_use,
2707
THD::killed_state killed_status_arg)
2709
assert(query_arg && mysql_bin_log.is_open());
2711
if (int error= binlog_flush_pending_rows_event(true))
2715
If we are in statement mode and trying to log an unsafe statement,
2716
we should print a warning.
2718
if (lex->is_stmt_unsafe() &&
2719
variables.binlog_format == BINLOG_FORMAT_STMT)
2721
assert(this->query != NULL);
2722
push_warning(this, DRIZZLE_ERROR::WARN_LEVEL_WARN,
2723
ER_BINLOG_UNSAFE_STATEMENT,
2724
ER(ER_BINLOG_UNSAFE_STATEMENT));
2725
if (!(binlog_flags & BINLOG_FLAG_UNSAFE_STMT_PRINTED))
2727
char warn_buf[DRIZZLE_ERRMSG_SIZE];
2728
snprintf(warn_buf, DRIZZLE_ERRMSG_SIZE, "%s Statement: %s",
2729
ER(ER_BINLOG_UNSAFE_STATEMENT), this->query);
2730
sql_print_warning(warn_buf);
2731
binlog_flags|= BINLOG_FLAG_UNSAFE_STMT_PRINTED;
2736
case THD::ROW_QUERY_TYPE:
2737
if (current_stmt_binlog_row_based)
2739
/* Otherwise, we fall through */
2740
case THD::DRIZZLE_QUERY_TYPE:
2742
Using this query type is a conveniece hack, since we have been
2743
moving back and forth between using RBR for replication of
2744
system tables and not using it.
2746
Make sure to change in check_table_binlog_row_based() according
2747
to how you treat this.
2749
case THD::STMT_QUERY_TYPE:
2751
The DRIZZLE_LOG::write() function will set the STMT_END_F flag and
2752
flush the pending rows event if necessary.
2755
Query_log_event qinfo(this, query_arg, query_len, is_trans, suppress_use,
2757
qinfo.flags|= LOG_EVENT_UPDATE_TABLE_MAP_VERSION_F;
2759
Binlog table maps will be irrelevant after a Query_log_event
2760
(they are just removed on the slave side) so after the query
2761
log event is written to the binary log, we pretend that no
2762
table maps were written.
2764
int error= mysql_bin_log.write(&qinfo);
2765
binlog_table_maps= 0;
2770
case THD::QUERY_TYPE_COUNT:
2772
assert(0 <= qtype && qtype < QUERY_TYPE_COUNT);
2777
bool Discrete_intervals_list::append(uint64_t start, uint64_t val,
2780
/* first, see if this can be merged with previous */
2781
if ((head == NULL) || tail->merge_if_contiguous(start, val, incr))
2783
/* it cannot, so need to add a new interval */
2784
Discrete_interval *new_interval= new Discrete_interval(start, val, incr);
2785
return(append(new_interval));
2790
bool Discrete_intervals_list::append(Discrete_interval *new_interval)
2792
if (unlikely(new_interval == NULL))
2795
head= current= new_interval;
2797
tail->next= new_interval;
2346
void Session::close_temporary_tables()
2351
if (!temporary_tables)
2354
for (table= temporary_tables; table; table= tmp_next)
2356
tmp_next= table->next;
2357
close_temporary(table, 1, 1);
2359
temporary_tables= 0;
2365
/** Clear most status variables. */
2366
extern time_t flush_status_time;
2367
extern uint32_t max_used_connections;
2369
void Session::refresh_status()
2371
pthread_mutex_lock(&LOCK_status);
2373
/* Add thread's status variabes to global status */
2374
add_to_status(&global_status_var, &status_var);
2376
/* Reset thread's status variables */
2377
memset(&status_var, 0, sizeof(status_var));
2379
/* Reset some global variables */
2380
reset_status_vars();
2382
/* Reset the counters of all key caches (default and named). */
2383
process_key_caches(reset_key_cache_counters);
2384
flush_status_time= time((time_t*) 0);
2385
max_used_connections= 1; /* We set it to one, because we know we exist */
2386
pthread_mutex_unlock(&LOCK_status);