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WL#2360 Performance schema

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Part IV: sql instrumentation
This commit is contained in:
Marc Alff
2010-01-06 22:42:07 -07:00
parent 4b559b912f
commit 3d91522561
133 changed files with 5198 additions and 2295 deletions
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55
sql/handler.h
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@ -1,7 +1,7 @@
#ifndef HANDLER_INCLUDED
#define HANDLER_INCLUDED
/* Copyright 2000-2008 MySQL AB, 2008 Sun Microsystems, Inc.
/* Copyright 2000-2008 MySQL AB, 2008-2009 Sun Microsystems, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@ -16,7 +16,6 @@
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/* Definitions for parameters to do with handler-routines */
#ifdef USE_PRAGMA_INTERFACE
@ -305,6 +304,8 @@ enum legacy_db_type
DB_TYPE_MEMCACHE,
DB_TYPE_FALCON,
DB_TYPE_MARIA,
/** Performance schema engine. */
DB_TYPE_PERFORMANCE_SCHEMA,
DB_TYPE_FIRST_DYNAMIC=42,
DB_TYPE_DEFAULT=127 // Must be last
};
@ -1216,6 +1217,20 @@ public:
*/
uint auto_inc_intervals_count;
/**
Instrumented table associated with this handler.
This member should be set to NULL when no instrumentation is in place,
so that linking an instrumented/non instrumented server/plugin works.
For example:
- the server is compiled with the instrumentation.
The server expects either NULL or valid pointers in m_psi.
- an engine plugin is compiled without instrumentation.
The plugin can not leave this pointer uninitialized,
or can not leave a trash value on purpose in this pointer,
as this would crash the server.
*/
PSI_table *m_psi;
handler(handlerton *ht_arg, TABLE_SHARE *share_arg)
:table_share(share_arg), table(0),
estimation_rows_to_insert(0), ht(ht_arg),
@ -1224,7 +1239,8 @@ public:
ft_handler(0), inited(NONE),
locked(FALSE), implicit_emptied(0),
pushed_cond(0), next_insert_id(0), insert_id_for_cur_row(0),
auto_inc_intervals_count(0)
auto_inc_intervals_count(0),
m_psi(NULL)
{}
virtual ~handler(void)
{
@ -1824,6 +1840,39 @@ protected:
void **ha_data(THD *) const;
THD *ha_thd(void) const;
/**
Acquire the instrumented table information from a table share.
@param share a table share
@return an instrumented table share, or NULL.
*/
PSI_table_share *ha_table_share_psi(const TABLE_SHARE *share) const;
inline void psi_open()
{
DBUG_ASSERT(m_psi == NULL);
DBUG_ASSERT(table_share != NULL);
#ifdef HAVE_PSI_INTERFACE
if (PSI_server)
{
PSI_table_share *share_psi= ha_table_share_psi(table_share);
if (share_psi)
m_psi= PSI_server->open_table(share_psi, this);
}
#endif
}
inline void psi_close()
{
#ifdef HAVE_PSI_INTERFACE
if (PSI_server && m_psi)
{
PSI_server->close_table(m_psi);
m_psi= NULL; /* instrumentation handle, invalid after close_table() */
}
#endif
DBUG_ASSERT(m_psi == NULL);
}
/**
Default rename_table() and delete_table() rename/delete files with a
given name and extensions from bas_ext().