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MDEV-8931: (server part of) session state tracking

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System variables tracking
This commit is contained in:
Oleksandr Byelkin
2016-04-15 20:47:45 +02:00
parent e7608a78ef
commit c8948b0d0d
22 changed files with 1486 additions and 156 deletions
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22
sql/session_tracker.h
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@ -104,6 +104,12 @@ public:
virtual void mark_as_changed(THD *thd, LEX_CSTRING *name)= 0;
};
bool sysvartrack_validate_value(THD *thd, const char *str, size_t len);
bool sysvartrack_reprint_value(THD *thd, char *str, size_t len);
bool sysvartrack_update(THD *thd);
size_t sysvartrack_value_len(THD *thd);
bool sysvartrack_value_construct(THD *thd, char *val, size_t len);
/**
Session_tracker
@ -134,10 +140,22 @@ public:
Session_tracker();
~Session_tracker()
{
for (int i= 0; i <= SESSION_TRACKER_END; i ++)
delete m_trackers[i];
deinit();
}
/* trick to make happy memory accounting system */
void deinit()
{
for (int i= 0; i <= SESSION_TRACKER_END; i ++)
{
if (m_trackers[i])
delete m_trackers[i];
m_trackers[i]= NULL;
}
}
void enable(THD *thd);
bool server_boot_verify(const CHARSET_INFO *char_set);
/** Returns the pointer to the tracker object for the specified tracker. */
inline State_tracker *get_tracker(enum_session_tracker tracker) const