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

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Transaction tracker
This commit is contained in:
Oleksandr Byelkin
2016-05-30 21:22:50 +02:00
parent c8948b0d0d
commit 0ee3e64c55
32 changed files with 1173 additions and 270 deletions
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37
sql/lock.cc
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@@ -90,6 +90,7 @@ extern HASH open_cache;
static int lock_external(THD *thd, TABLE **table,uint count);
static int unlock_external(THD *thd, TABLE **table,uint count);
/* Map the return value of thr_lock to an error from errmsg.txt */
static int thr_lock_errno_to_mysql[]=
{ 0, ER_LOCK_ABORTED, ER_LOCK_WAIT_TIMEOUT, ER_LOCK_DEADLOCK };
@@ -243,6 +244,39 @@ void reset_lock_data(MYSQL_LOCK *sql_lock, bool unlock)
}
/**
Scan array of tables for access types; update transaction tracker
accordingly.
@param thd The current thread.
@param tables An array of pointers to the tables to lock.
@param count The number of tables to lock.
*/
#ifndef EMBEDDED_LIBRARY
static void track_table_access(THD *thd, TABLE **tables, size_t count)
{
if (thd->variables.session_track_transaction_info > TX_TRACK_NONE)
{
Transaction_state_tracker *tst= (Transaction_state_tracker *)
thd->session_tracker.get_tracker(TRANSACTION_INFO_TRACKER);
while (count--)
{
TABLE *t= tables[count];
if (t)
tst->add_trx_state(thd, t->reginfo.lock_type,
t->file->has_transactions());
}
}
}
#else
#define track_table_access(A,B,C)
#endif //EMBEDDED_LIBRARY
/**
Lock tables.
@@ -280,6 +314,9 @@ MYSQL_LOCK *mysql_lock_tables(THD *thd, TABLE **tables, uint count, uint flags)
my_free(sql_lock);
sql_lock= 0;
}
track_table_access(thd, tables, count);
DBUG_RETURN(sql_lock);
}