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MDEV-7648: Extra data in ANALYZE FORMAT=JSON $stmt

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Switch from relying on PERFORMANCE_SCHEMA to using our
own hooks for counting the time spent reading rows from
tables.
This commit is contained in:
Sergei Petrunia
2015-03-24 16:17:41 +03:00
parent b273e4a5c0
commit 77e16ce7d6
12 changed files with 117 additions and 157 deletions
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50
sql/sql_analyze_stmt.h Normal file
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/*
Copyright (c) 2015 MariaDB Corporation Ab
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
the Free Software Foundation; version 2 of the License.
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 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/*
A class for tracking time it takes to do a certain action
*/
class Exec_time_tracker
{
ulonglong count;
ulonglong cycles;
ulonglong last_start;
public:
Exec_time_tracker() : count(0), cycles(0) {}
// interface for collecting time
void start_tracking()
{
last_start= my_timer_cycles();
}
void stop_tracking()
{
ulonglong last_end= my_timer_cycles();
count++;
cycles += last_end - last_start;
}
// interface for getting the time
ulonglong get_loops() { return count; }
double get_time_ms()
{
// convert 'cycles' to milliseconds.
return 1000 * ((double)cycles) / sys_timer_info.cycles.frequency;
}
};