text: -- Copyright (c) 2014, 2019, Oracle and/or its affiliates. All rights reserved.
  --
  -- 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  
  --
  -- View: statements_with_runtimes_in_95th_percentile
  --
  -- List all statements whose average runtime, in microseconds, is in the top 95th percentile.
  -- 
  -- mysql> select * from statements_with_runtimes_in_95th_percentile limit 5;
  -- +-------------------------------------------------------------------+------+-----------+------------+-----------+------------+---------------+-------------+-------------+-----------+---------------+---------------+-------------------+---------------------+---------------------+----------------------------------+
  -- | query                                                             | db   | full_scan | exec_count | err_count | warn_count | total_latency | max_latency | avg_latency | rows_sent | rows_sent_avg | rows_examined | rows_examined_avg | FIRST_SEEN          | LAST_SEEN           | digest                           |
  -- +-------------------------------------------------------------------+------+-----------+------------+-----------+------------+---------------+-------------+-------------+-----------+---------------+---------------+-------------------+---------------------+---------------------+----------------------------------+
  -- | SELECT `e` . `round_robin_bin` ...  `timestamp` = `maxes` . `ts`  | mem  | *         |         14 |         0 |          0 | 43.96 s       | 6.69 s      | 3.14 s      |        11 |             1 |        253170 |             18084 | 2013-12-04 20:05:01 | 2013-12-04 20:06:34 | 29ba002bf039bb6439357a10134407de |
  -- | SELECT `e` . `round_robin_bin` ...  `timestamp` = `maxes` . `ts`  | mem  | *         |          8 |         0 |          0 | 17.89 s       | 4.12 s      | 2.24 s      |         7 |             1 |        169534 |             21192 | 2013-12-04 20:04:54 | 2013-12-04 20:05:05 | 0b1c1f91e7e9e0ff91aa49d15f540793 |
  -- | SELECT `e` . `round_robin_bin` ...  `timestamp` = `maxes` . `ts`  | mem  | *         |          1 |         0 |          0 | 2.22 s        | 2.22 s      | 2.22 s      |         1 |             1 |         40322 |             40322 | 2013-12-04 20:05:39 | 2013-12-04 20:05:39 | 07b27145c8f8a3779737df5032374833 |
  -- | SELECT `e` . `round_robin_bin` ...  `timestamp` = `maxes` . `ts`  | mem  | *         |          1 |         0 |          0 | 1.97 s        | 1.97 s      | 1.97 s      |         1 |             1 |         40322 |             40322 | 2013-12-04 20:05:39 | 2013-12-04 20:05:39 | a07488137ea5c1bccf3e291c50bfd21f |
  -- | SELECT `e` . `round_robin_bin` ...  `timestamp` = `maxes` . `ts`  | mem  | *         |          2 |         0 |          0 | 3.91 s        | 3.91 s      | 1.96 s      |         1 |             1 |         13126 |              6563 | 2013-12-04 20:05:04 | 2013-12-04 20:06:34 | b8bddc6566366dafc7e474f67096a93b |
  -- +-------------------------------------------------------------------+------+-----------+------------+-----------+------------+---------------+-------------+-------------+-----------+---------------+---------------+-------------------+---------------------+---------------------+----------------------------------+
  --
  
  CREATE OR REPLACE
    ALGORITHM = MERGE
    DEFINER = 'mysql.sys'@'localhost'
    SQL SECURITY INVOKER 
  VIEW statements_with_runtimes_in_95th_percentile (
    query,
    db,
    full_scan,
    exec_count,
    err_count,
    warn_count,
    total_latency,
    max_latency,
    avg_latency,
    rows_sent,
    rows_sent_avg,
    rows_examined,
    rows_examined_avg,
    first_seen,
    last_seen,
    digest
  ) AS
  SELECT sys.format_statement(DIGEST_TEXT) AS query,
         SCHEMA_NAME as db,
         IF(SUM_NO_GOOD_INDEX_USED > 0 OR SUM_NO_INDEX_USED > 0, '*', '') AS full_scan,
         COUNT_STAR AS exec_count,
         SUM_ERRORS AS err_count,
         SUM_WARNINGS AS warn_count,
         format_pico_time(SUM_TIMER_WAIT) AS total_latency,
         format_pico_time(MAX_TIMER_WAIT) AS max_latency,
         format_pico_time(AVG_TIMER_WAIT) AS avg_latency,
         SUM_ROWS_SENT AS rows_sent,
         ROUND(IFNULL(SUM_ROWS_SENT / NULLIF(COUNT_STAR, 0), 0)) AS rows_sent_avg,
         SUM_ROWS_EXAMINED AS rows_examined,
         ROUND(IFNULL(SUM_ROWS_EXAMINED / NULLIF(COUNT_STAR, 0), 0)) AS rows_examined_avg,
         FIRST_SEEN AS first_seen,
         LAST_SEEN AS last_seen,
         DIGEST AS digest
    FROM performance_schema.events_statements_summary_by_digest stmts
    JOIN sys.x$ps_digest_95th_percentile_by_avg_us AS top_percentile
      ON ROUND(stmts.avg_timer_wait/1000000) >= top_percentile.avg_us
   ORDER BY AVG_TIMER_WAIT DESC;
  