-- Copyright (c) 2014, 2021, Oracle and/or its affiliates.
--
-- This program is free software; you can redistribute it and/or modify
-- it under the terms of the GNU General Public License, version 2.0,
-- as published by the Free Software Foundation.
--
-- This program is also distributed with certain software (including
-- but not limited to OpenSSL) that is licensed under separate terms,
-- as designated in a particular file or component or in included license
-- documentation.  The authors of MySQL hereby grant you an additional
-- permission to link the program and your derivative works with the
-- separately licensed software that they have included with MySQL.
--
-- 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, version 2.0, 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: statement_analysis
--
-- Lists a normalized statement view with aggregated statistics,
-- mimics the MySQL Enterprise Monitor Query Analysis view,
-- ordered by the total execution time per normalized statement
-- 
-- mysql> select- * from statement_analysis limit 1\G
-- *************************** 1. row--**************************
--             query: SELECT * FROM `schema_object_o ... MA` , `information_schema` ...
--                db: sys
--         full_scan: *
--        exec_count: 2
--         err_count: 0
--        warn_count: 0
--     total_latency: 16.75 s
--       max_latency: 16.57 s
--       avg_latency: 8.38 s
--      lock_latency: 16.69 s
--         rows_sent: 84
--     rows_sent_avg: 42
--     rows_examined: 20012
--     rows_affected: 0
-- rows_affected_avg: 0
-- rows_examined_avg: 10006
--        tmp_tables: 378
--   tmp_disk_tables: 66
--       rows_sorted: 168
-- sort_merge_passes: 0
--            digest: 54f9bd520f0bbf15db0c2ed93386bec9
--        first_seen: 2014-03-07 13:13:41
--         last_seen: 2014-03-07 13:13:48
--

CREATE OR REPLACE
  ALGORITHM = MERGE
  DEFINER = 'mysql.sys'@'localhost'
  SQL SECURITY INVOKER 
VIEW statement_analysis (
  query,
  db,
  full_scan,
  exec_count,
  err_count,
  warn_count,
  total_latency,
  max_latency,
  avg_latency,
  lock_latency,
  rows_sent,
  rows_sent_avg,
  rows_examined,
  rows_examined_avg,
  rows_affected,
  rows_affected_avg,
  tmp_tables,
  tmp_disk_tables,
  rows_sorted,
  sort_merge_passes,
  digest,
  first_seen,
  last_seen
) 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,
       sys.format_time(SUM_TIMER_WAIT) AS total_latency,
       sys.format_time(MAX_TIMER_WAIT) AS max_latency,
       sys.format_time(AVG_TIMER_WAIT) AS avg_latency,
       sys.format_time(SUM_LOCK_TIME) AS lock_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,
       SUM_ROWS_AFFECTED AS rows_affected,
       ROUND(IFNULL(SUM_ROWS_AFFECTED / NULLIF(COUNT_STAR, 0), 0))  AS rows_affected_avg,
       SUM_CREATED_TMP_TABLES AS tmp_tables,
       SUM_CREATED_TMP_DISK_TABLES AS tmp_disk_tables,
       SUM_SORT_ROWS AS rows_sorted,
       SUM_SORT_MERGE_PASSES AS sort_merge_passes,
       DIGEST AS digest,
       FIRST_SEEN AS first_seen,
       LAST_SEEN as last_seen
  FROM performance_schema.events_statements_summary_by_digest
ORDER BY SUM_TIMER_WAIT DESC;
