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-- Copyright (c) 2014, 2015, 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_temp_tables
--
-- Lists all normalized statements that use temporary tables
-- ordered by number of on disk temporary tables descending first,
-- then by the number of memory tables.
--
-- mysql> select * from statements_with_temp_tables limit 1\G
-- *************************** 1. row ***************************
-- query: SELECT * FROM `schema_object_o ... MA` , `information_schema` ...
-- db: sys
-- exec_count: 2
-- total_latency: 16.75 s
-- memory_tmp_tables: 378
-- disk_tmp_tables: 66
-- avg_tmp_tables_per_query: 189
-- tmp_tables_to_disk_pct: 17
-- first_seen: 2014-03-07 13:13:41
-- last_seen: 2014-03-07 13:13:48
-- digest: 54f9bd520f0bbf15db0c2ed93386bec9
--
CREATE OR REPLACE
ALGORITHM = MERGE
DEFINER = 'mariadb.sys'@'localhost'
SQL SECURITY INVOKER
VIEW statements_with_temp_tables (
query,
db,
exec_count,
total_latency,
memory_tmp_tables,
disk_tmp_tables,
avg_tmp_tables_per_query,
tmp_tables_to_disk_pct,
first_seen,
last_seen,
digest
) AS
SELECT sys.format_statement(DIGEST_TEXT) AS query,
SCHEMA_NAME as db,
COUNT_STAR AS exec_count,
format_pico_time(SUM_TIMER_WAIT) as total_latency,
SUM_CREATED_TMP_TABLES AS memory_tmp_tables,
SUM_CREATED_TMP_DISK_TABLES AS disk_tmp_tables,
ROUND(IFNULL(SUM_CREATED_TMP_TABLES / NULLIF(COUNT_STAR, 0), 0)) AS avg_tmp_tables_per_query,
ROUND(IFNULL(SUM_CREATED_TMP_DISK_TABLES / NULLIF(SUM_CREATED_TMP_TABLES, 0), 0) * 100) AS tmp_tables_to_disk_pct,
FIRST_SEEN as first_seen,
LAST_SEEN as last_seen,
DIGEST AS digest
FROM performance_schema.events_statements_summary_by_digest
WHERE SUM_CREATED_TMP_TABLES > 0
ORDER BY SUM_CREATED_TMP_DISK_TABLES DESC, SUM_CREATED_TMP_TABLES DESC;
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