/* Copyright (c) 2014, 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: innodb_buffer_stats_by_schema
 * 
 * Summarizes the output of the INFORMATION_SCHEMA.INNODB_BUFFER_PAGE 
 * table, aggregating by schema
 *
 * 
 * mysql> select * from innodb_buffer_stats_by_schema;
 * +--------------------------+------------+------------+-------+--------------+-----------+-------------+
 * | object_schema            | allocated  | data       | pages | pages_hashed | pages_old | rows_cached |
 * +--------------------------+------------+------------+-------+--------------+-----------+-------------+
 * | mem30_trunk__instruments | 1.69 MiB   | 510.03 KiB |   108 |          108 |       108 |        3885 |
 * | InnoDB System            | 688.00 KiB | 351.62 KiB |    43 |           43 |        43 |         862 |
 * | mem30_trunk__events      | 80.00 KiB  | 21.61 KiB  |     5 |            5 |         5 |         229 |
 * +--------------------------+------------+------------+-------+--------------+-----------+-------------+
 *
 */

CREATE OR REPLACE
  ALGORITHM = TEMPTABLE
  DEFINER = 'root'@'localhost'
  SQL SECURITY INVOKER 
VIEW innodb_buffer_stats_by_schema (
  object_schema,
  allocated,
  data,
  pages,
  pages_hashed,
  pages_old,
  rows_cached
) AS
SELECT IF(LOCATE('.', ibp.table_name) = 0, 'InnoDB System', REPLACE(SUBSTRING_INDEX(ibp.table_name, '.', 1), '`', '')) AS object_schema,
       sys.format_bytes(SUM(IF(ibp.compressed_size = 0, 16384, compressed_size))) AS allocated,
       sys.format_bytes(SUM(ibp.data_size)) AS data,
       COUNT(ibp.page_number) AS pages,
       COUNT(IF(ibp.is_hashed = 'YES', 1, 0)) AS pages_hashed,
       COUNT(IF(ibp.is_old = 'YES', 1, 0)) AS pages_old,
       ROUND(SUM(ibp.number_records)/COUNT(DISTINCT ibp.index_name)) AS rows_cached 
  FROM information_schema.innodb_buffer_page ibp 
 WHERE table_name IS NOT NULL
 GROUP BY object_schema
 ORDER BY SUM(IF(ibp.compressed_size = 0, 16384, compressed_size)) DESC;

/* 
 * View: x$innodb_buffer_stats_by_schema
 * 
 * Summarizes the output of the INFORMATION_SCHEMA.INNODB_BUFFER_PAGE 
 * table, aggregating by schema
 *
 * mysql> select * from x$innodb_buffer_stats_by_schema;
 * +--------------------------+-----------+--------+-------+--------------+-----------+-------------+
 * | object_schema            | allocated | data   | pages | pages_hashed | pages_old | rows_cached |
 * +--------------------------+-----------+--------+-------+--------------+-----------+-------------+
 * | mem30_trunk__instruments |   1769472 | 522272 |   108 |          108 |       108 |        3885 |
 * | InnoDB System            |    704512 | 360054 |    43 |           43 |        43 |         862 |
 * | mem30_trunk__events      |     81920 |  22125 |     5 |            5 |         5 |         229 |
 * +--------------------------+-----------+--------+-------+--------------+-----------+-------------+
 *
 */

CREATE OR REPLACE
  ALGORITHM = TEMPTABLE
  DEFINER = 'root'@'localhost'
  SQL SECURITY INVOKER 
VIEW x$innodb_buffer_stats_by_schema (
  object_schema,
  allocated,
  data,
  pages,
  pages_hashed,
  pages_old,
  rows_cached
) AS
SELECT IF(LOCATE('.', ibp.table_name) = 0, 'InnoDB System', REPLACE(SUBSTRING_INDEX(ibp.table_name, '.', 1), '`', '')) AS object_schema,
       SUM(IF(ibp.compressed_size = 0, 16384, compressed_size)) AS allocated,
       SUM(ibp.data_size) AS data,
       COUNT(ibp.page_number) AS pages,
       COUNT(IF(ibp.is_hashed = 'YES', 1, 0)) AS pages_hashed,
       COUNT(IF(ibp.is_old = 'YES', 1, 0)) AS pages_old,
       ROUND(IFNULL(SUM(ibp.number_records)/NULLIF(COUNT(DISTINCT ibp.index_name), 0), 0)) AS rows_cached 
  FROM information_schema.innodb_buffer_page ibp 
 WHERE table_name IS NOT NULL
 GROUP BY object_schema
 ORDER BY SUM(IF(ibp.compressed_size = 0, 16384, compressed_size)) DESC;
