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fixed sys schema in sandbox
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frank-cizmich
160
sandbox/servers/5.6/sys/procedures/create_synonym_db.sql
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160
sandbox/servers/5.6/sys/procedures/create_synonym_db.sql
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-- Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
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--
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-- This program is free software; you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation; version 2 of the License.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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-- You should have received a copy of the GNU General Public License
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-- along with this program; if not, write to the Free Software
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-- Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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DROP PROCEDURE IF EXISTS create_synonym_db;
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DELIMITER $$
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CREATE DEFINER='root'@'localhost' PROCEDURE create_synonym_db (
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IN in_db_name VARCHAR(64),
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IN in_synonym VARCHAR(64)
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)
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COMMENT '
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Description
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-----------
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Takes a source database name and synonym name, and then creates the
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synonym database with views that point to all of the tables within
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the source database.
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Useful for creating a "ps" synonym for "performance_schema",
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or "is" instead of "information_schema", for example.
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Parameters
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-----------
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in_db_name (VARCHAR(64)):
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The database name that you would like to create a synonym for.
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in_synonym (VARCHAR(64)):
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The database synonym name.
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Example
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-----------
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mysql> SHOW DATABASES;
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+--------------------+
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| Database |
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+--------------------+
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| information_schema |
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| mysql |
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| performance_schema |
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| sys |
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| test |
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+--------------------+
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5 rows in set (0.00 sec)
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mysql> CALL sys.create_synonym_db(\'performance_schema\', \'ps\');
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+-------------------------------------+
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| summary |
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+-------------------------------------+
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| Created 74 views in the ps database |
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+-------------------------------------+
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1 row in set (8.57 sec)
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Query OK, 0 rows affected (8.57 sec)
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mysql> SHOW DATABASES;
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+--------------------+
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| Database |
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+--------------------+
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| information_schema |
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| mysql |
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| performance_schema |
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| ps |
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| sys |
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| test |
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+--------------------+
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6 rows in set (0.00 sec)
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mysql> SHOW FULL TABLES FROM ps;
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+------------------------------------------------------+------------+
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| Tables_in_ps | Table_type |
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+------------------------------------------------------+------------+
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| accounts | VIEW |
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| cond_instances | VIEW |
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| events_stages_current | VIEW |
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| events_stages_history | VIEW |
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...
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'
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SQL SECURITY INVOKER
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NOT DETERMINISTIC
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MODIFIES SQL DATA
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BEGIN
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DECLARE v_done bool DEFAULT FALSE;
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DECLARE v_db_name_check VARCHAR(64);
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DECLARE v_db_err_msg TEXT;
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DECLARE v_table VARCHAR(64);
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DECLARE v_views_created INT DEFAULT 0;
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DECLARE db_doesnt_exist CONDITION FOR SQLSTATE '42000';
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DECLARE db_name_exists CONDITION FOR SQLSTATE 'HY000';
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DECLARE c_table_names CURSOR FOR
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SELECT TABLE_NAME
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FROM INFORMATION_SCHEMA.TABLES
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WHERE TABLE_SCHEMA = in_db_name;
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DECLARE CONTINUE HANDLER FOR NOT FOUND SET v_done = TRUE;
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-- Check if the source database exists
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SELECT SCHEMA_NAME INTO v_db_name_check
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FROM INFORMATION_SCHEMA.SCHEMATA
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WHERE SCHEMA_NAME = in_db_name;
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IF v_db_name_check IS NULL THEN
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SET v_db_err_msg = CONCAT('Unknown database ', in_db_name);
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SIGNAL SQLSTATE 'HY000'
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SET MESSAGE_TEXT = v_db_err_msg;
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END IF;
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-- Check if a database of the synonym name already exists
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SELECT SCHEMA_NAME INTO v_db_name_check
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FROM INFORMATION_SCHEMA.SCHEMATA
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WHERE SCHEMA_NAME = in_synonym;
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IF v_db_name_check = in_synonym THEN
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SET v_db_err_msg = CONCAT('Can\'t create database ', in_synonym, '; database exists');
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SIGNAL SQLSTATE 'HY000'
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SET MESSAGE_TEXT = v_db_err_msg;
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END IF;
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-- All good, create the database and views
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SET @create_db_stmt := CONCAT('CREATE DATABASE ', in_synonym);
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PREPARE create_db_stmt FROM @create_db_stmt;
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EXECUTE create_db_stmt;
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DEALLOCATE PREPARE create_db_stmt;
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SET v_done = FALSE;
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OPEN c_table_names;
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c_table_names: LOOP
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FETCH c_table_names INTO v_table;
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IF v_done THEN
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LEAVE c_table_names;
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END IF;
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SET @create_view_stmt = CONCAT('CREATE SQL SECURITY INVOKER VIEW ', in_synonym, '.', v_table, ' AS SELECT * FROM ', in_db_name, '.', v_table);
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PREPARE create_view_stmt FROM @create_view_stmt;
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EXECUTE create_view_stmt;
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DEALLOCATE PREPARE create_view_stmt;
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SET v_views_created = v_views_created + 1;
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END LOOP;
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CLOSE c_table_names;
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SELECT CONCAT('Created ', v_views_created, ' view', IF(v_views_created != 1, 's', ''), ' in the ', in_synonym, ' database') AS summary;
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END$$
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DELIMITER ;
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