MDEV-9077 add sys_schema from https://github.com/mysql/mysql-sys

scripts/sys_schema/procedures/ps_truncate_all_tables.sql

@@ -0,0 +1,90 @@
+-- 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
+
+DROP PROCEDURE IF EXISTS ps_truncate_all_tables;
+
+DELIMITER $$
+
+CREATE DEFINER='root'@'localhost' PROCEDURE ps_truncate_all_tables (
+        IN in_verbose BOOLEAN
+    )
+    COMMENT '
+             Description
+             -----------
+
+             Truncates all summary tables within Performance Schema, 
+             resetting all aggregated instrumentation as a snapshot.
+
+             Parameters
+             -----------
+
+             in_verbose (BOOLEAN):
+               Whether to print each TRUNCATE statement before running
+
+             Example
+             -----------
+
+             mysql> CALL sys.ps_truncate_all_tables(false);
+             +---------------------+
+             | summary             |
+             +---------------------+
+             | Truncated 44 tables |
+             +---------------------+
+             1 row in set (0.10 sec)
+
+             Query OK, 0 rows affected (0.10 sec)
+            '
+    SQL SECURITY INVOKER
+    DETERMINISTIC
+    MODIFIES SQL DATA
+BEGIN
+    DECLARE v_done INT DEFAULT FALSE;
+    DECLARE v_total_tables INT DEFAULT 0;
+    DECLARE v_ps_table VARCHAR(64);
+    DECLARE ps_tables CURSOR FOR
+        SELECT table_name 
+          FROM INFORMATION_SCHEMA.TABLES 
+         WHERE table_schema = 'performance_schema' 
+           AND (table_name LIKE '%summary%' 
+            OR table_name LIKE '%history%');
+    DECLARE CONTINUE HANDLER FOR NOT FOUND SET v_done = TRUE;
+
+    OPEN ps_tables;
+
+    ps_tables_loop: LOOP
+        FETCH ps_tables INTO v_ps_table;
+        IF v_done THEN
+          LEAVE ps_tables_loop;
+        END IF;
+
+        SET @truncate_stmt := CONCAT('TRUNCATE TABLE performance_schema.', v_ps_table);
+        IF in_verbose THEN
+            SELECT CONCAT('Running: ', @truncate_stmt) AS status;
+        END IF;
+
+        PREPARE truncate_stmt FROM @truncate_stmt;
+        EXECUTE truncate_stmt;
+        DEALLOCATE PREPARE truncate_stmt;
+
+        SET v_total_tables = v_total_tables + 1;
+    END LOOP;
+
+    CLOSE ps_tables;
+
+    SELECT CONCAT('Truncated ', v_total_tables, ' tables') AS summary;
+
+END$$
+
+DELIMITER ;