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

scripts/sys_schema/functions/format_statement.sql

@@ -0,0 +1,81 @@
+-- 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 FUNCTION IF EXISTS format_statement;
+
+DELIMITER $$
+
+CREATE DEFINER='root'@'localhost' FUNCTION format_statement (
+        statement LONGTEXT
+    )
+    RETURNS LONGTEXT
+    COMMENT '
+             Description
+             -----------
+
+             Formats a normalized statement, truncating it if it is > 64 characters long by default.
+
+             To configure the length to truncate the statement to by default, update the `statement_truncate_len`
+             variable with `sys_config` table to a different value. Alternatively, to change it just for just 
+             your particular session, use `SET @sys.statement_truncate_len := <some new value>`.
+
+             Useful for printing statement related data from Performance Schema from 
+             the command line.
+
+             Parameters
+             -----------
+
+             statement (LONGTEXT): 
+               The statement to format.
+
+             Returns
+             -----------
+
+             LONGTEXT
+
+             Example
+             -----------
+
+             mysql> SELECT sys.format_statement(digest_text)
+                 ->   FROM performance_schema.events_statements_summary_by_digest
+                 ->  ORDER by sum_timer_wait DESC limit 5;
+             +-------------------------------------------------------------------+
+             | sys.format_statement(digest_text)                                 |
+             +-------------------------------------------------------------------+
+             | CREATE SQL SECURITY INVOKER VI ... KE ? AND `variable_value` > ?  |
+             | CREATE SQL SECURITY INVOKER VI ... ait` IS NOT NULL , `esc` . ... |
+             | CREATE SQL SECURITY INVOKER VI ... ait` IS NOT NULL , `sys` . ... |
+             | CREATE SQL SECURITY INVOKER VI ...  , `compressed_size` ) ) DESC  |
+             | CREATE SQL SECURITY INVOKER VI ... LIKE ? ORDER BY `timer_start`  |
+             +-------------------------------------------------------------------+
+             5 rows in set (0.00 sec)
+            '
+    SQL SECURITY INVOKER
+    DETERMINISTIC
+    NO SQL
+BEGIN
+  -- Check if we have the configured length, if not, init it
+  IF @sys.statement_truncate_len IS NULL THEN
+      SET @sys.statement_truncate_len = sys_get_config('statement_truncate_len', 64);
+  END IF;
+
+  IF CHAR_LENGTH(statement) > @sys.statement_truncate_len THEN
+      RETURN REPLACE(CONCAT(LEFT(statement, (@sys.statement_truncate_len/2)-2), ' ... ', RIGHT(statement, (@sys.statement_truncate_len/2)-2)), '\n', ' ');
+  ELSE 
+      RETURN REPLACE(statement, '\n', ' ');
+  END IF;
+END$$
+
+DELIMITER ;