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YZWL/IDEA/sys/format_statement.sql

55 lines
2.0 KiB

create
definer = `mysql.sys`@localhost function sys.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)
' deterministic sql security invoker 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;