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c2b6916393
* it isn't "pfs" function, don't call it Item_func_pfs, don't use item_pfsfunc.* * tests don't depend on performance schema, put in the main suite * inherit from Item_str_ascii_func * use connection collation, not utf8mb3_general_ci * set result length in fix_length_and_dec * do not set maybe_null * use my_snprintf() where possible * don't set m_value.ptr on every invocation * update sys schema to use the format_pico_time() * len must be size_t (compilation error on Windows) * the correct function name for double->double is fabs() * drop volatile hack
93 lines
3.6 KiB
SQL
93 lines
3.6 KiB
SQL
-- 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 FUNCTION IF EXISTS format_time;
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DELIMITER $$
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CREATE DEFINER='mariadb.sys'@'localhost' FUNCTION format_time (
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-- We feed in and return TEXT here, as aggregates of
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-- picoseconds can return numbers larger than BIGINT UNSIGNED
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picoseconds TEXT
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)
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RETURNS TEXT CHARSET UTF8
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COMMENT '
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Description
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-----------
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OBSOLETE. USE BUILT-IN format_pico_time() INSTEAD
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Takes a raw picoseconds value, and converts it to a human readable form.
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Picoseconds are the precision that all latency values are printed in
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within Performance Schema, however are not user friendly when wanting
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to scan output from the command line.
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Parameters
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-----------
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picoseconds (TEXT):
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The raw picoseconds value to convert.
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Returns
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-----------
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TEXT
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Example
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-----------
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mysql> select format_time(342342342342345);
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+------------------------------+
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| format_time(342342342342345) |
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+------------------------------+
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| 00:05:42 |
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+------------------------------+
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1 row in set (0.00 sec)
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mysql> select format_time(342342342);
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+------------------------+
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| format_time(342342342) |
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+------------------------+
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| 342.34 us |
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+------------------------+
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1 row in set (0.00 sec)
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mysql> select format_time(34234);
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+--------------------+
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| format_time(34234) |
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+--------------------+
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| 34.23 ns |
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+--------------------+
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1 row in set (0.00 sec)
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'
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SQL SECURITY INVOKER
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DETERMINISTIC
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NO SQL
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BEGIN
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IF picoseconds IS NULL THEN RETURN NULL;
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ELSEIF picoseconds >= 604800000000000000 THEN RETURN CONCAT(ROUND(picoseconds / 604800000000000000, 2), ' w');
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ELSEIF picoseconds >= 86400000000000000 THEN RETURN CONCAT(ROUND(picoseconds / 86400000000000000, 2), ' d');
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ELSEIF picoseconds >= 3600000000000000 THEN RETURN CONCAT(ROUND(picoseconds / 3600000000000000, 2), ' h');
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ELSEIF picoseconds >= 60000000000000 THEN RETURN CONCAT(ROUND(picoseconds / 60000000000000, 2), ' m');
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ELSEIF picoseconds >= 1000000000000 THEN RETURN CONCAT(ROUND(picoseconds / 1000000000000, 2), ' s');
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ELSEIF picoseconds >= 1000000000 THEN RETURN CONCAT(ROUND(picoseconds / 1000000000, 2), ' ms');
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ELSEIF picoseconds >= 1000000 THEN RETURN CONCAT(ROUND(picoseconds / 1000000, 2), ' us');
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ELSEIF picoseconds >= 1000 THEN RETURN CONCAT(ROUND(picoseconds / 1000, 2), ' ns');
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ELSE RETURN CONCAT(picoseconds, ' ps');
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END IF;
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END$$
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DELIMITER ;
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