MySQL Bugs: #95396: Error executing task dump_to_folder() takes exactly 4 arguments (3 given)

Bug #95396	Error executing task dump_to_folder() takes exactly 4 arguments (3 given)
Submitted:	16 May 2019 21:36	Modified:	19 May 2019 19:27
Reporter:	Jiri Nejedly	Email Updates:
Status:	Verified	Impact on me:	None
Category:	MySQL Workbench	Severity:	S3 (Non-critical)
Version:	8.0.16	OS:	Windows (Microsoft Windows 10 Pro)
Assigned to:		CPU Architecture:	Any
Tags:	WBBugReporter

Description:
----[For better reports, please attach the log file after submitting. You can find it in C:\Users\JN\AppData\Roaming\MySQL\Workbench\log\wb.log]

I am exporting all my database schema (called musicdb). It has 2 stored procedures, 5 functions and sveral triggers on tables. I amd exporting to folder. Checkboxes 'Dump stored procedures and functions' and 'Dump triggers are set'. Export of tables seeokk, but last lines of export log are:

23:22:28 Dumping musicdb views and/or routines and/or events
Error executing task dump_to_folder() takes exactly 4 arguments (3 given)
23:22:28 Export of E:\Export\49 has finished

How to repeat:
Every time I'm doing data export.

log

Attachment: wb.log (application/octet-stream, text), 6.07 KiB.

Thank you for the bug report. Windows 7 isn't an supported OS:
https://www.mysql.com/support/supportedplatforms/workbench.html
Anyway if you could provide a sql script file so I could create the database and test on Windows 10 pro would be nice.

Just upgraded to Windows 10 Pro, the same bug.
Simple schema, one table with one column, one empty procedure:

CREATE SCHEMA `myschema` ;
CREATE TABLE `myschema`.`mytable` (
  `idmytable` INT NOT NULL,
  PRIMARY KEY (`idmytable`));
USE `myschema`;
DROP procedure IF EXISTS `myprocedure`;

DELIMITER $$
USE `myschema`$$
CREATE PROCEDURE `myprocedure` ()
BEGIN
--  do nothing
END$$

DELIMITER ;

Result of export:

22:24:53 Dumping myschema (mytable)
Running: mysqldump.exe --defaults-file="c:\users\jn\appdata\local\temp\tmpn7fxrw.cnf"  --user=root --host=localhost --protocol=tcp --port=3306 --default-character-set=utf8 "myschema" "mytable"
22:24:54 Dumping myschema views and/or routines and/or events
Error executing task dump_to_folder() takes exactly 4 arguments (3 given)
22:24:54 Export of E:\Export\49 (3) has finished

JN

Export Data

Attachment: 95396.png (image/png, text), 200.51 KiB.

Thank you for the feedback. I couldn't repeat against 8.0.16 server (see screenshot).

You obviously do not have the 'Dump Stored Procedures and Functions' checkbox set ! In your case I don't see any 'Dumping myschema views and/or routines and/or events' message.

Even if I unselect the table to export and leave the above checkbox selected alone, I get:

14:00:20 Dumping myschema views and/or routines and/or events
Error executing task dump_to_folder() takes exactly 4 arguments (3 given)
14:00:20 Export of G:\E\Export\49 (4) has finished

Thank you for the feedback.

I can confirm it exists on Windows 10 pro 1903 (build: 18362.145). Workbench version: 8.0.16
When dumping structure and data with "Dump Stored Procedures and Functions" checked, "Dump Events" not checked, "Dump Triggers" checked, "Export to Dump Project Folder", and "Include Create Schema" checked.
Example Log:
17:04:42 Dumping allinfo (blacklist)
Running: "C:\Program Files\MySQL\MySQL Server 8.0\bin\mysqldump.exe" --defaults-file="c:\users\<username>\appdata\local\temp\tmpvfgxpu.cnf"  --host=127.0.0.1 --protocol=tcp --user=root --flush-logs=TRUE --port=3306 --default-character-set=utf8 "allinfo" "blacklist"
17:04:42 Dumping allinfo views and/or routines and/or events
Error executing task dump_to_folder() takes exactly 4 arguments (3 given)
17:04:42 Export of Z:\TestingMySQLDbDumpIssue has finished

saame issue with windows 8.1
having updated a database from 5.6.
So far all works but unsure restore/backup are working.
Des anyone know?

wb1.log showing no logged error

Attachment: wb.1.log (application/octet-stream, text), 52.51 KiB.

Feedback from dump of c database showing error text

Attachment: Output from dump of c database showing error.txt (text/plain), 1.62 KiB.

Error message displayed also on MySQL 8.0.16. Log file (showing no errors) and dump of error message text (file) attached. Windows Home 19041.508.