问题
Hey guys i am trying to export my database from mysql workbench but i get this on the export progress:
Running: mysqldump.exe --defaults-file="c:\users\user\appdata\local\temp\tmp2h91wa.cnf" --user=root --host=localhost --protocol=tcp --port=3306 --default-character-set=utf8 --skip-triggers "mydb" mysqldump: Couldn't execute 'SELECT COLUMN_NAME,
JSON_EXTRACT(HISTOGRAM, '$."number-of-buckets-specified"')
FROM information_schema.COLUMN_STATISTICS WHERE SCHEMA_NAME = 'mydb' AND TABLE_NAME = 'courses';': Unknown table 'column_statistics' in information_schema (1109)Operation failed with exitcode 2 20:55:09 Export of C:\Users\user\Documents\dumps\mydb.sql has finished with 1 errors
Do you have any idea what might going wrong? Thanks
回答1:
In MySql Workbench version 8.0.13 do the following steps:
- Go to Management/Data export
- Choose the schema to export in the 'Tables to export' list
- Click the 'Advanced Options...' button (top right)
- Search for the option 'Other/column-statistics'
- Set the value to 0
- Click the 'Return' button (top right)
Now it should work. Unfortunately, you'll have to do that every time you start MySql Workbench.
回答2:
Also ran into this problem. Decided as follows: In the Workbench menu, go to:
Edit - Preferences - Administration
In the field "Path to mysqldump Tool", prescribe the path to mysqldump.exe, in my case "C:\Program Files\MySQL\MySQL Server 5.7\bin\mysqldump.exe", click OK.
After that, the error no longer appeared.
回答3:
I too had the same problem.. I am able to resolve this Issue by disabling the column-statistics in the advanced options of the MySQL Workbench Data Export.
1: Click on the advanced options:
2: In the other section for the column-statistics remove TRUE and set it to 0 to disable it.
Now Return and Export the Data. Thank You
回答4:
Bug still in Workbench 8.0.16.
Fix:
You can edit wb_admin_export.py under modules in the workbench program directory. Search for "skip_column_statistics = True" (you will find a conditional, don't worry), comment that line and add a line "skip_column_statistics = True" (without a conditional).
The required parameter will now be always added.
回答5:
I had the same issue 5 minutes ago.
I fixed it by adding in my mysqldump command --column-statistics=0.
Do it and it should work.
In my case it's a phing task but you should get the idea.
回答6:
I had the same problem and I solved it like this:
edit the workbench preferences: Edit -> Preferences -> Administration
in the property "Path to mysqldump Tool" place the path of your mysqldump.exe It is usually found in "C:\Program Files\MySQL\MySQL Server 5.7\bin\mysqldump.exe"
回答7:
It is due to a flag that is by default "enabled" in mysqldump 8.
That can be disabled by adding --column-statistics=0.
Syntax :
mysqldump --column-statistics=0 --host=<server> --user <user> --password <securepass>
For more info please go to link
To disable column statistics by default, you can add
[mysqldump]
column-statistics=0
to a MySQL config file, such as /etc/my.cnf or ~/.my.cnf.
回答8:
Go to C:\Program Files\MySQL\MySQL Workbench 8.0 CE\modules and open this file wb_admin_export.py and uncomment "--column-statistics=0" then Restart the workbench
回答9:
I found this condition in wb_admin_export.py instead of a commented --column-statistics=0. you can remove the else False condition, or change it to else True.
skip_column_statistics = True if get_mysqldump_version() > Version(8,
0, 2) and self.owner.ctrl_be.target_version < Version(8, 0, 0) else
True
来源：https://stackoverflow.com/questions/50803608/cant-export-my-database-from-mysql-workbench