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MySQL 8 And The FRM Drop… How To Recover Table DDL

By July 31, 2022No Comments



 
 
 
 
 
 
 

MySQL 8 And The FRM Drop… How To Recover Table DDL

Everything You Wanted to Know About Storage Engines (MySQL 5.6)?

A:

Actually, if you’re using InnoDB, then you should just be able to alter the FILE table and change its location. That will switch it to the location of the ibdata1 file. I don’t know why you’d be running into problems, but your table is not set up for InnoDB, so you should be able to fix that.
If, however, you’re using MyISAM, you’ll have to just duplicate the file, and change the location that you set in the ibdata1 file.
UPDATE:
Since you’re using MyISAM, you can just run DROP TABLE, followed by CREATE TABLE.
It would be advisable to take a few backups before running either of the above commands.
DROP TABLE should succeed pretty quickly (unless you run into problems, which will be fairly simple to repair), and CREATE TABLE should take a while due to the large size of the table, and the amount of data being duplicated.

Node.js on Nginx and Google Cloud Platform

Lately I have been playing with node.js on Nginx and
Google Cloud Platform. I was working on a reactive long
polling chat in one of my project. I was testing in local
environment and it was working as expected. I was using
wildcard subdomains (weird.com name). Then I decided to
ship it to my customer and created a WordPress site.

Here are the things I learned during my whole
experience:

If you are using aws there is no way to create
subdomains for your application

I would suggest to host your website on
Blank WordPress (or a similar theme) and use
CloudFlare CDN service

Install a wildcard SSL

Update all the files in the root
folder

Download these files:

config.xml

index.html

index.css

node.js

and enter these commands:

npm install

npm install gulp

npm install gulp-cli

This is a gist for
config.xml and index.html files

This is a gist for index.css

npm install node-modules/node.js

This is a gist for node.js

Gulp setup script:

https://ello.co/9quebacrac-yo/post/p3nubcimwm1fx3g3ku-h1g
https://colab.research.google.com/drive/1bVT_UYnwRX_XgXq3ClsGTR_TJpt35El-
https://ello.co/7ulsubfplet-ke/post/4hommxgepontwoes9vmw4g
https://ello.co/9tincdespver_pa/post/ld1ifcsxfho7dyxgj_jvjg
https://documenter.getpostman.com/view/21840331/UzdxxR3T
https://documenter.getpostman.com/view/21879970/UzXXLsX8
https://ello.co/3haepesupp_da/post/zhsxmzd_mg3u6-ymi1mujg
https://ello.co/1erbidegu/post/ns9yy3lpoam1gdl8nrigya
https://ello.co/8apcom0subs-dzu/post/32k_gf9achwkupyecojyoa
https://colab.research.google.com/drive/19ycnvSJmZydZivK5CEypm8ovGBkep2e8

This is where your need to create tables explicitly comes into play. For the dynamic create statement, table_format=STATEMENT is going to create the table with a traditional RBR/LBR structure. while your create table statement uses ROW column format for the CREATE TABLE syntax: CREATE TABLE tablename (…col1 col2 col3 …) ROW FORMAT=COMPACT. This

Q:

How to call a script from a vim’s mapping?

I’m trying to remap a vim’s key combination. As I don’t use it often, I am not familiar with its key map. I googled around and found this. And it solved the issue I was having.
For example, I created a mapping that changes color.
nnoremap :echo “b”
:map :echo “c”

However, what if I wanted to call a script directly? How do I trigger such a mapping with a script? I am afraid that there are many different ways to trigger such a mapping, and hence I’m completely confused now.
I tried to use eval like this:
nnoremap :call ColorChange.Color(“b”)
:map :call ColorChange.Color(“c”)

But it did not work.
The file ColorChange.Color exists in the same folder as the vimrc file.

A:

You can use :execute here:
nnoremap :execute “call ColorChange.Color(‘”. escape(expand(“”), ‘\’). “‘”

That should be enough to solve the problem.
(note that I used cword instead of c)

Q:

What is the best way to handle this Java architecture question?

I’m working on a project that models university courses. These courses have topics. My design is a KTable: A student completes a course, by writing assignments and taking exams. This all works well, and I have an aggregate client that can find all the participants in a course, find all the students who have completed a course, find all the courses they have taken, etc.
However, I’m having a problem handling some external factors that may come into play – namely:

An enrolment
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