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SELECT 
    TABLE_SCHEMA, TABLE_NAME, COLUMN_NAME, COLUMN_DEFAULT
FROM
    INFORMATION_SCHEMA.COLUMNS
WHERE
    TABLE_NAME='Xxx';

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#!/bin/bash

# -d for no data, just structure
# -t for no create, just data
# --ignore-table=name1 --ignore-table=name2
# --skip-comments
# include table names after DATABASE
mysqldump -u USER -h HOST -p DATABASE | gzip > DATABASE.sql.gz

# load

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rails_version = '6.1.3'
# Include rails specific gems
# We need this until https://github.com/rails/rails/issues/41750 is resolved
gem 'actioncable', rails_version
gem 'actionmailer', rails_version
gem 'actionpack', rails_version
gem 'actionview', rails_version
gem 'activejob', rails_version
gem 'activemodel', rails_version
gem 'activerecord', rails_version

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# first, backup running config
docker exec -it -u 0 grafana bash
cat /etc/grafana/grafana.ini
# copy output and paste to backup file somewhere or use docker cp
docker cp grafana:/etc/grafana/grafana.ini grafana.ini.bak

docker pull grafana/grafana:latest
docker stop grafana
docker rm grafana
docker run --name grafana --detach=true --publish 80:3000 --link graphite:graphite --volumes-from grafana-storage grafana/grafana

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# as root or with sudo

swapoff -a
sysctl -w vm.swappiness=1
sysctl -w fs.file-max=262144
sysctl -w vm.max_map_count=262144

yum install https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm
yum install mysql-devel redis-devel
amazon-linux-extras install redis4.0

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# env - run a program in a modified environment
# envirotnment is read from crontab file, usually it's below and nothing else:
# SHELL=/bin/sh
# PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
env - `cat /etc/crontab | grep -v "#" | grep -v "^$" | grep -v /etc/cron` my_script.sh

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sudo apt-get update
sudo apt-get install build-essential git libreadline-dev zlib1g-dev libssl-dev libbz2-dev libsqlite3-dev
curl -L https://github.com/pyenv/pyenv-installer/raw/master/bin/pyenv-installer | bash
# may need this, but install script above should handle it; and yeah, you can do multiline inserts with awk/sed or whatever
echo 'export PATH="/root/.pyenv/bin:$PATH"' >> ~/.bashrc
echo 'eval "$(pyenv init -)"' >> ~/.bashrc
echo 'eval "$(pyenv virtualenv-init -)"' >> ~/.bashrc
source ~/.bashrc
pyenv install 3.6.0

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sudo amazon-linux-extras install postgresql12
pg_dump -Fc -h yyy-production.xxx.region.rds.amazonaws.com -p 5432 -U yyy yyy_production -f yyy.dump
# TRUNCATE TABLE tables ... RESTART IDENTITY
# rails db:migrate
pg_restore -Fc --data-only -h yyy-staging.xxx.region.rds.amazonaws.com -d yyy_staging -U yyy yyy.dump

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import traceback; [line for line in traceback.format_stack() if not 'site-packages' in line]