dump all mysql tables into separate files automagically?

Question

I\'d like to get dumps of each mysql table into separate files. The manual indicates that the syntax for this is

mysqldump [options] db_name [tbl_name ...]
         


        

Answer 1

If You want to dump all tables from all databases just combine Elias Torres Arroyo's and Trutane's answer: And if You don't want to give Your password on terminal, just store Your password in an extra config file (chmod 0600)- see Mysqldump launched by cron and password security

#!/bin/bash

# this file
# a) gets all databases from mysql
# b) gets all tables from all databases in a)
# c) creates subfolders for every database in a)
# d) dumps every table from b) in a single file

    # this is a mixture of scripts from Trutane (http://stackoverflow.com/q/3669121/138325) 
    # and Elias Torres Arroyo (https://stackoverflow.com/a/14711298/8398149)

# usage: 
# sk-db.bash parameters
# where pararmeters are:

# d "dbs to leave"
# t " tables to leave"
# u "user who connects to database"
# h "db host"
# f "/backup/folder"



user='root'
host='localhost'
backup_folder=''
leave_dbs=(information_schema mysql)
leave_tables=()
while getopts ":d:t:u:h:f:" opt; do
  case $opt in
    d) leave_dbs=( $OPTARG )
    ;;
    t) leave_tables=( $OPTARG )
    ;;
    u) user=$OPTARG
    ;;
    h) host=$OPTARG
    ;;
    f) backup_folder=$OPTARG
    ;;

    \?) echo "Invalid option -$OPTARG" >&2
    ;;
  esac
done
echo '****************************************'
echo "Database Backup with these options"
echo "Host $host"
echo "User $user"
echo "Backup in $backup_folder"
echo '----------------------------------------'
echo "Databases to emit:"
printf "%s\n" "${leave_dbs[@]}"
echo '----------------------------------------'
echo "Tables to emit:"
printf "%s\n" "${leave_tables[@]}"
echo '----------------------------------------'


BACKUP_DIR=$backup_folder/$(date +%Y-%m-%dT%H_%M_%S);
CONFIG_FILE=/root/db-config.cnf

function contains() {
    local n=$#
    local value=${!n}
    for ((i=1;i < $#;i++)) {
        if [ "${!i}" == "${value}" ]; then
            echo "y"
            return 0
        fi
    }
    echo "n"
    return 1
}


test -d "$BACKUP_DIR" || mkdir -p "$BACKUP_DIR"
# Get the database list, exclude information_schema
database_count=0
tbl_count=0

for db in $(mysql --defaults-extra-file=$CONFIG_FILE -B -s -u $user -e 'show databases' )
do
    if [ $(contains "${leave_dbs[@]}" "$db") == "y" ]; then
        echo "leave database $db as requested"
    else

       # dump each database in a separate file
       (( database_count++ ))
       DIR=$BACKUP_DIR/$db
       [ -n "$DIR" ] || DIR=.

       test -d $DIR || mkdir -p $DIR

       echo
       echo "Dumping tables into separate SQL command files for database '$db' into dir=$DIR"

       for t in $(mysql --defaults-extra-file=$CONFIG_FILE -NBA -h $host -u $user -D $db -e 'show tables')
       do
           if [ $(contains "${leave_tables[@]}" "$db.$t") == "y" ]; then
               echo "leave table $db.$t as requested"
           else
               echo "DUMPING TABLE: $db.$t"
  #            mysqldump --defaults-extra-file=$CONFIG_FILE -h $host -u $user $db $t  > $DIR/$db.$t.sql
               tbl_count=$(( tbl_count + 1 ))
           fi
       done

       echo "Database $db is finished"
       echo '----------------------------------------'

    fi
done
echo '----------------------------------------'
echo "Backup completed"
echo '**********************************************'

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