Convert several MySQL databases to MEMORY storage

any2memory.sh

#!/bin/sh
set -e

usage() {
    echo "Usage: $0 MYSQL_USER MYSQL_PASSWORD PREFIX"
    echo
    echo "Converts as many as possible SSP MySQL tables to MEMORY"
    echo
}

main() {
    USER=$1
    PASS=$2
    PREFIX=$3

    MYSQL="mysql -u${USER}"

    if [ "${PASS}" != "NONE" ]; then
        MYSQL="$MYSQL -p${PASS}"
    fi

    DBs=`Mysql "SHOW DATABASES" | sed -e '1d' | grep ^${PREFIX}`

    for db in $DBs; do
        tbls=`Mysql $db "SHOW TABLES" | sed -e '1d'`
        for tbl in $tbls; do
            code=
            ret=`Mysql $db "ALTER TABLE $tbl ENGINE = MEMORY" 2>&1` || code=$?
            if [ -n "$code" ]; then
                echo "Error ($db:$tbl): $ret"
            else
                echo "Converted ($db:$tbl)"
            fi
        done
    done
}

Mysql() {
    if [ $# -eq 1 ]; then
        echo "$1" | $MYSQL;
    else
        echo "$2" | $MYSQL $1;
    fi
}

if [ $# -ne 3 ]; then
    usage
    exit 1
else
    main $1 $2 $3
fi