#!/bin/bash
#
# This file is included by /etc/mysql/debian-start
#

## Check for tables needing an upgrade.
# - Requires the server to be up.
# - Is supposed to run silently in background.
function upgrade_system_tables_if_necessary() {
  set -e
  set -u

  logger -p daemon.info -i -t"$0" "Upgrading MySQL tables if necessary."

  # Filter all "duplicate column", "duplicate key" and "unknown column"
  # errors as the script is designed to be idempotent.
  LC_ALL=C $MYUPGRADE \
    2>&1 \
    | egrep -v '^(1|@had|ERROR (1051|1054|1060|1061|1146|1347|1348))' \
    | logger -p daemon.warn -i -t"$0"
}

## Check for the presence of both, root accounts with and without password.
# This might have been caused by a bug related to mysql_install_db (#418672).
function check_root_accounts() {
  set -e
  set -u

  logger -p daemon.info -i -t"$0" "Checking for insecure root accounts."

  ret=$( echo "SELECT count(*) FROM mysql.user WHERE user='root' and password='' and plugin in ('', 'mysql_native_password', 'mysql_old_password');" | $MARIADB --skip-column-names )
  if [ "$ret" -ne "0" ]; then
    logger -p daemon.warn -i -t"$0" "WARNING: mysql.user contains $ret root accounts without password!"
  fi
}