quick db upgrade script

upgrade-setup.sh

#!/bin/bash
set -x

if [ $1 ] ; then
    DBFROM=$1
fi

if [ $2 ]; then
    DBTO=$2
fi

# shrink tables
sudo -u postgres psql -ec "TRUNCATE mdl_log, mdl_backup_logs, mdl_tool_sync_preprocess_report, mdl_totara_sync_log;" $DBFROM
# drop connections
sudo -u postgres psql -ec "SELECT pg_terminate_backend(pg_stat_activity.pid) FROM pg_stat_activity WHERE pg_stat_activity.datname IN ('$DBFROM', '$DBTO') AND pid <> pg_backend_pid();" postgres

sudo -u postgres dropdb $DBTO
sudo -u postgres createdb -T $DBFROM -O $DBFROM $DBTO