#!/bin/bash

# Drop tables which don't exist in the database dump.

[ -n "$1" ] || { echo -e "\nUsage: $0 DUMPFILE\n\nError: No database dump file given"; exit 1; }

zcat $1 | head | grep "Database: ietf_utf8" || { echo "Is this a database dump?  Expected to see 'Database: ietf_utf8' "; exit 1; }

echo -e "\nSQL commands:\n"

diff <(zcat $1 | grep '^DROP TABLE IF EXISTS' | tr -d '`;' | field 5) <(ietf/manage.py dbshell <<< 'show tables;' | tail -n +2) | grep '^>' | awk '{print "drop table if exists", $2, ";";}' | tee /dev/stderr | ietf/manage.py dbshell

echo -e "\nDone"