#!/usr/bin/perl

use strict;
use warnings;

my ($query, $where, $before, $after, @before, @after);
my $better = 0;
my $worse = 0;
my %where = ();
my %gripe;
while (<>)
{
 	if (/from check_estimated_rows\('(.*)'\)/)
	{
		$query = $1;
		if ($query =~ m/where (.*)$/)
		{
			$where = $1;
			my %columns = map { $_ => 1 } ($where =~ m/(column_\d+)/g);
			my @normal = ('A'..'Z');
			my @columns = sort keys %columns;
			for my $i (0..$#columns)
			{
				my $old = $columns[$i];
				my $new = $normal[$i];
				$where =~ s/\b$old\b/$new/g;
			}
		}
	}
	elsif (m/^-(\s*(\d+)\s*\|\s*(\d+)\s*\|\s*(\d+))\s*$/)
	{
		($before, @before) = ($1, $2, $3, $4);
	}
	elsif (m/^\+(\s*(\d+)\s*\|\s*(\d+)\s*\|\s*(\d+))\s*$/)
	{
		($after, @after) = ($1, $2, $3, $4);

		$where{$where}->{better} ||= 0;
		$where{$where}->{worse} ||= 0;

		# Don't count the difference as meaningful unless we're more than 5 better or worse than before
		if ($after[2] > 5 + $before[2])
		{
			$worse++;
			$where{$where}->{worse}++;
		}
		elsif ($after[2] + 5 < $before[2])
		{
			$better++;
			$where{$where}->{better}++;
		}

		if (!exists $gripe{$where} && $where{$where}->{better} == 0 && $where{$where}->{worse} > 50)
		{
			print "TERRIBLE:\n";
			print "\tQUERY: $query\n";
			print "\tBEFORE: $before\n";
			print "\tAFTER:  $after\n\n";
			$gripe{$query} = 1;
		}
	}
}

foreach my $where (sort keys %where)
{
	if ($where{$where}->{better} < $where{$where}->{worse})
	{
		print("better:", $where{$where}->{better}, ", worse:", $where{$where}->{worse}, ":  $where\n");
	}
}
print("\n\nTOTAL:\n");
print("\tbetter: $better\n");
print("\tworse: $worse\n");