~drizzle-trunk/drizzle/development

package GenTest::Validator::SelectStability;

 

require Exporter;

@ISA = qw(GenTest::Validator GenTest);

 

use strict;

 

use GenTest;

use GenTest::Comparator;

use GenTest::Constants;

use GenTest::Result;

use GenTest::Validator;

use Time::HiRes;

 

sub validate {

        my ($validator, $executors, $results) = @_;

        my $executor = $executors->[0];

        my $orig_result = $results->[0];

        my $orig_query = $orig_result->query();

 

        return STATUS_OK if $orig_query !~ m{^\s*select}io;

        return STATUS_OK if not defined $orig_result->data();

 

        foreach my $delay (0, 0.01, 0.1) {

                Time::HiRes::sleep($delay);

                my $new_result = $executor->execute($orig_query);

                return STATUS_OK if not defined $new_result->data();

                my $compare_outcome = GenTest::Comparator::compare($orig_result, $new_result);

                if ($compare_outcome > STATUS_OK) {

                        say("Query: $orig_query; returns different result when executed after a delay of $delay seconds.");

                        say(GenTest::Comparator::dumpDiff($orig_result, $new_result));

                        return $compare_outcome - STATUS_SELECT_REDUCTION;

                }

        }

 

        return STATUS_OK;

}

 

1;