--- /dev/null
+#!/usr/bin/perl
+
+use FindBin qw/$Bin/;
+use Test::More;
+use Test::SQL::Translator;
+use Test::Exception;
+use Data::Dumper;
+use SQL::Translator;
+use SQL::Translator::Diff;
+
+BEGIN {
+ maybe_plan(2, 'SQL::Translator::Parser::YAML',
+ 'SQL::Translator::Producer::Oracle');
+}
+
+my $schema1 = $Bin.'/data/oracle/schema_diff_a.yaml';
+my $schema2 = $Bin.'/data/oracle/schema_diff_b.yaml';
+
+open my $io1, '<', $schema1 or die $!;
+open my $io2, '<', $schema2 or die $!;
+
+my ($yaml1, $yaml2);
+{
+ local $/ = undef;
+ $yaml1 = <$io1>;
+ $yaml2 = <$io2>;
+};
+
+close $io1;
+close $io2;
+
+my $s = SQL::Translator->new(from => 'YAML');
+$s->parser->($s,$yaml1);
+
+my $t = SQL::Translator->new(from => 'YAML');
+$t->parser->($t,$yaml2);
+
+my $d = SQL::Translator::Diff->new
+ ({
+ output_db => 'Oracle',
+ source_schema => $s->schema,
+ target_schema => $t->schema,
+ });
+
+
+my $diff = $d->compute_differences->produce_diff_sql || die $d->error;
+
+ok($diff, 'Diff generated.');
+like($diff, '/ALTER TABLE d_operator CHANGE COLUMN \( name nvarchar2\(10\) \)/',
+ 'Alter table generated.');