~ubuntu-branches/ubuntu/trusty/drizzle/trusty

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; version 2 of the License.

#

# This program is distributed in the hope that it will be useful, but

# WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

# General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301

# USA

package GenTest::Transform::ExecuteAsUnion;

require Exporter;

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

use strict;

use lib 'lib';

use GenTest;

use GenTest::Transform;

use GenTest::Constants;

sub transform {

	my ($class, $original_query, $executor) = @_;

	return STATUS_WONT_HANDLE if $original_query !~ m{\s*SELECT}sio;

	my $original_query_no_limit = $original_query;

	$original_query_no_limit =~ s{LIMIT\s+\d+\s+OFFSET\s+\d+\s*$}{}sio;

	$original_query_no_limit =~ s{LIMIT\s+\d+\s*$}{}sio;

	return [

		"( $original_query ) UNION ALL ( $original_query_no_limit LIMIT 0 ) /* TRANSFORM_OUTCOME_UNORDERED_MATCH */",

		"( $original_query_no_limit LIMIT 0 ) UNION ALL ( $original_query ) /* TRANSFORM_OUTCOME_UNORDERED_MATCH */",

		"( $original_query ) UNION DISTINCT ( $original_query ) /* TRANSFORM_OUTCOME_DISTINCT */",

		"( $original_query ) UNION ALL ( $original_query ) /* TRANSFORM_OUTCOME_SUPERSET */"

	];

}

1;