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# Copyright (C) 2008-2009 Sun Microsystems, Inc. All rights reserved.
# Use is subject to license terms.
#
# 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::ExecuteAsWhereSubquery;
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, $original_result) = @_;
return STATUS_WONT_HANDLE if $original_query !~ m{^\s*SELECT}sio || $original_query =~ m{LIMIT}sio;
return STATUS_WONT_HANDLE if $original_result->rows() == 0;
# This transformation can not work if the result set contains NULLs
foreach my $orig_row (@{$original_result->data()}) {
foreach my $orig_col (@$orig_row) {
return STATUS_WONT_HANDLE if $orig_col eq '';
}
}
my $table_name = 'transforms.where_subselect_'.$$;
return [
"DROP TABLE IF EXISTS $table_name",
"CREATE TABLE $table_name $original_query",
"SELECT * FROM $table_name WHERE (".join(', ', @{$original_result->columnNames()}).") IN ( $original_query ) /* TRANSFORM_OUTCOME_UNORDERED_MATCH */",
"SELECT * FROM $table_name WHERE (".join(', ', @{$original_result->columnNames()}).") NOT IN ( $original_query ) /* TRANSFORM_OUTCOME_EMPTY_RESULT */",
"DROP TABLE $table_name",
];
}
1;
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