package # Hide from PAUSE
DBIx::Class::SQLAHacks::MSSQL;
+use warnings;
+use strict;
+
use base qw( DBIx::Class::SQLAHacks );
use Carp::Clan qw/^DBIx::Class|^SQL::Abstract/;
-sub _RowNumberOver {
- my $self = shift;
- my $sql = $self->SUPER::_RowNumberOver(@_);
- $sql =~ s/(\s*)SELECT\s Q1\.\*,\s ROW_NUMBER\(\)\s OVER\(\s \)\s AS\s ROW_NUM\s
- FROM\s \(\n(\s*.*)\n\s*(.*)\n\s*\)\s Q1
- /$1SELECT Q1.*, ROW_NUMBER() OVER($3) AS ROW_NUM FROM (\n$2\n) Q1/ixm;
- return $sql;
+# an MSSQL-specific implementation of the Row-Number-Over limiting
+# technique
+
+sub _MSRowNumberOver {
+ my ($self, $sql, $order, $rows, $offset ) = @_;
+
+ # get the order_by only (or make up an order if none exists)
+ my $order_by = $self->_order_by(
+ (delete $order->{order_by}) || \ '(SELECT (1))'
+ );
+
+ # whatever is left
+ my $group_having = $self->_order_by($order);
+
+ $sql = sprintf (<<'EOS', $order_by, $sql, $group_having, $offset + 1, $offset + $rows, );
+
+SELECT * FROM (
+ SELECT orig_query.*, ROW_NUMBER() OVER(%s ) AS rno__row__index FROM (%s%s) orig_query
+) rno_subq WHERE rno__row__index BETWEEN %d AND %d
+
+EOS
+
+ $sql =~ s/\s*\n\s*/ /g; # easier to read in the debugger
+ return $sql;
}
1;