From: Rafael Kitover <rkitover@cpan.org>
Date: Wed, 2 Jun 2010 07:03:33 +0000 (+0000)
Subject: use SET ROWCOUNT for Sybase ASE limits without an offset
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=3f52831919a64ea6fb3269e41c547bc42e8db2fd;p=dbsrgits%2FDBIx-Class-Historic.git

use SET ROWCOUNT for Sybase ASE limits without an offset
---

diff --git a/lib/DBIx/Class/SQLAHacks.pm b/lib/DBIx/Class/SQLAHacks.pm
index cd086c4..e6df357 100644
--- a/lib/DBIx/Class/SQLAHacks.pm
+++ b/lib/DBIx/Class/SQLAHacks.pm
@@ -392,6 +392,21 @@ sub _Top {
   return $sql;
 }
 
+# This for Sybase ASE, to use SET ROWCOUNT when there is no offset, and
+# GenericSubQ otherwise.
+sub _RowCountOrGenericSubQ {
+  my $self = shift;
+  my ($sql, $rs_attrs, $rows, $offset) = @_;
+
+  return $self->_GenericSubQ(@_) if $offset;
+
+  return sprintf <<"EOF", $rows, $sql;
+SET ROWCOUNT %d
+%s
+SET ROWCOUNT 0
+EOF
+}
+
 # This is the most evil limit "dialect" (more of a hack) for *really*
 # stupid databases. It works by ordering the set by some unique column,
 # and calculating amount of rows that have a less-er value (thus
diff --git a/lib/DBIx/Class/Storage/DBI/Sybase/ASE.pm b/lib/DBIx/Class/Storage/DBI/Sybase/ASE.pm
index 80d7913..1022cc2 100644
--- a/lib/DBIx/Class/Storage/DBI/Sybase/ASE.pm
+++ b/lib/DBIx/Class/Storage/DBI/Sybase/ASE.pm
@@ -152,6 +152,16 @@ for my $method (@also_proxy_to_extra_storages) {
   };
 }
 
+sub _sql_maker_opts {
+  my ( $self, $opts ) = @_;
+
+  if ( $opts ) {
+    $self->{_sql_maker_opts} = { %$opts };
+  }
+
+  return { limit_dialect => 'RowCountOrGenericSubQ', %{$self->{_sql_maker_opts}||{}} };
+}
+
 sub disconnect {
   my $self = shift;