X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FSQLMaker.pm;h=705c569deec137e826169288ca10c0a4d5f0a914;hb=be64931c710bcde7abe7334349b4c8a123645332;hp=ba932a7183b2689824e9b7e66f1e82c6bc030911;hpb=fcb7fcbb6bde5f9a211c62011b3110f07828caec;p=dbsrgits%2FDBIx-Class.git

diff --git a/lib/DBIx/Class/SQLMaker.pm b/lib/DBIx/Class/SQLMaker.pm
index ba932a7..705c569 100644
--- a/lib/DBIx/Class/SQLMaker.pm
+++ b/lib/DBIx/Class/SQLMaker.pm
@@ -27,9 +27,9 @@ Currently the enhancements to L<SQL::Abstract> are:
 
 =item * Support of C<...FOR UPDATE> type of select statement modifiers
 
-=item * The -ident operator
+=item * The L</-ident> operator
 
-=item * The -value operator
+=item * The L</-value> operator
 
 =back
 
@@ -93,6 +93,14 @@ BEGIN {
 # as the value to abuse with MSSQL ordered subqueries)
 sub __max_int () { 0x7FFFFFFF };
 
+# poor man's de-qualifier
+sub _quote {
+  $_[0]->next::method( ( $_[0]{_dequalify_idents} and ! ref $_[1] )
+    ? $_[1] =~ / ([^\.]+) $ /x
+    : $_[1]
+  );
+}
+
 sub new {
   my $self = shift->next::method(@_);
 
@@ -197,7 +205,12 @@ sub select {
       }
     ;
 
-    $sql = $self->$limiter ($sql, $rs_attrs, $limit, $offset);
+    $sql = $self->$limiter (
+      $sql,
+      { %{$rs_attrs||{}}, _selector_sql => $fields },
+      $limit,
+      $offset
+    );
   }
   else {
     ($sql, @bind) = $self->next::method ($table, $fields, $where, $rs_attrs);
@@ -216,7 +229,7 @@ sub select {
 
 sub _assemble_binds {
   my $self = shift;
-  return map { @{ (delete $self->{"${_}_bind"}) || [] } } (qw/select from where group having order limit/);
+  return map { @{ (delete $self->{"${_}_bind"}) || [] } } (qw/pre_select select from where group having order limit/);
 }
 
 my $for_syntax = {
@@ -428,15 +441,18 @@ sub _gen_from_blocks {
 sub _from_chunk_to_sql {
   my ($self, $fromspec) = @_;
 
-  return join (' ', $self->_SWITCH_refkind($fromspec, {
-    SCALARREF => sub {
+  return join (' ', do {
+    if (! ref $fromspec) {
+      $self->_quote($fromspec);
+    }
+    elsif (ref $fromspec eq 'SCALAR') {
       $$fromspec;
-    },
-    ARRAYREFREF => sub {
+    }
+    elsif (ref $fromspec eq 'REF' and ref $$fromspec eq 'ARRAY') {
       push @{$self->{from_bind}}, @{$$fromspec}[1..$#$$fromspec];
       $$fromspec->[0];
-    },
-    HASHREF => sub {
+    }
+    elsif (ref $fromspec eq 'HASH') {
       my ($as, $table, $toomuch) = ( map
         { $_ => $fromspec->{$_} }
         ( grep { $_ !~ /^\-/ } keys %$fromspec )
@@ -446,11 +462,11 @@ sub _from_chunk_to_sql {
         if defined $toomuch;
 
       ($self->_from_chunk_to_sql($table), $self->_quote($as) );
-    },
-    SCALAR => sub {
-      $self->_quote($fromspec);
-    },
-  }));
+    }
+    else {
+      $self->throw_exception('Unsupported from refkind: ' . ref $fromspec );
+    }
+  });
 }
 
 sub _join_condition {
@@ -488,6 +504,41 @@ sub _join_condition {
 
 1;
 
+=head1 OPERATORS
+
+=head2 -ident
+
+Used to explicitly specify an SQL identifier. Takes a plain string as value
+which is then invariably treated as a column name (and is being properly
+quoted if quoting has been requested). Most useful for comparison of two
+columns:
+
+    my %where = (
+        priority => { '<', 2 },
+        requestor => { -ident => 'submitter' }
+    );
+
+which results in:
+
+    $stmt = 'WHERE "priority" < ? AND "requestor" = "submitter"';
+    @bind = ('2');
+
+=head2 -value
+
+The -value operator signals that the argument to the right is a raw bind value.
+It will be passed straight to DBI, without invoking any of the SQL::Abstract
+condition-parsing logic. This allows you to, for example, pass an array as a
+column value for databases that support array datatypes, e.g.:
+
+    my %where = (
+        array => { -value => [1, 2, 3] }
+    );
+
+which results in:
+
+    $stmt = 'WHERE array = ?';
+    @bind = ([1, 2, 3]);
+
 =head1 AUTHORS
 
 See L<DBIx::Class/CONTRIBUTORS>.