X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FStorage%2FDBI.pm;h=1ed743d7c15cb1c96f72f3ef40b59c73310f0217;hb=f1952f5c69e092d9ce416586f29942f8c2f66bce;hp=666d3185124f5c4fe2e62e647602d08a2544a5bc;hpb=ba61fa2a8d50d0068905aa968b7514f1136ce110;p=dbsrgits%2FDBIx-Class-Historic.git

diff --git a/lib/DBIx/Class/Storage/DBI.pm b/lib/DBIx/Class/Storage/DBI.pm
index 666d318..1ed743d 100644
--- a/lib/DBIx/Class/Storage/DBI.pm
+++ b/lib/DBIx/Class/Storage/DBI.pm
@@ -7,7 +7,6 @@ use strict;
 use warnings;
 use Carp::Clan qw/^DBIx::Class/;
 use DBI;
-use DBIx::Class::SQLAHacks;
 use DBIx::Class::Storage::DBI::Cursor;
 use DBIx::Class::Storage::Statistics;
 use Scalar::Util();
@@ -603,6 +602,7 @@ sub sql_maker {
   my ($self) = @_;
   unless ($self->_sql_maker) {
     my $sql_maker_class = $self->sql_maker_class;
+    $self->ensure_class_loaded ($sql_maker_class);
     $self->_sql_maker($sql_maker_class->new( $self->_sql_maker_args ));
   }
   return $self->_sql_maker;
@@ -910,6 +910,7 @@ sub _prep_for_execute {
   return ($sql, \@bind);
 }
 
+
 sub _fix_bind_params {
     my ($self, @bind) = @_;
 
@@ -931,7 +932,7 @@ sub _query_start {
 
     if ( $self->debug ) {
         @bind = $self->_fix_bind_params(@bind);
-        
+
         $self->debugobj->query_start( $sql, @bind );
     }
 }
@@ -991,7 +992,7 @@ sub _execute {
 sub insert {
   my ($self, $source, $to_insert) = @_;
 
-  my $ident = $source->from; 
+  my $ident = $source->from;
   my $bind_attributes = $self->source_bind_attributes($source);
 
   my $updated_cols = {};
@@ -1104,7 +1105,7 @@ sub delete {
 # Genarating a single PK column subquery is trivial and supported
 # by all RDBMS. However if we have a multicolumn PK, things get ugly.
 # Look at _multipk_update_delete()
-sub subq_update_delete {
+sub _subq_update_delete {
   my $self = shift;
   my ($rs, $op, $values) = @_;
 
@@ -1190,53 +1191,56 @@ sub _per_row_update_delete {
 
 sub _select {
   my $self = shift;
+
+  # localization is neccessary as
+  # 1) there is no infrastructure to pass this around (easy to do, but will wait)
+  # 2) _select_args sets it and _prep_for_execute consumes it
   my $sql_maker = $self->sql_maker;
   local $sql_maker->{for};
+
   return $self->_execute($self->_select_args(@_));
 }
 
+sub _select_args_to_query {
+  my $self = shift;
+
+  # localization is neccessary as
+  # 1) there is no infrastructure to pass this around (easy to do, but will wait)
+  # 2) _select_args sets it and _prep_for_execute consumes it
+  my $sql_maker = $self->sql_maker;
+  local $sql_maker->{for};
+
+  # my ($op, $bind, $ident, $bind_attrs, $select, $cond, $order, $rows, $offset)
+  #  = $self->_select_args($ident, $select, $cond, $attrs);
+  my ($op, $bind, $ident, $bind_attrs, @args) =
+    $self->_select_args(@_);
+
+  # my ($sql, $prepared_bind) = $self->_prep_for_execute($op, $bind, $ident, [ $select, $cond, $order, $rows, $offset ]);
+  my ($sql, $prepared_bind) = $self->_prep_for_execute($op, $bind, $ident, \@args);
+  $prepared_bind ||= [];
+
+  return wantarray
+    ? ($sql, $prepared_bind, $bind_attrs)
+    : \[ "($sql)", @$prepared_bind ]
+  ;
+}
+
 sub _select_args {
   my ($self, $ident, $select, $condition, $attrs) = @_;
-  my $order = $attrs->{order_by};
 
-  my $for = delete $attrs->{for};
   my $sql_maker = $self->sql_maker;
-  $sql_maker->{for} = $for;
-
-  my @in_order_attrs = qw/group_by having _virtual_order_by/;
-  if (List::Util::first { exists $attrs->{$_} } (@in_order_attrs) ) {
-    $order = {
-      ($order
-        ? (order_by => $order)
-        : ()
-      ),
-      ( map { $_ => $attrs->{$_} } (@in_order_attrs) )
-    };
-  }
-
-  # the reason this is so contrived is because we have several tables in
-  # from, each with its own set of bindattrs
-  my $alias2source;
-  if ( Scalar::Util::blessed($ident) && $ident->isa("DBIx::Class::ResultSource") ) {
-    $alias2source->{$ident->alias} = $ident;
-  }
-  elsif (ref $ident eq 'ARRAY') {
+  $sql_maker->{for} = delete $attrs->{for};
 
-    for (@$ident) {
-      my $tabinfo;
-      if (ref $_ eq 'HASH') {
-        $tabinfo = $_;
-      }
-      if (ref $_ eq 'ARRAY' and ref $_->[0] eq 'HASH') {
-        $tabinfo = $_->[0];
-      }
+  my $order = { map
+    { $attrs->{$_} ? ( $_ => $attrs->{$_} ) : ()  }
+    (qw/order_by group_by having _virtual_order_by/ )
+  };
 
-      $alias2source->{$tabinfo->{-alias}} = $tabinfo->{-result_source}
-        if ($tabinfo->{-result_source});
-    }
-  }
 
   my $bind_attrs = {};
+
+  my $alias2source = $self->_resolve_ident_sources ($ident);
+
   for my $alias (keys %$alias2source) {
     my $bindtypes = $self->source_bind_attributes ($alias2source->{$alias}) || {};
     for my $col (keys %$bindtypes) {
@@ -1249,6 +1253,14 @@ sub _select_args {
     }
   }
 
+  # This would be the point to deflate anything found in $condition
+  # (and leave $attrs->{bind} intact). Problem is - inflators historically
+  # expect a row object. And all we have is a resultsource (it is trivial
+  # to extract deflator coderefs via $alias2source above).
+  #
+  # I don't see a way forward other than changing the way deflators are
+  # invoked, and that's just bad...
+
   my @args = ('select', $attrs->{bind}, $ident, $bind_attrs, $select, $condition, $order);
   if ($attrs->{software_limit} ||
       $sql_maker->_default_limit_syntax eq "GenericSubQ") {
@@ -1264,16 +1276,46 @@ sub _select_args {
   return @args;
 }
 
+sub _resolve_ident_sources {
+  my ($self, $ident) = @_;
+
+  my $alias2source = {};
+
+  # the reason this is so contrived is that $ident may be a {from}
+  # structure, specifying multiple tables to join
+  if ( Scalar::Util::blessed($ident) && $ident->isa("DBIx::Class::ResultSource") ) {
+    # this is compat mode for insert/update/delete which do not deal with aliases
+    $alias2source->{me} = $ident;
+  }
+  elsif (ref $ident eq 'ARRAY') {
+
+    for (@$ident) {
+      my $tabinfo;
+      if (ref $_ eq 'HASH') {
+        $tabinfo = $_;
+      }
+      if (ref $_ eq 'ARRAY' and ref $_->[0] eq 'HASH') {
+        $tabinfo = $_->[0];
+      }
+
+      $alias2source->{$tabinfo->{-alias}} = $tabinfo->{-source_handle}->resolve
+        if ($tabinfo->{-source_handle});
+    }
+  }
+
+  return $alias2source;
+}
+
 sub count {
   my ($self, $source, $attrs) = @_;
 
   my $tmp_attrs = { %$attrs };
 
-  # take off any column specs, any pagers, record_filter is cdbi, and no point of ordering a count
-  delete $tmp_attrs->{$_} for (qw/columns +columns select +select as +as rows offset page pager order_by record_filter/);
+  # take off any pagers, record_filter is cdbi, and no point of ordering a count
+  delete $tmp_attrs->{$_} for (qw/select as rows offset page order_by record_filter/);
 
+  # overwrite the selector
   $tmp_attrs->{select} = { count => '*' };
-  $tmp_attrs->{as} = [qw/count/];
 
   my $tmp_rs = $source->resultset_class->new($source, $tmp_attrs);
   my ($count) = $tmp_rs->cursor->next;
@@ -1294,7 +1336,7 @@ sub count_grouped {
   my $sub_attrs = { %$attrs };
 
   # these can not go in the subquery, and there is no point of ordering it
-  delete $sub_attrs->{$_} for qw/prefetch collapse select +select as +as columns +columns order_by/;
+  delete $sub_attrs->{$_} for qw/prefetch collapse select as order_by/;
 
   # if we prefetch, we group_by primary keys only as this is what we would get out of the rs via ->next/->all
   # simply deleting group_by suffices, as the code below will re-fill it
@@ -1303,18 +1345,30 @@ sub count_grouped {
     delete $sub_attrs->{group_by};
   }
 
-  $sub_attrs->{columns} = $sub_attrs->{group_by} ||= [ map { "$attrs->{alias}.$_" } ($source->primary_columns) ];
+  $sub_attrs->{group_by} ||= [ map { "$attrs->{alias}.$_" } ($source->primary_columns) ];
+  $sub_attrs->{select} = $self->_grouped_count_select ($source, $sub_attrs);
 
   $attrs->{from} = [{
     count_subq => $source->resultset_class->new ($source, $sub_attrs )->as_query
   }];
 
   # the subquery replaces this
-  delete $attrs->{$_} for qw/where bind prefetch collapse distinct group_by having having_bind rows offset page pager/;
+  delete $attrs->{$_} for qw/where bind prefetch collapse group_by having having_bind rows offset page pager/;
 
   return $self->count ($source, $attrs);
 }
 
+#
+# Returns a SELECT to go with a supplied GROUP BY
+# (caled by count_grouped so a group_by is present)
+# Most databases expect them to match, but some
+# choke in various ways.
+#
+sub _grouped_count_select {
+  my ($self, $source, $rs_args) = @_;
+  return $rs_args->{group_by};
+}
+
 sub source_bind_attributes {
   my ($self, $source) = @_;
   
@@ -1502,6 +1556,27 @@ sub bind_attribute_by_data_type {
     return;
 }
 
+=head2 is_datatype_numeric
+
+Given a datatype from column_info, returns a boolean value indicating if
+the current RDBMS considers it a numeric value. This controls how
+L<DBIx::Class::Row/set_column> decides whether to mark the column as
+dirty - when the datatype is deemed numeric a C<< != >> comparison will
+be performed instead of the usual C<eq>.
+
+=cut
+
+sub is_datatype_numeric {
+  my ($self, $dt) = @_;
+
+  return 0 unless $dt;
+
+  return $dt =~ /^ (?:
+    numeric | int(?:eger)? | (?:tiny|small|medium|big)int | dec(?:imal)? | real | float | double (?: \s+ precision)? | (?:big)?serial
+  ) $/ix;
+}
+
+
 =head2 create_ddl_dir (EXPERIMENTAL)
 
 =over 4