X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FStorage%2FDBI%2FOracle%2FGeneric.pm;h=e6bf5ae1fe85862eb959935aa3f02c6b9918ab1e;hb=3895349e454e6b3fd36188b27e565acfa7da601e;hp=65df78b30d8a3c3f1506f7564da8744503f0110e;hpb=a4433d8e55074f96911ede2a922fced8b96743de;p=dbsrgits%2FDBIx-Class.git

diff --git a/lib/DBIx/Class/Storage/DBI/Oracle/Generic.pm b/lib/DBIx/Class/Storage/DBI/Oracle/Generic.pm
index 65df78b..e6bf5ae 100644
--- a/lib/DBIx/Class/Storage/DBI/Oracle/Generic.pm
+++ b/lib/DBIx/Class/Storage/DBI/Oracle/Generic.pm
@@ -2,6 +2,8 @@ package DBIx::Class::Storage::DBI::Oracle::Generic;
 
 use strict;
 use warnings;
+use Scope::Guard ();
+use Context::Preserve ();
 
 =head1 NAME
 
@@ -15,6 +17,51 @@ DBIx::Class::Storage::DBI::Oracle::Generic - Oracle Support for DBIx::Class
   __PACKAGE__->set_primary_key('id');
   __PACKAGE__->sequence('mysequence');
 
+  # Somewhere in your Code
+  # add some data to a table with a hierarchical relationship
+  $schema->resultset('Person')->create ({
+        firstname => 'foo',
+        lastname => 'bar',
+        children => [
+            {
+                firstname => 'child1',
+                lastname => 'bar',
+                children => [
+                    {
+                        firstname => 'grandchild',
+                        lastname => 'bar',
+                    }
+                ],
+            },
+            {
+                firstname => 'child2',
+                lastname => 'bar',
+            },
+        ],
+    });
+
+  # select from the hierarchical relationship
+  my $rs = $schema->resultset('Person')->search({},
+    {
+      'start_with' => { 'firstname' => 'foo', 'lastname' => 'bar' },
+      'connect_by' => { 'parentid' => { '-prior' => \'persionid' },
+      'order_siblings_by' => { -asc => 'name' },
+    };
+  );
+
+  # this will select the whole tree starting from person "foo bar", creating
+  # following query:
+  # SELECT
+  #     me.persionid me.firstname, me.lastname, me.parentid
+  # FROM
+  #     person me
+  # START WITH
+  #     firstname = 'foo' and lastname = 'bar'
+  # CONNECT BY
+  #     parentid = prior persionid
+  # ORDER SIBLINGS BY
+  #     firstname ASC
+
 =head1 DESCRIPTION
 
 This class implements base Oracle support. The subclass
@@ -28,20 +75,22 @@ versions before 9.
 use base qw/DBIx::Class::Storage::DBI/;
 use mro 'c3';
 
+__PACKAGE__->sql_maker_class('DBIx::Class::SQLAHacks::Oracle');
+
 sub deployment_statements {
   my $self = shift;;
   my ($schema, $type, $version, $dir, $sqltargs, @rest) = @_;
 
   $sqltargs ||= {};
-	my $quote_char = $self->schema->storage->{'_sql_maker_opts'}->{'quote_char'};
-	$sqltargs->{quote_table_names} = 0 unless $quote_char;
-	$sqltargs->{quote_field_names} = 0 unless $quote_char;
+  my $quote_char = $self->schema->storage->sql_maker->quote_char;
+  $sqltargs->{quote_table_names} = $quote_char ? 1 : 0;
+  $sqltargs->{quote_field_names} = $quote_char ? 1 : 0;
 
-	my $oracle_version = eval { $self->_get_dbh->get_info(18) };
+  my $oracle_version = eval { $self->_get_dbh->get_info(18) };
 
   $sqltargs->{producer_args}{oracle_version} = $oracle_version;
 
-	$self->next::method($schema, $type, $version, $dir, $sqltargs, @rest);
+  $self->next::method($schema, $type, $version, $dir, $sqltargs, @rest);
 }
 
 sub _dbh_last_insert_id {
@@ -58,54 +107,42 @@ sub _dbh_last_insert_id {
 sub _dbh_get_autoinc_seq {
   my ($self, $dbh, $source, $col) = @_;
 
-	# check if quoting is on
-	my $quote_char = $self->schema->storage->{'_sql_maker_opts'}->{'quote_char'};
+  my $sql_maker = $self->sql_maker;
 
-  # look up the correct sequence automatically
-  my $sql = q{
-    SELECT trigger_body FROM ALL_TRIGGERS t
-    WHERE t.table_name = ?
-    AND t.triggering_event = 'INSERT'
-    AND t.status = 'ENABLED'
-  };
+  my $source_name;
+  if ( ref $source->name eq 'SCALAR' ) {
+    $source_name = ${$source->name};
+  }
+  else {
+    $source_name = $source->name;
+  }
+  $source_name = uc($source_name) unless $sql_maker->quote_char;
 
   # trigger_body is a LONG
   local $dbh->{LongReadLen} = 64 * 1024 if ($dbh->{LongReadLen} < 64 * 1024);
 
-  my $sth;
+  # disable default bindtype
+  local $sql_maker->{bindtype} = 'normal';
 
-  my $source_name;
-  if ( ref $source->name ne 'SCALAR' ) {
-      $source_name = $source->name;
-  }
-  else {
-      $source_name = ${$source->name};
-  }
-	$source_name = uc($source_name) unless $quote_char;
-
-  # check for fully-qualified name (eg. SCHEMA.TABLENAME)
-  if ( my ( $schema, $table ) = $source_name =~ /(\w+)\.(\w+)/ ) {
-    $sql = q{
-      SELECT trigger_body FROM ALL_TRIGGERS t
-      WHERE t.owner = ? AND t.table_name = ?
-      AND t.triggering_event = 'INSERT'
-      AND t.status = 'ENABLED'
-    };
-    $sth = $dbh->prepare($sql);
-		my $table_name = $self -> sql_maker -> _quote($table);
-		#my $schema_name = $self -> sql_maker -> _quote($schema);
-		my $schema_name = uc($schema);
+  # look up the correct sequence automatically
+  my ( $schema, $table ) = $source_name =~ /(\w+)\.(\w+)/;
+  my ($sql, @bind) = $sql_maker->select (
+    'ALL_TRIGGERS',
+    ['trigger_body'],
+    {
+      $schema ? (owner => $schema) : (),
+      table_name => $table || $source_name,
+      triggering_event => 'INSERT',
+      status => 'ENABLED',
+     },
+  );
+  my $sth = $dbh->prepare($sql);
+  $sth->execute (@bind);
 
-    $sth->execute( $schema_name, $table_name );
-  }
-  else {
-    $sth = $dbh->prepare($sql);
-    $sth->execute( $source_name );
-  }
   while (my ($insert_trigger) = $sth->fetchrow_array) {
     return $1 if $insert_trigger =~ m!("?\w+"?)\.nextval!i; # col name goes here???
   }
-  $self->throw_exception("Unable to find a sequence INSERT trigger on table '" . $source->name . "'.");
+  $self->throw_exception("Unable to find a sequence INSERT trigger on table '$source_name'.");
 }
 
 sub _sequence_fetch {
@@ -120,9 +157,10 @@ sub _ping {
   my $dbh = $self->_dbh or return 0;
 
   local $dbh->{RaiseError} = 1;
+  local $dbh->{PrintError} = 0;
 
   eval {
-    $dbh->do("select 1 from dual");
+    $dbh->do('select 1 from dual');
   };
 
   return $@ ? 0 : 1;
@@ -159,7 +197,7 @@ sub _dbh_execute {
 
   $self->throw_exception($exception) if $exception;
 
-  wantarray ? @res : $res[0]
+  $wantarray ? @res : $res[0]
 }
 
 =head2 get_autoinc_seq
@@ -202,10 +240,10 @@ Used as:
 
     on_connect_call => 'datetime_setup'
 
-In L<DBIx::Class::Storage::DBI/connect_info> to set the session nls date, and
-timestamp values for use with L<DBIx::Class::InflateColumn::DateTime> and the
-necessary environment variables for L<DateTime::Format::Oracle>, which is used
-by it.
+In L<connect_info|DBIx::Class::Storage::DBI/connect_info> to set the session nls
+date, and timestamp values for use with L<DBIx::Class::InflateColumn::DateTime>
+and the necessary environment variables for L<DateTime::Format::Oracle>, which
+is used by it.
 
 Maximum allowable precision is used, unless the environment variables have
 already been set.
@@ -350,6 +388,146 @@ sub relname_to_table_alias {
   return $new_alias;
 }
 
+=head2 with_deferred_fk_checks
+
+Runs a coderef between:
+
+  alter session set constraints = deferred
+  ...
+  alter session set constraints = immediate
+
+to defer foreign key checks.
+
+Constraints must be declared C<DEFERRABLE> for this to work.
+
+=cut
+
+sub with_deferred_fk_checks {
+  my ($self, $sub) = @_;
+
+  my $txn_scope_guard = $self->txn_scope_guard;
+
+  $self->_do_query('alter session set constraints = deferred');
+
+  my $sg = Scope::Guard->new(sub {
+    $self->_do_query('alter session set constraints = immediate');
+  });
+
+  return Context::Preserve::preserve_context(sub { $sub->() },
+    after => sub { $txn_scope_guard->commit });
+}
+
+sub _select_args {
+    my ($self, $ident, $select, $where, $attrs) = @_;
+
+    my $connect_by_args = {};
+    if ( $attrs->{connect_by} || $attrs->{start_with} || $attrs->{order_siblings_by} || $attrs->{nocycle} ) {
+        $connect_by_args = {
+            connect_by => $attrs->{connect_by},
+            nocycle => $attrs->{nocycle},
+            start_with => $attrs->{start_with},
+            order_siblings_by => $attrs->{order_siblings_by},
+        }
+    }
+
+    my @rv = $self->next::method($ident, $select, $where, $attrs);
+
+    return (@rv, $connect_by_args);
+}
+
+=head1 ATTRIBUTES
+
+Following additional attributes can be used in resultsets.
+
+=head2 connect_by
+
+=over 4
+
+=item Value: \%connect_by
+
+=back
+
+A hashref of conditions used to specify the relationship between parent rows
+and child rows of the hierarchy.
+
+  connect_by => { parentid => 'prior personid' }
+
+  # adds a connect by statement to the query:
+  # SELECT
+  #     me.persionid me.firstname, me.lastname, me.parentid
+  # FROM
+  #     person me
+  # CONNECT BY
+  #     parentid = prior persionid
+
+=head2 nocycle
+
+=over 4
+
+=item Value: [1|0]
+
+=back
+
+If you want to use NOCYCLE set to 1.
+
+    connect_by => { parentid => 'prior personid' },
+    nocycle    => 1
+
+    # adds a connect by statement to the query:
+    # SELECT
+    #     me.persionid me.firstname, me.lastname, me.parentid
+    # FROM
+    #     person me
+    # CONNECT BY NOCYCLE
+    #     parentid = prior persionid
+
+
+=head2 start_with
+
+=over 4
+
+=item Value: \%condition
+
+=back
+
+A hashref of conditions which specify the root row(s) of the hierarchy.
+
+It uses the same syntax as L<DBIx::Class::ResultSet/search>
+
+  start_with => { firstname => 'Foo', lastname => 'Bar' }
+
+  # SELECT
+  #     me.persionid me.firstname, me.lastname, me.parentid
+  # FROM
+  #     person me
+  # START WITH
+  #     firstname = 'foo' and lastname = 'bar'
+  # CONNECT BY
+  #     parentid = prior persionid
+
+=head2 order_siblings_by
+
+=over 4
+
+=item Value: ($order_siblings_by | \@order_siblings_by)
+
+=back
+
+Which column(s) to order the siblings by.
+
+It uses the same syntax as L<DBIx::Class::ResultSet/order_by>
+
+  'order_siblings_by' => 'firstname ASC'
+
+  # SELECT
+  #     me.persionid me.firstname, me.lastname, me.parentid
+  # FROM
+  #     person me
+  # CONNECT BY
+  #     parentid = prior persionid
+  # ORDER SIBLINGS BY
+  #     firstname ASC
+
 =head1 AUTHOR
 
 See L<DBIx::Class/CONTRIBUTORS>.