X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FStorage%2FDBI%2FMSSQL.pm;h=46f582887ed7a708b67545c10870f4866e9d8925;hb=0e773352a;hp=1893c666e8b480b284b6747b91390d54ea35efde;hpb=d74f2da92c4cc45af8154f7925e5a8c2e1a2a30c;p=dbsrgits%2FDBIx-Class.git

diff --git a/lib/DBIx/Class/Storage/DBI/MSSQL.pm b/lib/DBIx/Class/Storage/DBI/MSSQL.pm
index 1893c66..46f5828 100644
--- a/lib/DBIx/Class/Storage/DBI/MSSQL.pm
+++ b/lib/DBIx/Class/Storage/DBI/MSSQL.pm
@@ -3,137 +3,89 @@ package DBIx::Class::Storage::DBI::MSSQL;
 use strict;
 use warnings;
 
-use base qw/DBIx::Class::Storage::DBI::AmbiguousGlob DBIx::Class::Storage::DBI/;
+use base qw/DBIx::Class::Storage::DBI::UniqueIdentifier/;
 use mro 'c3';
-
-use List::Util();
+use Try::Tiny;
+use List::Util 'first';
+use namespace::clean;
 
 __PACKAGE__->mk_group_accessors(simple => qw/
-  _identity _identity_method
+  _identity _identity_method _pre_insert_sql _post_insert_sql
 /);
 
-__PACKAGE__->sql_maker_class('DBIx::Class::SQLAHacks::MSSQL');
+__PACKAGE__->sql_maker_class('DBIx::Class::SQLMaker::MSSQL');
 
-sub _set_identity_insert {
-  my ($self, $table) = @_;
+__PACKAGE__->sql_quote_char([qw/[ ]/]);
 
-  my $sql = sprintf (
-    'SET IDENTITY_INSERT %s ON',
-    $self->sql_maker->_quote ($table),
-  );
+__PACKAGE__->datetime_parser_type (
+  'DBIx::Class::Storage::DBI::MSSQL::DateTime::Format'
+);
 
-  my $dbh = $self->_get_dbh;
-  eval { $dbh->do ($sql) };
-  if ($@) {
-    $self->throw_exception (sprintf "Error executing '%s': %s",
-      $sql,
-      $dbh->errstr,
-    );
-  }
-}
 
-sub _unset_identity_insert {
+__PACKAGE__->new_guid('NEWID()');
+
+sub _set_identity_insert {
   my ($self, $table) = @_;
 
-  my $sql = sprintf (
-    'SET IDENTITY_INSERT %s OFF',
-    $self->sql_maker->_quote ($table),
-  );
+  my $stmt = 'SET IDENTITY_INSERT %s %s';
+  $table   = $self->sql_maker->_quote($table);
 
-  my $dbh = $self->_get_dbh;
-  $dbh->do ($sql);
+  $self->_pre_insert_sql (sprintf $stmt, $table, 'ON');
+  $self->_post_insert_sql(sprintf $stmt, $table, 'OFF');
 }
 
 sub insert_bulk {
   my $self = shift;
   my ($source, $cols, $data) = @_;
 
-  my $is_identity_insert = (List::Util::first
-      { $source->column_info ($_)->{is_auto_increment} }
-      (@{$cols})
-  )
-     ? 1
-     : 0;
+  my $is_identity_insert =
+    (first { $_->{is_auto_increment} } values %{ $source->columns_info($cols) } )
+      ? 1
+      : 0
+  ;
 
   if ($is_identity_insert) {
      $self->_set_identity_insert ($source->name);
   }
 
   $self->next::method(@_);
-
-  if ($is_identity_insert) {
-     $self->_unset_identity_insert ($source->name);
-  }
 }
 
-# support MSSQL GUID column types
-
 sub insert {
   my $self = shift;
   my ($source, $to_insert) = @_;
 
   my $supplied_col_info = $self->_resolve_column_info($source, [keys %$to_insert] );
 
-  my %guid_cols;
-  my @pk_cols = $source->primary_columns;
-  my %pk_cols;
-  @pk_cols{@pk_cols} = ();
-
-  my @pk_guids = grep {
-    $source->column_info($_)->{data_type}
-    &&
-    $source->column_info($_)->{data_type} =~ /^uniqueidentifier/i
-  } @pk_cols;
-
-  my @auto_guids = grep {
-    $source->column_info($_)->{data_type}
-    &&
-    $source->column_info($_)->{data_type} =~ /^uniqueidentifier/i
-    &&
-    $source->column_info($_)->{auto_nextval}
-  } grep { not exists $pk_cols{$_} } $source->columns;
-
-  my @get_guids_for =
-    grep { not exists $to_insert->{$_} } (@pk_guids, @auto_guids);
-
-  my $updated_cols = {};
-
-  for my $guid_col (@get_guids_for) {
-    my ($new_guid) = $self->_get_dbh->selectrow_array('SELECT NEWID()');
-    $updated_cols->{$guid_col} = $to_insert->{$guid_col} = $new_guid;
-  }
-
-  my $is_identity_insert = (List::Util::first { $_->{is_auto_increment} } (values %$supplied_col_info) )
-     ? 1
-     : 0;
+  my $is_identity_insert =
+    (first { $_->{is_auto_increment} } values %$supplied_col_info) ? 1 : 0;
 
   if ($is_identity_insert) {
      $self->_set_identity_insert ($source->name);
   }
 
-  $updated_cols = { %$updated_cols, %{ $self->next::method(@_) } };
-
-  if ($is_identity_insert) {
-     $self->_unset_identity_insert ($source->name);
-  }
-
+  my $updated_cols = $self->next::method(@_);
 
   return $updated_cols;
 }
 
 sub _prep_for_execute {
   my $self = shift;
-  my ($op, $extra_bind, $ident, $args) = @_;
+  my ($op, $ident, $args) = @_;
 
 # cast MONEY values properly
   if ($op eq 'insert' || $op eq 'update') {
     my $fields = $args->[0];
 
+    my $colinfo = $ident->columns_info([keys %$fields]);
+
     for my $col (keys %$fields) {
       # $ident is a result source object with INSERT/UPDATE ops
-      if ($ident->column_info ($col)->{data_type}
-         &&
-         $ident->column_info ($col)->{data_type} =~ /^money\z/i) {
+      if (
+        $colinfo->{$col}{data_type}
+          &&
+        $colinfo->{$col}{data_type} =~ /^money\z/i
+      ) {
         my $val = $fields->{$col};
         $fields->{$col} = \['CAST(? AS MONEY)', [ $col => $val ]];
       }
@@ -143,8 +95,15 @@ sub _prep_for_execute {
   my ($sql, $bind) = $self->next::method (@_);
 
   if ($op eq 'insert') {
-    $sql .= ';SELECT SCOPE_IDENTITY()';
-
+    if (my $prepend = $self->_pre_insert_sql) {
+      $sql = "${prepend}\n${sql}";
+      $self->_pre_insert_sql(undef);
+    }
+    if (my $append  = $self->_post_insert_sql) {
+      $sql = "${sql}\n${append}";
+      $self->_post_insert_sql(undef);
+    }
+    $sql .= "\nSELECT SCOPE_IDENTITY()";
   }
 
   return ($sql, $bind);
@@ -154,13 +113,13 @@ sub _execute {
   my $self = shift;
   my ($op) = @_;
 
-  my ($rv, $sth, @bind) = $self->dbh_do($self->can('_dbh_execute'), @_);
+  my ($rv, $sth, @bind) = $self->next::method(@_);
 
   if ($op eq 'insert') {
 
     # this should bring back the result of SELECT SCOPE_IDENTITY() we tacked
     # on in _prep_for_execute above
-    my ($identity) = eval { $sth->fetchrow_array };
+    my ($identity) = try { $sth->fetchrow_array };
 
     # SCOPE_IDENTITY failed, but we can do something else
     if ( (! $identity) && $self->_identity_method) {
@@ -180,7 +139,7 @@ sub last_insert_id { shift->_identity }
 
 #
 # MSSQL is retarded wrt ordered subselects. One needs to add a TOP
-# to *all* subqueries, but one also can't use TOP 100 PERCENT
+# to *all* subqueries, but one also *can't* use TOP 100 PERCENT
 # http://sqladvice.com/forums/permalink/18496/22931/ShowThread.aspx#22931
 #
 sub _select_args_to_query {
@@ -190,11 +149,15 @@ sub _select_args_to_query {
 
   # see if this is an ordered subquery
   my $attrs = $_[3];
-  if ( scalar $self->sql_maker->_order_by_chunks ($attrs->{order_by}) ) {
+  if (
+    $sql !~ /^ \s* SELECT \s+ TOP \s+ \d+ \s+ /xi
+      &&
+    scalar $self->_extract_order_criteria ($attrs->{order_by})
+  ) {
     $self->throw_exception(
       'An ordered subselect encountered - this is not safe! Please see "Ordered Subselects" in DBIx::Class::Storage::DBI::MSSQL
-    ') unless $attrs->{unsafe_subselect};
-    my $max = 2 ** 32;
+    ') unless $attrs->{unsafe_subselect_ok};
+    my $max = $self->sql_maker->__max_int;
     $sql =~ s/^ \s* SELECT \s/SELECT TOP $max /xi;
   }
 
@@ -222,45 +185,92 @@ sub _svp_rollback {
   $self->_get_dbh->do("ROLLBACK TRANSACTION $name");
 }
 
-sub build_datetime_parser {
-  my $self = shift;
-  my $type = "DateTime::Format::Strptime";
-  eval "use ${type}";
-  $self->throw_exception("Couldn't load ${type}: $@") if $@;
-  return $type->new( pattern => '%Y-%m-%d %H:%M:%S' );  # %F %T
-}
-
 sub sqlt_type { 'SQLServer' }
 
-sub _get_mssql_version {
+sub sql_limit_dialect {
   my $self = shift;
 
-  my $data = $self->_get_dbh->selectrow_hashref('xp_msver ProductVersion');
+  my $supports_rno = 0;
 
-  if ($data->{Character_Value} =~ /^(\d+)\./) {
-    return $1;
-  } else {
-    $self->throw_exception(q{Your ProductVersion's Character_Value is missing or malformed!});
+  if (exists $self->_server_info->{normalized_dbms_version}) {
+    $supports_rno = 1 if $self->_server_info->{normalized_dbms_version} >= 9;
+  }
+  else {
+    # User is connecting via DBD::Sybase and has no permission to run
+    # stored procedures like xp_msver, or version detection failed for some
+    # other reason.
+    # So, we use a query to check if RNO is implemented.
+    try {
+      $self->_get_dbh->selectrow_array('SELECT row_number() OVER (ORDER BY rand())');
+      $supports_rno = 1;
+    };
   }
+
+  return $supports_rno ? 'RowNumberOver' : 'Top';
 }
 
-sub sql_maker {
+sub _ping {
   my $self = shift;
 
-  unless ($self->_sql_maker) {
-    unless ($self->{_sql_maker_opts}{limit_dialect}) {
-      my $version = eval { $self->_get_mssql_version; } || 0;
+  my $dbh = $self->_dbh or return 0;
 
-      $self->{_sql_maker_opts} = {
-        limit_dialect => ($version >= 9 ? 'RowNumberOver' : 'Top'),
-        %{$self->{_sql_maker_opts}||{}}
-      };
-    }
+  local $dbh->{RaiseError} = 1;
+  local $dbh->{PrintError} = 0;
 
-    my $maker = $self->next::method (@_);
-  }
+  return try {
+    $dbh->do('select 1');
+    1;
+  } catch {
+    0;
+  };
+}
+
+package # hide from PAUSE
+  DBIx::Class::Storage::DBI::MSSQL::DateTime::Format;
+
+my $datetime_format      = '%Y-%m-%d %H:%M:%S.%3N'; # %F %T
+my $smalldatetime_format = '%Y-%m-%d %H:%M:%S';
 
-  return $self->_sql_maker;
+my ($datetime_parser, $smalldatetime_parser);
+
+sub parse_datetime {
+  shift;
+  require DateTime::Format::Strptime;
+  $datetime_parser ||= DateTime::Format::Strptime->new(
+    pattern  => $datetime_format,
+    on_error => 'croak',
+  );
+  return $datetime_parser->parse_datetime(shift);
+}
+
+sub format_datetime {
+  shift;
+  require DateTime::Format::Strptime;
+  $datetime_parser ||= DateTime::Format::Strptime->new(
+    pattern  => $datetime_format,
+    on_error => 'croak',
+  );
+  return $datetime_parser->format_datetime(shift);
+}
+
+sub parse_smalldatetime {
+  shift;
+  require DateTime::Format::Strptime;
+  $smalldatetime_parser ||= DateTime::Format::Strptime->new(
+    pattern  => $smalldatetime_format,
+    on_error => 'croak',
+  );
+  return $smalldatetime_parser->parse_datetime(shift);
+}
+
+sub format_smalldatetime {
+  shift;
+  require DateTime::Format::Strptime;
+  $smalldatetime_parser ||= DateTime::Format::Strptime->new(
+    pattern  => $smalldatetime_format,
+    on_error => 'croak',
+  );
+  return $smalldatetime_parser->format_datetime(shift);
 }
 
 1;
@@ -339,13 +349,13 @@ rare. The benefits of ordered subselects are on the other hand too great to be
 outright disabled for MSSQL.
 
 Thus compromise between usability and perfection is the MSSQL-specific
-L<resultset attribute|DBIx::Class::ResultSet/ATTRIBUTES> C<unsafe_subselect>.
+L<resultset attribute|DBIx::Class::ResultSet/ATTRIBUTES> C<unsafe_subselect_ok>.
 It is deliberately not possible to set this on the Storage level, as the user
-should inspect (and preferrably regression-test) the return of every such
+should inspect (and preferably regression-test) the return of every such
 ResultSet individually. The example above would work if written like:
 
  $rs->search ({}, {
-  unsafe_subselect => 1,
+  unsafe_subselect_ok => 1,
   prefetch => 'relation',
   rows => 2,
   offset => 3,
@@ -354,11 +364,11 @@ ResultSet individually. The example above would work if written like:
 If it is possible to rewrite the search() in a way that will avoid the need
 for this flag - you are urged to do so. If DBIC internals insist that an
 ordered subselect is necessary for an operation, and you believe there is a
-differnt/better way to get the same result - please file a bugreport.
+different/better way to get the same result - please file a bugreport.
 
 =head1 AUTHOR
 
-See L<DBIx::Class/CONTRIBUTORS>.
+See L<DBIx::Class/AUTHOR> and L<DBIx::Class/CONTRIBUTORS>.
 
 =head1 LICENSE