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1 | package DBIx::Class::Storage::DBI::Sybase::NoBindVars; |
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2 | |
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3 | use Class::C3; |
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4 | use base qw/ |
5 | DBIx::Class::Storage::DBI::NoBindVars |
6 | DBIx::Class::Storage::DBI::Sybase |
7 | /; |
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8 | use List::Util (); |
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9 | use Scalar::Util (); |
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10 | |
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11 | sub _rebless { |
12 | my $self = shift; |
13 | $self->disable_sth_caching(1); |
14 | } |
15 | |
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16 | # this works when NOT using placeholders |
17 | sub _fetch_identity_sql { 'SELECT @@IDENTITY' } |
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18 | |
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19 | my $number = sub { Scalar::Util::looks_like_number($_[0]) }; |
20 | |
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21 | my $decimal = sub { $_[0] =~ /^ [-+]? \d+ (?:\.\d*)? \z/x }; |
22 | |
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23 | my %noquote = ( |
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24 | int => sub { $_[0] =~ /^ [-+]? \d+ \z/x }, |
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25 | bit => => sub { $_[0] =~ /^[01]\z/ }, |
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26 | money => sub { $_[0] =~ /^\$ \d+ (?:\.\d*)? \z/x }, |
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27 | float => $number, |
28 | real => $number, |
29 | double => $number, |
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30 | decimal => $decimal, |
31 | numeric => $decimal, |
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32 | ); |
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33 | |
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34 | sub should_quote_value { |
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35 | my $self = shift; |
36 | my ($type, $value) = @_; |
37 | |
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38 | return $self->next::method(@_) if not defined $value or not defined $type; |
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39 | |
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40 | if (my $key = List::Util::first { $type =~ /$_/i } keys %noquote) { |
41 | return 0 if $noquote{$key}->($value); |
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42 | } elsif ($self->is_datatype_numeric($type) && $number->($value)) { |
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43 | return 0; |
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44 | } |
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45 | |
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46 | ## try to guess based on value |
47 | # elsif (not $type) { |
48 | # return 0 if $number->($value) || $noquote->{money}->($value); |
49 | # } |
50 | |
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51 | return $self->next::method(@_); |
52 | } |
53 | |
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54 | 1; |
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55 | |
56 | =head1 NAME |
57 | |
58 | DBIx::Class::Storage::DBI::Sybase::NoBindVars - Storage::DBI subclass for Sybase |
59 | without placeholder support |
60 | |
61 | =head1 DESCRIPTION |
62 | |
63 | If you're using this driver than your version of Sybase does not support |
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64 | placeholders, or your version of L<DBD::Sybase> was compiled with FreeTDS rather |
65 | than the Sybase OpenClient libraries. You can check with: |
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66 | |
67 | $dbh->{syb_dynamic_supported} |
68 | |
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69 | To see if you are using FreeTDS, run: |
70 | |
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71 | perl -MDBI -le 'my $dbh = DBI->connect($dsn, $user, $pass); print $dbh->{syb_oc_version}' |
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72 | |
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73 | You will get a warning on startup if you're using FreeTDS in any case. |
74 | |
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75 | You can also enable this driver explicitly using: |
76 | |
77 | my $schema = SchemaClass->clone; |
78 | $schema->storage_type('::DBI::Sybase::NoBindVars'); |
79 | $schema->connect($dsn, $user, $pass, \%opts); |
80 | |
81 | See the discussion in L<< DBD::Sybase/Using ? Placeholders & bind parameters to |
82 | $sth->execute >> for details on the pros and cons of using placeholders. |
83 | |
84 | One advantage of not using placeholders is that C<select @@identity> will work |
85 | for obtainging the last insert id of an C<IDENTITY> column, instead of having to |
86 | do C<select max(col)> as the base Sybase driver does. |
87 | |
88 | When using this driver, bind variables will be interpolated (properly quoted of |
89 | course) into the SQL query itself, without using placeholders. |
90 | |
91 | The caching of prepared statements is also explicitly disabled, as the |
92 | interpolation renders it useless. |
93 | |
94 | =head1 AUTHORS |
95 | |
96 | See L<DBIx::Class/CONTRIBUTORS>. |
97 | |
98 | =head1 LICENSE |
99 | |
100 | You may distribute this code under the same terms as Perl itself. |
101 | |
102 | =cut |
103 | # vim:sts=2 sw=2: |