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1 | package DBIx::Class::Storage::DBI::Sybase::ASE::NoBindVars; |
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2 | |
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3 | use warnings; |
4 | use strict; |
5 | |
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6 | use base qw/ |
7 | DBIx::Class::Storage::DBI::NoBindVars |
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8 | DBIx::Class::Storage::DBI::Sybase::ASE |
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9 | /; |
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10 | use mro 'c3'; |
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11 | use List::Util 'first'; |
12 | use Scalar::Util 'looks_like_number'; |
13 | use namespace::clean; |
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14 | |
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15 | sub _init { |
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16 | my $self = shift; |
17 | $self->disable_sth_caching(1); |
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18 | $self->_identity_method('@@IDENTITY'); |
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19 | $self->next::method (@_); |
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20 | } |
21 | |
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22 | sub _fetch_identity_sql { 'SELECT ' . $_[0]->_identity_method } |
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23 | |
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24 | my $number = sub { looks_like_number $_[0] }; |
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25 | |
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26 | my $decimal = sub { $_[0] =~ /^ [-+]? \d+ (?:\.\d*)? \z/x }; |
27 | |
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28 | my %noquote = ( |
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29 | int => sub { $_[0] =~ /^ [-+]? \d+ \z/x }, |
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30 | bit => => sub { $_[0] =~ /^[01]\z/ }, |
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31 | money => sub { $_[0] =~ /^\$ \d+ (?:\.\d*)? \z/x }, |
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32 | float => $number, |
33 | real => $number, |
34 | double => $number, |
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35 | decimal => $decimal, |
36 | numeric => $decimal, |
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37 | ); |
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38 | |
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39 | sub interpolate_unquoted { |
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40 | my $self = shift; |
41 | my ($type, $value) = @_; |
42 | |
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43 | return $self->next::method(@_) if not defined $value or not defined $type; |
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44 | |
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45 | if (my $key = first { $type =~ /$_/i } keys %noquote) { |
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46 | return 1 if $noquote{$key}->($value); |
47 | } |
48 | elsif ($self->is_datatype_numeric($type) && $number->($value)) { |
49 | return 1; |
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50 | } |
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51 | |
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52 | return $self->next::method(@_); |
53 | } |
54 | |
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55 | sub _prep_interpolated_value { |
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56 | my ($self, $type, $value) = @_; |
57 | |
58 | if ($type =~ /money/i && defined $value) { |
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59 | # change a ^ not followed by \$ to a \$ |
60 | $value =~ s/^ (?! \$) /\$/x; |
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61 | } |
62 | |
63 | return $value; |
64 | } |
65 | |
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66 | 1; |
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67 | |
68 | =head1 NAME |
69 | |
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70 | DBIx::Class::Storage::DBI::Sybase::ASE::NoBindVars - Storage::DBI subclass for |
71 | Sybase ASE without placeholder support |
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72 | |
73 | =head1 DESCRIPTION |
74 | |
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75 | If you're using this driver then your version of Sybase or the libraries you |
76 | use to connect to it do not support placeholders. |
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77 | |
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78 | You can also enable this driver explicitly using: |
79 | |
80 | my $schema = SchemaClass->clone; |
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81 | $schema->storage_type('::DBI::Sybase::ASE::NoBindVars'); |
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82 | $schema->connect($dsn, $user, $pass, \%opts); |
83 | |
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84 | See the discussion in |
85 | L<< DBD::Sybase/Using ? Placeholders & bind parameters to $sth->execute >> |
86 | for details on the pros and cons of using placeholders with this particular |
87 | driver. |
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88 | |
89 | One advantage of not using placeholders is that C<select @@identity> will work |
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90 | for obtaining the last insert id of an C<IDENTITY> column, instead of having to |
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91 | do C<select max(col)> in a transaction as the base Sybase driver does. |
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92 | |
93 | When using this driver, bind variables will be interpolated (properly quoted of |
94 | course) into the SQL query itself, without using placeholders. |
95 | |
96 | The caching of prepared statements is also explicitly disabled, as the |
97 | interpolation renders it useless. |
98 | |
99 | =head1 AUTHORS |
100 | |
101 | See L<DBIx::Class/CONTRIBUTORS>. |
102 | |
103 | =head1 LICENSE |
104 | |
105 | You may distribute this code under the same terms as Perl itself. |
106 | |
107 | =cut |
108 | # vim:sts=2 sw=2: |