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