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1 | package DBIx::Class::Storage::DBI::NoBindVars; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | |
6 | use base 'DBIx::Class::Storage::DBI'; |
7 | |
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8 | =head1 NAME |
9 | |
10 | DBIx::Class::Storage::DBI::NoBindVars - Sometime DBDs have poor to no support for bind variables |
11 | |
12 | =head1 DESCRIPTION |
13 | |
14 | This class allows queries to work when the DBD or underlying library does not |
15 | support the usual C<?> placeholders, or at least doesn't support them very |
16 | well, as is the case with L<DBD::Sybase> |
17 | |
18 | =head1 METHODS |
19 | |
20 | =head2 sth |
21 | |
22 | Uses C<prepare> instead of the usual C<prepare_cached>, seeing as we can't cache very effectively without bind variables. |
23 | |
24 | =cut |
25 | |
26 | sub sth { |
27 | my ($self, $sql) = @_; |
28 | return $self->dbh->prepare($sql); |
29 | } |
30 | |
31 | =head2 _execute |
32 | |
33 | Manually subs in the values for the usual C<?> placeholders before calling L</sth> on the generated SQL. |
34 | |
35 | =cut |
36 | |
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37 | sub _execute { |
38 | my ($self, $op, $extra_bind, $ident, @args) = @_; |
39 | my ($sql, @bind) = $self->sql_maker->$op($ident, @args); |
40 | unshift(@bind, @$extra_bind) if $extra_bind; |
41 | if ($self->debug) { |
42 | my @debug_bind = map { defined $_ ? qq{'$_'} : q{'NULL'} } @bind; |
43 | $self->debugobj->query_start($sql, @debug_bind); |
44 | } |
45 | |
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46 | $sql =~ s/\?/$self->_dbh->quote(shift(@bind))/eg; |
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47 | |
48 | my $sth = eval { $self->sth($sql,$op) }; |
49 | |
50 | if (!$sth || $@) { |
51 | $self->throw_exception( |
52 | 'no sth generated via sql (' . ($@ || $self->_dbh->errstr) . "): $sql" |
53 | ); |
54 | } |
55 | |
56 | my $rv; |
57 | if ($sth) { |
58 | my $time = time(); |
59 | $rv = eval { $sth->execute }; |
60 | |
61 | if ($@ || !$rv) { |
62 | $self->throw_exception("Error executing '$sql': ".($@ || $sth->errstr)); |
63 | } |
64 | } else { |
65 | $self->throw_exception("'$sql' did not generate a statement."); |
66 | } |
67 | if ($self->debug) { |
68 | my @debug_bind = map { defined $_ ? qq{`$_'} : q{`NULL'} } @bind; |
69 | $self->debugobj->query_end($sql, @debug_bind); |
70 | } |
71 | return (wantarray ? ($rv, $sth, @bind) : $rv); |
72 | } |
73 | |
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74 | =head1 AUTHORS |
75 | |
76 | Brandon Black <blblack@gmail.com> |
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77 | |
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78 | Trym Skaar <trym@tryms.no> |
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79 | |
80 | =head1 LICENSE |
81 | |
82 | You may distribute this code under the same terms as Perl itself. |
83 | |
84 | =cut |
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85 | |
86 | 1; |