1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
|
package SQL::Translator::Producer;
use strict;
use warnings;
use Scalar::Util ();
our $VERSION = '1.59';
sub produce { "" }
# Do not rely on this if you are not bundled with SQL::Translator.
# -- rjbs, 2008-09-30
## $exceptions contains an arrayref of paired values
## Each pair contains a pattern match or string, and a value to be used as
## the default if matched.
## They are special per Producer, and provide support for the old 'now()'
## default value exceptions
sub _apply_default_value {
my ($self, $field, $field_ref, $exceptions) = @_;
my $default = $field->default_value;
return if !defined $default;
if ($exceptions and ! ref $default) {
for (my $i = 0; $i < @$exceptions; $i += 2) {
my ($pat, $val) = @$exceptions[ $i, $i + 1 ];
if (ref $pat and $default =~ $pat) {
$default = $val;
last;
} elsif (lc $default eq lc $pat) {
$default = $val;
last
}
}
}
my $type = lc $field->data_type;
my $is_numeric_datatype = ($type =~ /^(?:(?:big|medium|small|tiny)?int(?:eger)?|decimal|double|float|num(?:ber|eric)?|real)$/);
if (ref $default) {
$$field_ref .= " DEFAULT $$default";
} elsif ($is_numeric_datatype && Scalar::Util::looks_like_number ($default) ) {
# we need to check the data itself in addition to the datatype, for basic safety
$$field_ref .= " DEFAULT $default";
} else {
$default = $self->_quote_string($default);
$$field_ref .= " DEFAULT $default";
}
}
sub _quote_string {
my ($self, $string) = @_;
$string =~ s/'/''/g;
return qq{'$string'};
}
1;
# -------------------------------------------------------------------
# A burnt child loves the fire.
# Oscar Wilde
# -------------------------------------------------------------------
=pod
=head1 NAME
SQL::Translator::Producer - describes how to write a producer
=head1 DESCRIPTION
Producer modules designed to be used with SQL::Translator need to
implement a single function, called B<produce>. B<produce> will be
called with the SQL::Translator object from which it is expected to
retrieve the SQL::Translator::Schema object which has been populated
by the parser. It is expected to return a string.
=head1 METHODS
=over 4
=item produce
=item create_table($table)
=item create_field($field)
=item create_view($view)
=item create_index($index)
=item create_constraint($constraint)
=item create_trigger($trigger)
=item alter_field($from_field, $to_field)
=item add_field($table, $new_field)
=item drop_field($table, $old_field)
=back
=head1 AUTHORS
Darren Chamberlain E<lt>darren@cpan.orgE<gt>,
Ken Y. Clark E<lt>kclark@cpan.orgE<gt>.
=head1 SEE ALSO
perl(1), SQL::Translator, SQL::Translator::Schema.
=cut
|
