1 package SQL::Translator::Producer;
3 # -------------------------------------------------------------------
4 # Copyright (C) 2002-4 SQLFairy Authors
6 # This program is free software; you can redistribute it and/or
7 # modify it under the terms of the GNU General Public License as
8 # published by the Free Software Foundation; version 2.
10 # This program is distributed in the hope that it will be useful, but
11 # WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 # General Public License for more details.
15 # You should have received a copy of the GNU General Public License
16 # along with this program; if not, write to the Free Software
17 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 # -------------------------------------------------------------------
22 use vars qw($VERSION);
28 # Do not rely on this if you are not bundled with SQL::Translator.
30 ## $exceptions contains an arrayref of paired values
31 ## Each pair contains a pattern match or string, and a value to be used as
32 ## the default if matched.
33 ## They are special per Producer, and provide support for the old 'now()'
34 ## default value exceptions
35 sub _apply_default_value {
36 my (undef, $field, $field_ref, $exceptions) = @_;
37 my $default = $field->default_value;
38 return if !defined $default;
40 if ($exceptions and ! ref $default) {
41 for (my $i = 0; $i < @$exceptions; $i += 2) {
42 my ($pat, $val) = @$exceptions[ $i, $i + 1 ];
43 if (ref $pat and $default =~ $pat) {
46 } elsif (lc $default eq lc $pat) {
53 my $type = lc $field->data_type;
54 my $is_numeric_datatype = ($type =~ /^(?:(?:big|medium|small|tiny)?int(?:eger)?|decimal|double|float|num(?:ber|eric)?|real)$/);
57 $$field_ref .= " DEFAULT $$default";
58 } elsif ($is_numeric_datatype && Scalar::Util::looks_like_number ($default) ) {
59 # we need to check the data itself in addition to the datatype, for basic safety
60 $$field_ref .= " DEFAULT $default";
62 $$field_ref .= " DEFAULT '$default'";
69 # -------------------------------------------------------------------
70 # A burnt child loves the fire.
72 # -------------------------------------------------------------------
78 SQL::Translator::Producer - describes how to write a producer
82 Producer modules designed to be used with SQL::Translator need to
83 implement a single function, called B<produce>. B<produce> will be
84 called with the SQL::Translator object from which it is expected to
85 retrieve the SQL::Translator::Schema object which has been populated
86 by the parser. It is expected to return a string.
94 =item create_table($table)
96 =item create_field($field)
98 =item create_view($view)
100 =item create_index($index)
102 =item create_constraint($constraint)
104 =item create_trigger($trigger)
106 =item alter_field($from_field, $to_field)
108 =item add_field($table, $new_field)
110 =item drop_field($table, $old_field)
116 Darren Chamberlain E<lt>darren@cpan.orgE<gt>,
117 Ken Y. Clark E<lt>kclark@cpan.orgE<gt>.
121 perl(1), SQL::Translator, SQL::Translator::Schema.