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1 | package SQL::Translator::Parser::DBI::PostgreSQL; |
2 | |
3 | # ------------------------------------------------------------------- |
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4 | # Copyright (C) 2002-2009 SQLFairy Authors |
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5 | # |
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. |
9 | # |
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. |
14 | # |
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 |
18 | # 02111-1307 USA |
19 | # ------------------------------------------------------------------- |
20 | |
21 | =head1 NAME |
22 | |
23 | SQL::Translator::Parser::DBI::PostgreSQL - parser for DBD::Pg |
24 | |
25 | =head1 SYNOPSIS |
26 | |
27 | See SQL::Translator::Parser::DBI. |
28 | |
29 | =head1 DESCRIPTION |
30 | |
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31 | Uses DBI to query PostgreSQL system tables to determine schema structure. |
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32 | |
33 | =cut |
34 | |
35 | use strict; |
36 | use DBI; |
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37 | use Data::Dumper; |
38 | use SQL::Translator::Schema::Constants; |
39 | |
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40 | use vars qw[ $DEBUG $VERSION @EXPORT_OK ]; |
41 | $VERSION = '1.99'; |
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42 | $DEBUG = 0 unless defined $DEBUG; |
43 | |
44 | # ------------------------------------------------------------------- |
45 | sub parse { |
46 | my ( $tr, $dbh ) = @_; |
47 | |
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48 | my $schema = $tr->schema; |
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49 | |
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50 | my $column_select = $dbh->prepare( |
51 | "SELECT a.attname, t.typname, a.attnum,a.atttypmod as length, |
52 | a.attnotnull, a.atthasdef, d.adsrc |
53 | FROM pg_type t,pg_attribute a |
54 | LEFT JOIN pg_attrdef d ON (d.adrelid = a.attrelid AND a.attnum = d.adnum) |
55 | WHERE a.attrelid=? AND attnum>0 |
56 | AND a.atttypid=t.oid |
57 | ORDER BY a.attnum" |
58 | ); |
59 | |
60 | my $index_select = $dbh->prepare( |
61 | "SELECT oid, c.relname, i.indkey, i.indnatts, i.indisunique, |
62 | i.indisprimary, pg_get_indexdef(oid) AS create_string |
63 | FROM pg_class c,pg_index i |
64 | WHERE c.relnamespace=2200 AND c.relkind='i' |
65 | AND c.oid=i.indexrelid AND i.indrelid=?" |
66 | ); |
67 | |
68 | my $table_select = $dbh->prepare( |
69 | "SELECT oid,relname FROM pg_class WHERE relnamespace IN |
70 | (SELECT oid FROM pg_namespace WHERE nspname='public') |
71 | AND relkind='r';" |
72 | ); |
73 | $table_select->execute(); |
74 | |
75 | while ( my $tablehash = $table_select->fetchrow_hashref ) { |
76 | |
77 | my $table_name = $$tablehash{'relname'}; |
78 | my $table_oid = $$tablehash{'oid'}; |
79 | |
80 | my $table = $schema->add_table( |
81 | name => $table_name, |
82 | #what is type? type => $table_info->{TABLE_TYPE}, |
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83 | ) || die $schema->error; |
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84 | |
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85 | $column_select->execute($table_oid); |
86 | |
87 | while (my $columnhash = $column_select->fetchrow_hashref ) { |
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88 | |
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89 | #data_type seems to not be populated; perhaps there needs to |
90 | #be a mapping of query output to reserved constants in sqlt? |
91 | |
92 | my $col = $table->add_field( |
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93 | name => $$columnhash{'attname'}, |
94 | default_value => $$columnhash{'adsrc'}, |
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95 | data_type => $$columnhash{'typname'}, |
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96 | order => $$columnhash{'attnum'}, |
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97 | ) || die $table->error; |
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98 | |
99 | $col->{size} = [$$columnhash{'length'}] if $$columnhash{'length'}>0; |
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100 | $col->{is_nullable} = $$columnhash{'attnotnull'} ? 0 : 1; |
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101 | } |
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102 | |
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103 | $index_select->execute($table_oid); |
104 | |
105 | my @column_names = $table->field_names(); |
106 | while (my $indexhash = $index_select->fetchrow_hashref ) { |
107 | #don't deal with function indexes at the moment |
108 | next if ($$indexhash{'indkey'} eq '' |
109 | or !defined($$indexhash{'indkey'}) ); |
110 | |
111 | my $type; |
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112 | if ($$indexhash{'indisprimary'}) { |
113 | $type = UNIQUE; #PRIMARY_KEY; |
114 | |
115 | #tell sqlt that this is the primary key: |
116 | my $col_name=$column_names[($$indexhash{'indkey'} - 1)]; |
117 | $table->get_field($col_name)->{is_primary_key}=1; |
118 | |
119 | } elsif ($$indexhash{'indisunique'}) { |
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120 | $type = UNIQUE; |
121 | } else { |
122 | $type = NORMAL; |
123 | } |
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124 | |
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125 | my @column_ids = split /\s+/, $$indexhash{'indkey'}; |
126 | my @columns; |
127 | foreach my $col (@column_ids) { |
128 | push @columns, $column_names[($col - 1)]; |
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129 | } |
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130 | |
131 | $table->add_index( |
132 | name => $$indexhash{'relname'}, |
133 | type => $type, |
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134 | fields => \@columns, |
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135 | ) || die $table->error; |
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136 | } |
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137 | } |
138 | |
139 | return 1; |
140 | } |
141 | |
142 | 1; |
143 | |
144 | # ------------------------------------------------------------------- |
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145 | # Time is a waste of money. |
146 | # Oscar Wilde |
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147 | # ------------------------------------------------------------------- |
148 | |
149 | =pod |
150 | |
151 | =head1 AUTHOR |
152 | |
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153 | Scott Cain E<lt>cain@cshl.eduE<gt>, previous author: |
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154 | Paul Harrington E<lt>harringp@deshaw.comE<gt>. |
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155 | |
156 | =head1 SEE ALSO |
157 | |
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158 | SQL::Translator, DBD::Pg. |
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159 | |
160 | =cut |