package DBIx::Class::Schema::Loader::DBI::Pg;
use strict;
use warnings;
use base qw/
DBIx::Class::Schema::Loader::DBI::Component::QuotedDefault
DBIx::Class::Schema::Loader::DBI
/;
use Carp::Clan qw/^DBIx::Class/;
use Class::C3;
our $VERSION = '0.05003';
=head1 NAME
DBIx::Class::Schema::Loader::DBI::Pg - DBIx::Class::Schema::Loader::DBI
PostgreSQL Implementation.
=head1 SYNOPSIS
package My::Schema;
use base qw/DBIx::Class::Schema::Loader/;
__PACKAGE__->loader_options( debug => 1 );
1;
=head1 DESCRIPTION
See L<DBIx::Class::Schema::Loader::Base>.
=cut
sub _setup {
my $self = shift;
$self->next::method(@_);
$self->{db_schema} ||= 'public';
}
sub _table_uniq_info {
my ($self, $table) = @_;
return $self->next::method($table)
if $DBD::Pg::VERSION >= 1.50;
my @uniqs;
my $dbh = $self->schema->storage->dbh;
my $attr_sth = $self->{_cache}->{pg_attr_sth} ||= $dbh->prepare(
q{SELECT attname FROM pg_catalog.pg_attribute
WHERE attrelid = ? AND attnum = ?}
);
my $uniq_sth = $self->{_cache}->{pg_uniq_sth} ||= $dbh->prepare(
q{SELECT x.indrelid, i.relname, x.indkey
FROM
pg_catalog.pg_index x
JOIN pg_catalog.pg_class c ON c.oid = x.indrelid
JOIN pg_catalog.pg_class i ON i.oid = x.indexrelid
JOIN pg_catalog.pg_constraint con ON con.conname = i.relname
LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
WHERE
x.indisunique = 't' AND
c.relkind = 'r' AND
i.relkind = 'i' AND
con.contype = 'u' AND
n.nspname = ? AND
c.relname = ?}
);
$uniq_sth->execute($self->db_schema, $table);
while(my $row = $uniq_sth->fetchrow_arrayref) {
my ($tableid, $indexname, $col_nums) = @$row;
$col_nums =~ s/^\s+//;
my @col_nums = split(/\s+/, $col_nums);
my @col_names;
foreach (@col_nums) {
$attr_sth->execute($tableid, $_);
my $name_aref = $attr_sth->fetchrow_arrayref;
push(@col_names, $name_aref->[0]) if $name_aref;
}
if(!@col_names) {
warn "Failed to parse UNIQUE constraint $indexname on $table";
}
else {
push(@uniqs, [ $indexname => \@col_names ]);
}
}
return \@uniqs;
}
sub _table_comment {
my ( $self, $table ) = @_;
my ($table_comment) = $self->schema->storage->dbh->selectrow_array(
q{SELECT obj_description(oid)
FROM pg_class
WHERE relname=? AND relnamespace=(
SELECT oid FROM pg_namespace WHERE nspname=?)
}, undef, $table, $self->db_schema
);
return $table_comment
}
sub _column_comment {
my ( $self, $table, $column_number ) = @_;
my ($table_oid) = $self->schema->storage->dbh->selectrow_array(
q{SELECT oid
FROM pg_class
WHERE relname=? AND relnamespace=(
SELECT oid FROM pg_namespace WHERE nspname=?)
}, undef, $table, $self->db_schema
);
return $self->schema->storage->dbh->selectrow_array('SELECT col_description(?,?)', undef, $table_oid,
$column_number );
}
sub _columns_info_for {
my $self = shift;
my ($table) = @_;
my $result = $self->next::method(@_);
foreach my $col (keys %$result) {
my $data_type = $result->{$col}{data_type};
if ($data_type =~
/^(?:bigint|int8|bigserial|serial8|bit|boolean|bool|box|bytea|cidr|circle|date|double precision|float8|inet|integer|int|int4|line|lseg|macaddr|money|path|point|polygon|real|float4|smallint|int2|serial|serial4|text)\z/i) {
delete $result->{$col}{size};
}
elsif ($data_type =~ /^(?:interval|time|timestamp)\b/i) {
my ($precision) = $self->schema->storage->dbh
->selectrow_array(<<EOF, {}, $table, $col);
SELECT datetime_precision
FROM information_schema.columns
WHERE table_name = ? and column_name = ?
EOF
if ($data_type =~ /^time\b/i) {
if ((not $precision) || $precision !~ /^\d/) {
delete $result->{$col}{size};
}
else {
my ($integer_datetimes) = $self->schema->storage->dbh
->selectrow_array('show integer_datetimes');
my $max_precision =
$integer_datetimes =~ /^on\z/i ? 6 : 10;
if ($precision == $max_precision) {
delete $result->{$col}{size};
}
else {
$result->{$col}{size} = $precision;
}
}
}
elsif ((not $precision) || $precision !~ /^\d/ || $precision == 6) {
delete $result->{$col}{size};
}
else {
$result->{$col}{size} = $precision;
}
}
elsif ($data_type =~ /^(?:bit varying|varbit)\z/i) {
my ($precision) = $self->schema->storage->dbh
->selectrow_array(<<EOF, {}, $table, $col);
SELECT character_maximum_length
FROM information_schema.columns
WHERE table_name = ? and column_name = ?
EOF
$result->{$col}{size} = $precision;
}
elsif ($data_type =~ /^(?:numeric|decimal)\z/i) {
my $size = $result->{$col}{size};
$size =~ s/\s*//g;
my ($scale, $precision) = split /,/, $size;
$result->{$col}{size} = [ $precision, $scale ];
}
}
return $result;
}
sub _extra_column_info {
my ($self, $info) = @_;
my %extra_info;
if ($info->{COLUMN_DEF} && $info->{COLUMN_DEF} =~ /\bnextval\(/i) {
$extra_info{is_auto_increment} = 1;
}
return \%extra_info;
}
=head1 SEE ALSO
L<DBIx::Class::Schema::Loader>, L<DBIx::Class::Schema::Loader::Base>,
L<DBIx::Class::Schema::Loader::DBI>
=head1 AUTHOR
See L<DBIx::Class::Schema::Loader/AUTHOR> and L<DBIx::Class::Schema::Loader/CONTRIBUTORS>.
=head1 LICENSE
This library is free software; you can redistribute it and/or modify it under
the same terms as Perl itself.
=cut
1;