is_auto_increment for Firebird, refactor _extra_column_info

[dbsrgits/DBIx-Class-Schema-Loader.git] / lib / DBIx / Class / Schema / Loader / DBI / InterBase.pm

package DBIx::Class::Schema::Loader::DBI::InterBase;

use strict;
use warnings;
use Class::C3;
use base qw/DBIx::Class::Schema::Loader::DBI/;
use Carp::Clan qw/^DBIx::Class/;

our $VERSION = '0.05003';

=head1 NAME

DBIx::Class::Schema::Loader::DBI::InterBase - DBIx::Class::Schema::Loader::DBI
Firebird Implementation.

=head1 DESCRIPTION

See L<DBIx::Class::Schema::Loader::Base>.

=cut

sub _table_pk_info {
    my ($self, $table) = @_;

    my $dbh = $self->schema->storage->dbh;
    my $sth = $dbh->prepare(<<'EOF');
SELECT iseg.rdb$field_name
FROM rdb$relation_constraints rc
JOIN rdb$index_segments iseg ON rc.rdb$index_name = iseg.rdb$index_name
WHERE rc.rdb$constraint_type = 'PRIMARY KEY' and rc.rdb$relation_name = ?
ORDER BY iseg.rdb$field_position
EOF
    $sth->execute($table);

    my @keydata;

    while (my ($col) = $sth->fetchrow_array) {
        s/^\s+//, s/\s+\z// for $col;

        push @keydata, lc $col;
    }

    return \@keydata;
}

sub _table_fk_info {
    my ($self, $table) = @_;

    my ($local_cols, $remote_cols, $remote_table, @rels);
    my $dbh = $self->schema->storage->dbh;
    my $sth = $dbh->prepare(<<'EOF');
SELECT rc.rdb$constraint_name fk, iseg.rdb$field_name local_col, ri.rdb$relation_name remote_tab, riseg.rdb$field_name remote_col
FROM rdb$relation_constraints rc
JOIN rdb$index_segments iseg ON rc.rdb$index_name = iseg.rdb$index_name
JOIN rdb$indices li ON rc.rdb$index_name = li.rdb$index_name
JOIN rdb$indices ri ON li.rdb$foreign_key = ri.rdb$index_name
JOIN rdb$index_segments riseg ON iseg.rdb$field_position = riseg.rdb$field_position and ri.rdb$index_name = riseg.rdb$index_name
WHERE rc.rdb$constraint_type = 'FOREIGN KEY' and rc.rdb$relation_name = ?
ORDER BY iseg.rdb$field_position
EOF
    $sth->execute($table);

    while (my ($fk, $local_col, $remote_tab, $remote_col) = $sth->fetchrow_array) {
        s/^\s+//, s/\s+\z// for $fk, $local_col, $remote_tab, $remote_col;

        push @{$local_cols->{$fk}},  lc $local_col;
        push @{$remote_cols->{$fk}}, lc $remote_col;
        $remote_table->{$fk} = $remote_tab;
    }

    foreach my $fk (keys %$remote_table) {
        push @rels, {
            local_columns => $local_cols->{$fk},
            remote_columns => $remote_cols->{$fk},
            remote_table => $remote_table->{$fk},
        };
    }
    return \@rels;
}

sub _table_uniq_info {
    my ($self, $table) = @_;

    my $dbh = $self->schema->storage->dbh;
    my $sth = $dbh->prepare(<<'EOF');
SELECT rc.rdb$constraint_name, iseg.rdb$field_name
FROM rdb$relation_constraints rc
JOIN rdb$index_segments iseg ON rc.rdb$index_name = iseg.rdb$index_name
WHERE rc.rdb$constraint_type = 'UNIQUE' and rc.rdb$relation_name = ?
ORDER BY iseg.rdb$field_position
EOF
    $sth->execute($table);

    my $constraints;
    while (my ($constraint_name, $column) = $sth->fetchrow_array) {
        s/^\s+//, s/\s+\z// for $constraint_name, $column;

        push @{$constraints->{$constraint_name}}, lc $column;
    }

    my @uniqs = map { [ $_ => $constraints->{$_} ] } keys %$constraints;
    return \@uniqs;
}

sub _extra_column_info {
    my ($self, $table, $column, $info, $dbi_info) = @_;
    my %extra_info;

    my $dbh = $self->schema->storage->dbh;

    local $dbh->{LongReadLen} = 100000;
    local $dbh->{LongTruncOk} = 1;

    my $sth = $dbh->prepare(<<'EOF');
SELECT t.rdb$trigger_source
FROM rdb$triggers t
WHERE t.rdb$relation_name = ?
EOF

    $sth->execute($table);

    while (my ($trigger) = $sth->fetchrow_array) {
        my ($trig_col, $generator) = $trigger =~
/new\s*.\s*(\w+) \s* = \s* gen_id\s* \( \s* (\w+)/ix;

        if ($trig_col eq $column) {
            $extra_info{is_auto_increment} = 1;
            $extra_info{sequence}          = $generator;
        }
    }

    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;