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ILMARI / SQL-Translator-0.11020_02 / lib / SQL / Translator / Parser / DBI / Oracle.pm 

            

              
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package SQL::Translator::Parser::DBI::Oracle;
=head1 NAME
SQL::Translator::Parser::DBI::Oracle - parser for DBD::Oracle
=head1 SYNOPSIS
See SQL::Translator::Parser::DBI.
=head1 DESCRIPTION
Uses DBI introspection methods to determine schema details.
=cut
use strict;
use warnings;
use DBI;
use SQL::Translator::Schema::Constants;
use SQL::Translator::Schema::Table;
use SQL::Translator::Schema::Field;
use SQL::Translator::Schema::Constraint;
our $VERSION = '1.59';
sub parse {
    my ( $tr, $dbh ) = @_;
    my $schema = $tr->schema;
    my $db_user = uc $tr->parser_args()->{db_user};
    my $sth = $dbh->table_info(undef, $db_user, '%', 'TABLE');
    while(my $table_info = $sth->fetchrow_hashref('NAME_uc')) {
        next if ($table_info->{TABLE_NAME} =~ /\$/);
        # create the table
        my $table = $schema->add_table(
            name => $table_info->{TABLE_NAME},
            type => $table_info->{TABLE_TYPE},
        );
        # add the fields (columns) for this table
        my $sth;
        $sth = $dbh->column_info(
            undef,
            $table_info->{TABLE_SCHEM},
            $table_info->{TABLE_NAME},
            '%'
        );
        while(my $column = $sth->fetchrow_hashref('NAME_uc')) {
            my $f = $table->add_field(
                name          => $column->{COLUMN_NAME},
                default_value => $column->{COLUMN_DEF},
                data_type     => $column->{TYPE_NAME},
                order         => $column->{ORDINAL_POSITION},
                size          => $column->{COLUMN_SIZE},
            ) || die $table->error;
            $f->is_nullable( $column->{NULLABLE} == 1 );
        }
        # add the primary key info
        $sth = $dbh->primary_key_info(
            undef,
            $table_info->{TABLE_SCHEM},
            $table_info->{TABLE_NAME},
        );
        while(my $primary_key = $sth->fetchrow_hashref('NAME_uc')) {
            my $f = $table->get_field( $primary_key->{COLUMN_NAME} );
            $f->is_primary_key(1);
        }
        # add the foreign key info (constraints)
        $sth = $dbh->foreign_key_info(
            undef,
            undef,
            undef,
            undef,
            $table_info->{TABLE_SCHEM},
            $table_info->{TABLE_NAME},
        );
        my $cons = {};
        while(my $foreign_key = $sth->fetchrow_hashref('NAME_uc')) {
            my $name = $foreign_key->{FK_NAME};
            $cons->{$name}->{reference_table} = $foreign_key->{UK_TABLE_NAME};
            push @{ $cons->{$name}->{fields} },
                $foreign_key->{FK_COLUMN_NAME};
            push @{ $cons->{$name}->{reference_fields} },
                $foreign_key->{UK_COLUMN_NAME};
        }
        for my $name ( keys %$cons ) {
            my $c = $table->add_constraint(
                type             => FOREIGN_KEY,
                name             => $name,
                fields           => $cons->{$name}->{fields},
                reference_fields => $cons->{$name}->{reference_fields},
                reference_table  => $cons->{$name}->{reference_table},
            ) || die $table->error;
        }
    }
    return 1;
}
1;
=pod
=head1 AUTHOR
Earl Cahill E<lt>cpan@spack.netE<gt>.
=head1 ACKNOWLEDGEMENT
Initial revision of this module came almost entirely from work done by
Todd Hepler E<lt>thepler@freeshell.orgE<gt>.  My changes were
quite minor (ensuring NAME_uc, changing a couple variable names,
skipping tables with a $ in them).
Todd claimed his work to be an almost verbatim copy of
SQL::Translator::Parser::DBI::PostgreSQL revision 1.7
For me, the real work happens in DBD::Oracle and DBI, which, also
for me, that is the beauty of having introspection methods in DBI.
=head1 SEE ALSO
SQL::Translator, DBD::Oracle.
=cut