--- /dev/null
+package SQL::Translator::Parser::PostGreSQL;
+
+# -------------------------------------------------------------------
+# $Id: PostGreSQL.pm,v 1.1 2003-02-21 08:42:29 allenday Exp $
+# -------------------------------------------------------------------
+# Copyright (C) 2003 Ken Y. Clark <kclark@cpan.org>,
+# darren chamberlain <darren@cpan.org>,
+# Chris Mungall <cjm@fruitfly.org>
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; version 2.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+# 02111-1307 USA
+# -------------------------------------------------------------------
+
+=head1 NAME
+
+SQL::Translator::Parser::PostGreSQL - parser for PostGreSQL
+
+=head1 SYNOPSIS
+
+ use SQL::Translator;
+ use SQL::Translator::Parser::PostGreSQL;
+
+ my $translator = SQL::Translator->new;
+ $translator->parser("SQL::Translator::Parser::PostGreSQL");
+
+=head1 DESCRIPTION
+
+The grammar is influenced heavily by Tim Bunce's "mysql2ora" grammar.
+
+=cut
+
+use strict;
+use vars qw[ $DEBUG $VERSION $GRAMMAR @EXPORT_OK ];
+$VERSION = sprintf "%d.%02d", q$Revision: 1.1 $ =~ /(\d+)\.(\d+)/;
+$DEBUG = 0 unless defined $DEBUG;
+
+use Data::Dumper;
+use Parse::RecDescent;
+use Exporter;
+use base qw(Exporter);
+
+@EXPORT_OK = qw(parse);
+
+# Enable warnings within the Parse::RecDescent module.
+$::RD_ERRORS = 1; # Make sure the parser dies when it encounters an error
+$::RD_WARN = 1; # Enable warnings. This will warn on unused rules &c.
+$::RD_HINT = 1; # Give out hints to help fix problems.
+
+my $parser; # should we do this? There's no programmic way to
+ # change the grammar, so I think this is safe.
+
+$GRAMMAR = q!
+
+{ our ( %tables, $table_order ) }
+
+startrule : statement(s) { \%tables }
+
+statement : comment
+ | drop
+ | create
+ | <error>
+
+drop : /drop/i WORD(s) ';'
+
+create : create_table table_name '(' comment(s?) create_definition(s /,/) ')' table_option(s?) ';'
+ {
+ my $table_name = $item{'table_name'};
+ $tables{ $table_name }{'order'} = ++$table_order;
+ $tables{ $table_name }{'table_name'} = $table_name;
+
+ my $i = 1;
+ for my $definition ( @{ $item[4] } ) {
+ if ( $definition->{'type'} eq 'field' ) {
+ my $field_name = $definition->{'name'};
+ $tables{ $table_name }{'fields'}{ $field_name } =
+ { %$definition, order => $i };
+ $i++;
+
+ if ( $definition->{'is_primary_key'} ) {
+ push @{ $tables{ $table_name }{'indices'} },
+ {
+ type => 'primary_key',
+ fields => [ $field_name ],
+ }
+ ;
+ }
+ }
+ else {
+ push @{ $tables{ $table_name }{'indices'} },
+ $definition;
+ }
+ }
+
+ for my $opt ( @{ $item{'table_option'} } ) {
+ if ( my ( $key, $val ) = each %$opt ) {
+ $tables{ $table_name }{'table_options'}{ $key } = $val;
+ }
+ }
+ }
+
+ create : /CREATE/i unique(?) /(INDEX|KEY)/i index_name /on/i table_name '(' field_name(s /,/) ')' ';'
+ {
+ push @{ $tables{ $item{'table_name'} }{'indices'} },
+ {
+ name => $item[4],
+ type => $item[2] ? 'unique' : 'normal',
+ fields => $item[8],
+ }
+ ;
+ }
+
+create_definition : index
+ | field
+ | <error>
+
+comment : /^\s*(?:#|-{2}).*\n/
+
+blank : /\s*/
+
+field : field_name data_type field_qualifier(s?)
+ {
+ my %qualifiers = map { %$_ } @{ $item{'field_qualifier'} || [] };
+ my $null = defined $item{'not_null'} ? $item{'not_null'} : 1;
+ delete $qualifiers{'not_null'};
+ if ( my @type_quals = @{ $item{'data_type'}{'qualifiers'} || [] } ) {
+ $qualifiers{ $_ } = 1 for @type_quals;
+ }
+
+ $return = {
+ type => 'field',
+ name => $item{'field_name'},
+ data_type => $item{'data_type'}{'type'},
+ size => $item{'data_type'}{'size'},
+ list => $item{'data_type'}{'list'},
+ null => $null,
+ %qualifiers,
+ }
+ }
+ | <error>
+
+field_qualifier : not_null
+ {
+ $return = {
+ null => $item{'not_null'},
+ }
+ }
+
+field_qualifier : default_val
+ {
+ $return = {
+ default => $item{'default_val'},
+ }
+ }
+
+field_qualifier : auto_inc
+ {
+ $return = {
+ is_auto_inc => $item{'auto_inc'},
+ }
+ }
+
+field_qualifier : ',' primary_key '(' field_name ')'
+ {
+ $return = {
+ is_primary_key => $item{'primary_key'},
+ }
+ }
+
+field_qualifier : ',' foreign_key '(' field_name ')' foreign_key_reference foreign_table_name '(' foreign_field_name ')'
+ {
+ $return = {
+ is_foreign_key => $item{'foreign_key'},
+ foreign_table => $item{'foreign_table_name'},
+ foreign_field => $item{'foreign_field_name'},
+ name => $item{'field_name'},
+ }
+ }
+
+field_qualifier : unsigned
+ {
+ $return = {
+ is_unsigned => $item{'unsigned'},
+ }
+ }
+
+index : primary_key_index
+ | unique_index
+ | fulltext_index
+ | normal_index
+
+table_name : WORD
+
+foreign_table_name : WORD
+
+field_name : WORD
+
+foreign_field_name : WORD
+
+index_name : WORD
+
+data_type : WORD parens_value_list(s?) type_qualifier(s?)
+ {
+ my $type = $item[1];
+ my $size; # field size, applicable only to non-set fields
+ my $list; # set list, applicable only to sets (duh)
+
+ if ( uc($type) =~ /^(SET|ENUM)$/ ) {
+ $size = undef;
+ $list = $item[2][0];
+ }
+ else {
+ $size = $item[2][0];
+ $list = [];
+ }
+
+ $return = {
+ type => $type,
+ size => $size,
+ list => $list,
+ qualifiers => $item[3],
+ }
+ }
+
+parens_value_list : '(' VALUE(s /,/) ')'
+ { $item[2] }
+
+type_qualifier : /(BINARY|UNSIGNED|ZEROFILL)/i
+ { lc $item[1] }
+
+field_type : WORD
+
+field_size : '(' num_range ')' { $item{'num_range'} }
+
+num_range : DIGITS ',' DIGITS
+ { $return = $item[1].','.$item[3] }
+ | DIGITS
+ { $return = $item[1] }
+
+create_table : /create/i /table/i
+
+create_index : /create/i /index/i
+
+not_null : /not/i /null/i { $return = 0 }
+
+unsigned : /unsigned/i { $return = 0 }
+
+default_val : /default/i /(?:')?[\w\d.-]*(?:')?/
+ {
+ $item[2] =~ s/'//g;
+ $return = $item[2];
+ }
+
+auto_inc : /auto_increment/i { 1 }
+
+primary_key : /primary/i /key/i { 1 }
+
+foreign_key : /foreign/i /key/i { 1 }
+
+foreign_key_reference : /references/i { 1 }
+
+primary_key_index : primary_key index_name(?) '(' field_name(s /,/) ')'
+ {
+ $return = {
+ name => $item{'index_name'}[0],
+ type => 'primary_key',
+ fields => $item[4],
+ }
+ }
+
+normal_index : key index_name(?) '(' name_with_opt_paren(s /,/) ')'
+ {
+ $return = {
+ name => $item{'index_name'}[0],
+ type => 'normal',
+ fields => $item[4],
+ }
+ }
+
+unique_index : unique key(?) index_name(?) '(' name_with_opt_paren(s /,/) ')'
+ {
+ $return = {
+ name => $item{'index_name'}[0],
+ type => 'unique',
+ fields => $item[5],
+ }
+ }
+
+fulltext_index : fulltext key(?) index_name(?) '(' name_with_opt_paren(s /,/) ')'
+ {
+ $return = {
+ name => $item{'index_name'}[0],
+ type => 'fulltext',
+ fields => $item[5],
+ }
+ }
+
+name_with_opt_paren : NAME parens_value_list(s?)
+ { $item[2][0] ? "$item[1]($item[2][0][0])" : $item[1] }
+
+fulltext : /fulltext/i { 1 }
+
+unique : /unique/i { 1 }
+
+key : /key/i | /index/i
+
+table_option : /[^\s;]*/
+ {
+ $return = { split /=/, $item[1] }
+ }
+
+WORD : /\w+/
+
+DIGITS : /\d+/
+
+COMMA : ','
+
+NAME : "`" /\w+/ "`"
+ { $item[2] }
+ | /\w+/
+ { $item[1] }
+
+VALUE : /[-+]?\.?\d+(?:[eE]\d+)?/
+ { $item[1] }
+ | /'.*?'/ # XXX doesn't handle embedded quotes
+ { $item[1] }
+ | /NULL/
+ { 'NULL' }
+
+!;
+
+# -------------------------------------------------------------------
+sub parse {
+ my ( $translator, $data ) = @_;
+ $parser ||= Parse::RecDescent->new($GRAMMAR);
+
+ $::RD_TRACE = $translator->trace ? 1 : undef;
+ $DEBUG = $translator->debug;
+
+ unless (defined $parser) {
+ return $translator->error("Error instantiating Parse::RecDescent ".
+ "instance: Bad grammer");
+ }
+
+ my $result = $parser->startrule($data);
+ die "Parse failed.\n" unless defined $result;
+ warn Dumper($result) if $DEBUG;
+ return $result;
+}
+
+1;
+
+#-----------------------------------------------------
+# Where man is not nature is barren.
+# William Blake
+#-----------------------------------------------------
+
+=pod
+
+=head1 AUTHOR
+
+Ken Y. Clark E<lt>kclark@cpan.orgE<gt>,
+Chris Mungall
+
+=head1 SEE ALSO
+
+perl(1), Parse::RecDescent.
+
+=cut
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