[dbsrgits/SQL-Translator.git] / lib / SQL / Translator / Producer / PostgreSQL.pm

package SQL::Translator::Producer::PostgreSQL;

# -------------------------------------------------------------------
# $Id: PostgreSQL.pm,v 1.16 2003-09-04 15:33:24 kycl4rk 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::Producer::PostgreSQL - PostgreSQL producer for SQL::Translator

=cut

use strict;
use vars qw[ $DEBUG $WARN $VERSION ];
$VERSION = sprintf "%d.%02d", q$Revision: 1.16 $ =~ /(\d+)\.(\d+)/;
$DEBUG = 1 unless defined $DEBUG;

use SQL::Translator::Schema::Constants;
use SQL::Translator::Utils qw(header_comment);
use Data::Dumper;

my %translate  = (
    #
    # MySQL types
    #
    bigint     => 'bigint',
    double     => 'numeric',
    decimal    => 'numeric',
    float      => 'numeric',
    int        => 'integer',
    mediumint  => 'integer',
    smallint   => 'smallint',
    tinyint    => 'smallint',
    char       => 'char',
    varchar    => 'character varying',
    longtext   => 'text',
    mediumtext => 'text',
    text       => 'text',
    tinytext   => 'text',
    tinyblob   => 'bytea',
    blob       => 'bytea',
    mediumblob => 'bytea',
    longblob   => 'bytea',
    enum       => 'character varying',
    set        => 'character varying',
    date       => 'date',
    datetime   => 'timestamp',
    time       => 'date',
    timestamp  => 'timestamp',
    year       => 'date',

    #
    # Oracle types
    #
    number     => 'integer',
    char       => 'char',
    varchar2   => 'character varying',
    long       => 'text',
    CLOB       => 'bytea',
    date       => 'date',

    #
    # Sybase types
    #
    int        => 'integer',
    money      => 'money',
    varchar    => 'character varying',
    datetime   => 'timestamp',
    text       => 'text',
    real       => 'numeric',
    comment    => 'text',
    bit        => 'bit',
    tinyint    => 'smallint',
    float      => 'numeric',
);

my %reserved = map { $_, 1 } qw[
    ALL ANALYSE ANALYZE AND ANY AS ASC 
    BETWEEN BINARY BOTH
    CASE CAST CHECK COLLATE COLUMN CONSTRAINT CROSS
    CURRENT_DATE CURRENT_TIME CURRENT_TIMESTAMP CURRENT_USER 
    DEFAULT DEFERRABLE DESC DISTINCT DO
    ELSE END EXCEPT
    FALSE FOR FOREIGN FREEZE FROM FULL 
    GROUP HAVING 
    ILIKE IN INITIALLY INNER INTERSECT INTO IS ISNULL 
    JOIN LEADING LEFT LIKE LIMIT 
    NATURAL NEW NOT NOTNULL NULL
    OFF OFFSET OLD ON ONLY OR ORDER OUTER OVERLAPS
    PRIMARY PUBLIC REFERENCES RIGHT 
    SELECT SESSION_USER SOME TABLE THEN TO TRAILING TRUE 
    UNION UNIQUE USER USING VERBOSE WHEN WHERE
];

my $max_id_length    = 30;
my %used_identifiers = ();
my %global_names;
my %unreserve;
my %truncated;

=pod

=head1 PostgreSQL Create Table Syntax

  CREATE [ [ LOCAL ] { TEMPORARY | TEMP } ] TABLE table_name (
      { column_name data_type [ DEFAULT default_expr ] [ column_constraint [, ... ] ]
      | table_constraint }  [, ... ]
  )
  [ INHERITS ( parent_table [, ... ] ) ]
  [ WITH OIDS | WITHOUT OIDS ]

where column_constraint is:

  [ CONSTRAINT constraint_name ]
  { NOT NULL | NULL | UNIQUE | PRIMARY KEY |
    CHECK (expression) |
    REFERENCES reftable [ ( refcolumn ) ] [ MATCH FULL | MATCH PARTIAL ]
      [ ON DELETE action ] [ ON UPDATE action ] }
  [ DEFERRABLE | NOT DEFERRABLE ] [ INITIALLY DEFERRED | INITIALLY IMMEDIATE ]

and table_constraint is:

  [ CONSTRAINT constraint_name ]
  { UNIQUE ( column_name [, ... ] ) |
    PRIMARY KEY ( column_name [, ... ] ) |
    CHECK ( expression ) |
    FOREIGN KEY ( column_name [, ... ] ) REFERENCES reftable [ ( refcolumn [, ... ] ) ]
      [ MATCH FULL | MATCH PARTIAL ] [ ON DELETE action ] [ ON UPDATE action ] }
  [ DEFERRABLE | NOT DEFERRABLE ] [ INITIALLY DEFERRED | INITIALLY IMMEDIATE ]

=head1 Create Index Syntax

  CREATE [ UNIQUE ] INDEX index_name ON table
      [ USING acc_method ] ( column [ ops_name ] [, ...] )
      [ WHERE predicate ]
  CREATE [ UNIQUE ] INDEX index_name ON table
      [ USING acc_method ] ( func_name( column [, ... ]) [ ops_name ] )
      [ WHERE predicate ]

=cut

# -------------------------------------------------------------------
sub produce {
    my $translator     = shift;
    $DEBUG             = $translator->debug;
    $WARN              = $translator->show_warnings;
    my $no_comments    = $translator->no_comments;
    my $add_drop_table = $translator->add_drop_table;
    my $schema         = $translator->schema;

    my $output;
    $output .= header_comment unless ($no_comments);
    my %used_index_names;

    for my $table ( $schema->get_tables ) {
        my $table_name    = $table->name or next;
        $table_name       = mk_name( $table_name, '', undef, 1 );
        my $table_name_ur = unreserve($table_name);

        my ( @comments, @field_defs, @sequence_defs, @constraint_defs );

        push @comments, "--\n-- Table: $table_name_ur\n--" unless $no_comments;

        #
        # Fields
        #
        my %field_name_scope;
        for my $field ( $table->get_fields ) {
            my $field_name    = mk_name(
                $field->name, '', \%field_name_scope, 1 
            );
            my $field_name_ur = unreserve( $field_name, $table_name );
            my $field_def     = qq["$field_name_ur"];

            #
            # Datatype
            #
            my @size      = $field->size;
            my $data_type = lc $field->data_type;
            my %extra     = $field->extra;
            my $list      = $extra{'list'} || [];
            # todo deal with embedded quotes
            my $commalist = join( ', ', map { qq['$_'] } @$list );
            my $seq_name;

            if ( $data_type eq 'enum' ) {
                my $len = 0;
                $len = ($len < length($_)) ? length($_) : $len for (@$list);
                my $chk_name = mk_name( $table_name.'_'.$field_name, 'chk' );
                push @constraint_defs, 
                    qq[Constraint "$chk_name" CHECK ("$field_name" ].
                    qq[IN ($commalist))];
                $data_type = 'character varying';
            }
            elsif ( $data_type eq 'set' ) {
                # XXX add a CHECK constraint maybe 
                # (trickier and slower, than enum :)
#                my $len     = length $commalist;
#                $field_def .= " character varying($len) /* set $commalist */";
                $data_type = 'character varying';
            }
            elsif ( $field->is_auto_increment ) {
                if ( defined $size[0] && $size[0] > 11 ) {
                    $data_type = 'bigserial';
                }
                else {
                    $data_type = 'serial';
                }
                undef @size;

#                $seq_name   = mk_name( $table_name.'_'.$field_name, 'sq' );
#                push @sequence_defs, qq[DROP SEQUENCE "$seq_name";];
#                push @sequence_defs, qq[CREATE SEQUENCE "$seq_name";];
            }
            else {
                $data_type  = defined $translate{ $data_type } ?
                              $translate{ $data_type } :
                              $data_type;
            }

            if ( $data_type =~ /timestamp/i ) {
                if ( defined $size[0] && $size[0] > 13 ) {
                    $size[0] = 13;
                }
            }

            if ( $data_type eq 'integer' ) {
                if ( defined $size[0] ) {
                    if ( $size[0] > 10 ) {
                        $data_type = 'bigint';
                    }
                    elsif ( $size[0] < 5 ) {
                        $data_type = 'smallint';
                    }
                    else {
                        $data_type = 'integer';
                    }
                }
                else {
                    $data_type = 'integer';
                }
            }

            #
            # PG doesn't need a size for integers or text
            #
            undef @size if $data_type =~ m/(integer|smallint|bigint|text)/;
            
            $field_def .= " $data_type";

            if ( defined $size[0] && $size[0] > 0 ) {
                $field_def .= '(' . join( ',', @size ) . ')';
            }

            #
            # Default value
            #
            my $default = $field->default_value;
            if ( defined $default ) {
                $field_def .= sprintf( ' DEFAULT %s',
                    ( $field->is_auto_increment && $seq_name )
                    ? qq[nextval('"$seq_name"'::text)] :
                    ( $default =~ m/null/i ) ? 'NULL' : "'$default'"
                );
            }

            #
            # Not null constraint
            #
            $field_def .= ' NOT NULL' unless $field->is_nullable;

            push @field_defs, $field_def;
        }

        #
        # Index Declarations
        #
        my @index_defs = ();
        my $idx_name_default;
        for my $index ( $table->get_indices ) {
            my $name = $index->name || '';
            my $type = $index->type || NORMAL;
            my @fields     = 
                map { $_ =~ s/\(.+\)//; $_ }
                map { unreserve( $_, $table_name ) }
                $index->fields;
            next unless @fields;

            if ( $type eq PRIMARY_KEY ) {
                $name ||= mk_name( $table_name, 'pk' );
                $name = next_unused_name($name, \%used_index_names);
                # how do I get next_unused_name() to do: ?
                $used_index_names{$name} = $name;
                push @constraint_defs, 'Constraint "'.$name.'" PRIMARY KEY '.
                    '("' . join( '", "', @fields ) . '")';
            }
            elsif ( $type eq UNIQUE ) {
                $name ||= mk_name( 
                    $table_name, $name || ++$idx_name_default
                );
                $name = next_unused_name($name, \%used_index_names);
                $used_index_names{$name} = $name;
                push @constraint_defs, 'Constraint "' . $name . '" UNIQUE ' .
                    '("' . join( '", "', @fields ) . '")';
            }
            elsif ( $type eq NORMAL ) {
                $name ||= mk_name( 
                    $table_name, $name || ++$idx_name_default
                );
                $name = next_unused_name($name, \%used_index_names);
                $used_index_names{$name} = $name;
                push @index_defs, 
                    qq[CREATE INDEX "$name" on $table_name_ur ("].
                        join( '", "', @fields ).  
                    '");'; 
            }
            else {
                warn "Unknown index type ($type) on table $table_name.\n"
                    if $WARN;
            }
        }

        #
        # Table constraints
        #
        my $c_name_default;
        for my $c ( $table->get_constraints ) {
            my $name = $c->name || '';
            my @fields     = 
                map { $_ =~ s/\(.+\)//; $_ }
                map { unreserve( $_, $table_name ) }
                $c->fields;
            my @rfields     = 
                map { $_ =~ s/\(.+\)//; $_ }
                map { unreserve( $_, $table_name ) }
                $c->reference_fields;
            next if !@fields && $c->type ne CHECK_C;

            if ( $c->type eq PRIMARY_KEY ) {
                $name ||= mk_name( $table_name, 'pk' );
                $name = next_unused_name($name, \%used_index_names);
                $used_index_names{$name} = $name;
                push @constraint_defs, qq[Constraint "$name" PRIMARY KEY ].
                    '("' . join( '", "', @fields ) . '")';
            }
            elsif ( $c->type eq UNIQUE ) {
                $name ||= mk_name( 
                    $table_name, $name || ++$c_name_default
                );
                $name = next_unused_name($name, \%used_index_names);
                $used_index_names{$name} = $name;
                push @constraint_defs, qq[Constraint "$name" UNIQUE ] .
                    '("' . join( '", "', @fields ) . '")';
            }
            elsif ( $c->type eq CHECK_C ) {
                my $s;
                if ( $name ) {
                    $name ||= mk_name( 
                        $table_name, $name || ++$c_name_default
                    );
                    $name = next_unused_name($name, \%used_index_names);
                    $used_index_names{$name} = $name;
                    $s = 'Constraint "$name" ';
                }
                my $expression = $c->expression;
                push @constraint_defs, "${s}CHECK ($expression)";
            }
            elsif ( $c->type eq FOREIGN_KEY ) {
                my $def = join(' ', 
                    map { $_ || () } 'FOREIGN KEY', $c->name 
                );

                $def .= ' ("' . join( '", "', @fields ) . '")';

                $def .= ' REFERENCES ' . $c->reference_table;

                if ( @rfields ) {
                    $def .= ' ("' . join( '", "', @rfields ) . '")';
                }

                if ( $c->match_type ) {
                    $def .= ' MATCH ' . 
                        ( $c->match_type =~ /full/i ) ? 'FULL' : 'PARTIAL';
                }

                if ( $c->on_delete ) {
                    $def .= ' ON DELETE '.join( ' ', $c->on_delete );
                }

                if ( $c->on_update ) {
                    $def .= ' ON UPDATE '.join( ' ', $c->on_update );
                }

                push @constraint_defs, $def;
            }
        }

        my $create_statement;
        $create_statement  = qq[DROP TABLE "$table_name_ur";\n] 
            if $add_drop_table;
        $create_statement .= qq[CREATE TABLE "$table_name_ur" (\n].
            join( ",\n", map { "  $_" } @field_defs, @constraint_defs ).
            "\n);"
        ;

        $output .= join( "\n\n", 
            @comments,
            @sequence_defs, 
            $create_statement, 
            @index_defs, 
            '' 
        );
    }

    if ( $WARN ) {
        if ( %truncated ) {
            warn "Truncated " . keys( %truncated ) . " names:\n";
            warn "\t" . join( "\n\t", sort keys %truncated ) . "\n";
        }

        if ( %unreserve ) {
            warn "Encounted " . keys( %unreserve ) .
                " unsafe names in schema (reserved or invalid):\n";
            warn "\t" . join( "\n\t", sort keys %unreserve ) . "\n";
        }
    }

    return $output;
}

# -------------------------------------------------------------------
sub mk_name {
    my $basename      = shift || ''; 
    my $type          = shift || ''; 
    my $scope         = shift || ''; 
    my $critical      = shift || '';
    my $basename_orig = $basename;
    my $max_name      = $type 
                        ? $max_id_length - (length($type) + 1) 
                        : $max_id_length;
    $basename         = substr( $basename, 0, $max_name ) 
                        if length( $basename ) > $max_name;
    my $name          = $type ? "${type}_$basename" : $basename;

    if ( $basename ne $basename_orig and $critical ) {
        my $show_type = $type ? "+'$type'" : "";
        warn "Truncating '$basename_orig'$show_type to $max_id_length ",
            "character limit to make '$name'\n" if $WARN;
        $truncated{ $basename_orig } = $name;
    }

    $scope ||= \%global_names;
    if ( my $prev = $scope->{ $name } ) {
        my $name_orig = $name;
        $name        .= sprintf( "%02d", ++$prev );
        substr($name, $max_id_length - 3) = "00" 
            if length( $name ) > $max_id_length;

        warn "The name '$name_orig' has been changed to ",
             "'$name' to make it unique.\n" if $WARN;

        $scope->{ $name_orig }++;
    }

    $scope->{ $name }++;
    return $name;
}

# -------------------------------------------------------------------
sub unreserve {
    my $name            = shift || '';
    my $schema_obj_name = shift || '';

    my ( $suffix ) = ( $name =~ s/(\W.*)$// ) ? $1 : '';

    # also trap fields that don't begin with a letter
    return $name if !$reserved{ uc $name } && $name =~ /^[a-z]/i; 

    if ( $schema_obj_name ) {
        ++$unreserve{"$schema_obj_name.$name"};
    }
    else {
        ++$unreserve{"$name (table name)"};
    }

    my $unreserve = sprintf '%s_', $name;
    return $unreserve.$suffix;
}

# -------------------------------------------------------------------
sub next_unused_name {
    my $name       = shift || '';
    my $used_names = shift || '';

    my %used_names = %$used_names;

    if ( !defined($used_names{$name}) ) {
        $used_names{$name} = $name;
        return $name;
    }
    
    my $i = 2;
    while ( defined($used_names{$name . $i}) ) {
        ++$i;
    }
    $name .= $i;
    $used_names{$name} = $name;
    return $name;
}

1;

# -------------------------------------------------------------------
# Life is full of misery, loneliness, and suffering --
# and it's all over much too soon.
# Woody Allen
# -------------------------------------------------------------------

=pod

=head1 AUTHOR

Ken Y. Clark E<lt>kclark@cpan.orgE<gt>

=cut
Commit	Line	Data
f8f0253c	1	package SQL::Translator::Producer::PostgreSQL;
	2
	3	# -------------------------------------------------------------------
4328d7bd	4	# $Id: PostgreSQL.pm,v 1.16 2003-09-04 15:33:24 kycl4rk Exp $
f8f0253c	5	# -------------------------------------------------------------------
abfa405a	6	# Copyright (C) 2003 Ken Y. Clark <kclark@cpan.org>,
	7	# darren chamberlain <darren@cpan.org>,
	8	# Chris Mungall <cjm@fruitfly.org>
f8f0253c	9	#
	10	# This program is free software; you can redistribute it and/or
	11	# modify it under the terms of the GNU General Public License as
	12	# published by the Free Software Foundation; version 2.
	13	#
	14	# This program is distributed in the hope that it will be useful, but
	15	# WITHOUT ANY WARRANTY; without even the implied warranty of
	16	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	17	# General Public License for more details.
	18	#
	19	# You should have received a copy of the GNU General Public License
	20	# along with this program; if not, write to the Free Software
	21	# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
	22	# 02111-1307 USA
	23	# -------------------------------------------------------------------
	24
96844cae	25	=head1 NAME
	26
	27	SQL::Translator::Producer::PostgreSQL - PostgreSQL producer for SQL::Translator
	28
	29	=cut
	30
f8f0253c	31	use strict;
96844cae	32	use vars qw[ $DEBUG $WARN $VERSION ];
4328d7bd	33	$VERSION = sprintf "%d.%02d", q$Revision: 1.16 $ =~ /(\d+)\.(\d+)/;
f8f0253c	34	$DEBUG = 1 unless defined $DEBUG;
f8f0253c	35
0c43e0a1	36	use SQL::Translator::Schema::Constants;
5ee19df8	37	use SQL::Translator::Utils qw(header_comment);
f8f0253c	38	use Data::Dumper;
f8f0253c	39
d529894e	40	my %translate = (
	41	#
	42	# MySQL types
	43	#
	44	bigint => 'bigint',
4328d7bd	45	double => 'numeric',
	46	decimal => 'numeric',
	47	float => 'numeric',
d529894e	48	int => 'integer',
	49	mediumint => 'integer',
	50	smallint => 'smallint',
	51	tinyint => 'smallint',
	52	char => 'char',
da8e499e	53	varchar => 'character varying',
d529894e	54	longtext => 'text',
	55	mediumtext => 'text',
	56	text => 'text',
	57	tinytext => 'text',
	58	tinyblob => 'bytea',
	59	blob => 'bytea',
	60	mediumblob => 'bytea',
	61	longblob => 'bytea',
da8e499e	62	enum => 'character varying',
da8e499e	63	set => 'character varying',
d529894e	64	date => 'date',
	65	datetime => 'timestamp',
	66	time => 'date',
	67	timestamp => 'timestamp',
	68	year => 'date',
	69
	70	#
	71	# Oracle types
	72	#
96844cae	73	number => 'integer',
96844cae	74	char => 'char',
da8e499e	75	varchar2 => 'character varying',
96844cae	76	long => 'text',
	77	CLOB => 'bytea',
	78	date => 'date',
	79
	80	#
	81	# Sybase types
	82	#
	83	int => 'integer',
	84	money => 'money',
da8e499e	85	varchar => 'character varying',
96844cae	86	datetime => 'timestamp',
96844cae	87	text => 'text',
4328d7bd	88	real => 'numeric',
96844cae	89	comment => 'text',
	90	bit => 'bit',
	91	tinyint => 'smallint',
4328d7bd	92	float => 'numeric',
d529894e	93	);
d529894e	94
96844cae	95	my %reserved = map { $_, 1 } qw[
	96	ALL ANALYSE ANALYZE AND ANY AS ASC
	97	BETWEEN BINARY BOTH
	98	CASE CAST CHECK COLLATE COLUMN CONSTRAINT CROSS
	99	CURRENT_DATE CURRENT_TIME CURRENT_TIMESTAMP CURRENT_USER
	100	DEFAULT DEFERRABLE DESC DISTINCT DO
	101	ELSE END EXCEPT
	102	FALSE FOR FOREIGN FREEZE FROM FULL
	103	GROUP HAVING
	104	ILIKE IN INITIALLY INNER INTERSECT INTO IS ISNULL
	105	JOIN LEADING LEFT LIKE LIMIT
	106	NATURAL NEW NOT NOTNULL NULL
	107	OFF OFFSET OLD ON ONLY OR ORDER OUTER OVERLAPS
	108	PRIMARY PUBLIC REFERENCES RIGHT
	109	SELECT SESSION_USER SOME TABLE THEN TO TRAILING TRUE
	110	UNION UNIQUE USER USING VERBOSE WHEN WHERE
	111	];
d529894e	112
96844cae	113	my $max_id_length = 30;
	114	my %used_identifiers = ();
	115	my %global_names;
	116	my %unreserve;
	117	my %truncated;
	118
	119	=pod
	120
	121	=head1 PostgreSQL Create Table Syntax
	122
	123	CREATE [ [ LOCAL ] { TEMPORARY \| TEMP } ] TABLE table_name (
	124	{ column_name data_type [ DEFAULT default_expr ] [ column_constraint [, ... ] ]
	125	\| table_constraint } [, ... ]
	126	)
	127	[ INHERITS ( parent_table [, ... ] ) ]
	128	[ WITH OIDS \| WITHOUT OIDS ]
	129
	130	where column_constraint is:
	131
	132	[ CONSTRAINT constraint_name ]
	133	{ NOT NULL \| NULL \| UNIQUE \| PRIMARY KEY \|
	134	CHECK (expression) \|
	135	REFERENCES reftable [ ( refcolumn ) ] [ MATCH FULL \| MATCH PARTIAL ]
	136	[ ON DELETE action ] [ ON UPDATE action ] }
	137	[ DEFERRABLE \| NOT DEFERRABLE ] [ INITIALLY DEFERRED \| INITIALLY IMMEDIATE ]
	138
	139	and table_constraint is:
	140
	141	[ CONSTRAINT constraint_name ]
	142	{ UNIQUE ( column_name [, ... ] ) \|
	143	PRIMARY KEY ( column_name [, ... ] ) \|
	144	CHECK ( expression ) \|
	145	FOREIGN KEY ( column_name [, ... ] ) REFERENCES reftable [ ( refcolumn [, ... ] ) ]
	146	[ MATCH FULL \| MATCH PARTIAL ] [ ON DELETE action ] [ ON UPDATE action ] }
	147	[ DEFERRABLE \| NOT DEFERRABLE ] [ INITIALLY DEFERRED \| INITIALLY IMMEDIATE ]
	148
da8e499e	149	=head1 Create Index Syntax
	150
	151	CREATE [ UNIQUE ] INDEX index_name ON table
	152	[ USING acc_method ] ( column [ ops_name ] [, ...] )
	153	[ WHERE predicate ]
	154	CREATE [ UNIQUE ] INDEX index_name ON table
	155	[ USING acc_method ] ( func_name( column [, ... ]) [ ops_name ] )
	156	[ WHERE predicate ]
	157
96844cae	158	=cut
f8f0253c	159
96844cae	160	# -------------------------------------------------------------------
f8f0253c	161	sub produce {
a1d94525	162	my $translator = shift;
	163	$DEBUG = $translator->debug;
	164	$WARN = $translator->show_warnings;
	165	my $no_comments = $translator->no_comments;
	166	my $add_drop_table = $translator->add_drop_table;
	167	my $schema = $translator->schema;
96844cae	168
da8e499e	169	my $output;
5ee19df8	170	$output .= header_comment unless ($no_comments);
50840472	171	my %used_index_names;
96844cae	172
0c43e0a1	173	for my $table ( $schema->get_tables ) {
0c43e0a1	174	my $table_name = $table->name or next;
da8e499e	175	$table_name = mk_name( $table_name, '', undef, 1 );
	176	my $table_name_ur = unreserve($table_name);
	177
0c43e0a1	178	my ( @comments, @field_defs, @sequence_defs, @constraint_defs );
96844cae	179
da8e499e	180	push @comments, "--\n-- Table: $table_name_ur\n--" unless $no_comments;
f8f0253c	181
	182	#
	183	# Fields
	184	#
96844cae	185	my %field_name_scope;
0c43e0a1	186	for my $field ( $table->get_fields ) {
96844cae	187	my $field_name = mk_name(
0c43e0a1	188	$field->name, '', \%field_name_scope, 1
96844cae	189	);
96844cae	190	my $field_name_ur = unreserve( $field_name, $table_name );
0c43e0a1	191	my $field_def = qq["$field_name_ur"];
da8e499e	192
	193	#
	194	# Datatype
	195	#
0c43e0a1	196	my @size = $field->size;
	197	my $data_type = lc $field->data_type;
	198	my %extra = $field->extra;
	199	my $list = $extra{'list'} \|\| [];
4524cf01	200	# todo deal with embedded quotes
4524cf01	201	my $commalist = join( ', ', map { qq['$_'] } @$list );
da8e499e	202	my $seq_name;
	203
	204	if ( $data_type eq 'enum' ) {
	205	my $len = 0;
	206	$len = ($len < length($_)) ? length($_) : $len for (@$list);
4524cf01	207	my $chk_name = mk_name( $table_name.'_'.$field_name, 'chk' );
0c43e0a1	208	push @constraint_defs,
4328d7bd	209	qq[Constraint "$chk_name" CHECK ("$field_name" ].
4328d7bd	210	qq[IN ($commalist))];
0c43e0a1	211	$data_type = 'character varying';
da8e499e	212	}
	213	elsif ( $data_type eq 'set' ) {
	214	# XXX add a CHECK constraint maybe
	215	# (trickier and slower, than enum :)
0c43e0a1	216	# my $len = length $commalist;
	217	# $field_def .= " character varying($len) /* set $commalist */";
	218	$data_type = 'character varying';
da8e499e	219	}
0c43e0a1	220	elsif ( $field->is_auto_increment ) {
50840472	221	if ( defined $size[0] && $size[0] > 11 ) {
4328d7bd	222	$data_type = 'bigserial';
50840472	223	}
50840472	224	else {
4328d7bd	225	$data_type = 'serial';
50840472	226	}
	227	undef @size;
	228
0c43e0a1	229	# $seq_name = mk_name( $table_name.'_'.$field_name, 'sq' );
	230	# push @sequence_defs, qq[DROP SEQUENCE "$seq_name";];
	231	# push @sequence_defs, qq[CREATE SEQUENCE "$seq_name";];
da8e499e	232	}
	233	else {
	234	$data_type = defined $translate{ $data_type } ?
	235	$translate{ $data_type } :
61aa0c9d	236	$data_type;
0c43e0a1	237	}
0c43e0a1	238
50840472	239	if ( $data_type =~ /timestamp/i ) {
	240	if ( defined $size[0] && $size[0] > 13 ) {
	241	$size[0] = 13;
	242	}
	243	}
	244
	245	if ( $data_type eq 'integer' ) {
	246	if ( defined $size[0] ) {
4328d7bd	247	if ( $size[0] > 10 ) {
4328d7bd	248	$data_type = 'bigint';
50840472	249	}
50840472	250	elsif ( $size[0] < 5 ) {
4328d7bd	251	$data_type = 'smallint';
50840472	252	}
50840472	253	else {
4328d7bd	254	$data_type = 'integer';
50840472	255	}
	256	}
	257	else {
4328d7bd	258	$data_type = 'integer';
50840472	259	}
50840472	260	}
4328d7bd	261
	262	#
	263	# PG doesn't need a size for integers or text
	264	#
	265	undef @size if $data_type =~ m/(integer\|smallint\|bigint\|text)/;
50840472	266
0c43e0a1	267	$field_def .= " $data_type";
	268
	269	if ( defined $size[0] && $size[0] > 0 ) {
4328d7bd	270	$field_def .= '(' . join( ',', @size ) . ')';
f8f0253c	271	}
f8f0253c	272
da8e499e	273	#
	274	# Default value
	275	#
0c43e0a1	276	my $default = $field->default_value;
	277	if ( defined $default ) {
	278	$field_def .= sprintf( ' DEFAULT %s',
	279	( $field->is_auto_increment && $seq_name )
da8e499e	280	? qq[nextval('"$seq_name"'::text)] :
0c43e0a1	281	( $default =~ m/null/i ) ? 'NULL' : "'$default'"
da8e499e	282	);
da8e499e	283	}
f8f0253c	284
da8e499e	285	#
	286	# Not null constraint
	287	#
0c43e0a1	288	$field_def .= ' NOT NULL' unless $field->is_nullable;
f8f0253c	289
0c43e0a1	290	push @field_defs, $field_def;
f8f0253c	291	}
f8f0253c	292
f8f0253c	293	#
da8e499e	294	# Index Declarations
f8f0253c	295	#
0c43e0a1	296	my @index_defs = ();
da8e499e	297	my $idx_name_default;
0c43e0a1	298	for my $index ( $table->get_indices ) {
	299	my $name = $index->name \|\| '';
	300	my $type = $index->type \|\| NORMAL;
d8dcdb7a	301	my @fields =
	302	map { $_ =~ s/\(.+\)//; $_ }
	303	map { unreserve( $_, $table_name ) }
0c43e0a1	304	$index->fields;
da8e499e	305	next unless @fields;
da8e499e	306
0c43e0a1	307	if ( $type eq PRIMARY_KEY ) {
0c43e0a1	308	$name \|\|= mk_name( $table_name, 'pk' );
50840472	309	$name = next_unused_name($name, \%used_index_names);
	310	# how do I get next_unused_name() to do: ?
	311	$used_index_names{$name} = $name;
4328d7bd	312	push @constraint_defs, 'Constraint "'.$name.'" PRIMARY KEY '.
50840472	313	'("' . join( '", "', @fields ) . '")';
da8e499e	314	}
0c43e0a1	315	elsif ( $type eq UNIQUE ) {
	316	$name \|\|= mk_name(
	317	$table_name, $name \|\| ++$idx_name_default
da8e499e	318	);
50840472	319	$name = next_unused_name($name, \%used_index_names);
50840472	320	$used_index_names{$name} = $name;
4328d7bd	321	push @constraint_defs, 'Constraint "' . $name . '" UNIQUE ' .
50840472	322	'("' . join( '", "', @fields ) . '")';
da8e499e	323	}
0c43e0a1	324	elsif ( $type eq NORMAL ) {
	325	$name \|\|= mk_name(
	326	$table_name, $name \|\| ++$idx_name_default
da8e499e	327	);
50840472	328	$name = next_unused_name($name, \%used_index_names);
50840472	329	$used_index_names{$name} = $name;
0c43e0a1	330	push @index_defs,
50840472	331	qq[CREATE INDEX "$name" on $table_name_ur ("].
	332	join( '", "', @fields ).
	333	'");';
da8e499e	334	}
f8f0253c	335	else {
0c43e0a1	336	warn "Unknown index type ($type) on table $table_name.\n"
da8e499e	337	if $WARN;
f8f0253c	338	}
	339	}
	340
0c43e0a1	341	#
	342	# Table constraints
	343	#
	344	my $c_name_default;
	345	for my $c ( $table->get_constraints ) {
	346	my $name = $c->name \|\| '';
	347	my @fields =
	348	map { $_ =~ s/\(.+\)//; $_ }
	349	map { unreserve( $_, $table_name ) }
	350	$c->fields;
	351	my @rfields =
	352	map { $_ =~ s/\(.+\)//; $_ }
	353	map { unreserve( $_, $table_name ) }
	354	$c->reference_fields;
8065e024	355	next if !@fields && $c->type ne CHECK_C;
0c43e0a1	356
	357	if ( $c->type eq PRIMARY_KEY ) {
	358	$name \|\|= mk_name( $table_name, 'pk' );
50840472	359	$name = next_unused_name($name, \%used_index_names);
50840472	360	$used_index_names{$name} = $name;
4328d7bd	361	push @constraint_defs, qq[Constraint "$name" PRIMARY KEY ].
50840472	362	'("' . join( '", "', @fields ) . '")';
0c43e0a1	363	}
	364	elsif ( $c->type eq UNIQUE ) {
	365	$name \|\|= mk_name(
	366	$table_name, $name \|\| ++$c_name_default
	367	);
50840472	368	$name = next_unused_name($name, \%used_index_names);
50840472	369	$used_index_names{$name} = $name;
4328d7bd	370	push @constraint_defs, qq[Constraint "$name" UNIQUE ] .
50840472	371	'("' . join( '", "', @fields ) . '")';
0c43e0a1	372	}
8065e024	373	elsif ( $c->type eq CHECK_C ) {
	374	my $s;
	375	if ( $name ) {
	376	$name \|\|= mk_name(
	377	$table_name, $name \|\| ++$c_name_default
	378	);
	379	$name = next_unused_name($name, \%used_index_names);
	380	$used_index_names{$name} = $name;
4328d7bd	381	$s = 'Constraint "$name" ';
8065e024	382	}
	383	my $expression = $c->expression;
	384	push @constraint_defs, "${s}CHECK ($expression)";
	385	}
0c43e0a1	386	elsif ( $c->type eq FOREIGN_KEY ) {
	387	my $def = join(' ',
	388	map { $_ \|\| () } 'FOREIGN KEY', $c->name
	389	);
	390
50840472	391	$def .= ' ("' . join( '", "', @fields ) . '")';
0c43e0a1	392
	393	$def .= ' REFERENCES ' . $c->reference_table;
	394
	395	if ( @rfields ) {
50840472	396	$def .= ' ("' . join( '", "', @rfields ) . '")';
0c43e0a1	397	}
	398
	399	if ( $c->match_type ) {
	400	$def .= ' MATCH ' .
	401	( $c->match_type =~ /full/i ) ? 'FULL' : 'PARTIAL';
	402	}
	403
	404	if ( $c->on_delete ) {
	405	$def .= ' ON DELETE '.join( ' ', $c->on_delete );
	406	}
	407
	408	if ( $c->on_update ) {
	409	$def .= ' ON UPDATE '.join( ' ', $c->on_update );
	410	}
	411
	412	push @constraint_defs, $def;
	413	}
	414	}
	415
da8e499e	416	my $create_statement;
	417	$create_statement = qq[DROP TABLE "$table_name_ur";\n]
	418	if $add_drop_table;
	419	$create_statement .= qq[CREATE TABLE "$table_name_ur" (\n].
0c43e0a1	420	join( ",\n", map { " $_" } @field_defs, @constraint_defs ).
da8e499e	421	"\n);"
	422	;
	423
	424	$output .= join( "\n\n",
	425	@comments,
0c43e0a1	426	@sequence_defs,
da8e499e	427	$create_statement,
0c43e0a1	428	@index_defs,
da8e499e	429	''
	430	);
	431	}
	432
	433	if ( $WARN ) {
	434	if ( %truncated ) {
	435	warn "Truncated " . keys( %truncated ) . " names:\n";
	436	warn "\t" . join( "\n\t", sort keys %truncated ) . "\n";
	437	}
	438
	439	if ( %unreserve ) {
	440	warn "Encounted " . keys( %unreserve ) .
	441	" unsafe names in schema (reserved or invalid):\n";
	442	warn "\t" . join( "\n\t", sort keys %unreserve ) . "\n";
	443	}
f8f0253c	444	}
f8f0253c	445
da8e499e	446	return $output;
f8f0253c	447	}
f8f0253c	448
96844cae	449	# -------------------------------------------------------------------
96844cae	450	sub mk_name {
0c43e0a1	451	my $basename = shift \|\| '';
	452	my $type = shift \|\| '';
	453	my $scope = shift \|\| '';
	454	my $critical = shift \|\| '';
96844cae	455	my $basename_orig = $basename;
2ad4c2c8	456	my $max_name = $type
	457	? $max_id_length - (length($type) + 1)
	458	: $max_id_length;
96844cae	459	$basename = substr( $basename, 0, $max_name )
	460	if length( $basename ) > $max_name;
	461	my $name = $type ? "${type}_$basename" : $basename;
	462
	463	if ( $basename ne $basename_orig and $critical ) {
	464	my $show_type = $type ? "+'$type'" : "";
	465	warn "Truncating '$basename_orig'$show_type to $max_id_length ",
	466	"character limit to make '$name'\n" if $WARN;
	467	$truncated{ $basename_orig } = $name;
	468	}
	469
	470	$scope \|\|= \%global_names;
	471	if ( my $prev = $scope->{ $name } ) {
	472	my $name_orig = $name;
	473	$name .= sprintf( "%02d", ++$prev );
	474	substr($name, $max_id_length - 3) = "00"
	475	if length( $name ) > $max_id_length;
	476
	477	warn "The name '$name_orig' has been changed to ",
	478	"'$name' to make it unique.\n" if $WARN;
	479
	480	$scope->{ $name_orig }++;
f8f0253c	481	}
96844cae	482
	483	$scope->{ $name }++;
	484	return $name;
	485	}
	486
	487	# -------------------------------------------------------------------
	488	sub unreserve {
0c43e0a1	489	my $name = shift \|\| '';
	490	my $schema_obj_name = shift \|\| '';
	491
96844cae	492	my ( $suffix ) = ( $name =~ s/(\W.*)$// ) ? $1 : '';
	493
	494	# also trap fields that don't begin with a letter
0c43e0a1	495	return $name if !$reserved{ uc $name } && $name =~ /^[a-z]/i;
96844cae	496
	497	if ( $schema_obj_name ) {
	498	++$unreserve{"$schema_obj_name.$name"};
	499	}
	500	else {
	501	++$unreserve{"$name (table name)"};
	502	}
	503
	504	my $unreserve = sprintf '%s_', $name;
	505	return $unreserve.$suffix;
f8f0253c	506	}
f8f0253c	507
50840472	508	# -------------------------------------------------------------------
	509	sub next_unused_name {
	510	my $name = shift \|\| '';
	511	my $used_names = shift \|\| '';
	512
	513	my %used_names = %$used_names;
	514
	515	if ( !defined($used_names{$name}) ) {
	516	$used_names{$name} = $name;
	517	return $name;
	518	}
	519
	520	my $i = 2;
	521	while ( defined($used_names{$name . $i}) ) {
	522	++$i;
	523	}
	524	$name .= $i;
	525	$used_names{$name} = $name;
	526	return $name;
	527	}
	528
f8f0253c	529	1;
f8f0253c	530
96844cae	531	# -------------------------------------------------------------------
	532	# Life is full of misery, loneliness, and suffering --
	533	# and it's all over much too soon.
	534	# Woody Allen
	535	# -------------------------------------------------------------------
f8f0253c	536
96844cae	537	=pod
f8f0253c	538
	539	=head1 AUTHOR
	540
	541	Ken Y. Clark E<lt>kclark@cpan.orgE<gt>
	542
	543	=cut