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

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

# -------------------------------------------------------------------
# $Id: PostgreSQL.pm,v 1.12 2003-08-16 20:12:09 rossta 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: 1.12 $ =~ /(\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     => 'double precision',
    decimal    => 'decimal',
    float      => 'double precision',
    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       => 'double precision',
    comment    => 'text',
    bit        => 'bit',
    tinyint    => 'smallint',
    float      => 'double precision',
);

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);

    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 $commalist = "'" . join("','", @$list) . "'";
            my $seq_name;

            if ( $data_type eq 'enum' ) {
                my $len = 0;
                $len = ($len < length($_)) ? length($_) : $len for (@$list);
                my $check_name = mk_name( $table_name.'_'.$field_name, 'chk' );
                push @constraint_defs, 
                "CONSTRAINT $check_name CHECK ($field_name 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 ) {
                $field_def .= ' serial';
#                $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;
            }

            $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( $table_name, 'pk' );
                push @constraint_defs, 'CONSTRAINT '.$name.' PRIMARY KEY '.
                    '(' . join( ', ', @fields ) . ')';
            }
            elsif ( $type eq UNIQUE ) {
                $name ||= mk_name( 
                    $table_name, $name || ++$idx_name_default
                );
                push @constraint_defs, 'CONSTRAINT ' . $name . ' UNIQUE ' .
                    '(' . join( ', ', @fields ) . ')';
            }
            elsif ( $type eq NORMAL ) {
                $name ||= mk_name( 
                    $table_name, $name || ++$idx_name_default
                );
                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 unless @fields;

            if ( $c->type eq PRIMARY_KEY ) {
                $name ||= mk_name( $table_name, 'pk' );
                push @constraint_defs, "CONSTRAINT $name PRIMARY KEY ".
                    '(' . join( ', ', @fields ) . ')';
            }
            elsif ( $c->type eq UNIQUE ) {
                $name ||= mk_name( 
                    $table_name, $name || ++$c_name_default
                );
                push @constraint_defs, "CONSTRAINT $name UNIQUE " .
                    '(' . join( ', ', @fields ) . ')';
            }
            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;
}

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	# -------------------------------------------------------------------
d9397268	4	# $Id: PostgreSQL.pm,v 1.12 2003-08-16 20:12:09 rossta 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 ];
d9397268	33	$VERSION = sprintf "%d.%02d", q$Revision: 1.12 $ =~ /(\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',
	45	double => 'double precision',
	46	decimal => 'decimal',
	47	float => 'double precision',
	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',
	87	text => 'text',
	88	real => 'double precision',
	89	comment => 'text',
	90	bit => 'bit',
	91	tinyint => 'smallint',
	92	float => 'double precision',
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);
96844cae	171
0c43e0a1	172	for my $table ( $schema->get_tables ) {
0c43e0a1	173	my $table_name = $table->name or next;
da8e499e	174	$table_name = mk_name( $table_name, '', undef, 1 );
	175	my $table_name_ur = unreserve($table_name);
	176
0c43e0a1	177	my ( @comments, @field_defs, @sequence_defs, @constraint_defs );
96844cae	178
da8e499e	179	push @comments, "--\n-- Table: $table_name_ur\n--" unless $no_comments;
f8f0253c	180
	181	#
	182	# Fields
	183	#
96844cae	184	my %field_name_scope;
0c43e0a1	185	for my $field ( $table->get_fields ) {
96844cae	186	my $field_name = mk_name(
0c43e0a1	187	$field->name, '', \%field_name_scope, 1
96844cae	188	);
96844cae	189	my $field_name_ur = unreserve( $field_name, $table_name );
0c43e0a1	190	my $field_def = qq["$field_name_ur"];
da8e499e	191
	192	#
	193	# Datatype
	194	#
0c43e0a1	195	my @size = $field->size;
	196	my $data_type = lc $field->data_type;
	197	my %extra = $field->extra;
	198	my $list = $extra{'list'} \|\| [];
d9397268	199	# \todo deal with embedded quotes
d9397268	200	my $commalist = "'" . join("','", @$list) . "'";
da8e499e	201	my $seq_name;
	202
	203	if ( $data_type eq 'enum' ) {
	204	my $len = 0;
	205	$len = ($len < length($_)) ? length($_) : $len for (@$list);
	206	my $check_name = mk_name( $table_name.'_'.$field_name, 'chk' );
0c43e0a1	207	push @constraint_defs,
da8e499e	208	"CONSTRAINT $check_name CHECK ($field_name IN ($commalist))";
0c43e0a1	209	$data_type = 'character varying';
da8e499e	210	}
	211	elsif ( $data_type eq 'set' ) {
	212	# XXX add a CHECK constraint maybe
	213	# (trickier and slower, than enum :)
0c43e0a1	214	# my $len = length $commalist;
	215	# $field_def .= " character varying($len) /* set $commalist */";
	216	$data_type = 'character varying';
da8e499e	217	}
0c43e0a1	218	elsif ( $field->is_auto_increment ) {
	219	$field_def .= ' serial';
	220	# $seq_name = mk_name( $table_name.'_'.$field_name, 'sq' );
	221	# push @sequence_defs, qq[DROP SEQUENCE "$seq_name";];
	222	# push @sequence_defs, qq[CREATE SEQUENCE "$seq_name";];
da8e499e	223	}
	224	else {
	225	$data_type = defined $translate{ $data_type } ?
	226	$translate{ $data_type } :
61aa0c9d	227	$data_type;
0c43e0a1	228	}
	229
	230	$field_def .= " $data_type";
	231
	232	if ( defined $size[0] && $size[0] > 0 ) {
	233	$field_def .= '(' . join( ', ', @size ) . ')';
f8f0253c	234	}
f8f0253c	235
da8e499e	236	#
	237	# Default value
	238	#
0c43e0a1	239	my $default = $field->default_value;
	240	if ( defined $default ) {
	241	$field_def .= sprintf( ' DEFAULT %s',
	242	( $field->is_auto_increment && $seq_name )
da8e499e	243	? qq[nextval('"$seq_name"'::text)] :
0c43e0a1	244	( $default =~ m/null/i ) ? 'NULL' : "'$default'"
da8e499e	245	);
da8e499e	246	}
f8f0253c	247
da8e499e	248	#
	249	# Not null constraint
	250	#
0c43e0a1	251	$field_def .= ' NOT NULL' unless $field->is_nullable;
f8f0253c	252
0c43e0a1	253	push @field_defs, $field_def;
f8f0253c	254	}
f8f0253c	255
f8f0253c	256	#
da8e499e	257	# Index Declarations
f8f0253c	258	#
0c43e0a1	259	my @index_defs = ();
da8e499e	260	my $idx_name_default;
0c43e0a1	261	for my $index ( $table->get_indices ) {
	262	my $name = $index->name \|\| '';
	263	my $type = $index->type \|\| NORMAL;
d8dcdb7a	264	my @fields =
	265	map { $_ =~ s/\(.+\)//; $_ }
	266	map { unreserve( $_, $table_name ) }
0c43e0a1	267	$index->fields;
da8e499e	268	next unless @fields;
da8e499e	269
0c43e0a1	270	if ( $type eq PRIMARY_KEY ) {
	271	$name \|\|= mk_name( $table_name, 'pk' );
	272	push @constraint_defs, 'CONSTRAINT '.$name.' PRIMARY KEY '.
da8e499e	273	'(' . join( ', ', @fields ) . ')';
da8e499e	274	}
0c43e0a1	275	elsif ( $type eq UNIQUE ) {
	276	$name \|\|= mk_name(
	277	$table_name, $name \|\| ++$idx_name_default
da8e499e	278	);
0c43e0a1	279	push @constraint_defs, 'CONSTRAINT ' . $name . ' UNIQUE ' .
da8e499e	280	'(' . join( ', ', @fields ) . ')';
da8e499e	281	}
0c43e0a1	282	elsif ( $type eq NORMAL ) {
	283	$name \|\|= mk_name(
	284	$table_name, $name \|\| ++$idx_name_default
da8e499e	285	);
0c43e0a1	286	push @index_defs,
0c43e0a1	287	qq[CREATE INDEX "$name" on $table_name_ur (].
da8e499e	288	join( ', ', @fields ).
	289	');';
	290	}
f8f0253c	291	else {
0c43e0a1	292	warn "Unknown index type ($type) on table $table_name.\n"
da8e499e	293	if $WARN;
f8f0253c	294	}
	295	}
	296
0c43e0a1	297	#
	298	# Table constraints
	299	#
	300	my $c_name_default;
	301	for my $c ( $table->get_constraints ) {
	302	my $name = $c->name \|\| '';
	303	my @fields =
	304	map { $_ =~ s/\(.+\)//; $_ }
	305	map { unreserve( $_, $table_name ) }
	306	$c->fields;
	307	my @rfields =
	308	map { $_ =~ s/\(.+\)//; $_ }
	309	map { unreserve( $_, $table_name ) }
	310	$c->reference_fields;
	311	next unless @fields;
	312
	313	if ( $c->type eq PRIMARY_KEY ) {
	314	$name \|\|= mk_name( $table_name, 'pk' );
	315	push @constraint_defs, "CONSTRAINT $name PRIMARY KEY ".
	316	'(' . join( ', ', @fields ) . ')';
	317	}
	318	elsif ( $c->type eq UNIQUE ) {
	319	$name \|\|= mk_name(
	320	$table_name, $name \|\| ++$c_name_default
	321	);
	322	push @constraint_defs, "CONSTRAINT $name UNIQUE " .
	323	'(' . join( ', ', @fields ) . ')';
	324	}
	325	elsif ( $c->type eq FOREIGN_KEY ) {
	326	my $def = join(' ',
	327	map { $_ \|\| () } 'FOREIGN KEY', $c->name
	328	);
	329
	330	$def .= ' (' . join( ', ', @fields ) . ')';
	331
	332	$def .= ' REFERENCES ' . $c->reference_table;
	333
	334	if ( @rfields ) {
	335	$def .= ' (' . join( ', ', @rfields ) . ')';
	336	}
	337
	338	if ( $c->match_type ) {
	339	$def .= ' MATCH ' .
	340	( $c->match_type =~ /full/i ) ? 'FULL' : 'PARTIAL';
	341	}
	342
	343	if ( $c->on_delete ) {
	344	$def .= ' ON DELETE '.join( ' ', $c->on_delete );
	345	}
	346
	347	if ( $c->on_update ) {
	348	$def .= ' ON UPDATE '.join( ' ', $c->on_update );
	349	}
	350
	351	push @constraint_defs, $def;
	352	}
	353	}
	354
da8e499e	355	my $create_statement;
	356	$create_statement = qq[DROP TABLE "$table_name_ur";\n]
	357	if $add_drop_table;
	358	$create_statement .= qq[CREATE TABLE "$table_name_ur" (\n].
0c43e0a1	359	join( ",\n", map { " $_" } @field_defs, @constraint_defs ).
da8e499e	360	"\n);"
	361	;
	362
	363	$output .= join( "\n\n",
	364	@comments,
0c43e0a1	365	@sequence_defs,
da8e499e	366	$create_statement,
0c43e0a1	367	@index_defs,
da8e499e	368	''
	369	);
	370	}
	371
	372	if ( $WARN ) {
	373	if ( %truncated ) {
	374	warn "Truncated " . keys( %truncated ) . " names:\n";
	375	warn "\t" . join( "\n\t", sort keys %truncated ) . "\n";
	376	}
	377
	378	if ( %unreserve ) {
	379	warn "Encounted " . keys( %unreserve ) .
	380	" unsafe names in schema (reserved or invalid):\n";
	381	warn "\t" . join( "\n\t", sort keys %unreserve ) . "\n";
	382	}
f8f0253c	383	}
f8f0253c	384
da8e499e	385	return $output;
f8f0253c	386	}
f8f0253c	387
96844cae	388	# -------------------------------------------------------------------
96844cae	389	sub mk_name {
0c43e0a1	390	my $basename = shift \|\| '';
	391	my $type = shift \|\| '';
	392	my $scope = shift \|\| '';
	393	my $critical = shift \|\| '';
96844cae	394	my $basename_orig = $basename;
2ad4c2c8	395	my $max_name = $type
	396	? $max_id_length - (length($type) + 1)
	397	: $max_id_length;
96844cae	398	$basename = substr( $basename, 0, $max_name )
	399	if length( $basename ) > $max_name;
	400	my $name = $type ? "${type}_$basename" : $basename;
	401
	402	if ( $basename ne $basename_orig and $critical ) {
	403	my $show_type = $type ? "+'$type'" : "";
	404	warn "Truncating '$basename_orig'$show_type to $max_id_length ",
	405	"character limit to make '$name'\n" if $WARN;
	406	$truncated{ $basename_orig } = $name;
	407	}
	408
	409	$scope \|\|= \%global_names;
	410	if ( my $prev = $scope->{ $name } ) {
	411	my $name_orig = $name;
	412	$name .= sprintf( "%02d", ++$prev );
	413	substr($name, $max_id_length - 3) = "00"
	414	if length( $name ) > $max_id_length;
	415
	416	warn "The name '$name_orig' has been changed to ",
	417	"'$name' to make it unique.\n" if $WARN;
	418
	419	$scope->{ $name_orig }++;
f8f0253c	420	}
96844cae	421
	422	$scope->{ $name }++;
	423	return $name;
	424	}
	425
	426	# -------------------------------------------------------------------
	427	sub unreserve {
0c43e0a1	428	my $name = shift \|\| '';
	429	my $schema_obj_name = shift \|\| '';
	430
96844cae	431	my ( $suffix ) = ( $name =~ s/(\W.*)$// ) ? $1 : '';
	432
	433	# also trap fields that don't begin with a letter
0c43e0a1	434	return $name if !$reserved{ uc $name } && $name =~ /^[a-z]/i;
96844cae	435
	436	if ( $schema_obj_name ) {
	437	++$unreserve{"$schema_obj_name.$name"};
	438	}
	439	else {
	440	++$unreserve{"$name (table name)"};
	441	}
	442
	443	my $unreserve = sprintf '%s_', $name;
	444	return $unreserve.$suffix;
f8f0253c	445	}
	446
	447	1;
f8f0253c	448
96844cae	449	# -------------------------------------------------------------------
	450	# Life is full of misery, loneliness, and suffering --
	451	# and it's all over much too soon.
	452	# Woody Allen
	453	# -------------------------------------------------------------------
f8f0253c	454
96844cae	455	=pod
f8f0253c	456
	457	=head1 AUTHOR
	458
	459	Ken Y. Clark E<lt>kclark@cpan.orgE<gt>
	460
	461	=cut