[dbsrgits/SQL-Translator.git] / lib / SQL / Translator / Producer / DB2.pm

package SQL::Translator::Producer::DB2;

# -------------------------------------------------------------------
# $Id$
# -------------------------------------------------------------------
# Copyright (C) 2002-2009 SQLFairy Authors
#
# 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::DB2 - DB2 SQL producer

=head1 SYNOPSIS

  use SQL::Translator;

  my $t = SQL::Translator->new( parser => '...', producer => 'DB2' );
  print $translator->translate( $file );

=head1 DESCRIPTION

Creates an SQL DDL suitable for DB2.

=cut

use warnings;
use strict;
use vars qw[ $DEBUG $WARN ];
$DEBUG   = 0 unless defined $DEBUG;

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


# http://publib.boulder.ibm.com/infocenter/db2help/topic/com.ibm.db2.udb.doc/ad/r0006844.htm

# This is a terrible WTDI, each Parser should parse down to some standard set
# of SQL data types, with field->extra entries being used to convert back to
# weird types like "polygon" if needed (IMO anyway)

my %dt_translate;
BEGIN {
  %dt_translate = (
    #
    # MySQL types
    #
    int        => 'integer',
    mediumint  => 'integer',
    tinyint    => 'smallint',
    char       => 'char',
    tinyblob   => 'blob',
    mediumblob => 'blob',
    longblob   => 'long varchar for bit data',
    tinytext   => 'varchar',
    text       => 'varchar',
    longtext   => 'varchar',
    mediumtext => 'varchar',
    enum       => 'varchar',
    set        => 'varchar',
    date       => 'date',
    datetime   => 'timestamp',
    time       => 'time',
    year       => 'date',

    #
    # PostgreSQL types
    #
    'double precision'  => 'double',
    serial              => 'integer',
    bigserial           => 'integer',
    money               => 'double',
    character           => 'char',
    'character varying' => 'varchar',
    bytea               => 'BLOB',
    interval            => 'integer',
    boolean             => 'smallint',
    point               => 'integer',
    line                => 'integer',
    lseg                => 'integer',
    box                 => 'integer',
    path                => 'integer',
    polygon             => 'integer',
    circle              => 'integer',
    cidr                => 'integer',
    inet                => 'varchar',
    macaddr             => 'varchar',
    bit                 => 'number',
    'bit varying'       => 'number',

    #
    # DB types
    #
    number              => 'integer',
    varchar2            => 'varchar',
    long                => 'clob',
);
}

my %db2_reserved = map { $_ => 1} qw/
ADD                DETERMINISTIC  LEAVE         RESTART
AFTER              DISALLOW       LEFT          RESTRICT
ALIAS              DISCONNECT     LIKE          RESULT
ALL                DISTINCT       LINKTYPE      RESULT_SET_LOCATOR
ALLOCATE           DO             LOCAL         RETURN
ALLOW              DOUBLE         LOCALE        RETURNS
ALTER              DROP           LOCATOR       REVOKE
AND                DSNHATTR       LOCATORS      RIGHT
ANY                DSSIZE         LOCK          ROLLBACK
APPLICATION        DYNAMIC        LOCKMAX       ROUTINE
AS                 EACH           LOCKSIZE      ROW
ASSOCIATE          EDITPROC       LONG          ROWS
ASUTIME            ELSE           LOOP          RRN
AUDIT              ELSEIF         MAXVALUE      RUN
AUTHORIZATION      ENCODING       MICROSECOND   SAVEPOINT
AUX                END            MICROSECONDS  SCHEMA
AUXILIARY          END-EXEC       MINUTE        SCRATCHPAD
BEFORE             END-EXEC1      MINUTES       SECOND
BEGIN              ERASE          MINVALUE      SECONDS
BETWEEN            ESCAPE         MODE          SECQTY
BINARY             EXCEPT         MODIFIES      SECURITY
BUFFERPOOL         EXCEPTION      MONTH         SELECT
BY                 EXCLUDING      MONTHS        SENSITIVE
CACHE              EXECUTE        NEW           SET
CALL               EXISTS         NEW_TABLE     SIGNAL
CALLED             EXIT           NO            SIMPLE
CAPTURE            EXTERNAL       NOCACHE       SOME
CARDINALITY        FENCED         NOCYCLE       SOURCE
CASCADED           FETCH          NODENAME      SPECIFIC
CASE               FIELDPROC      NODENUMBER    SQL
CAST               FILE           NOMAXVALUE    SQLID
CCSID              FINAL          NOMINVALUE    STANDARD
CHAR               FOR            NOORDER       START
CHARACTER          FOREIGN        NOT           STATIC
CHECK              FREE           NULL          STAY
CLOSE              FROM           NULLS         STOGROUP
CLUSTER            FULL           NUMPARTS      STORES
COLLECTION         FUNCTION       OBID          STYLE
COLLID             GENERAL        OF            SUBPAGES
COLUMN             GENERATED      OLD           SUBSTRING
COMMENT            GET            OLD_TABLE     SYNONYM
COMMIT             GLOBAL         ON            SYSFUN
CONCAT             GO             OPEN          SYSIBM
CONDITION          GOTO           OPTIMIZATION  SYSPROC
CONNECT            GRANT          OPTIMIZE      SYSTEM
CONNECTION         GRAPHIC        OPTION        TABLE
CONSTRAINT         GROUP          OR            TABLESPACE
CONTAINS           HANDLER        ORDER         THEN
CONTINUE           HAVING         OUT           TO
COUNT              HOLD           OUTER         TRANSACTION
COUNT_BIG          HOUR           OVERRIDING    TRIGGER
CREATE             HOURS          PACKAGE       TRIM
CROSS              IDENTITY       PARAMETER     TYPE
CURRENT            IF             PART          UNDO
CURRENT_DATE       IMMEDIATE      PARTITION     UNION
CURRENT_LC_CTYPE   IN             PATH          UNIQUE
CURRENT_PATH       INCLUDING      PIECESIZE     UNTIL
CURRENT_SERVER     INCREMENT      PLAN          UPDATE
CURRENT_TIME       INDEX          POSITION      USAGE
CURRENT_TIMESTAMP  INDICATOR      PRECISION     USER
CURRENT_TIMEZONE   INHERIT        PREPARE       USING
CURRENT_USER       INNER          PRIMARY       VALIDPROC
CURSOR             INOUT          PRIQTY        VALUES
CYCLE              INSENSITIVE    PRIVILEGES    VARIABLE
DATA               INSERT         PROCEDURE     VARIANT
DATABASE           INTEGRITY      PROGRAM       VCAT
DAY                INTO           PSID          VIEW
DAYS               IS             QUERYNO       VOLUMES
DB2GENERAL         ISOBID         READ          WHEN
DB2GENRL           ISOLATION      READS         WHERE
DB2SQL             ITERATE        RECOVERY      WHILE
DBINFO             JAR            REFERENCES    WITH
DECLARE            JAVA           REFERENCING   WLM
DEFAULT            JOIN           RELEASE       WRITE
DEFAULTS           KEY            RENAME        YEAR
DEFINITION         LABEL          REPEAT        YEARS
DELETE             LANGUAGE       RESET
DESCRIPTOR         LC_CTYPE       RESIGNAL 
/;

#------------------------------------------------------------------------------

sub produce
{
    my ($translator) = @_;
    $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         = '';
    my $indent         = '    ';

    $output .= header_comment unless($no_comments);
    my (@table_defs, @fks, @index_defs);
    foreach my $table ($schema->get_tables)
    {
        push @table_defs, 'DROP TABLE ' . $table->name . ";" if $add_drop_table;
        my ($table_def, $fks) = create_table($table, {
            no_comments => $no_comments});
        push @table_defs, $table_def;
        push @fks, @$fks;

        foreach my $index ($table->get_indices)
        {
            push @index_defs, create_index($index);
        }

    }   
    my (@view_defs);
    foreach my $view ( $schema->get_views )
    {
        push @view_defs, create_view($view);
    }
    my (@trigger_defs);
    foreach my $trigger ( $schema->get_triggers )
    {
        push @trigger_defs, create_trigger($trigger);
    }

    return wantarray ? (@table_defs, @fks, @index_defs, @view_defs, @trigger_defs) :
        $output . join("\n\n", @table_defs, @fks, @index_defs, @view_defs, @trigger_defs) . "\n";
}

{ my %objnames;

    sub check_name
    {
        my ($name, $type, $length) = @_;

        my $newname = $name;
        if(length($name) > $length)   ## Maximum table name length is 18
        {
            warn "Table name $name is longer than $length characters, truncated" if $WARN;
#             if(grep {$_ eq substr($name, 0, $length) } 
#                               values(%{$objnames{$type}}))
#             {
#                 die "Got multiple matching table names when truncated";
#             }
#             $objnames{$type}{$name} = substr($name, 0,$length);
#             $newname = $objnames{$type}{$name};
        }

        if($db2_reserved{uc($newname)})
        {
            warn "$newname is a reserved word in DB2!" if $WARN;
        }

#        return sprintf("%-*s", $length-5, $newname);
        return $newname;
    }
}

sub create_table
{
    my ($table, $options) = @_;

    my $table_name = check_name($table->name, 'tables', 128); 
    # this limit is 18 in older DB2s ! (<= 8)

    my (@field_defs, @comments);
    push @comments, "--\n-- Table: $table_name\n--" unless $options->{no_comments};
    foreach my $field ($table->get_fields)
    {
        push @field_defs, create_field($field);
    }
    my (@con_defs, @fks);
    foreach my $con ($table->get_constraints)
    {
        my ($cdefs, $fks) = create_constraint($con);
        push @con_defs, @$cdefs;
        push @fks, @$fks;
    }

    my $tablespace = $table->extra()->{'TABLESPACE'} || '';
    my $table_def = "CREATE TABLE $table_name (\n";
    $table_def .= join (",\n", map { "  $_" } @field_defs, @con_defs);
    $table_def .= "\n)";
    $table_def .= $tablespace ? "IN $tablespace;" : ';';

    return $table_def, \@fks;
}

sub create_field
{
    my ($field) = @_;
    
    my $field_name = check_name($field->name, 'fields', 30);
#    use Data::Dumper;
#    print Dumper(\%dt_translate);
#    print $field->data_type, " ", $dt_translate{lc($field->data_type)}, "\n";
    my $data_type = uc($dt_translate{lc($field->data_type)} || $field->data_type);
    my $size = $field->size();

    my $field_def = "$field_name $data_type";
    $field_def .= $field->is_auto_increment ? 
        ' GENERATED BY DEFAULT AS IDENTITY (START WITH 1, INCREMENT BY 1)' : '';
    $field_def .= $data_type =~ /(CHAR|CLOB)/i ? "(${size})" : '';
    $field_def .= !$field->is_nullable ? ' NOT NULL':'';
#            $field_def .= $field->is_primary_key ? ' PRIMARY KEY':'';
    $field_def .= !defined $field->default_value ? '' : 
        $field->default_value =~ /current( |_)timestamp/i ||
        $field->default_value =~ /\Qnow()\E/i ? 
        ' DEFAULT CURRENT TIMESTAMP' : defined $field->default_value ?
        (" DEFAULT " . ($data_type =~ /(INT|DOUBLE)/i ? 
                        $field->default_value : "'" . $field->default_value . "'")
         ) : '';

    return $field_def;
}

sub create_index
{
    my ($index) = @_;

    my $out = sprintf('CREATE %sINDEX %s ON %s ( %s );',
                      $index->type() =~ /^UNIQUE$/i ? 'UNIQUE' : '',
                      $index->name,
                      $index->table->name,
                      join(', ', $index->fields) );

    return $out;
}

sub create_constraint
{
    my ($constraint) = @_;

    my (@con_defs, @fks);

    my $ctype =  $constraint->type =~ /^PRIMARY(_|\s)KEY$/i ? 'PRIMARY KEY' :
                 $constraint->type =~ /^UNIQUE$/i      ? 'UNIQUE' :
                 $constraint->type =~ /^CHECK_C$/i     ? 'CHECK' :
                 $constraint->type =~ /^FOREIGN(_|\s)KEY$/i ? 'FOREIGN KEY' : '';

    my $expr = $constraint->type =~ /^CHECK_C$/i ? $constraint->expression :
        '';
    my $ref = $constraint->type =~ /^FOREIGN(_|\s)KEY$/i ? ('REFERENCES ' . $constraint->reference_table . '(' . join(', ', $constraint->reference_fields) . ')') : '';
    my $update = $constraint->on_update ? $constraint->on_update : '';
    my $delete = $constraint->on_delete ? $constraint->on_delete : '';

    my $out = join(' ', grep { $_ }
                      $constraint->name ? ('CONSTRAINT ' . $constraint->name) : '',
                      $ctype,
                      '(' . join (', ', $constraint->fields) . ')',
                      $expr ? $expr : $ref,
                      $update,
                      $delete);
    if ($constraint->type eq FOREIGN_KEY) {
        my $table_name = $constraint->table->name;
        $out = "ALTER TABLE $table_name ADD $out;";
        push @fks, $out;
    }
    else {
        push @con_defs, $out;
    }

    return \@con_defs, \@fks;
                      
}

sub create_view
{
    my ($view) = @_;

    my $out = sprintf("CREATE VIEW %s AS\n%s;",
                      $view->name,
                      $view->sql);

    return $out;
}

sub create_trigger
{
    my ($trigger) = @_;
# create: CREATE TRIGGER trigger_name before type /ON/i table_name reference_b(?) /FOR EACH ROW/i 'MODE DB2SQL' triggered_action

    my $out = sprintf('CREATE TRIGGER %s %s %s ON %s %s %s MODE DB2SQL %s',
                      $trigger->name,
                      $trigger->perform_action_when || 'AFTER',
                      $trigger->database_event =~ /update_on/i ? 
                        ('UPDATE OF '. join(', ', $trigger->fields)) :
                        $trigger->database_event || 'UPDATE',
                      $trigger->table->name,
                      $trigger->extra->{reference} || 'REFERENCING OLD AS oldrow NEW AS newrow',
                      $trigger->extra->{granularity} || 'FOR EACH ROW',
                      $trigger->action );

    return $out;
                      
}

sub alter_field
{
    my ($from_field, $to_field) = @_;

    my $data_type = uc($dt_translate{lc($to_field->data_type)} || $to_field->data_type);

    my $size = $to_field->size();
    $data_type .= $data_type =~ /CHAR/i ? "(${size})" : '';

    # DB2 will only allow changing of varchar/vargraphic datatypes
    # to extend their lengths. Or changing of text types to other
    # texttypes, and numeric types to larger numeric types. (v8)
    # We can also drop/add keys, checks and constraints, but not
    # columns !?

    my $out = sprintf('ALTER TABLE %s ALTER %s SET DATATYPE %s',
                      $to_field->table->name,
                      $to_field->name,
                      $data_type);

}

sub add_field
{
    my ($new_field) = @_;

    my $out = sprintf('ALTER TABLE %s ADD COLUMN %s',
                      $new_field->table->name,
                      create_field($new_field));

    return $out;
}

sub drop_field
{
    my ($field) = @_;

    return '';
}
1;
Commit	Line	Data
04bc93b6	1	package SQL::Translator::Producer::DB2;
	2
	3	# -------------------------------------------------------------------
821a0fde	4	# $Id$
04bc93b6	5	# -------------------------------------------------------------------
478f608d	6	# Copyright (C) 2002-2009 SQLFairy Authors
04bc93b6	7	#
	8	# This program is free software; you can redistribute it and/or
	9	# modify it under the terms of the GNU General Public License as
	10	# published by the Free Software Foundation; version 2.
	11	#
	12	# This program is distributed in the hope that it will be useful, but
	13	# WITHOUT ANY WARRANTY; without even the implied warranty of
	14	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	# General Public License for more details.
	16	#
	17	# You should have received a copy of the GNU General Public License
	18	# along with this program; if not, write to the Free Software
	19	# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
	20	# 02111-1307 USA
	21	# -------------------------------------------------------------------
04bc93b6	22	=head1 NAME
	23
	24	SQL::Translator::Producer::DB2 - DB2 SQL producer
	25
	26	=head1 SYNOPSIS
	27
	28	use SQL::Translator;
	29
	30	my $t = SQL::Translator->new( parser => '...', producer => 'DB2' );
	31	print $translator->translate( $file );
	32
	33	=head1 DESCRIPTION
	34
a0ea6c87	35	Creates an SQL DDL suitable for DB2.
04bc93b6	36
	37	=cut
	38
a0ea6c87	39	use warnings;
04bc93b6	40	use strict;
478f608d	41	use vars qw[ $DEBUG $WARN ];
04bc93b6	42	$DEBUG = 0 unless defined $DEBUG;
	43
	44	use SQL::Translator::Schema::Constants;
	45	use SQL::Translator::Utils qw(header_comment);
	46
	47
	48	# http://publib.boulder.ibm.com/infocenter/db2help/topic/com.ibm.db2.udb.doc/ad/r0006844.htm
	49
	50	# This is a terrible WTDI, each Parser should parse down to some standard set
	51	# of SQL data types, with field->extra entries being used to convert back to
	52	# weird types like "polygon" if needed (IMO anyway)
	53
3866f0ff	54	my %dt_translate;
5e2c196a	55	BEGIN {
5e2c196a	56	%dt_translate = (
04bc93b6	57	#
	58	# MySQL types
	59	#
	60	int => 'integer',
	61	mediumint => 'integer',
	62	tinyint => 'smallint',
	63	char => 'char',
	64	tinyblob => 'blob',
	65	mediumblob => 'blob',
	66	longblob => 'long varchar for bit data',
	67	tinytext => 'varchar',
a0ea6c87	68	text => 'varchar',
	69	longtext => 'varchar',
	70	mediumtext => 'varchar',
04bc93b6	71	enum => 'varchar',
	72	set => 'varchar',
	73	date => 'date',
	74	datetime => 'timestamp',
	75	time => 'time',
	76	year => 'date',
	77
	78	#
	79	# PostgreSQL types
	80	#
	81	'double precision' => 'double',
	82	serial => 'integer',
	83	bigserial => 'integer',
	84	money => 'double',
	85	character => 'char',
	86	'character varying' => 'varchar',
	87	bytea => 'BLOB',
	88	interval => 'integer',
	89	boolean => 'smallint',
	90	point => 'integer',
	91	line => 'integer',
	92	lseg => 'integer',
	93	box => 'integer',
	94	path => 'integer',
	95	polygon => 'integer',
	96	circle => 'integer',
	97	cidr => 'integer',
	98	inet => 'varchar',
	99	macaddr => 'varchar',
	100	bit => 'number',
	101	'bit varying' => 'number',
	102
	103	#
	104	# DB types
	105	#
	106	number => 'integer',
	107	varchar2 => 'varchar',
	108	long => 'clob',
	109	);
5e2c196a	110	}
04bc93b6	111
	112	my %db2_reserved = map { $_ => 1} qw/
	113	ADD DETERMINISTIC LEAVE RESTART
	114	AFTER DISALLOW LEFT RESTRICT
	115	ALIAS DISCONNECT LIKE RESULT
	116	ALL DISTINCT LINKTYPE RESULT_SET_LOCATOR
	117	ALLOCATE DO LOCAL RETURN
	118	ALLOW DOUBLE LOCALE RETURNS
	119	ALTER DROP LOCATOR REVOKE
	120	AND DSNHATTR LOCATORS RIGHT
	121	ANY DSSIZE LOCK ROLLBACK
	122	APPLICATION DYNAMIC LOCKMAX ROUTINE
	123	AS EACH LOCKSIZE ROW
	124	ASSOCIATE EDITPROC LONG ROWS
	125	ASUTIME ELSE LOOP RRN
	126	AUDIT ELSEIF MAXVALUE RUN
	127	AUTHORIZATION ENCODING MICROSECOND SAVEPOINT
	128	AUX END MICROSECONDS SCHEMA
	129	AUXILIARY END-EXEC MINUTE SCRATCHPAD
	130	BEFORE END-EXEC1 MINUTES SECOND
	131	BEGIN ERASE MINVALUE SECONDS
	132	BETWEEN ESCAPE MODE SECQTY
	133	BINARY EXCEPT MODIFIES SECURITY
	134	BUFFERPOOL EXCEPTION MONTH SELECT
	135	BY EXCLUDING MONTHS SENSITIVE
	136	CACHE EXECUTE NEW SET
	137	CALL EXISTS NEW_TABLE SIGNAL
	138	CALLED EXIT NO SIMPLE
	139	CAPTURE EXTERNAL NOCACHE SOME
	140	CARDINALITY FENCED NOCYCLE SOURCE
	141	CASCADED FETCH NODENAME SPECIFIC
	142	CASE FIELDPROC NODENUMBER SQL
	143	CAST FILE NOMAXVALUE SQLID
	144	CCSID FINAL NOMINVALUE STANDARD
	145	CHAR FOR NOORDER START
	146	CHARACTER FOREIGN NOT STATIC
	147	CHECK FREE NULL STAY
	148	CLOSE FROM NULLS STOGROUP
	149	CLUSTER FULL NUMPARTS STORES
	150	COLLECTION FUNCTION OBID STYLE
	151	COLLID GENERAL OF SUBPAGES
	152	COLUMN GENERATED OLD SUBSTRING
	153	COMMENT GET OLD_TABLE SYNONYM
	154	COMMIT GLOBAL ON SYSFUN
	155	CONCAT GO OPEN SYSIBM
	156	CONDITION GOTO OPTIMIZATION SYSPROC
	157	CONNECT GRANT OPTIMIZE SYSTEM
	158	CONNECTION GRAPHIC OPTION TABLE
	159	CONSTRAINT GROUP OR TABLESPACE
	160	CONTAINS HANDLER ORDER THEN
	161	CONTINUE HAVING OUT TO
	162	COUNT HOLD OUTER TRANSACTION
	163	COUNT_BIG HOUR OVERRIDING TRIGGER
	164	CREATE HOURS PACKAGE TRIM
	165	CROSS IDENTITY PARAMETER TYPE
	166	CURRENT IF PART UNDO
	167	CURRENT_DATE IMMEDIATE PARTITION UNION
	168	CURRENT_LC_CTYPE IN PATH UNIQUE
	169	CURRENT_PATH INCLUDING PIECESIZE UNTIL
	170	CURRENT_SERVER INCREMENT PLAN UPDATE
	171	CURRENT_TIME INDEX POSITION USAGE
	172	CURRENT_TIMESTAMP INDICATOR PRECISION USER
	173	CURRENT_TIMEZONE INHERIT PREPARE USING
	174	CURRENT_USER INNER PRIMARY VALIDPROC
175	CURSOR INOUT PRIQTY VALUES
176	CYCLE INSENSITIVE PRIVILEGES VARIABLE
177	DATA INSERT PROCEDURE VARIANT
178	DATABASE INTEGRITY PROGRAM VCAT
179	DAY INTO PSID VIEW
180	DAYS IS QUERYNO VOLUMES
181	DB2GENERAL ISOBID READ WHEN
182	DB2GENRL ISOLATION READS WHERE
183	DB2SQL ITERATE RECOVERY WHILE
184	DBINFO JAR REFERENCES WITH
185	DECLARE JAVA REFERENCING WLM
186	DEFAULT JOIN RELEASE WRITE
187	DEFAULTS KEY RENAME YEAR
188	DEFINITION LABEL REPEAT YEARS
189	DELETE LANGUAGE RESET
190	DESCRIPTOR LC_CTYPE RESIGNAL
191	/;
192
193	#------------------------------------------------------------------------------
194
195	sub produce
196	{
197	my ($translator) = @_;
198	$DEBUG = $translator->debug;
199	$WARN = $translator->show_warnings;
200	my $no_comments = $translator->no_comments;
201	my $add_drop_table = $translator->add_drop_table;
202	my $schema = $translator->schema;
203	my $output = '';
204	my $indent = ' ';
205
206	$output .= header_comment unless($no_comments);
b08b5416	207	my (@table_defs, @fks, @index_defs);
04bc93b6	208	foreach my $table ($schema->get_tables)
04bc93b6	209	{
5e2c196a	210	push @table_defs, 'DROP TABLE ' . $table->name . ";" if $add_drop_table;
b08b5416	211	my ($table_def, $fks) = create_table($table, {
a0ea6c87	212	no_comments => $no_comments});
b08b5416	213	push @table_defs, $table_def;
b08b5416	214	push @fks, @$fks;
04bc93b6	215
a0ea6c87	216	foreach my $index ($table->get_indices)
04bc93b6	217	{
a0ea6c87	218	push @index_defs, create_index($index);
04bc93b6	219	}
a0ea6c87	220
04bc93b6	221	}
a0ea6c87	222	my (@view_defs);
	223	foreach my $view ( $schema->get_views )
	224	{
	225	push @view_defs, create_view($view);
	226	}
	227	my (@trigger_defs);
	228	foreach my $trigger ( $schema->get_triggers )
	229	{
	230	push @trigger_defs, create_trigger($trigger);
	231	}
04bc93b6	232
b08b5416	233	return wantarray ? (@table_defs, @fks, @index_defs, @view_defs, @trigger_defs) :
b08b5416	234	$output . join("\n\n", @table_defs, @fks, @index_defs, @view_defs, @trigger_defs) . "\n";
04bc93b6	235	}
	236
	237	{ my %objnames;
	238
	239	sub check_name
	240	{
	241	my ($name, $type, $length) = @_;
	242
	243	my $newname = $name;
	244	if(length($name) > $length) ## Maximum table name length is 18
	245	{
	246	warn "Table name $name is longer than $length characters, truncated" if $WARN;
a0ea6c87	247	# if(grep {$_ eq substr($name, 0, $length) }
	248	# values(%{$objnames{$type}}))
	249	# {
	250	# die "Got multiple matching table names when truncated";
	251	# }
	252	# $objnames{$type}{$name} = substr($name, 0,$length);
	253	# $newname = $objnames{$type}{$name};
04bc93b6	254	}
	255
	256	if($db2_reserved{uc($newname)})
	257	{
	258	warn "$newname is a reserved word in DB2!" if $WARN;
	259	}
	260
5e2c196a	261	# return sprintf("%-*s", $length-5, $newname);
5e2c196a	262	return $newname;
04bc93b6	263	}
	264	}
	265
a0ea6c87	266	sub create_table
	267	{
	268	my ($table, $options) = @_;
	269
	270	my $table_name = check_name($table->name, 'tables', 128);
	271	# this limit is 18 in older DB2s ! (<= 8)
	272
	273	my (@field_defs, @comments);
	274	push @comments, "--\n-- Table: $table_name\n--" unless $options->{no_comments};
	275	foreach my $field ($table->get_fields)
	276	{
	277	push @field_defs, create_field($field);
	278	}
b08b5416	279	my (@con_defs, @fks);
a0ea6c87	280	foreach my $con ($table->get_constraints)
a0ea6c87	281	{
b08b5416	282	my ($cdefs, $fks) = create_constraint($con);
	283	push @con_defs, @$cdefs;
	284	push @fks, @$fks;
a0ea6c87	285	}
a0ea6c87	286
	287	my $tablespace = $table->extra()->{'TABLESPACE'} \|\| '';
	288	my $table_def = "CREATE TABLE $table_name (\n";
b08b5416	289	$table_def .= join (",\n", map { " $_" } @field_defs, @con_defs);
a0ea6c87	290	$table_def .= "\n)";
	291	$table_def .= $tablespace ? "IN $tablespace;" : ';';
	292
b08b5416	293	return $table_def, \@fks;
a0ea6c87	294	}
	295
	296	sub create_field
	297	{
	298	my ($field) = @_;
	299
	300	my $field_name = check_name($field->name, 'fields', 30);
	301	# use Data::Dumper;
	302	# print Dumper(\%dt_translate);
	303	# print $field->data_type, " ", $dt_translate{lc($field->data_type)}, "\n";
	304	my $data_type = uc($dt_translate{lc($field->data_type)} \|\| $field->data_type);
	305	my $size = $field->size();
	306
	307	my $field_def = "$field_name $data_type";
	308	$field_def .= $field->is_auto_increment ?
3866f0ff	309	' GENERATED BY DEFAULT AS IDENTITY (START WITH 1, INCREMENT BY 1)' : '';
b08b5416	310	$field_def .= $data_type =~ /(CHAR\|CLOB)/i ? "(${size})" : '';
a0ea6c87	311	$field_def .= !$field->is_nullable ? ' NOT NULL':'';
	312	# $field_def .= $field->is_primary_key ? ' PRIMARY KEY':'';
	313	$field_def .= !defined $field->default_value ? '' :
	314	$field->default_value =~ /current( \|_)timestamp/i \|\|
	315	$field->default_value =~ /\Qnow()\E/i ?
b08b5416	316	' DEFAULT CURRENT TIMESTAMP' : defined $field->default_value ?
	317	(" DEFAULT " . ($data_type =~ /(INT\|DOUBLE)/i ?
	318	$field->default_value : "'" . $field->default_value . "'")
	319	) : '';
a0ea6c87	320
5e2c196a	321	return $field_def;
a0ea6c87	322	}
	323
	324	sub create_index
	325	{
	326	my ($index) = @_;
	327
	328	my $out = sprintf('CREATE %sINDEX %s ON %s ( %s );',
	329	$index->type() =~ /^UNIQUE$/i ? 'UNIQUE' : '',
	330	$index->name,
	331	$index->table->name,
	332	join(', ', $index->fields) );
	333
	334	return $out;
	335	}
	336
	337	sub create_constraint
	338	{
	339	my ($constraint) = @_;
	340
b08b5416	341	my (@con_defs, @fks);
a0ea6c87	342
	343	my $ctype = $constraint->type =~ /^PRIMARY(_\|\s)KEY$/i ? 'PRIMARY KEY' :
	344	$constraint->type =~ /^UNIQUE$/i ? 'UNIQUE' :
	345	$constraint->type =~ /^CHECK_C$/i ? 'CHECK' :
b08b5416	346	$constraint->type =~ /^FOREIGN(_\|\s)KEY$/i ? 'FOREIGN KEY' : '';
a0ea6c87	347
	348	my $expr = $constraint->type =~ /^CHECK_C$/i ? $constraint->expression :
	349	'';
b08b5416	350	my $ref = $constraint->type =~ /^FOREIGN(_\|\s)KEY$/i ? ('REFERENCES ' . $constraint->reference_table . '(' . join(', ', $constraint->reference_fields) . ')') : '';
a0ea6c87	351	my $update = $constraint->on_update ? $constraint->on_update : '';
	352	my $delete = $constraint->on_delete ? $constraint->on_delete : '';
	353
b08b5416	354	my $out = join(' ', grep { $_ }
a0ea6c87	355	$constraint->name ? ('CONSTRAINT ' . $constraint->name) : '',
	356	$ctype,
	357	'(' . join (', ', $constraint->fields) . ')',
	358	$expr ? $expr : $ref,
	359	$update,
	360	$delete);
b08b5416	361	if ($constraint->type eq FOREIGN_KEY) {
	362	my $table_name = $constraint->table->name;
	363	$out = "ALTER TABLE $table_name ADD $out;";
	364	push @fks, $out;
	365	}
	366	else {
	367	push @con_defs, $out;
	368	}
a0ea6c87	369
b08b5416	370	return \@con_defs, \@fks;
a0ea6c87	371
	372	}
	373
	374	sub create_view
	375	{
	376	my ($view) = @_;
	377
	378	my $out = sprintf("CREATE VIEW %s AS\n%s;",
	379	$view->name,
	380	$view->sql);
	381
	382	return $out;
	383	}
	384
	385	sub create_trigger
	386	{
	387	my ($trigger) = @_;
	388	# create: CREATE TRIGGER trigger_name before type /ON/i table_name reference_b(?) /FOR EACH ROW/i 'MODE DB2SQL' triggered_action
	389
	390	my $out = sprintf('CREATE TRIGGER %s %s %s ON %s %s %s MODE DB2SQL %s',
	391	$trigger->name,
	392	$trigger->perform_action_when \|\| 'AFTER',
	393	$trigger->database_event =~ /update_on/i ?
	394	('UPDATE OF '. join(', ', $trigger->fields)) :
	395	$trigger->database_event \|\| 'UPDATE',
5e2c196a	396	$trigger->table->name,
a0ea6c87	397	$trigger->extra->{reference} \|\| 'REFERENCING OLD AS oldrow NEW AS newrow',
	398	$trigger->extra->{granularity} \|\| 'FOR EACH ROW',
	399	$trigger->action );
	400
	401	return $out;
	402
	403	}
	404
	405	sub alter_field
	406	{
	407	my ($from_field, $to_field) = @_;
5e2c196a	408
	409	my $data_type = uc($dt_translate{lc($to_field->data_type)} \|\| $to_field->data_type);
	410
	411	my $size = $to_field->size();
	412	$data_type .= $data_type =~ /CHAR/i ? "(${size})" : '';
	413
	414	# DB2 will only allow changing of varchar/vargraphic datatypes
	415	# to extend their lengths. Or changing of text types to other
	416	# texttypes, and numeric types to larger numeric types. (v8)
	417	# We can also drop/add keys, checks and constraints, but not
	418	# columns !?
	419
	420	my $out = sprintf('ALTER TABLE %s ALTER %s SET DATATYPE %s',
	421	$to_field->table->name,
	422	$to_field->name,
	423	$data_type);
	424
a0ea6c87	425	}
	426
	427	sub add_field
	428	{
5e2c196a	429	my ($new_field) = @_;
	430
	431	my $out = sprintf('ALTER TABLE %s ADD COLUMN %s',
	432	$new_field->table->name,
	433	create_field($new_field));
	434
	435	return $out;
a0ea6c87	436	}
	437
	438	sub drop_field
	439	{
	440	my ($field) = @_;
5e2c196a	441
5e2c196a	442	return '';
a0ea6c87	443	}
04bc93b6	444	1;