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

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

# -------------------------------------------------------------------
# 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[ $VERSION $DEBUG $WARN ];
$VERSION = '1.99';
$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	# -------------------------------------------------------------------
478f608d	4	# Copyright (C) 2002-2009 SQLFairy Authors
04bc93b6	5	#
	6	# This program is free software; you can redistribute it and/or
	7	# modify it under the terms of the GNU General Public License as
	8	# published by the Free Software Foundation; version 2.
	9	#
	10	# This program is distributed in the hope that it will be useful, but
	11	# WITHOUT ANY WARRANTY; without even the implied warranty of
	12	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	# General Public License for more details.
	14	#
	15	# You should have received a copy of the GNU General Public License
	16	# along with this program; if not, write to the Free Software
	17	# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
	18	# 02111-1307 USA
	19	# -------------------------------------------------------------------
04bc93b6	20	=head1 NAME
	21
	22	SQL::Translator::Producer::DB2 - DB2 SQL producer
	23
	24	=head1 SYNOPSIS
	25
	26	use SQL::Translator;
	27
	28	my $t = SQL::Translator->new( parser => '...', producer => 'DB2' );
	29	print $translator->translate( $file );
	30
	31	=head1 DESCRIPTION
	32
a0ea6c87	33	Creates an SQL DDL suitable for DB2.
04bc93b6	34
	35	=cut
	36
a0ea6c87	37	use warnings;
04bc93b6	38	use strict;
da06ac74	39	use vars qw[ $VERSION $DEBUG $WARN ];
da06ac74	40	$VERSION = '1.99';
04bc93b6	41	$DEBUG = 0 unless defined $DEBUG;
	42
	43	use SQL::Translator::Schema::Constants;
	44	use SQL::Translator::Utils qw(header_comment);
	45
	46
	47	# http://publib.boulder.ibm.com/infocenter/db2help/topic/com.ibm.db2.udb.doc/ad/r0006844.htm
	48
	49	# This is a terrible WTDI, each Parser should parse down to some standard set
	50	# of SQL data types, with field->extra entries being used to convert back to
	51	# weird types like "polygon" if needed (IMO anyway)
	52
3866f0ff	53	my %dt_translate;
5e2c196a	54	BEGIN {
5e2c196a	55	%dt_translate = (
04bc93b6	56	#
	57	# MySQL types
	58	#
	59	int => 'integer',
	60	mediumint => 'integer',
	61	tinyint => 'smallint',
	62	char => 'char',
	63	tinyblob => 'blob',
	64	mediumblob => 'blob',
	65	longblob => 'long varchar for bit data',
	66	tinytext => 'varchar',
a0ea6c87	67	text => 'varchar',
	68	longtext => 'varchar',
	69	mediumtext => 'varchar',
04bc93b6	70	enum => 'varchar',
	71	set => 'varchar',
	72	date => 'date',
	73	datetime => 'timestamp',
	74	time => 'time',
	75	year => 'date',
	76
	77	#
	78	# PostgreSQL types
	79	#
	80	'double precision' => 'double',
	81	serial => 'integer',
	82	bigserial => 'integer',
	83	money => 'double',
	84	character => 'char',
	85	'character varying' => 'varchar',
	86	bytea => 'BLOB',
	87	interval => 'integer',
	88	boolean => 'smallint',
	89	point => 'integer',
	90	line => 'integer',
	91	lseg => 'integer',
	92	box => 'integer',
	93	path => 'integer',
	94	polygon => 'integer',
	95	circle => 'integer',
	96	cidr => 'integer',
	97	inet => 'varchar',
	98	macaddr => 'varchar',
	99	bit => 'number',
	100	'bit varying' => 'number',
	101
	102	#
	103	# DB types
	104	#
	105	number => 'integer',
	106	varchar2 => 'varchar',
	107	long => 'clob',
	108	);
5e2c196a	109	}
04bc93b6	110
	111	my %db2_reserved = map { $_ => 1} qw/
	112	ADD DETERMINISTIC LEAVE RESTART
	113	AFTER DISALLOW LEFT RESTRICT
	114	ALIAS DISCONNECT LIKE RESULT
	115	ALL DISTINCT LINKTYPE RESULT_SET_LOCATOR
	116	ALLOCATE DO LOCAL RETURN
	117	ALLOW DOUBLE LOCALE RETURNS
	118	ALTER DROP LOCATOR REVOKE
	119	AND DSNHATTR LOCATORS RIGHT
	120	ANY DSSIZE LOCK ROLLBACK
	121	APPLICATION DYNAMIC LOCKMAX ROUTINE
	122	AS EACH LOCKSIZE ROW
	123	ASSOCIATE EDITPROC LONG ROWS
	124	ASUTIME ELSE LOOP RRN
	125	AUDIT ELSEIF MAXVALUE RUN
	126	AUTHORIZATION ENCODING MICROSECOND SAVEPOINT
	127	AUX END MICROSECONDS SCHEMA
	128	AUXILIARY END-EXEC MINUTE SCRATCHPAD
	129	BEFORE END-EXEC1 MINUTES SECOND
	130	BEGIN ERASE MINVALUE SECONDS
	131	BETWEEN ESCAPE MODE SECQTY
	132	BINARY EXCEPT MODIFIES SECURITY
	133	BUFFERPOOL EXCEPTION MONTH SELECT
	134	BY EXCLUDING MONTHS SENSITIVE
	135	CACHE EXECUTE NEW SET
	136	CALL EXISTS NEW_TABLE SIGNAL
	137	CALLED EXIT NO SIMPLE
	138	CAPTURE EXTERNAL NOCACHE SOME
	139	CARDINALITY FENCED NOCYCLE SOURCE
	140	CASCADED FETCH NODENAME SPECIFIC
	141	CASE FIELDPROC NODENUMBER SQL
	142	CAST FILE NOMAXVALUE SQLID
	143	CCSID FINAL NOMINVALUE STANDARD
	144	CHAR FOR NOORDER START
	145	CHARACTER FOREIGN NOT STATIC
	146	CHECK FREE NULL STAY
	147	CLOSE FROM NULLS STOGROUP
	148	CLUSTER FULL NUMPARTS STORES
	149	COLLECTION FUNCTION OBID STYLE
	150	COLLID GENERAL OF SUBPAGES
	151	COLUMN GENERATED OLD SUBSTRING
	152	COMMENT GET OLD_TABLE SYNONYM
	153	COMMIT GLOBAL ON SYSFUN
	154	CONCAT GO OPEN SYSIBM
	155	CONDITION GOTO OPTIMIZATION SYSPROC
	156	CONNECT GRANT OPTIMIZE SYSTEM
	157	CONNECTION GRAPHIC OPTION TABLE
	158	CONSTRAINT GROUP OR TABLESPACE
	159	CONTAINS HANDLER ORDER THEN
	160	CONTINUE HAVING OUT TO
	161	COUNT HOLD OUTER TRANSACTION
	162	COUNT_BIG HOUR OVERRIDING TRIGGER
	163	CREATE HOURS PACKAGE TRIM
	164	CROSS IDENTITY PARAMETER TYPE
	165	CURRENT IF PART UNDO
	166	CURRENT_DATE IMMEDIATE PARTITION UNION
	167	CURRENT_LC_CTYPE IN PATH UNIQUE
	168	CURRENT_PATH INCLUDING PIECESIZE UNTIL
	169	CURRENT_SERVER INCREMENT PLAN UPDATE
	170	CURRENT_TIME INDEX POSITION USAGE
	171	CURRENT_TIMESTAMP INDICATOR PRECISION USER
	172	CURRENT_TIMEZONE INHERIT PREPARE USING
	173	CURRENT_USER INNER PRIMARY VALIDPROC
174	CURSOR INOUT PRIQTY VALUES
175	CYCLE INSENSITIVE PRIVILEGES VARIABLE
176	DATA INSERT PROCEDURE VARIANT
177	DATABASE INTEGRITY PROGRAM VCAT
178	DAY INTO PSID VIEW
179	DAYS IS QUERYNO VOLUMES
180	DB2GENERAL ISOBID READ WHEN
181	DB2GENRL ISOLATION READS WHERE
182	DB2SQL ITERATE RECOVERY WHILE
183	DBINFO JAR REFERENCES WITH
184	DECLARE JAVA REFERENCING WLM
185	DEFAULT JOIN RELEASE WRITE
186	DEFAULTS KEY RENAME YEAR
187	DEFINITION LABEL REPEAT YEARS
188	DELETE LANGUAGE RESET
189	DESCRIPTOR LC_CTYPE RESIGNAL
190	/;
191
192	#------------------------------------------------------------------------------
193
194	sub produce
195	{
196	my ($translator) = @_;
197	$DEBUG = $translator->debug;
198	$WARN = $translator->show_warnings;
199	my $no_comments = $translator->no_comments;
200	my $add_drop_table = $translator->add_drop_table;
201	my $schema = $translator->schema;
202	my $output = '';
203	my $indent = ' ';
204
205	$output .= header_comment unless($no_comments);
b08b5416	206	my (@table_defs, @fks, @index_defs);
04bc93b6	207	foreach my $table ($schema->get_tables)
04bc93b6	208	{
5e2c196a	209	push @table_defs, 'DROP TABLE ' . $table->name . ";" if $add_drop_table;
b08b5416	210	my ($table_def, $fks) = create_table($table, {
a0ea6c87	211	no_comments => $no_comments});
b08b5416	212	push @table_defs, $table_def;
b08b5416	213	push @fks, @$fks;
04bc93b6	214
a0ea6c87	215	foreach my $index ($table->get_indices)
04bc93b6	216	{
a0ea6c87	217	push @index_defs, create_index($index);
04bc93b6	218	}
a0ea6c87	219
04bc93b6	220	}
a0ea6c87	221	my (@view_defs);
	222	foreach my $view ( $schema->get_views )
	223	{
	224	push @view_defs, create_view($view);
	225	}
	226	my (@trigger_defs);
	227	foreach my $trigger ( $schema->get_triggers )
	228	{
	229	push @trigger_defs, create_trigger($trigger);
	230	}
04bc93b6	231
b08b5416	232	return wantarray ? (@table_defs, @fks, @index_defs, @view_defs, @trigger_defs) :
b08b5416	233	$output . join("\n\n", @table_defs, @fks, @index_defs, @view_defs, @trigger_defs) . "\n";
04bc93b6	234	}
	235
	236	{ my %objnames;
	237
	238	sub check_name
	239	{
	240	my ($name, $type, $length) = @_;
	241
	242	my $newname = $name;
	243	if(length($name) > $length) ## Maximum table name length is 18
	244	{
	245	warn "Table name $name is longer than $length characters, truncated" if $WARN;
a0ea6c87	246	# if(grep {$_ eq substr($name, 0, $length) }
	247	# values(%{$objnames{$type}}))
	248	# {
	249	# die "Got multiple matching table names when truncated";
	250	# }
	251	# $objnames{$type}{$name} = substr($name, 0,$length);
	252	# $newname = $objnames{$type}{$name};
04bc93b6	253	}
	254
	255	if($db2_reserved{uc($newname)})
	256	{
	257	warn "$newname is a reserved word in DB2!" if $WARN;
	258	}
	259
5e2c196a	260	# return sprintf("%-*s", $length-5, $newname);
5e2c196a	261	return $newname;
04bc93b6	262	}
	263	}
	264
a0ea6c87	265	sub create_table
	266	{
	267	my ($table, $options) = @_;
	268
	269	my $table_name = check_name($table->name, 'tables', 128);
	270	# this limit is 18 in older DB2s ! (<= 8)
	271
	272	my (@field_defs, @comments);
	273	push @comments, "--\n-- Table: $table_name\n--" unless $options->{no_comments};
	274	foreach my $field ($table->get_fields)
	275	{
	276	push @field_defs, create_field($field);
	277	}
b08b5416	278	my (@con_defs, @fks);
a0ea6c87	279	foreach my $con ($table->get_constraints)
a0ea6c87	280	{
b08b5416	281	my ($cdefs, $fks) = create_constraint($con);
	282	push @con_defs, @$cdefs;
	283	push @fks, @$fks;
a0ea6c87	284	}
a0ea6c87	285
	286	my $tablespace = $table->extra()->{'TABLESPACE'} \|\| '';
	287	my $table_def = "CREATE TABLE $table_name (\n";
b08b5416	288	$table_def .= join (",\n", map { " $_" } @field_defs, @con_defs);
a0ea6c87	289	$table_def .= "\n)";
	290	$table_def .= $tablespace ? "IN $tablespace;" : ';';
	291
b08b5416	292	return $table_def, \@fks;
a0ea6c87	293	}
	294
	295	sub create_field
	296	{
	297	my ($field) = @_;
	298
	299	my $field_name = check_name($field->name, 'fields', 30);
	300	# use Data::Dumper;
	301	# print Dumper(\%dt_translate);
	302	# print $field->data_type, " ", $dt_translate{lc($field->data_type)}, "\n";
	303	my $data_type = uc($dt_translate{lc($field->data_type)} \|\| $field->data_type);
	304	my $size = $field->size();
	305
	306	my $field_def = "$field_name $data_type";
	307	$field_def .= $field->is_auto_increment ?
3866f0ff	308	' GENERATED BY DEFAULT AS IDENTITY (START WITH 1, INCREMENT BY 1)' : '';
b08b5416	309	$field_def .= $data_type =~ /(CHAR\|CLOB)/i ? "(${size})" : '';
a0ea6c87	310	$field_def .= !$field->is_nullable ? ' NOT NULL':'';
	311	# $field_def .= $field->is_primary_key ? ' PRIMARY KEY':'';
	312	$field_def .= !defined $field->default_value ? '' :
	313	$field->default_value =~ /current( \|_)timestamp/i \|\|
	314	$field->default_value =~ /\Qnow()\E/i ?
b08b5416	315	' DEFAULT CURRENT TIMESTAMP' : defined $field->default_value ?
	316	(" DEFAULT " . ($data_type =~ /(INT\|DOUBLE)/i ?
	317	$field->default_value : "'" . $field->default_value . "'")
	318	) : '';
a0ea6c87	319
5e2c196a	320	return $field_def;
a0ea6c87	321	}
	322
	323	sub create_index
	324	{
	325	my ($index) = @_;
	326
	327	my $out = sprintf('CREATE %sINDEX %s ON %s ( %s );',
	328	$index->type() =~ /^UNIQUE$/i ? 'UNIQUE' : '',
	329	$index->name,
	330	$index->table->name,
	331	join(', ', $index->fields) );
	332
	333	return $out;
	334	}
	335
	336	sub create_constraint
	337	{
	338	my ($constraint) = @_;
	339
b08b5416	340	my (@con_defs, @fks);
a0ea6c87	341
	342	my $ctype = $constraint->type =~ /^PRIMARY(_\|\s)KEY$/i ? 'PRIMARY KEY' :
	343	$constraint->type =~ /^UNIQUE$/i ? 'UNIQUE' :
	344	$constraint->type =~ /^CHECK_C$/i ? 'CHECK' :
b08b5416	345	$constraint->type =~ /^FOREIGN(_\|\s)KEY$/i ? 'FOREIGN KEY' : '';
a0ea6c87	346
	347	my $expr = $constraint->type =~ /^CHECK_C$/i ? $constraint->expression :
	348	'';
b08b5416	349	my $ref = $constraint->type =~ /^FOREIGN(_\|\s)KEY$/i ? ('REFERENCES ' . $constraint->reference_table . '(' . join(', ', $constraint->reference_fields) . ')') : '';
a0ea6c87	350	my $update = $constraint->on_update ? $constraint->on_update : '';
	351	my $delete = $constraint->on_delete ? $constraint->on_delete : '';
	352
b08b5416	353	my $out = join(' ', grep { $_ }
a0ea6c87	354	$constraint->name ? ('CONSTRAINT ' . $constraint->name) : '',
	355	$ctype,
	356	'(' . join (', ', $constraint->fields) . ')',
	357	$expr ? $expr : $ref,
	358	$update,
	359	$delete);
b08b5416	360	if ($constraint->type eq FOREIGN_KEY) {
	361	my $table_name = $constraint->table->name;
	362	$out = "ALTER TABLE $table_name ADD $out;";
	363	push @fks, $out;
	364	}
	365	else {
	366	push @con_defs, $out;
	367	}
a0ea6c87	368
b08b5416	369	return \@con_defs, \@fks;
a0ea6c87	370
	371	}
	372
	373	sub create_view
	374	{
	375	my ($view) = @_;
	376
	377	my $out = sprintf("CREATE VIEW %s AS\n%s;",
	378	$view->name,
	379	$view->sql);
	380
	381	return $out;
	382	}
	383
	384	sub create_trigger
	385	{
	386	my ($trigger) = @_;
	387	# create: CREATE TRIGGER trigger_name before type /ON/i table_name reference_b(?) /FOR EACH ROW/i 'MODE DB2SQL' triggered_action
	388
	389	my $out = sprintf('CREATE TRIGGER %s %s %s ON %s %s %s MODE DB2SQL %s',
	390	$trigger->name,
	391	$trigger->perform_action_when \|\| 'AFTER',
	392	$trigger->database_event =~ /update_on/i ?
	393	('UPDATE OF '. join(', ', $trigger->fields)) :
	394	$trigger->database_event \|\| 'UPDATE',
5e2c196a	395	$trigger->table->name,
a0ea6c87	396	$trigger->extra->{reference} \|\| 'REFERENCING OLD AS oldrow NEW AS newrow',
	397	$trigger->extra->{granularity} \|\| 'FOR EACH ROW',
	398	$trigger->action );
	399
	400	return $out;
	401
	402	}
	403
	404	sub alter_field
	405	{
	406	my ($from_field, $to_field) = @_;
5e2c196a	407
	408	my $data_type = uc($dt_translate{lc($to_field->data_type)} \|\| $to_field->data_type);
	409
	410	my $size = $to_field->size();
	411	$data_type .= $data_type =~ /CHAR/i ? "(${size})" : '';
	412
	413	# DB2 will only allow changing of varchar/vargraphic datatypes
	414	# to extend their lengths. Or changing of text types to other
	415	# texttypes, and numeric types to larger numeric types. (v8)
	416	# We can also drop/add keys, checks and constraints, but not
	417	# columns !?
	418
	419	my $out = sprintf('ALTER TABLE %s ALTER %s SET DATATYPE %s',
	420	$to_field->table->name,
	421	$to_field->name,
	422	$data_type);
	423
a0ea6c87	424	}
	425
	426	sub add_field
	427	{
5e2c196a	428	my ($new_field) = @_;
	429
	430	my $out = sprintf('ALTER TABLE %s ADD COLUMN %s',
	431	$new_field->table->name,
	432	create_field($new_field));
	433
	434	return $out;
a0ea6c87	435	}
	436
	437	sub drop_field
	438	{
	439	my ($field) = @_;
5e2c196a	440
5e2c196a	441	return '';
a0ea6c87	442	}
04bc93b6	443	1;