SQL::Translator::Producer::SQLServer - MS SQLServer producer for SQL::Translator
Index
Code Index:
NAME
SQL::Translator::Producer::SQLServer - MS SQLServer producer for SQL::Translator
SYNOPSIS
use SQL::Translator;
my $t = SQL::Translator->new( parser => '...', producer => 'SQLServer' );
$t->translate;
DESCRIPTION
WARNINGB This is still fairly early code, basically a hacked version of the
Sybase Producer (thanks Sam, Paul and Ken for doing the real work ;-)
TODO
* !! Write some tests !!
* Reserved words list needs updating to SQLServer.
* Triggers, Procedures and Views DO NOT WORK
SQLServer Create Table Syntax
TODO
# Text of view is already a 'create view' statement so no need to
# be fancy
foreach ( $schema->get_views ) {
my $name = $_->name();
$output .= "\n\n";
$output .= "--\n-- View: $name\n--\n\n" unless $no_comments;
my $text = $_->sql();
$text =~ s/\r//g;
$output .= "$text\nGO\n";
}
# Text of procedure already has the 'create procedure' stuff
# so there is no need to do anything fancy. However, we should
# think about doing fancy stuff with granting permissions and
# so on.
foreach ( $schema->get_procedures ) {
my $name = $_->name();
$output .= "\n\n";
$output .= "--\n-- Procedure: $name\n--\n\n" unless $no_comments;
my $text = $_->sql();
$text =~ s/\r//g;
$output .= "$text\nGO\n";
}
=cut
SEE ALSO
AUTHORS
Mark Addison <grommit@users.sourceforge.net> - Bulk of code from
Sybase producer, I just tweaked it for SQLServer. Thanks.
package SQL::Translator::Producer::SQLServer;
# -------------------------------------------------------------------
# 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
# -------------------------------------------------------------------
use strict;
use vars qw[ $DEBUG $WARN $VERSION ];
$VERSION = '1.59';
$DEBUG = 1 unless defined $DEBUG;
use Data::Dumper;
use SQL::Translator::Schema::Constants;
use SQL::Translator::Utils qw(debug header_comment);
use SQL::Translator::ProducerUtils;
my $util = SQL::Translator::ProducerUtils->new( quote_chars => ['[', ']'] );
my %translate = (
date => 'datetime',
'time' => 'datetime',
# Sybase types
#integer => 'numeric',
#int => 'numeric',
#number => 'numeric',
#money => 'money',
#varchar => 'varchar',
#varchar2 => 'varchar',
#timestamp => 'datetime',
#text => 'varchar',
#real => 'double precision',
#comment => 'text',
#bit => 'bit',
#tinyint => 'smallint',
#float => 'double precision',
#serial => 'numeric',
#boolean => 'varchar',
#char => 'char',
#long => 'varchar',
);
# If these datatypes have size appended the sql fails.
my @no_size = qw/tinyint smallint int integer bigint text bit image datetime/;
my $max_id_length = 128;
my %global_names;
# -------------------------------------------------------------------
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;
%global_names = (); #reset
my $output;
$output .= header_comment."\n" unless ($no_comments);
# Generate the DROP statements.
if ($add_drop_table) {
my @tables = sort { $b->order <=> $a->order } $schema->get_tables;
$output .= "--\n-- Turn off constraints\n--\n\n" unless $no_comments;
foreach my $table (@tables) {
my $name = $table->name;
my $q_name = unreserve($name);
$output .= "IF EXISTS (SELECT name FROM sysobjects WHERE name = '$name' AND type = 'U') ALTER TABLE $q_name NOCHECK CONSTRAINT all;\n"
}
$output .= "\n";
$output .= "--\n-- Drop tables\n--\n\n" unless $no_comments;
foreach my $table (@tables) {
my $name = $table->name;
my $q_name = unreserve($name);
$output .= "IF EXISTS (SELECT name FROM sysobjects WHERE name = '$name' AND type = 'U') DROP TABLE $q_name;\n"
}
}
# Generate the CREATE sql
my @foreign_constraints = (); # these need to be added separately, as tables may not exist yet
for my $table ( $schema->get_tables ) {
my $table_name = $table->name or next;
my $table_name_ur = unreserve($table_name) || '';
my ( @comments, @field_defs, @index_defs, @constraint_defs );
push @comments, "\n\n--\n-- Table: $table_name_ur\n--"
unless $no_comments;
push @comments, map { "-- $_" } $table->comments;
#
# Fields
#
my %field_name_scope;
for my $field ( $table->get_fields ) {
my $field_name = $field->name;
my $field_name_ur = unreserve( $field_name );
my $field_def = qq["$field_name_ur"];
$field_def =~ s/\"//g;
if ( $field_def =~ /identity/ ){
$field_def =~ s/identity/pidentity/;
}
#
# Datatype
#
my $data_type = lc $field->data_type;
my $orig_data_type = $data_type;
my %extra = $field->extra;
my $list = $extra{'list'} || [];
# \todo deal with embedded quotes
my $commalist = join( ', ', map { qq['$_'] } @$list );
if ( $data_type eq 'enum' ) {
my $check_name = mk_name( $field_name . '_chk' );
push @constraint_defs,
"CONSTRAINT $check_name CHECK ($field_name IN ($commalist))";
$data_type .= 'character varying';
}
elsif ( $data_type eq 'set' ) {
$data_type .= 'character varying';
}
elsif ( grep { $data_type eq $_ } qw/bytea blob clob/ ) {
$data_type = 'varbinary';
}
else {
if ( defined $translate{ $data_type } ) {
$data_type = $translate{ $data_type };
}
else {
warn "Unknown datatype: $data_type ",
"($table_name.$field_name)\n" if $WARN;
}
}
my $size = $field->size;
if ( grep $_ eq $data_type, @no_size) {
# SQLServer doesn't seem to like sizes on some datatypes
$size = undef;
}
elsif ( !$size ) {
if ( $data_type =~ /numeric/ ) {
$size = '9,0';
}
elsif ( $orig_data_type eq 'text' ) {
#interpret text fields as long varchars
$size = '255';
}
elsif (
$data_type eq 'varchar' &&
$orig_data_type eq 'boolean'
) {
$size = '6';
}
elsif ( $data_type eq 'varchar' ) {
$size = '255';
}
}
$field_def .= " $data_type";
$field_def .= "($size)" if $size;
$field_def .= ' IDENTITY' if $field->is_auto_increment;
#
# Not null constraint
#
unless ( $field->is_nullable ) {
$field_def .= ' NOT NULL';
}
else {
$field_def .= ' NULL' if $data_type ne 'bit';
}
#
# Default value
#
SQL::Translator::Producer->_apply_default_value(
$field,
\$field_def,
[
'NULL' => \'NULL',
],
);
push @field_defs, $field_def;
}
#
# Constraint Declarations
#
my @constraint_decs = ();
for my $constraint ( $table->get_constraints ) {
my $name = $constraint->name || '';
my $name_ur = unreserve($name);
# Make sure we get a unique name
my $type = $constraint->type || NORMAL;
my @fields = map { unreserve( $_ ) }
$constraint->fields;
my @rfields = map { unreserve( $_ ) }
$constraint->reference_fields;
next unless @fields;
my $c_def;
if ( $type eq FOREIGN_KEY ) {
$name ||= mk_name( $table_name . '_fk' );
my $on_delete = uc ($constraint->on_delete || '');
my $on_update = uc ($constraint->on_update || '');
# The default implicit constraint action in MSSQL is RESTRICT
# but you can not specify it explicitly. Go figure :)
for ($on_delete, $on_update) {
undef $_ if $_ eq 'RESTRICT'
}
$c_def =
"ALTER TABLE $table_name_ur ADD CONSTRAINT $name_ur FOREIGN KEY".
' (' . join( ', ', @fields ) . ') REFERENCES '.
unreserve($constraint->reference_table).
' (' . join( ', ', @rfields ) . ')'
;
if ( $on_delete && $on_delete ne "NO ACTION") {
$c_def .= " ON DELETE $on_delete";
}
if ( $on_update && $on_update ne "NO ACTION") {
$c_def .= " ON UPDATE $on_update";
}
$c_def .= ";";
push @foreign_constraints, $c_def;
next;
}
if ( $type eq PRIMARY_KEY ) {
$name = ($name ? unreserve($name) : mk_name( $table_name . '_pk' ));
$c_def =
"CONSTRAINT $name PRIMARY KEY ".
'(' . join( ', ', @fields ) . ')';
}
elsif ( $type eq UNIQUE ) {
$name = $name_ur || mk_name( $table_name . '_uc' );
my @nullable = grep { $_->is_nullable } $constraint->fields;
if (!@nullable) {
$c_def =
"CONSTRAINT $name UNIQUE " .
'(' . join( ', ', @fields ) . ')';
} else {
push @index_defs,
"CREATE UNIQUE NONCLUSTERED INDEX $name_ur ON $table_name_ur (" .
join( ', ', @fields ) . ')' .
' WHERE ' . join( ' AND ', map unreserve($_->name) . ' IS NOT NULL', @nullable ) . ';';
next;
}
}
push @constraint_defs, $c_def;
}
#
# Indices
#
for my $index ( $table->get_indices ) {
my $idx_name = $index->name || mk_name($table_name . '_idx');
my $idx_name_ur = unreserve($idx_name);
push @index_defs,
"CREATE INDEX $idx_name_ur ON $table_name_ur (".
join( ', ', map unreserve($_), $index->fields ) . ");";
}
my $create_statement = "";
$create_statement .= qq[CREATE TABLE $table_name_ur (\n].
join( ",\n",
map { " $_" } @field_defs, @constraint_defs
).
"\n);"
;
$output .= join( "\n\n",
@comments,
$create_statement,
@index_defs,
);
}
# Add FK constraints
$output .= join ("\n", '', @foreign_constraints) if @foreign_constraints;
# create view/procedure are NOT prepended to the input $sql, needs
# to be filled in with the proper syntax
return $output;
}
# -------------------------------------------------------------------
sub mk_name {
my ($name, $scope, $critical) = @_;
$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 }++;
}
$name = substr( $name, 0, $max_id_length )
if ((length( $name ) > $max_id_length) && $critical);
$scope->{ $name }++;
return unreserve($name);
}
# -------------------------------------------------------------------
sub unreserve { $util->quote($_[0]) }
1;
# -------------------------------------------------------------------