SQL::Translator::Parser::Sybase - parser for Sybase
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NAME
SQL::Translator::Parser::Sybase - parser for Sybase
SYNOPSIS
use SQL::Translator::Parser::Sybase;
DESCRIPTION
Mostly parses the output of "dbschema.pl," a Perl script freely
available from http://www.midsomer.org. The parsing is not complete,
however, and you would probably have much better luck using the
DBI-Sybase parser included with SQL::Translator.
AUTHOR
Ken Y. Clark <kclark@cpan.org>.
SEE ALSO
SQL::Translator, SQL::Translator::Parser::DBI, http://www.midsomer.org/.
package SQL::Translator::Parser::Sybase;
# -------------------------------------------------------------------
# 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 $VERSION $GRAMMAR @EXPORT_OK ];
$VERSION = '1.59';
$DEBUG = 0 unless defined $DEBUG;
use Data::Dumper;
use Parse::RecDescent;
use Exporter;
use base qw(Exporter);
@EXPORT_OK = qw(parse);
$::RD_ERRORS = 1;
$::RD_WARN = 1;
$::RD_HINT = 1;
$GRAMMAR = q{
{
my ( %tables, @table_comments, $table_order );
}
startrule : statement(s) eofile { \%tables }
eofile : /^\Z/
statement : create_table
| create_procedure
| create_index
| create_constraint
| comment
| use
| setuser
| if
| print
| grant
| exec
| <error>
use : /use/i WORD GO
{ @table_comments = () }
setuser : /setuser/i NAME GO
if : /if/i object_not_null begin if_command end GO
if_command : grant
| create_index
| create_constraint
object_not_null : /object_id/i '(' ident ')' /is not null/i
print : /\s*/ /print/i /.*/
else : /else/i /.*/
begin : /begin/i
end : /end/i
grant : /grant/i /[^\n]*/
exec : exec_statement(s) GO
exec_statement : /exec/i /[^\n]+/
comment : comment_start comment_middle comment_end
{
my $comment = $item[2];
$comment =~ s/^\s*|\s*$//mg;
$comment =~ s/^\**\s*//mg;
push @table_comments, $comment;
}
comment_start : /^\s*\/\*/
comment_end : /\s*\*\//
comment_middle : m{([^*]+|\*(?!/))*}
#
# Create table.
#
create_table : /create/i /table/i ident '(' create_def(s /,/) ')' lock(?) on_system(?) GO
{
my $table_owner = $item[3]{'owner'};
my $table_name = $item[3]{'name'};
if ( @table_comments ) {
$tables{ $table_name }{'comments'} = [ @table_comments ];
@table_comments = ();
}
$tables{ $table_name }{'order'} = ++$table_order;
$tables{ $table_name }{'name'} = $table_name;
$tables{ $table_name }{'owner'} = $table_owner;
$tables{ $table_name }{'system'} = $item[7];
my $i = 0;
for my $def ( @{ $item[5] } ) {
if ( $def->{'supertype'} eq 'field' ) {
my $field_name = $def->{'name'};
$tables{ $table_name }{'fields'}{ $field_name } =
{ %$def, order => $i };
$i++;
if ( $def->{'is_primary_key'} ) {
push @{ $tables{ $table_name }{'constraints'} }, {
type => 'primary_key',
fields => [ $field_name ],
};
}
}
elsif ( $def->{'supertype'} eq 'constraint' ) {
push @{ $tables{ $table_name }{'constraints'} }, $def;
}
else {
push @{ $tables{ $table_name }{'indices'} }, $def;
}
}
}
create_constraint : /create/i constraint
{
@table_comments = ();
push @{ $tables{ $item[2]{'table'} }{'constraints'} }, $item[2];
}
create_index : /create/i index
{
@table_comments = ();
push @{ $tables{ $item[2]{'table'} }{'indices'} }, $item[2];
}
create_procedure : /create/i /procedure/i procedure_body GO
{
@table_comments = ();
}
procedure_body : not_go(s)
not_go : /((?!go).)*/
create_def : field
| index
| constraint
blank : /\s*/
field : field_name data_type nullable(?)
{
$return = {
supertype => 'field',
name => $item{'field_name'},
data_type => $item{'data_type'}{'type'},
size => $item{'data_type'}{'size'},
nullable => $item[3][0],
# default => $item{'default_val'}[0],
# is_auto_inc => $item{'auto_inc'}[0],
# is_primary_key => $item{'primary_key'}[0],
}
}
constraint : primary_key_constraint
| unique_constraint
field_name : WORD
index_name : WORD
table_name : WORD
data_type : WORD field_size(?)
{
$return = {
type => $item[1],
size => $item[2][0]
}
}
lock : /lock/i /datarows/i
field_type : WORD
field_size : '(' num_range ')' { $item{'num_range'} }
num_range : DIGITS ',' DIGITS
{ $return = $item[1].','.$item[3] }
| DIGITS
{ $return = $item[1] }
nullable : /not/i /null/i
{ $return = 0 }
| /null/i
{ $return = 1 }
default_val : /default/i /(?:')?[\w\d.-]*(?:')?/
{ $item[2]=~s/'//g; $return=$item[2] }
auto_inc : /auto_increment/i { 1 }
primary_key_constraint : /primary/i /key/i index_name(?) parens_field_list
{
$return = {
supertype => 'constraint',
name => $item{'index_name'}[0],
type => 'primary_key',
fields => $item[4],
}
}
unique_constraint : /unique/i clustered(?) INDEX(?) index_name(?) on_table(?) parens_field_list
{
$return = {
supertype => 'constraint',
type => 'unique',
clustered => $item[2][0],
name => $item[4][0],
table => $item[5][0],
fields => $item[6],
}
}
clustered : /clustered/i
{ $return = 1 }
| /nonclustered/i
{ $return = 0 }
INDEX : /index/i
on_table : /on/i table_name
{ $return = $item[2] }
on_system : /on/i /system/i
{ $return = 1 }
index : clustered(?) INDEX index_name(?) on_table(?) parens_field_list
{
$return = {
supertype => 'index',
type => 'normal',
clustered => $item[1][0],
name => $item[3][0],
table => $item[4][0],
fields => $item[5],
}
}
parens_field_list : '(' field_name(s /,/) ')'
{ $item[2] }
ident : QUOTE(?) WORD '.' WORD QUOTE(?)
{ $return = { owner => $item[2], name => $item[4] } }
| WORD
{ $return = { name => $item[2] } }
GO : /^go/i
NAME : QUOTE(?) /\w+/ QUOTE(?)
{ $item[2] }
WORD : /[\w#]+/
DIGITS : /\d+/
COMMA : ','
QUOTE : /'/
};
# -------------------------------------------------------------------
sub parse {
my ( $translator, $data ) = @_;
my $parser = Parse::RecDescent->new($GRAMMAR);
local $::RD_TRACE = $translator->trace ? 1 : undef;
local $DEBUG = $translator->debug;
unless (defined $parser) {
return $translator->error("Error instantiating Parse::RecDescent ".
"instance: Bad grammer");
}
my $result = $parser->startrule($data);
return $translator->error( "Parse failed." ) unless defined $result;
warn Dumper( $result ) if $DEBUG;
my $schema = $translator->schema;
my @tables = sort {
$result->{ $a }->{'order'} <=> $result->{ $b }->{'order'}
} keys %{ $result };
for my $table_name ( @tables ) {
my $tdata = $result->{ $table_name };
my $table = $schema->add_table( name => $tdata->{'name'} )
or die "Can't create table '$table_name': ", $schema->error;
$table->comments( $tdata->{'comments'} );
my @fields = sort {
$tdata->{'fields'}->{$a}->{'order'}
<=>
$tdata->{'fields'}->{$b}->{'order'}
} keys %{ $tdata->{'fields'} };
for my $fname ( @fields ) {
my $fdata = $tdata->{'fields'}{ $fname };
my $field = $table->add_field(
name => $fdata->{'name'},
data_type => $fdata->{'data_type'},
size => $fdata->{'size'},
default_value => $fdata->{'default'},
is_auto_increment => $fdata->{'is_auto_inc'},
is_nullable => $fdata->{'nullable'},
comments => $fdata->{'comments'},
) or die $table->error;
$table->primary_key( $field->name ) if $fdata->{'is_primary_key'};
for my $qual ( qw[ binary unsigned zerofill list ] ) {
if ( my $val = $fdata->{ $qual } || $fdata->{ uc $qual } ) {
next if ref $val eq 'ARRAY' && !@$val;
$field->extra( $qual, $val );
}
}
if ( $field->data_type =~ /(set|enum)/i && !$field->size ) {
my %extra = $field->extra;
my $longest = 0;
for my $len ( map { length } @{ $extra{'list'} || [] } ) {
$longest = $len if $len > $longest;
}
$field->size( $longest ) if $longest;
}
for my $cdata ( @{ $fdata->{'constraints'} } ) {
next unless $cdata->{'type'} eq 'foreign_key';
$cdata->{'fields'} ||= [ $field->name ];
push @{ $tdata->{'constraints'} }, $cdata;
}
}
for my $idata ( @{ $tdata->{'indices'} || [] } ) {
my $index = $table->add_index(
name => $idata->{'name'},
type => uc $idata->{'type'},
fields => $idata->{'fields'},
) or die $table->error;
}
for my $cdata ( @{ $tdata->{'constraints'} || [] } ) {
my $constraint = $table->add_constraint(
name => $cdata->{'name'},
type => $cdata->{'type'},
fields => $cdata->{'fields'},
reference_table => $cdata->{'reference_table'},
reference_fields => $cdata->{'reference_fields'},
match_type => $cdata->{'match_type'} || '',
on_delete => $cdata->{'on_delete'} || $cdata->{'on_delete_do'},
on_update => $cdata->{'on_update'} || $cdata->{'on_update_do'},
) or die $table->error;
}
}
return 1;
}
1;
# -------------------------------------------------------------------
# Every hero becomes a bore at last.
# Ralph Waldo Emerson
# -------------------------------------------------------------------