1 package SQL::Translator;
3 # ----------------------------------------------------------------------
4 # $Id: Translator.pm,v 1.25 2003-05-06 12:44:54 dlc Exp $
5 # ----------------------------------------------------------------------
6 # Copyright (C) 2003 Ken Y. Clark <kclark@cpan.org>,
7 # darren chamberlain <darren@cpan.org>,
8 # Chris Mungall <cjm@fruitfly.org>
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.
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.
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
23 # -------------------------------------------------------------------
26 use vars qw( $VERSION $REVISION $DEFAULT_SUB $DEBUG $ERROR );
27 use base 'Class::Base';
30 $REVISION = sprintf "%d.%02d", q$Revision: 1.25 $ =~ /(\d+)\.(\d+)/;
31 $DEBUG = 0 unless defined $DEBUG;
36 use File::Spec::Functions qw(catfile);
37 use File::Basename qw(dirname);
40 # ----------------------------------------------------------------------
41 # The default behavior is to "pass through" values (note that the
42 # SQL::Translator instance is the first value ($_[0]), and the stuff
43 # to be parsed is the second value ($_[1])
44 # ----------------------------------------------------------------------
45 $DEFAULT_SUB = sub { $_[1] } unless defined $DEFAULT_SUB;
47 # ----------------------------------------------------------------------
51 # new takes an optional hash of arguments. These arguments may
52 # include a parser, specified with the keys "parser" or "from",
53 # and a producer, specified with the keys "producer" or "to".
55 # The values that can be passed as the parser or producer are
56 # given directly to the parser or producer methods, respectively.
57 # See the appropriate method description below for details about
58 # what each expects/accepts.
59 # ----------------------------------------------------------------------
61 my ( $self, $config ) = @_;
64 # Set the parser and producer.
66 # If a 'parser' or 'from' parameter is passed in, use that as the
67 # parser; if a 'producer' or 'to' parameter is passed in, use that
68 # as the producer; both default to $DEFAULT_SUB.
70 $self->parser ($config->{'parser'} || $config->{'from'} || $DEFAULT_SUB);
71 $self->producer($config->{'producer'} || $config->{'to'} || $DEFAULT_SUB);
74 # Set up callbacks for formatting of pk,fk,table,package names in producer
76 $self->format_table_name($config->{'format_table_name'});
77 $self->format_package_name($config->{'format_package_name'});
78 $self->format_fk_name($config->{'format_fk_name'});
79 $self->format_pk_name($config->{'format_pk_name'});
82 # Set the parser_args and producer_args
84 for my $pargs ( qw[ parser_args producer_args ] ) {
85 $self->$pargs( $config->{$pargs} ) if defined $config->{ $pargs };
89 # Set the data source, if 'filename' or 'file' is provided.
91 $config->{'filename'} ||= $config->{'file'} || "";
92 $self->filename( $config->{'filename'} ) if $config->{'filename'};
95 # Finally, if there is a 'data' parameter, use that in
96 # preference to filename and file
98 if ( my $data = $config->{'data'} ) {
103 # Set various other options.
105 $self->{'debug'} = defined $config->{'debug'} ? $config->{'debug'} : $DEBUG;
107 $self->add_drop_table( $config->{'add_drop_table'} );
109 $self->custom_translate( $config->{'xlate'} );
111 $self->no_comments( $config->{'no_comments'} );
113 $self->show_warnings( $config->{'show_warnings'} );
115 $self->trace( $config->{'trace'} );
120 # ----------------------------------------------------------------------
121 # add_drop_table([$bool])
122 # ----------------------------------------------------------------------
125 if ( defined (my $arg = shift) ) {
126 $self->{'add_drop_table'} = $arg ? 1 : 0;
128 return $self->{'add_drop_table'} || 0;
132 # ----------------------------------------------------------------------
133 # custom_translate([$bool])
134 # ----------------------------------------------------------------------
135 sub custom_translate {
137 $self->{'custom_translate'} = shift if @_;
138 return $self->{'custom_translate'} || {};
141 # ----------------------------------------------------------------------
142 # no_comments([$bool])
143 # ----------------------------------------------------------------------
147 if ( defined $arg ) {
148 $self->{'no_comments'} = $arg ? 1 : 0;
150 return $self->{'no_comments'} || 0;
154 # ----------------------------------------------------------------------
155 # producer([$producer_spec])
157 # Get or set the producer for the current translator.
158 # ----------------------------------------------------------------------
162 # producer as a mutator
164 my $producer = shift;
166 # Passed a module name (string containing "::")
167 if ($producer =~ /::/) {
170 # Module name was passed directly
171 # We try to load the name; if it doesn't load, there's
172 # a possibility that it has a function name attached to
174 if (load($producer)) {
175 $func_name = "produce";
178 # Module::function was passed
180 # Passed Module::Name::function; try to recover
181 my @func_parts = split /::/, $producer;
182 $func_name = pop @func_parts;
183 $producer = join "::", @func_parts;
185 # If this doesn't work, then we have a legitimate
187 load($producer) or die "Can't load $producer: $@";
190 # get code reference and assign
191 $self->{'producer'} = \&{ "$producer\::$func_name" };
192 $self->{'producer_type'} = $producer;
193 $self->debug("Got producer: $producer\::$func_name\n");
196 # passed an anonymous subroutine reference
197 elsif (isa($producer, 'CODE')) {
198 $self->{'producer'} = $producer;
199 $self->{'producer_type'} = "CODE";
200 $self->debug("Got producer: code ref\n");
203 # passed a string containing no "::"; relative package name
205 my $Pp = sprintf "SQL::Translator::Producer::$producer";
206 load($Pp) or die "Can't load $Pp: $@";
207 $self->{'producer'} = \&{ "$Pp\::produce" };
208 $self->{'producer_type'} = $Pp;
209 $self->debug("Got producer: $Pp\n");
212 # At this point, $self->{'producer'} contains a subroutine
213 # reference that is ready to run
215 # Anything left? If so, it's producer_args
216 $self->producer_args(@_) if (@_);
219 return $self->{'producer'};
222 # ----------------------------------------------------------------------
225 # producer_type is an accessor that allows producer subs to get
226 # information about their origin. This is poptentially important;
227 # since all producer subs are called as subroutine references, there is
228 # no way for a producer to find out which package the sub lives in
229 # originally, for example.
230 # ----------------------------------------------------------------------
231 sub producer_type { $_[0]->{'producer_type'} }
233 # ----------------------------------------------------------------------
234 # producer_args([\%args])
236 # Arbitrary name => value pairs of paramters can be passed to a
237 # producer using this method.
239 # If the first argument passed in is undef, then the hash of arguments
240 # is cleared; all subsequent elements are added to the hash of name,
241 # value pairs stored as producer_args.
242 # ----------------------------------------------------------------------
245 return $self->_args("producer", @_);
248 # ----------------------------------------------------------------------
249 # parser([$parser_spec])
250 # ----------------------------------------------------------------------
254 # parser as a mutator
258 # Passed a module name (string containing "::")
259 if ($parser =~ /::/) {
262 # Module name was passed directly
263 # We try to load the name; if it doesn't load, there's
264 # a possibility that it has a function name attached to
267 $func_name = "parse";
270 # Module::function was passed
272 # Passed Module::Name::function; try to recover
273 my @func_parts = split /::/, $parser;
274 $func_name = pop @func_parts;
275 $parser = join "::", @func_parts;
277 # If this doesn't work, then we have a legitimate
279 load($parser) or die "Can't load $parser: $@";
282 # get code reference and assign
283 $self->{'parser'} = \&{ "$parser\::$func_name" };
284 $self->{'parser_type'} = $parser;
285 $self->debug("Got parser: $parser\::$func_name\n");
288 # passed an anonymous subroutine reference
289 elsif ( isa( $parser, 'CODE' ) ) {
290 $self->{'parser'} = $parser;
291 $self->{'parser_type'} = "CODE";
292 $self->debug("Got parser: code ref\n");
295 # passed a string containing no "::"; relative package name
297 my $Pp = "SQL::Translator::Parser::$parser";
298 load( $Pp ) or die "Can't load $Pp: $@";
299 $self->{'parser'} = \&{ "$Pp\::parse" };
300 $self->{'parser_type'} = $Pp;
301 $self->debug("Got parser: $Pp\n");
305 # At this point, $self->{'parser'} contains a subroutine
306 # reference that is ready to run
308 $self->parser_args( @_ ) if (@_);
311 return $self->{'parser'};
314 # ----------------------------------------------------------------------
315 sub parser_type { $_[0]->{'parser_type'} }
319 return $self->_args("parser", @_);
325 if ( defined $arg ) {
326 $self->{'show_warnings'} = $arg ? 1 : 0;
328 return $self->{'show_warnings'} || 0;
332 # filename - get or set the filename
336 my $filename = shift;
338 my $msg = "Cannot use directory '$filename' as input source";
339 return $self->error($msg);
340 } elsif (ref($filename) eq 'ARRAY') {
341 $self->{'filename'} = $filename;
342 $self->debug("Got array of files: ".join(', ',@$filename)."\n");
343 } elsif (-f _ && -r _) {
344 $self->{'filename'} = $filename;
345 $self->debug("Got filename: '$self->{'filename'}'\n");
347 my $msg = "Cannot use '$filename' as input source: ".
348 "file does not exist or is not readable.";
349 return $self->error($msg);
356 # ----------------------------------------------------------------------
359 # if $self->{'data'} is not set, but $self->{'filename'} is, then
360 # $self->{'filename'} is opened and read, with the results put into
362 # ----------------------------------------------------------------------
366 # Set $self->{'data'} based on what was passed in. We will
367 # accept a number of things; do our best to get it right.
370 if (isa($data, "SCALAR")) {
371 $self->{'data'} = $data;
374 if (isa($data, 'ARRAY')) {
375 $data = join '', @$data;
377 elsif (isa($data, 'GLOB')) {
381 elsif (! ref $data && @_) {
382 $data = join '', $data, @_;
384 $self->{'data'} = \$data;
388 # If we have a filename but no data yet, populate.
389 if (not $self->{'data'} and my $filename = $self->filename) {
390 $self->debug("Opening '$filename' to get contents.\n");
395 my @files = ref($filename) eq 'ARRAY' ? @$filename : ($filename);
397 foreach my $file (@files) {
398 unless (open FH, $file) {
399 return $self->error("Can't read file '$file': $!");
405 return $self->error("Can't close file '$file': $!");
409 $self->{'data'} = \$data;
412 return $self->{'data'};
419 if ( defined $arg ) {
420 $self->{'trace'} = $arg ? 1 : 0;
422 return $self->{'trace'} || 0;
425 # ----------------------------------------------------------------------
426 # translate([source], [\%args])
428 # translate does the actual translation. The main argument is the
429 # source of the data to be translated, which can be a filename, scalar
430 # reference, or glob reference.
432 # Alternatively, translate takes optional arguements, which are passed
433 # to the appropriate places. Most notable of these arguments are
434 # parser and producer, which can be used to set the parser and
435 # producer, respectively. This is the applications last chance to set
438 # translate returns a string.
439 # ----------------------------------------------------------------------
442 my ($args, $parser, $parser_type, $producer, $producer_type);
443 my ($parser_output, $producer_output);
447 # Passed a reference to a hash?
448 if (isa($_[0], 'HASH')) {
450 $self->debug("translate: Got a hashref\n");
454 # Passed a GLOB reference, i.e., filehandle
455 elsif (isa($_[0], 'GLOB')) {
456 $self->debug("translate: Got a GLOB reference\n");
460 # Passed a reference to a string containing the data
461 elsif (isa($_[0], 'SCALAR')) {
462 # passed a ref to a string
463 $self->debug("translate: Got a SCALAR reference (string)\n");
467 # Not a reference; treat it as a filename
468 elsif (! ref $_[0]) {
469 # Not a ref, it's a filename
470 $self->debug("translate: Got a filename\n");
471 $self->filename($_[0]);
474 # Passed something else entirely.
476 # We're not impressed. Take your empty string and leave.
479 # Actually, if data, parser, and producer are set, then we
480 # can continue. Too bad, because I like my comment
482 return "" unless ($self->data &&
488 # You must pass in a hash, or you get nothing.
493 # ----------------------------------------------------------------------
494 # Can specify the data to be transformed using "filename", "file",
495 # "data", or "datasource".
496 # ----------------------------------------------------------------------
497 if (my $filename = ($args->{'filename'} || $args->{'file'})) {
498 $self->filename($filename);
501 if (my $data = ($args->{'data'} || $args->{'datasource'})) {
505 # ----------------------------------------------------------------
507 # ----------------------------------------------------------------
508 my $data = $self->data;
509 unless (ref($data) eq 'SCALAR' and length $$data) {
510 return $self->error("Empty data file!");
513 # ----------------------------------------------------------------
514 # Local reference to the parser subroutine
515 # ----------------------------------------------------------------
516 if ($parser = ($args->{'parser'} || $args->{'from'})) {
517 $self->parser($parser);
519 $parser = $self->parser;
520 $parser_type = $self->parser_type;
522 # ----------------------------------------------------------------
523 # Local reference to the producer subroutine
524 # ----------------------------------------------------------------
525 if ($producer = ($args->{'producer'} || $args->{'to'})) {
526 $self->producer($producer);
528 $producer = $self->producer;
529 $producer_type = $self->producer_type;
531 # ----------------------------------------------------------------
532 # Execute the parser, then execute the producer with that output.
533 # Allowances are made for each piece to die, or fail to compile,
534 # since the referenced subroutines could be almost anything. In
535 # the future, each of these might happen in a Safe environment,
536 # depending on how paranoid we want to be.
537 # ----------------------------------------------------------------
538 eval { $parser_output = $parser->($self, $$data) };
539 if ($@ || ! $parser_output) {
540 my $msg = sprintf "translate: Error with parser '%s': %s",
541 $parser_type, ($@) ? $@ : " no results";
542 return $self->error($msg);
545 eval { $producer_output = $producer->($self, $parser_output) };
546 if ($@ || ! $producer_output) {
547 my $msg = sprintf "translate: Error with producer '%s': %s",
548 $producer_type, ($@) ? $@ : " no results";
549 return $self->error($msg);
552 return $producer_output;
555 # ----------------------------------------------------------------------
558 # Hacky sort of method to list all available parsers. This has
561 # - Only finds things in the SQL::Translator::Parser namespace
563 # - Only finds things that are located in the same directory
564 # as SQL::Translator::Parser. Yeck.
566 # This method will fail in several very likely cases:
568 # - Parser modules in different namespaces
570 # - Parser modules in the SQL::Translator::Parser namespace that
571 # have any XS componenets will be installed in
572 # arch_lib/SQL/Translator.
574 # ----------------------------------------------------------------------
576 return shift->_list("parser");
579 # ----------------------------------------------------------------------
582 # See notes for list_parsers(), above; all the problems apply to
583 # list_producers as well.
584 # ----------------------------------------------------------------------
586 return shift->_list("producer");
590 # ======================================================================
592 # ======================================================================
594 # ----------------------------------------------------------------------
595 # _args($type, \%args);
597 # Gets or sets ${type}_args. Called by parser_args and producer_args.
598 # ----------------------------------------------------------------------
602 $type = "${type}_args" unless $type =~ /_args$/;
604 unless (defined $self->{$type} && isa($self->{$type}, 'HASH')) {
605 $self->{$type} = { };
609 # If the first argument is an explicit undef (remember, we
610 # don't get here unless there is stuff in @_), then we clear
611 # out the producer_args hash.
612 if (! defined $_[0]) {
614 %{$self->{$type}} = ();
617 my $args = isa($_[0], 'HASH') ? shift : { @_ };
618 %{$self->{$type}} = (%{$self->{$type}}, %$args);
625 # ----------------------------------------------------------------------
627 # ----------------------------------------------------------------------
630 my $type = shift || return ();
631 my $uctype = ucfirst lc $type;
634 load("SQL::Translator::$uctype") or return ();
635 my $path = catfile "SQL", "Translator", $uctype;
637 my $dir = catfile $_, $path;
638 $self->debug("_list_${type}s searching $dir");
641 my $dh = IO::Dir->new($dir);
642 for (grep /\.pm$/, $dh->read) {
644 $found{ join "::", "SQL::Translator::$uctype", $_ } = 1;
651 # ----------------------------------------------------------------------
654 # Loads a Perl module. Short circuits if a module is already loaded.
655 # ----------------------------------------------------------------------
657 my $module = do { my $m = shift; $m =~ s[::][/]g; "$m.pm" };
658 return 1 if $INC{$module};
665 return __PACKAGE__->error($@) if ($@);
669 sub format_table_name {
672 $self->{'_format_table_name'} = $sub if ref $sub eq 'CODE';
673 return $self->{'_format_table_name'}->( $sub, @_ )
674 if defined $self->{'_format_table_name'};
678 sub format_package_name {
681 $self->{'_format_package_name'} = $sub if ref $sub eq 'CODE';
682 return $self->{'_format_package_name'}->( $sub, @_ )
683 if defined $self->{'_format_package_name'};
690 $self->{'_format_fk_name'} = $sub if ref $sub eq 'CODE';
691 return $self->{'_format_fk_name'}->( $sub, @_ )
692 if defined $self->{'_format_fk_name'};
699 $self->{'_format_pk_name'} = $sub if ref $sub eq 'CODE';
700 return $self->{'_format_pk_name'}->( $sub, @_ )
701 if defined $self->{'_format_pk_name'};
705 # ----------------------------------------------------------------------
708 # Calls UNIVERSAL::isa($ref, $type). I think UNIVERSAL::isa is ugly,
709 # but I like function overhead.
710 # ----------------------------------------------------------------------
712 my ($ref, $type) = @_;
713 return UNIVERSAL::isa($ref, $type);
717 #-----------------------------------------------------
718 # Rescue the drowning and tie your shoestrings.
719 # Henry David Thoreau
720 #-----------------------------------------------------
726 SQL::Translator - convert schema from one database to another
732 my $translator = SQL::Translator->new(
733 debug => 1, # Print debug info
734 trace => 0, # Print Parse::RecDescent trace
735 no_comments => 0, # Don't include comments in output
736 show_warnings => 0, # Print name mutations, conflicts
737 add_drop_table => 1, # Add "drop table" statements
739 # Make all table names CAPS in producers which support this option
740 format_table_name => sub {my $tablename = shift; return uc($tablename)},
742 # Null-op formatting, only here for documentation's sake
743 format_package_name => sub {return shift},
744 format_fk_name => sub {return shift},
745 format_pk_name => sub {return shift},
748 my $output = $translator->translate(
751 # Or an arrayref of filenames, i.e. [ $file1, $file2, $file3 ]
753 ) or die $translator->error;
759 This module attempts to simplify the task of converting one database
760 create syntax to another through the use of Parsers (which understand
761 the source format) and Producers (which understand the destination
762 format). The idea is that any Parser can be used with any Producer in
763 the conversion process. So, if you wanted Postgres-to-Oracle, you
764 would use the Postgres parser and the Oracle producer.
768 The constructor is called C<new>, and accepts a optional hash of options.
803 All options are, well, optional; these attributes can be set via
804 instance methods. Internally, they are; no (non-syntactical)
805 advantage is gained by passing options to the constructor.
809 =head2 add_drop_table
811 Toggles whether or not to add "DROP TABLE" statements just before the
814 =head2 custom_translate
816 Allows the user to override default translation of fields. For example,
817 if a MySQL "text" field would normally be converted to a "long" for Oracle,
818 the user could specify to change it to a "CLOB." Accepts a hashref where
819 keys are the "from" value and values are the "to," returns the current
824 Toggles whether to print comments in the output. Accepts a true or false
825 value, returns the current value.
829 The C<producer> method is an accessor/mutator, used to retrieve or
830 define what subroutine is called to produce the output. A subroutine
831 defined as a producer will be invoked as a function (I<not a method>)
832 and passed 2 parameters: its container C<SQL::Translator> instance and a
833 data structure. It is expected that the function transform the data
834 structure to a string. The C<SQL::Transformer> instance is provided for
835 informational purposes; for example, the type of the parser can be
836 retrieved using the C<parser_type> method, and the C<error> and
837 C<debug> methods can be called when needed.
839 When defining a producer, one of several things can be passed in: A
840 module name (e.g., C<My::Groovy::Producer>), a module name relative to
841 the C<SQL::Translator::Producer> namespace (e.g., C<MySQL>), a module
842 name and function combination (C<My::Groovy::Producer::transmogrify>),
843 or a reference to an anonymous subroutine. If a full module name is
844 passed in (for the purposes of this method, a string containing "::"
845 is considered to be a module name), it is treated as a package, and a
846 function called "produce" will be invoked: C<$modulename::produce>.
847 If $modulename cannot be loaded, the final portion is stripped off and
848 treated as a function. In other words, if there is no file named
849 F<My/Groovy/Producer/transmogrify.pm>, C<SQL::Translator> will attempt
850 to load F<My/Groovy/Producer.pm> and use C<transmogrify> as the name of
851 the function, instead of the default C<produce>.
853 my $tr = SQL::Translator->new;
855 # This will invoke My::Groovy::Producer::produce($tr, $data)
856 $tr->producer("My::Groovy::Producer");
858 # This will invoke SQL::Translator::Producer::Sybase::produce($tr, $data)
859 $tr->producer("Sybase");
861 # This will invoke My::Groovy::Producer::transmogrify($tr, $data),
862 # assuming that My::Groovy::Producer::transmogrify is not a module
864 $tr->producer("My::Groovy::Producer::transmogrify");
866 # This will invoke the referenced subroutine directly, as
867 # $subref->($tr, $data);
868 $tr->producer(\&my_producer);
870 There is also a method named C<producer_type>, which is a string
871 containing the classname to which the above C<produce> function
872 belongs. In the case of anonymous subroutines, this method returns
875 Finally, there is a method named C<producer_args>, which is both an
876 accessor and a mutator. Arbitrary data may be stored in name => value
877 pairs for the producer subroutine to access:
879 sub My::Random::producer {
880 my ($tr, $data) = @_;
881 my $pr_args = $tr->producer_args();
883 # $pr_args is a hashref.
885 Extra data passed to the C<producer> method is passed to
888 $tr->producer("xSV", delimiter => ',\s*');
890 # In SQL::Translator::Producer::xSV:
891 my $args = $tr->producer_args;
892 my $delimiter = $args->{'delimiter'}; # value is ,\s*
896 The C<parser> method defines or retrieves a subroutine that will be
897 called to perform the parsing. The basic idea is the same as that of
898 C<producer> (see above), except the default subroutine name is
899 "parse", and will be invoked as C<$module_name::parse($tr, $data)>.
900 Also, the parser subroutine will be passed a string containing the
901 entirety of the data to be parsed.
903 # Invokes SQL::Translator::Parser::MySQL::parse()
904 $tr->parser("MySQL");
906 # Invokes My::Groovy::Parser::parse()
907 $tr->parser("My::Groovy::Parser");
909 # Invoke an anonymous subroutine directly
911 my $dumper = Data::Dumper->new([ $_[1] ], [ "SQL" ]);
912 $dumper->Purity(1)->Terse(1)->Deepcopy(1);
913 return $dumper->Dump;
916 There is also C<parser_type> and C<parser_args>, which perform
917 analogously to C<producer_type> and C<producer_args>
921 Toggles whether to print warnings of name conflicts, identifier
922 mutations, etc. Probably only generated by producers to let the user
923 know when something won't translate very smoothly (e.g., MySQL "enum"
924 fields into Oracle). Accepts a true or false value, returns the
929 The C<translate> method calls the subroutines referenced by the
930 C<parser> and C<producer> data members (described above). It accepts
931 as arguments a number of things, in key => value format, including
932 (potentially) a parser and a producer (they are passed directly to the
933 C<parser> and C<producer> methods).
935 Here is how the parameter list to C<translate> is parsed:
941 1 argument means it's the data to be parsed; which could be a string
942 (filename) or a reference to a scalar (a string stored in memory), or a
943 reference to a hash, which is parsed as being more than one argument
946 # Parse the file /path/to/datafile
947 my $output = $tr->translate("/path/to/datafile");
949 # Parse the data contained in the string $data
950 my $output = $tr->translate(\$data);
954 More than 1 argument means its a hash of things, and it might be
955 setting a parser, producer, or datasource (this key is named
956 "filename" or "file" if it's a file, or "data" for a SCALAR reference.
958 # As above, parse /path/to/datafile, but with different producers
959 for my $prod ("MySQL", "XML", "Sybase") {
960 print $tr->translate(
962 filename => "/path/to/datafile",
966 # The filename hash key could also be:
967 datasource => \$data,
973 =head2 filename, data
975 Using the C<filename> method, the filename of the data to be parsed
976 can be set. This method can be used in conjunction with the C<data>
977 method, below. If both the C<filename> and C<data> methods are
978 invoked as mutators, the data set in the C<data> method is used.
980 $tr->filename("/my/data/files/create.sql");
984 my $create_script = do {
986 open CREATE, "/my/data/files/create.sql" or die $!;
989 $tr->data(\$create_script);
991 C<filename> takes a string, which is interpreted as a filename.
992 C<data> takes a reference to a string, which is used as the data to be
993 parsed. If a filename is set, then that file is opened and read when
994 the C<translate> method is called, as long as the data instance
1001 Turns on/off the tracing option of Parse::RecDescent.
1007 Ken Y. Clark, E<lt>kclark@cpan.orgE<gt>,
1008 darren chamberlain E<lt>darren@cpan.orgE<gt>,
1009 Chris Mungall E<lt>cjm@fruitfly.orgE<gt>,
1010 Allen Day E<lt>allenday@users.sourceforge.netE<gt>
1014 This program is free software; you can redistribute it and/or modify
1015 it under the terms of the GNU General Public License as published by
1016 the Free Software Foundation; version 2.
1018 This program is distributed in the hope that it will be useful, but
1019 WITHOUT ANY WARRANTY; without even the implied warranty of
1020 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
1021 General Public License for more details.
1023 You should have received a copy of the GNU General Public License
1024 along with this program; if not, write to the Free Software
1025 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
1030 Please use http://rt.cpan.org/ for reporting bugs.
1035 L<SQL::Translator::Parser>,
1036 L<SQL::Translator::Producer>,
1037 L<Parse::RecDescent>