1 package SQL::Translator::Parser::MySQL;
3 # -------------------------------------------------------------------
4 # $Id: MySQL.pm,v 1.58 2007-03-19 17:15:24 duality72 Exp $
5 # -------------------------------------------------------------------
6 # Copyright (C) 2002-4 SQLFairy Authors
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.
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.
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
21 # -------------------------------------------------------------------
25 SQL::Translator::Parser::MySQL - parser for MySQL
30 use SQL::Translator::Parser::MySQL;
32 my $translator = SQL::Translator->new;
33 $translator->parser("SQL::Translator::Parser::MySQL");
37 The grammar is influenced heavily by Tim Bunce's "mysql2ora" grammar.
39 Here's the word from the MySQL site
40 (http://www.mysql.com/doc/en/CREATE_TABLE.html):
42 CREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name [(create_definition,...)]
43 [table_options] [select_statement]
47 CREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name LIKE old_table_name;
50 col_name type [NOT NULL | NULL] [DEFAULT default_value] [AUTO_INCREMENT]
51 [PRIMARY KEY] [reference_definition]
52 or PRIMARY KEY (index_col_name,...)
53 or KEY [index_name] (index_col_name,...)
54 or INDEX [index_name] (index_col_name,...)
55 or UNIQUE [INDEX] [index_name] (index_col_name,...)
56 or FULLTEXT [INDEX] [index_name] (index_col_name,...)
57 or [CONSTRAINT symbol] FOREIGN KEY [index_name] (index_col_name,...)
58 [reference_definition]
62 TINYINT[(length)] [UNSIGNED] [ZEROFILL]
63 or SMALLINT[(length)] [UNSIGNED] [ZEROFILL]
64 or MEDIUMINT[(length)] [UNSIGNED] [ZEROFILL]
65 or INT[(length)] [UNSIGNED] [ZEROFILL]
66 or INTEGER[(length)] [UNSIGNED] [ZEROFILL]
67 or BIGINT[(length)] [UNSIGNED] [ZEROFILL]
68 or REAL[(length,decimals)] [UNSIGNED] [ZEROFILL]
69 or DOUBLE[(length,decimals)] [UNSIGNED] [ZEROFILL]
70 or FLOAT[(length,decimals)] [UNSIGNED] [ZEROFILL]
71 or DECIMAL(length,decimals) [UNSIGNED] [ZEROFILL]
72 or NUMERIC(length,decimals) [UNSIGNED] [ZEROFILL]
73 or CHAR(length) [BINARY]
74 or VARCHAR(length) [BINARY]
87 or ENUM(value1,value2,value3,...)
88 or SET(value1,value2,value3,...)
94 REFERENCES tbl_name [(index_col_name,...)]
95 [MATCH FULL | MATCH PARTIAL]
96 [ON DELETE reference_option]
97 [ON UPDATE reference_option]
100 RESTRICT | CASCADE | SET NULL | NO ACTION | SET DEFAULT
103 TYPE = {BDB | HEAP | ISAM | InnoDB | MERGE | MRG_MYISAM | MYISAM }
104 or AUTO_INCREMENT = #
105 or AVG_ROW_LENGTH = #
106 or CHECKSUM = {0 | 1}
107 or COMMENT = "string"
110 or PACK_KEYS = {0 | 1 | DEFAULT}
111 or PASSWORD = "string"
112 or DELAY_KEY_WRITE = {0 | 1}
113 or ROW_FORMAT= { default | dynamic | fixed | compressed }
114 or RAID_TYPE= {1 | STRIPED | RAID0 } RAID_CHUNKS=# RAID_CHUNKSIZE=#
115 or UNION = (table_name,[table_name...])
116 or INSERT_METHOD= {NO | FIRST | LAST }
117 or DATA DIRECTORY="absolute path to directory"
118 or INDEX DIRECTORY="absolute path to directory"
120 A subset of the ALTER TABLE syntax that allows addition of foreign keys:
122 ALTER [IGNORE] TABLE tbl_name alter_specification [, alter_specification] ...
125 ADD [CONSTRAINT [symbol]]
126 FOREIGN KEY [index_name] (index_col_name,...)
127 [reference_definition]
129 A subset of INSERT that we ignore:
136 use vars qw[ $DEBUG $VERSION $GRAMMAR @EXPORT_OK ];
137 $VERSION = sprintf "%d.%02d", q$Revision: 1.58 $ =~ /(\d+)\.(\d+)/;
138 $DEBUG = 0 unless defined $DEBUG;
141 use Parse::RecDescent;
143 use Storable qw(dclone);
144 use base qw(Exporter);
146 @EXPORT_OK = qw(parse);
148 # Enable warnings within the Parse::RecDescent module.
149 $::RD_ERRORS = 1; # Make sure the parser dies when it encounters an error
150 $::RD_WARN = 1; # Enable warnings. This will warn on unused rules &c.
151 $::RD_HINT = 1; # Give out hints to help fix problems.
153 use constant DEFAULT_PARSER_VERSION => 30000;
155 $GRAMMAR = << 'END_OF_GRAMMAR';
158 my ( $database_name, %tables, $table_order, @table_comments, %views, $view_order, %procedures, $proc_order );
163 # The "eofile" rule makes the parser fail if any "statement" rule
164 # fails. Otherwise, the first successful match by a "statement"
165 # won't cause the failure needed to know that the parse, as a whole,
168 startrule : statement(s) eofile {
169 { tables => \%tables, database_name => $database_name, views => \%views, procedures =>\%procedures }
185 use : /use/i WORD "$delimiter"
187 $database_name = $item[2];
188 @table_comments = ();
191 set : /set/i /[^;]+/ "$delimiter"
192 { @table_comments = () }
194 drop : /drop/i TABLE /[^;]+/ "$delimiter"
196 drop : /drop/i WORD(s) "$delimiter"
197 { @table_comments = () }
200 # MySQL strings, unlike common SQL strings, can be double-quoted or
201 # single-quoted, and you can escape the delmiters by doubling (but only the
202 # delimiter) or by backslashing.
204 /'(\\.|''|[^\\\'])*'/ |
205 /"(\\.|""|[^\\\"])*"/
206 # For reference, std sql str: /(?:(?:\')(?:[^\']*(?:(?:\'\')[^\']*)*)(?:\'))//
208 nonstring : /[^;\'"]+/
210 statement_body : (string | nonstring)(s?)
212 insert : /insert/i statement_body "$delimiter"
214 delimiter : /delimiter/i /[\S]+/
215 { $delimiter = $item[2] }
217 empty_statement : "$delimiter"
219 alter : ALTER TABLE table_name alter_specification(s /,/) "$delimiter"
221 my $table_name = $item{'table_name'};
222 die "Cannot ALTER table '$table_name'; it does not exist"
223 unless $tables{ $table_name };
224 for my $definition ( @{ $item[4] } ) {
225 $definition->{'extra'}->{'alter'} = 1;
226 push @{ $tables{ $table_name }{'constraints'} }, $definition;
230 alter_specification : ADD foreign_key_def
231 { $return = $item[2] }
233 create : CREATE /database/i WORD "$delimiter"
234 { @table_comments = () }
236 create : CREATE TEMPORARY(?) TABLE opt_if_not_exists(?) table_name '(' create_definition(s /,/) /(,\s*)?\)/ table_option(s?) "$delimiter"
238 my $table_name = $item{'table_name'};
239 $tables{ $table_name }{'order'} = ++$table_order;
240 $tables{ $table_name }{'table_name'} = $table_name;
242 if ( @table_comments ) {
243 $tables{ $table_name }{'comments'} = [ @table_comments ];
244 @table_comments = ();
248 for my $definition ( @{ $item[7] } ) {
249 if ( $definition->{'supertype'} eq 'field' ) {
250 my $field_name = $definition->{'name'};
251 $tables{ $table_name }{'fields'}{ $field_name } =
252 { %$definition, order => $i };
255 if ( $definition->{'is_primary_key'} ) {
256 push @{ $tables{ $table_name }{'constraints'} },
258 type => 'primary_key',
259 fields => [ $field_name ],
264 elsif ( $definition->{'supertype'} eq 'constraint' ) {
265 push @{ $tables{ $table_name }{'constraints'} }, $definition;
267 elsif ( $definition->{'supertype'} eq 'index' ) {
268 push @{ $tables{ $table_name }{'indices'} }, $definition;
272 if ( my @options = @{ $item{'table_option(s?)'} } ) {
273 for my $option ( @options ) {
274 my ( $key, $value ) = each %$option;
275 if ( $key eq 'comment' ) {
276 push @{ $tables{ $table_name }{'comments'} }, $value;
279 push @{ $tables{ $table_name }{'table_options'} }, $option;
287 opt_if_not_exists : /if not exists/i
289 create : CREATE UNIQUE(?) /(index|key)/i index_name /on/i table_name '(' field_name(s /,/) ')' "$delimiter"
291 @table_comments = ();
292 push @{ $tables{ $item{'table_name'} }{'indices'} },
295 type => $item[2] ? 'unique' : 'normal',
301 create : CREATE /trigger/i NAME not_delimiter "$delimiter"
303 @table_comments = ();
306 create : CREATE PROCEDURE NAME not_delimiter "$delimiter"
308 @table_comments = ();
309 my $func_name = $item[3];
311 my $sql = "$item[1] $item[2] $item[3] $item[4]";
313 $procedures{ $func_name }{'order'} = ++$proc_order;
314 $procedures{ $func_name }{'name'} = $func_name;
315 $procedures{ $func_name }{'owner'} = $owner;
316 $procedures{ $func_name }{'sql'} = $sql;
319 PROCEDURE : /procedure/i
322 create : CREATE algorithm /view/i NAME not_delimiter "$delimiter"
324 @table_comments = ();
325 my $view_name = $item[4];
326 my $sql = "$item[1] $item[2] $item[3] $item[4] $item[5]";
328 # Hack to strip database from function calls in SQL
329 $sql =~ s#`\w+`\.(`\w+`\()##g;
331 $views{ $view_name }{'order'} = ++$view_order;
332 $views{ $view_name }{'name'} = $view_name;
333 $views{ $view_name }{'sql'} = $sql;
336 algorithm : /algorithm/i /=/ WORD
338 $return = "$item[1]=$item[3]";
341 not_delimiter : /.*?(?=$delimiter)/is
343 create_definition : constraint
349 comment : /^\s*(?:#|-{2}).*\n/
351 my $comment = $item[1];
352 $comment =~ s/^\s*(#|--)\s*//;
353 $comment =~ s/\s*$//;
357 comment : /\/\*/ /.*?\*\//s
359 my $comment = $item[2];
360 $comment = substr($comment, 0, -2);
361 $comment =~ s/^\s*|\s*$//g;
365 field_comment : /^\s*(?:#|-{2}).*\n/
367 my $comment = $item[1];
368 $comment =~ s/^\s*(#|--)\s*//;
369 $comment =~ s/\s*$//;
374 field_comment2 : /comment/i /'.*?'/
376 my $comment = $item[2];
384 field : field_comment(s?) field_name data_type field_qualifier(s?) field_comment2(?) reference_definition(?) on_update(?) field_comment(s?)
386 my %qualifiers = map { %$_ } @{ $item{'field_qualifier(s?)'} || [] };
387 if ( my @type_quals = @{ $item{'data_type'}{'qualifiers'} || [] } ) {
388 $qualifiers{ $_ } = 1 for @type_quals;
391 my $null = defined $qualifiers{'not_null'}
392 ? $qualifiers{'not_null'} : 1;
393 delete $qualifiers{'not_null'};
395 my @comments = ( @{ $item[1] }, @{ $item[5] }, @{ $item[8] } );
398 supertype => 'field',
399 name => $item{'field_name'},
400 data_type => $item{'data_type'}{'type'},
401 size => $item{'data_type'}{'size'},
402 list => $item{'data_type'}{'list'},
404 constraints => $item{'reference_definition(?)'},
405 comments => [ @comments ],
411 field_qualifier : not_null
414 null => $item{'not_null'},
418 field_qualifier : default_val
421 default => $item{'default_val'},
425 field_qualifier : auto_inc
428 is_auto_inc => $item{'auto_inc'},
432 field_qualifier : primary_key
435 is_primary_key => $item{'primary_key'},
439 field_qualifier : unsigned
442 is_unsigned => $item{'unsigned'},
446 field_qualifier : /character set/i WORD
449 'CHARACTER SET' => $item[2],
453 field_qualifier : /collate/i WORD
460 field_qualifier : /on update/i CURRENT_TIMESTAMP
463 'ON UPDATE' => $item[2],
467 field_qualifier : /unique/i KEY(?)
474 field_qualifier : KEY
481 reference_definition : /references/i table_name parens_field_list(?) match_type(?) on_delete(?) on_update(?)
484 type => 'foreign_key',
485 reference_table => $item[2],
486 reference_fields => $item[3][0],
487 match_type => $item[4][0],
488 on_delete => $item[5][0],
489 on_update => $item[6][0],
493 match_type : /match full/i { 'full' }
495 /match partial/i { 'partial' }
497 on_delete : /on delete/i reference_option
501 /on update/i 'CURRENT_TIMESTAMP'
504 /on update/i reference_option
507 reference_option: /restrict/i |
524 data_type : WORD parens_value_list(s?) type_qualifier(s?)
527 my $size; # field size, applicable only to non-set fields
528 my $list; # set list, applicable only to sets (duh)
530 if ( uc($type) =~ /^(SET|ENUM)$/ ) {
544 qualifiers => $item[3],
548 parens_field_list : '(' field_name(s /,/) ')'
551 parens_value_list : '(' VALUE(s /,/) ')'
554 type_qualifier : /(BINARY|UNSIGNED|ZEROFILL)/i
559 create_index : /create/i /index/i
561 not_null : /not/i /null/i
567 unsigned : /unsigned/i { $return = 0 }
569 #default_val : /default/i /(?:')?[\s\w\d:.-]*(?:')?/
571 # $item[2] =~ s/'//g;
572 # $return = $item[2];
576 /default/i 'CURRENT_TIMESTAMP'
581 /default/i /'(?:.*?\\')*.*?'|(?:')?[\w\d:.-]*(?:')?/
583 $item[2] =~ s/^\s*'|'\s*$//g;
587 auto_inc : /auto_increment/i { 1 }
589 primary_key : /primary/i /key/i { 1 }
591 constraint : primary_key_def
596 foreign_key_def : foreign_key_def_begin parens_field_list reference_definition
599 supertype => 'constraint',
600 type => 'foreign_key',
603 %{ $item{'reference_definition'} },
607 foreign_key_def_begin : /constraint/i /foreign key/i WORD
608 { $return = $item[3] }
610 /constraint/i NAME /foreign key/i
611 { $return = $item[2] }
613 /constraint/i /foreign key/i
617 { $return = $item[2] }
622 primary_key_def : primary_key index_name(?) '(' name_with_opt_paren(s /,/) ')'
625 supertype => 'constraint',
626 name => $item{'index_name(?)'}[0],
627 type => 'primary_key',
632 unique_key_def : UNIQUE KEY(?) index_name(?) '(' name_with_opt_paren(s /,/) ')'
635 supertype => 'constraint',
636 name => $item{'index_name(?)'}[0],
642 normal_index : KEY index_name(?) '(' name_with_opt_paren(s /,/) ')'
645 supertype => 'index',
647 name => $item{'index_name(?)'}[0],
652 fulltext_index : /fulltext/i KEY(?) index_name(?) '(' name_with_opt_paren(s /,/) ')'
655 supertype => 'index',
657 name => $item{'index_name(?)'}[0],
662 name_with_opt_paren : NAME parens_value_list(s?)
663 { $item[2][0] ? "$item[1]($item[2][0][0])" : $item[1] }
665 UNIQUE : /unique/i { 1 }
667 KEY : /key/i | /index/i
669 table_option : /comment/i /=/ /'.*?'/
671 my $comment = $item[3];
674 $return = { comment => $comment };
676 | /(default )?(charset|character set)/i /\s*=\s*/ WORD
678 $return = { 'CHARACTER SET' => $item[3] };
680 | WORD /\s*=\s*/ WORD
682 $return = { $item[1] => $item[3] };
693 TEMPORARY : /temporary/i
708 VALUE : /[-+]?\.?\d+(?:[eE]\d+)?/
712 # remove leading/trailing quotes
714 $val =~ s/^['"]|['"]$//g;
720 CURRENT_TIMESTAMP : /current_timestamp(\(\))?/i
722 { 'CURRENT_TIMESTAMP' }
726 # -------------------------------------------------------------------
728 my ( $translator, $data ) = @_;
729 my $parser = Parse::RecDescent->new($GRAMMAR);
731 local $::RD_TRACE = $translator->trace ? 1 : undef;
732 local $DEBUG = $translator->debug;
734 unless (defined $parser) {
735 return $translator->error("Error instantiating Parse::RecDescent ".
736 "instance: Bad grammer");
739 # Preprocess for MySQL-specific and not-before-version comments from mysqldump
740 my $parser_version = $translator->parser_args->{mysql_parser_version} || DEFAULT_PARSER_VERSION;
741 while ( $data =~ s#/\*!(\d{5})?(.*?)\*/#($1 && $1 > $parser_version ? '' : $2)#es ) {}
743 my $result = $parser->startrule($data);
744 return $translator->error( "Parse failed." ) unless defined $result;
745 warn "Parse result:".Dumper( $result ) if $DEBUG;
747 my $schema = $translator->schema;
748 $schema->name($result->{'database_name'}) if $result->{'database_name'};
751 $result->{'tables'}{ $a }{'order'}
753 $result->{'tables'}{ $b }{'order'}
754 } keys %{ $result->{'tables'} };
756 for my $table_name ( @tables ) {
757 my $tdata = $result->{tables}{ $table_name };
758 my $table = $schema->add_table(
759 name => $tdata->{'table_name'},
760 ) or die $schema->error;
762 $table->comments( $tdata->{'comments'} );
765 $tdata->{'fields'}->{$a}->{'order'}
767 $tdata->{'fields'}->{$b}->{'order'}
768 } keys %{ $tdata->{'fields'} };
770 for my $fname ( @fields ) {
771 my $fdata = $tdata->{'fields'}{ $fname };
772 my $field = $table->add_field(
773 name => $fdata->{'name'},
774 data_type => $fdata->{'data_type'},
775 size => $fdata->{'size'},
776 default_value => $fdata->{'default'},
777 is_auto_increment => $fdata->{'is_auto_inc'},
778 is_nullable => $fdata->{'null'},
779 comments => $fdata->{'comments'},
780 ) or die $table->error;
782 $table->primary_key( $field->name ) if $fdata->{'is_primary_key'};
784 for my $qual ( qw[ binary unsigned zerofill list collate ],
785 'character set', 'on update' ) {
786 if ( my $val = $fdata->{ $qual } || $fdata->{ uc $qual } ) {
787 next if ref $val eq 'ARRAY' && !@$val;
788 $field->extra( $qual, $val );
792 if ( $fdata->{'has_index'} ) {
796 fields => $fdata->{'name'},
797 ) or die $table->error;
800 if ( $fdata->{'is_unique'} ) {
801 $table->add_constraint(
804 fields => $fdata->{'name'},
805 ) or die $table->error;
808 if ( $field->data_type =~ /(set|enum)/i && !$field->size ) {
809 my %extra = $field->extra;
811 for my $len ( map { length } @{ $extra{'list'} || [] } ) {
812 $longest = $len if $len > $longest;
814 $field->size( $longest ) if $longest;
817 for my $cdata ( @{ $fdata->{'constraints'} } ) {
818 next unless $cdata->{'type'} eq 'foreign_key';
819 $cdata->{'fields'} ||= [ $field->name ];
820 push @{ $tdata->{'constraints'} }, $cdata;
825 for my $idata ( @{ $tdata->{'indices'} || [] } ) {
826 my $index = $table->add_index(
827 name => $idata->{'name'},
828 type => uc $idata->{'type'},
829 fields => $idata->{'fields'},
830 ) or die $table->error;
833 if ( my @options = @{ $tdata->{'table_options'} || [] } ) {
834 $table->options( \@options ) or die $table->error;
837 for my $cdata ( @{ $tdata->{'constraints'} || [] } ) {
838 my $constraint = $table->add_constraint(
839 name => $cdata->{'name'},
840 type => $cdata->{'type'},
841 fields => $cdata->{'fields'},
842 reference_table => $cdata->{'reference_table'},
843 reference_fields => $cdata->{'reference_fields'},
844 match_type => $cdata->{'match_type'} || '',
845 on_delete => $cdata->{'on_delete'} || $cdata->{'on_delete_do'},
846 on_update => $cdata->{'on_update'} || $cdata->{'on_update_do'},
847 ) or die $table->error;
850 # After the constrains and PK/idxs have been created, we normalize fields
851 normalize_field($_) for $table->get_fields;
854 my @procedures = sort {
855 $result->{procedures}->{ $a }->{'order'} <=> $result->{procedures}->{ $b }->{'order'}
856 } keys %{ $result->{procedures} };
857 foreach my $proc_name (@procedures) {
858 $schema->add_procedure(
860 owner => $result->{procedures}->{$proc_name}->{owner},
861 sql => $result->{procedures}->{$proc_name}->{sql},
866 $result->{views}->{ $a }->{'order'} <=> $result->{views}->{ $b }->{'order'}
867 } keys %{ $result->{views} };
868 foreach my $view_name (keys %{ $result->{views} }) {
871 sql => $result->{views}->{$view_name}->{sql},
878 # Takes a field, and returns
879 sub normalize_field {
881 my ($size, $type, $list, $changed) = @_;
883 $size = $field->size;
884 $type = $field->data_type;
885 $list = $field->extra->{list} || [];
887 if ( !ref $size && $size eq 0 ) {
888 if ( lc $type eq 'tinyint' ) {
889 $changed = $size != 4;
892 elsif ( lc $type eq 'smallint' ) {
893 $changed = $size != 6;
896 elsif ( lc $type eq 'mediumint' ) {
897 $changed = $size != 9;
900 elsif ( $type =~ /^int(eger)?$/i ) {
901 $changed = $size != 11 || $type ne 'int';
905 elsif ( lc $type eq 'bigint' ) {
906 $changed = $size != 20;
909 elsif ( lc $type =~ /(float|double|decimal|numeric|real|fixed|dec)/ ) {
910 my $old_size = (ref $size || '') eq 'ARRAY' ? $size : [];
911 $changed = @$old_size != 2 && $old_size->[0] != 8 && $old_size->[1] != 2;
916 if ( $type =~ /^tiny(text|blob)$/i ) {
917 $changed = $size != 255;
920 elsif ( $type =~ /^(blob|text)$/i ) {
921 $changed = $size != 65_535;
924 elsif ( $type =~ /^medium(blob|text)$/i ) {
925 $changed = $size != 16_777_215;
928 elsif ( $type =~ /^long(blob|text)$/i ) {
929 $changed = $size != 4_294_967_295;
930 $size = 4_294_967_295;
932 $DB::single = 1 if $field->name eq 'employee_id';
934 # We only want to clone the field, not *everything*
935 { local $field->{table} = undef;
936 $field->parsed_field(dclone($field));
937 $field->parsed_field->{table} = $field->table;
940 $field->data_type($type);
941 $field->extra->{list} = $list if @$list;
947 # -------------------------------------------------------------------
948 # Where man is not nature is barren.
950 # -------------------------------------------------------------------
956 Ken Youens-Clark E<lt>kclark@cpan.orgE<gt>,
957 Chris Mungall E<lt>cjm@fruitfly.orgE<gt>.
961 Parse::RecDescent, SQL::Translator::Schema.