X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FSQL%2FTranslator%2FProducer%2FMySQL.pm;h=6c20e566cf2acca05f098c57bd35aff7d33721bd;hb=1c680eb9aac43c469260f89be06027951722402e;hp=0f42d189c8896ca6521bf05def60906dfc787479;hpb=3c32785b80fceff42ba37b573e49921685121dec;p=dbsrgits%2FSQL-Translator.git diff --git a/lib/SQL/Translator/Producer/MySQL.pm b/lib/SQL/Translator/Producer/MySQL.pm index 0f42d18..6c20e56 100644 --- a/lib/SQL/Translator/Producer/MySQL.pm +++ b/lib/SQL/Translator/Producer/MySQL.pm @@ -1,11 +1,9 @@ package SQL::Translator::Producer::MySQL; # ------------------------------------------------------------------- -# $Id: MySQL.pm,v 1.18 2003-05-03 15:17:23 kycl4rk Exp $ +# $Id: MySQL.pm,v 1.54 2007-11-10 03:36:43 mwz444 Exp $ # ------------------------------------------------------------------- -# Copyright (C) 2003 Ken Y. Clark , -# darren chamberlain , -# Chris Mungall +# Copyright (C) 2002-4 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 @@ -22,21 +20,92 @@ package SQL::Translator::Producer::MySQL; # 02111-1307 USA # ------------------------------------------------------------------- +=head1 NAME + +SQL::Translator::Producer::MySQL - MySQL-specific producer for SQL::Translator + +=head1 SYNOPSIS + +Use via SQL::Translator: + + use SQL::Translator; + + my $t = SQL::Translator->new( parser => '...', producer => 'MySQL', '...' ); + $t->translate; + +=head1 DESCRIPTION + +This module will produce text output of the schema suitable for MySQL. +There are still some issues to be worked out with syntax differences +between MySQL versions 3 and 4 ("SET foreign_key_checks," character sets +for fields, etc.). + +=head2 Table Types + +Normally the tables will be created without any explicit table type given and +so will use the MySQL default. + +Any tables involved in foreign key constraints automatically get a table type +of InnoDB, unless this is overridden by setting the C extra +attribute explicitly on the table. + +=head2 Extra attributes. + +The producer recognises the following extra attributes on the Schema objects. + +=over 4 + +=item field.list + +Set the list of allowed values for Enum fields. + +=item field.binary, field.unsigned, field.zerofill + +Set the MySQL field options of the same name. + +=item field.renamed_from + +Used when producing diffs to say this column is the new name fo the specified +old column. + +=item table.mysql_table_type + +Set the type of the table e.g. 'InnoDB', 'MyISAM'. This will be +automatically set for tables involved in foreign key constraints if it is +not already set explicitly. See L<"Table Types">. + +=item table.mysql_charset, table.mysql_collate + +Set the tables default charater set and collation order. + +=item field.mysql_charset, field.mysql_collate + +Set the fields charater set and collation order. + +=back + +=cut + use strict; -use vars qw[ $VERSION $DEBUG ]; -$VERSION = sprintf "%d.%02d", q$Revision: 1.18 $ =~ /(\d+)\.(\d+)/; +use warnings; +use vars qw[ $VERSION $DEBUG %used_names ]; +$VERSION = sprintf "%d.%02d", q$Revision: 1.54 $ =~ /(\d+)\.(\d+)/; $DEBUG = 0 unless defined $DEBUG; use Data::Dumper; +use SQL::Translator::Schema::Constants; use SQL::Translator::Utils qw(debug header_comment); +# +# Use only lowercase for the keys (e.g. "long" and not "LONG") +# my %translate = ( # # Oracle types # varchar2 => 'varchar', long => 'text', - CLOB => 'longtext', + clob => 'longtext', # # Sybase types @@ -46,204 +115,617 @@ my %translate = ( real => 'double', comment => 'text', bit => 'tinyint', + + # + # Access types + # + 'long integer' => 'integer', + 'text' => 'text', + 'datetime' => 'datetime', ); + +sub preprocess_schema { + my ($class, $schema) = @_; + + # extra->{mysql_table_type} used to be the type. It belongs in options, so + # move it if we find it. Return Engine type if found in extra or options + my $mysql_table_type_to_options = sub { + my ($table) = @_; + + my $extra = $table->extra; + + my $extra_type = delete $extra->{mysql_table_type}; + + # Now just to find if there is already an Engine or Type option... + # and lets normalize it to ENGINE since: + # + # The ENGINE table option specifies the storage engine for the table. + # TYPE is a synonym, but ENGINE is the preferred option name. + # + + # We have to use the hash directly here since otherwise there is no way + # to remove options. + my $options = ( $table->{options} ||= []); + + # This assumes that there isn't both a Type and an Engine option. + for my $idx ( 0..$#{$options} ) { + my ($key, $value) = %{ $options->[$idx] }; + + next unless uc $key eq 'ENGINE' || uc $key eq 'TYPE'; + + # if the extra.mysql_table_type is given, use that + delete $options->[$idx]{$key}; + return $options->[$idx]{ENGINE} = $value || $extra_type; + + } + + if ($extra_type) { + push @$options, { ENGINE => $extra_type }; + return $extra_type; + } + + }; + + # Names are only specific to a given schema + local %used_names = (); + + # + # Work out which tables need to be InnoDB to support foreign key + # constraints. We do this first as we need InnoDB at both ends. + # + foreach my $table ( $schema->get_tables ) { + + $mysql_table_type_to_options->($table); + + foreach my $c( $table->get_constraints ) { + next unless $c->type eq FOREIGN_KEY; + + # Normalize constraint names here. + my $c_name = $c->name; + # Give the constraint a name if it doesn't have one, so it doens't feel + # left out + $c_name = $table->name . '_fk' unless length $c_name; + + $c->name( next_unused_name($c_name) ); + + for my $meth (qw/table reference_table/) { + my $table = $schema->get_table($c->$meth) || next; + next if $mysql_table_type_to_options->($table); + $table->options( { 'ENGINE' => 'InnoDB' } ); + } + } + } +} + sub produce { - my ($translator, $data) = @_; - local $DEBUG = $translator->debug; - my $no_comments = $translator->no_comments; - my $add_drop_table = $translator->add_drop_table; + my $translator = shift; + local $DEBUG = $translator->debug; + local %used_names; + my $no_comments = $translator->no_comments; + my $add_drop_table = $translator->add_drop_table; + my $schema = $translator->schema; + my $show_warnings = $translator->show_warnings || 0; + + my ($qt, $qf) = ('',''); + $qt = '`' if $translator->quote_table_names; + $qf = '`' if $translator->quote_field_names; debug("PKG: Beginning production\n"); - + %used_names = (); my $create; $create .= header_comment unless ($no_comments); + # \todo Don't set if MySQL 3.x is set on command line + $create .= "SET foreign_key_checks=0;\n\n"; - for my $table ( keys %{ $data } ) { + __PACKAGE__->preprocess_schema($schema); + # + # Generate sql + # + my @table_defs =(); + + for my $table ( $schema->get_tables ) { +# print $table->name, "\n"; + push @table_defs, create_table($table, + { add_drop_table => $add_drop_table, + show_warnings => $show_warnings, + no_comments => $no_comments, + quote_table_names => $qt, + quote_field_names => $qf + }); + } - debug("PKG: Looking at table '$table'\n"); - my $table_data = $data->{$table}; -#warn Dumper($table_data); - my @fields = sort { - $table_data->{'fields'}->{$a}->{'order'} - <=> - $table_data->{'fields'}->{$b}->{'order'} - } keys %{$table_data->{'fields'}}; +# print "@table_defs\n"; + push @table_defs, "SET foreign_key_checks=1;\n\n"; - # - # Header. Should this look like what mysqldump produces? - # - $create .= "--\n-- Table: $table\n--\n" unless $no_comments; - $create .= qq[DROP TABLE IF EXISTS $table;\n] if $add_drop_table; - $create .= "CREATE TABLE $table ("; + return wantarray ? ($create, @table_defs) : $create . join ('', @table_defs); +} - # - # Fields - # - for (my $i = 0; $i <= $#fields; $i++) { - my $field = $fields[$i]; - debug("PKG: Looking at field '$field'\n"); - my $field_data = $table_data->{'fields'}->{$field}; - my @fdata = ("", $field); - $create .= "\n"; - - # data type and size - my $attr = uc $field_data->{'data_type'} eq 'SET' - ? 'list' : 'size'; - my @values = @{ $field_data->{ $attr } || [] }; - my $data_type = $field_data->{'data_type'}; - - if ( $data_type eq 'number' ) { - # not an integer - if ( scalar @values > 1 ) { - $data_type = 'double'; - } - elsif ( $values[0] >= 12 ) { - $data_type = 'bigint'; - } - elsif ( $values[0] <= 1 ) { - $data_type = 'tinyint'; - } - else { - $data_type = 'int'; - } - } - elsif ( exists $translate{ $data_type } ) { - $data_type = $translate{ $data_type }; - } +sub create_table +{ + my ($table, $options) = @_; - push @fdata, sprintf "%s%s", - $data_type, - defined( $values[0] ) - ? '(' . join( ', ', @values ) . ')' - : ''; - - # MySQL qualifiers - for my $qual ( qw[ binary unsigned zerofill ] ) { - push @fdata, $qual - if $field_data->{ $qual } || - $field_data->{ uc $qual }; - } + my $qt = $options->{quote_table_names} || ''; + my $qf = $options->{quote_field_names} || ''; - # Null? - push @fdata, "NOT NULL" unless $field_data->{'null'}; - - # Default? XXX Need better quoting! - my $default = $field_data->{'default'}; - if ( defined $default ) { - if ( uc $default eq 'NULL') { - push @fdata, "DEFAULT NULL"; - } else { - push @fdata, "DEFAULT '$default'"; - } - } + my $table_name = $table->name; + debug("PKG: Looking at table '$table_name'\n"); + + # + # Header. Should this look like what mysqldump produces? + # + my $create = ''; + my $drop; + $create .= "--\n-- Table: $qt$table_name$qt\n--\n" unless $options->{no_comments}; + $drop = qq[DROP TABLE IF EXISTS $qt$table_name$qt;\n] if $options->{add_drop_table}; + $create .= "CREATE TABLE $qt$table_name$qt (\n"; + + # + # Fields + # + my @field_defs; + for my $field ( $table->get_fields ) { + push @field_defs, create_field($field, $options); + } - # auto_increment? - push @fdata, "auto_increment" if $field_data->{'is_auto_inc'}; + # + # Indices + # + my @index_defs; + my %indexed_fields; + for my $index ( $table->get_indices ) { + push @index_defs, create_index($index, $options); + $indexed_fields{ $_ } = 1 for $index->fields; + } - # primary key? - # This is taken care of in the indices, could be duplicated here - # push @fdata, "PRIMARY KEY" if $field_data->{'is_primary_key'}; + # + # Constraints -- need to handle more than just FK. -ky + # + my @constraint_defs; + my @constraints = $table->get_constraints; + for my $c ( @constraints ) { + my $constr = create_constraint($c, $options); + push @constraint_defs, $constr if($constr); + + unless ( $indexed_fields{ ($c->fields())[0] } || $c->type ne FOREIGN_KEY ) { + push @index_defs, "INDEX ($qf" . ($c->fields())[0] . "$qf)"; + $indexed_fields{ ($c->fields())[0] } = 1; + } + } + $create .= join(",\n", map { " $_" } + @field_defs, @index_defs, @constraint_defs + ); - $create .= (join " ", '', @fdata); - $create .= "," unless ($i == $#fields); - } + # + # Footer + # + $create .= "\n)"; + $create .= generate_table_options($table) || ''; + $create .= ";\n\n"; - # - # Indices - # - my @index_creates; - my @indices = @{ $table_data->{'indices'} || [] }; - my @constraints = @{ $table_data->{'constraints'} || [] }; - - for my $key ( @indices, @constraints ) { - my ($name, $type, $fields) = @{ $key }{ qw[ name type fields ] }; - $name ||= ''; - $type ||= ''; - my $index_type = - $type eq 'primary_key' ? 'PRIMARY KEY' : - $type eq 'unique' ? 'UNIQUE KEY' : - $type eq 'key' ? 'KEY' : - $type eq 'normal' ? 'KEY' : ''; - - next unless $index_type; - push @index_creates, - " $index_type $name (" . join( ', ', @$fields ) . ')'; + return $drop ? ($drop,$create) : $create; +} + +sub generate_table_options +{ + my ($table) = @_; + my $create; + + my $table_type_defined = 0; + for my $t1_option_ref ( $table->options ) { + my($key, $value) = %{$t1_option_ref}; + $table_type_defined = 1 + if uc $key eq 'ENGINE' or uc $key eq 'TYPE'; + $create .= " $key=$value"; + } + + my $mysql_table_type = $table->extra('mysql_table_type'); + $create .= " ENGINE=$mysql_table_type" + if $mysql_table_type && !$table_type_defined; + my $charset = $table->extra('mysql_charset'); + my $collate = $table->extra('mysql_collate'); + my $comments = $table->comments; + + $create .= " DEFAULT CHARACTER SET $charset" if $charset; + $create .= " COLLATE $collate" if $collate; + $create .= qq[ comment='$comments'] if $comments; + return $create; +} + +sub create_field +{ + my ($field, $options) = @_; + + my $qf = $options->{quote_field_names} ||= ''; + + my $field_name = $field->name; + debug("PKG: Looking at field '$field_name'\n"); + my $field_def = "$qf$field_name$qf"; + + # data type and size + my $data_type = $field->data_type; + my @size = $field->size; + my %extra = $field->extra; + my $list = $extra{'list'} || []; + # \todo deal with embedded quotes + my $commalist = join( ', ', map { qq['$_'] } @$list ); + my $charset = $extra{'mysql_charset'}; + my $collate = $extra{'mysql_collate'}; + + # + # Oracle "number" type -- figure best MySQL type + # + if ( lc $data_type eq 'number' ) { + # not an integer + if ( scalar @size > 1 ) { + $data_type = 'double'; + } + elsif ( $size[0] && $size[0] >= 12 ) { + $data_type = 'bigint'; + } + elsif ( $size[0] && $size[0] <= 1 ) { + $data_type = 'tinyint'; } + else { + $data_type = 'int'; + } + } + # + # Convert a large Oracle varchar to "text" + # + elsif ( $data_type =~ /char/i && $size[0] > 255 ) { + $data_type = 'text'; + @size = (); + } + elsif ( $data_type =~ /char/i && ! $size[0] ) { + @size = (255); + } + elsif ( $data_type =~ /boolean/i ) { + $data_type = 'enum'; + $commalist = "'0','1'"; + } + elsif ( exists $translate{ lc $data_type } ) { + $data_type = $translate{ lc $data_type }; + } + + @size = () if $data_type =~ /(text|blob)/i; - if ( @index_creates ) { - $create .= join(",\n", '', @index_creates); + if ( $data_type =~ /(double|float)/ && scalar @size == 1 ) { + push @size, '0'; + } + + $field_def .= " $data_type"; + + if ( lc $data_type eq 'enum' ) { + $field_def .= '(' . $commalist . ')'; + } + elsif ( defined $size[0] && $size[0] > 0 ) { + $field_def .= '(' . join( ', ', @size ) . ')'; + } + + # char sets + $field_def .= " CHARACTER SET $charset" if $charset; + $field_def .= " COLLATE $collate" if $collate; + + # MySQL qualifiers + for my $qual ( qw[ binary unsigned zerofill ] ) { + my $val = $extra{ $qual } || $extra{ uc $qual } or next; + $field_def .= " $qual"; + } + for my $qual ( 'character set', 'collate', 'on update' ) { + my $val = $extra{ $qual } || $extra{ uc $qual } or next; + $field_def .= " $qual $val"; + } + + # Null? + $field_def .= ' NOT NULL' unless $field->is_nullable; + + # Default? XXX Need better quoting! + my $default = $field->default_value; + if ( defined $default ) { + if ( uc $default eq 'NULL') { + $field_def .= ' DEFAULT NULL'; + } else { + $field_def .= " DEFAULT '$default'"; } + } + + if ( my $comments = $field->comments ) { + $field_def .= qq[ comment '$comments']; + } + + # auto_increment? + $field_def .= " auto_increment" if $field->is_auto_increment; + + return $field_def; +} + +sub alter_create_index +{ + my ($index, $options) = @_; + + my $qt = $options->{quote_table_names} || ''; + my $qf = $options->{quote_field_names} || ''; + + return join( ' ', + 'ALTER TABLE', + $qt.$index->table->name.$qt, + 'ADD', + create_index(@_) + ); +} + +sub create_index +{ + my ($index, $options) = @_; + + my $qf = $options->{quote_field_names} || ''; + + return join( ' ', + lc $index->type eq 'normal' ? 'INDEX' : $index->type . ' INDEX', + $index->name, + '(' . $qf . join( "$qf, $qf", $index->fields ) . $qf . ')' + ); + +} + +sub alter_drop_index +{ + my ($index, $options) = @_; + + my $qt = $options->{quote_table_names} || ''; + my $qf = $options->{quote_field_names} || ''; + + return join( ' ', + 'ALTER TABLE', + $qt.$index->table->name.$qt, + 'DROP', + 'INDEX', + $index->name || $index->fields + ); + +} + +sub alter_drop_constraint +{ + my ($c, $options) = @_; + + my $qt = $options->{quote_table_names} || ''; + my $qc = $options->{quote_constraint_names} || ''; + my $out = sprintf('ALTER TABLE %s DROP %s %s', + $c->table->name, + $c->type, + $qc . $c->name . $qc ); + + return $out; +} + +sub alter_create_constraint +{ + my ($index, $options) = @_; + + my $qt = $options->{quote_table_names} || ''; + return join( ' ', + 'ALTER TABLE', + $qt.$index->table->name.$qt, + 'ADD', + create_constraint(@_) ); +} + +sub create_constraint +{ + my ($c, $options) = @_; + + my $qf = $options->{quote_field_names} || ''; + my $qt = $options->{quote_table_names} || ''; + my $leave_name = $options->{leave_name} || undef; + + my @fields = $c->fields or next; + + if ( $c->type eq PRIMARY_KEY ) { + return 'PRIMARY KEY (' . $qf . join("$qf, $qf", @fields). $qf . ')'; + } + elsif ( $c->type eq UNIQUE ) { + return + 'UNIQUE '. + (defined $c->name ? $qf.$c->name.$qf.' ' : ''). + '(' . $qf . join("$qf, $qf", @fields). $qf . ')'; + } + elsif ( $c->type eq FOREIGN_KEY ) { # - # Constraints -- need to handle more than just FK. -ky + # Make sure FK field is indexed or MySQL complains. # - my @constraint_defs; - for my $constraint ( @constraints ) { - my $name = $constraint->{'name'} || ''; - my $type = $constraint->{'type'}; - my $fields = $constraint->{'fields'}; - my $ref_table = $constraint->{'reference_table'}; - my $ref_fields = $constraint->{'reference_fields'}; - my $match_type = $constraint->{'match_type'} || ''; - my $on_delete = $constraint->{'on_delete_do'}; - my $on_update = $constraint->{'on_update_do'}; - - if ( $type eq 'foreign_key' ) { - my $def = join(' ', map { $_ || () } ' FOREIGN KEY', $name ); - if ( @$fields ) { - $def .= ' (' . join( ', ', @$fields ) . ')'; - } - $def .= " REFERENCES $ref_table"; - - if ( @{ $ref_fields || [] } ) { - $def .= ' (' . join( ', ', @$ref_fields ) . ')'; - } - - if ( $match_type ) { - $def .= ' MATCH ' . - ( $match_type =~ /full/i ) ? 'FULL' : 'PARTIAL'; - } - - if ( @{ $on_delete || [] } ) { - $def .= ' ON DELETE '.join(' ', @$on_delete); - } - - if ( @{ $on_update || [] } ) { - $def .= ' ON UPDATE '.join(' ', @$on_update); - } - - push @constraint_defs, $def; + + my $table = $c->table; + my $c_name = $c->name; + + my $def = join(' ', + map { $_ || () } + 'CONSTRAINT', + $qt . $c_name . $qt, + 'FOREIGN KEY' + ); + + + $def .= ' ('.$qf . join( "$qf, $qf", @fields ) . $qf . ')'; + + $def .= ' REFERENCES ' . $qt . $c->reference_table . $qt; + + my @rfields = map { $_ || () } $c->reference_fields; + unless ( @rfields ) { + my $rtable_name = $c->reference_table; + if ( my $ref_table = $table->schema->get_table( $rtable_name ) ) { + push @rfields, $ref_table->primary_key; + } + else { + warn "Can't find reference table '$rtable_name' " . + "in schema\n" if $options->{show_warnings}; } } - $create .= join(",\n", '', @constraint_defs) if @constraint_defs; + if ( @rfields ) { + $def .= ' (' . $qf . join( "$qf, $qf", @rfields ) . $qf . ')'; + } + else { + warn "FK constraint on " . $table->name . '.' . + join('', @fields) . " has no reference fields\n" + if $options->{show_warnings}; + } - # - # Footer - # - $create .= "\n)"; - while ( - my ( $key, $val ) = each %{ $table_data->{'table_options'} ||= {} } - ) { - $create .= " $key=$val" + if ( $c->match_type ) { + $def .= ' MATCH ' . + ( $c->match_type =~ /full/i ) ? 'FULL' : 'PARTIAL'; } - $create .= ";\n\n"; + + if ( $c->on_delete ) { + $def .= ' ON DELETE '.join( ' ', $c->on_delete ); + } + + if ( $c->on_update ) { + $def .= ' ON UPDATE '.join( ' ', $c->on_update ); + } + return $def; } - return $create; + return undef; +} + +sub alter_table +{ + my ($to_table, $options) = @_; + + my $qt = $options->{quote_table_name} || ''; + + my $table_options = generate_table_options($to_table) || ''; + my $out = sprintf('ALTER TABLE %s%s', + $qt . $to_table->name . $qt, + $table_options); + + return $out; +} + +sub rename_field { alter_field(@_) } +sub alter_field +{ + my ($from_field, $to_field, $options) = @_; + + my $qf = $options->{quote_field_name} || ''; + my $qt = $options->{quote_table_name} || ''; + + my $out = sprintf('ALTER TABLE %s CHANGE COLUMN %s %s', + $qt . $to_field->table->name . $qt, + $qf . $from_field->name . $qf, + create_field($to_field, $options)); + + return $out; +} + +sub add_field +{ + my ($new_field, $options) = @_; + + my $qt = $options->{quote_table_name} || ''; + + my $out = sprintf('ALTER TABLE %s ADD COLUMN %s', + $qt . $new_field->table->name . $qt, + create_field($new_field, $options)); + + return $out; + +} + +sub drop_field +{ + my ($old_field, $options) = @_; + + my $qf = $options->{quote_field_name} || ''; + my $qt = $options->{quote_table_name} || ''; + + my $out = sprintf('ALTER TABLE %s DROP COLUMN %s', + $qt . $old_field->table->name . $qt, + $qf . $old_field->name . $qf); + + return $out; + +} + +sub batch_alter_table { + my ($table, $diff_hash, $options) = @_; + + my @stmts = map { + if (@{ $diff_hash->{$_} || [] }) { + my $meth = __PACKAGE__->can($_) or die __PACKAGE__ . " cant $_"; + map { $meth->(ref $_ eq 'ARRAY' ? @$_ : $_) } @{ $diff_hash->{$_} } + } else { () } + } qw/alter_drop_constraint + alter_drop_index + drop_field + add_field + alter_field + rename_field + alter_create_index + alter_create_constraint + alter_table/; + + return unless @stmts; + # Just zero or one stmts. return now + return "@stmts;" unless @stmts > 1; + + # Now strip off the 'ALTER TABLE xyz' of all but the first one + + my $qt = $options->{quote_table_name} || ''; + my $table_name = $qt . $table->name . $qt; + + my $first = shift @stmts; + my ($alter_table) = $first =~ /^(ALTER TABLE \Q$table_name\E )/; + my $re = qr/^$alter_table/; + my $padd = " " x length($alter_table); + + return join( ",\n", $first, map { s/$re//; $padd . $_ } @stmts) . ';'; +} + +sub drop_table { + my ($table) = @_; + + # Drop (foreign key) constraints so table drops cleanly + my @sql = batch_alter_table($table, { alter_drop_constraint => [ grep { $_->type eq 'FOREIGN KEY' } $table->get_constraints ] }); + + return join("\n", @sql, "DROP TABLE $table;"); + +} + +sub next_unused_name { + my $name = shift || ''; + if ( !defined($used_names{$name}) ) { + $used_names{$name} = $name; + return $name; + } + + my $i = 1; + while ( defined($used_names{$name . '_' . $i}) ) { + ++$i; + } + $name .= '_' . $i; + $used_names{$name} = $name; + return $name; } 1; -__END__ -=head1 NAME +# ------------------------------------------------------------------- -SQL::Translator::Producer::MySQL - MySQL-specific producer for SQL::Translator +=pod -=head1 AUTHOR +=head1 SEE ALSO + +SQL::Translator, http://www.mysql.com/. + +=head1 AUTHORS darren chamberlain Edarren@cpan.orgE, -Ken Y. Clark Ekclark@cpan.orgE +Ken Y. Clark Ekclark@cpan.orgE. + +=cut