1 package SQL::Translator::Parser::xSV;
3 # -------------------------------------------------------------------
4 # Copyright (C) 2002-2009 SQLFairy Authors
6 # This program is free software; you can redistribute it and/or
7 # modify it under the terms of the GNU General Public License as
8 # published by the Free Software Foundation; version 2.
10 # This program is distributed in the hope that it will be useful, but
11 # WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 # General Public License for more details.
15 # You should have received a copy of the GNU General Public License
16 # along with this program; if not, write to the Free Software
17 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 # -------------------------------------------------------------------
23 SQL::Translator::Parser::xSV - parser for arbitrarily delimited text files
28 use SQL::Translator::Parser::xSV;
30 my $translator = SQL::Translator->new(
32 parser_args => { field_separator => "\t" },
37 Parses arbitrarily delimited text files. See the
38 Text::RecordParser manpage for arguments on how to parse the file
39 (e.g., C<field_separator>, C<record_separator>). Other arguments
48 Indicates that the columns should be scanned to determine data types
49 and field sizes. True by default.
53 A shortcut to sending filters to Text::RecordParser, will create
54 callbacks that trim leading and trailing spaces from fields and headers.
59 Field names will automatically be normalized by
60 C<SQL::Translator::Utils::normalize_name>.
65 use vars qw($VERSION @EXPORT);
69 use Text::ParseWords qw(quotewords);
70 use Text::RecordParser;
71 use SQL::Translator::Utils qw(debug normalize_name);
73 use base qw(Exporter);
77 # Passed a SQL::Translator instance and a string containing the data
80 my ( $tr, $data ) = @_;
81 my $args = $tr->parser_args;
82 my $parser = Text::RecordParser->new(
83 field_separator => $args->{'field_separator'} || ',',
84 record_separator => $args->{'record_separator'} || "\n",
86 header_filter => \&normalize_name,
89 $parser->field_filter( sub { $_ = shift || ''; s/^\s+|\s+$//g; $_ } )
90 unless defined $args->{'trim_fields'} && $args->{'trim_fields'} == 0;
92 my $schema = $tr->schema;
93 my $table = $schema->add_table( name => 'table1' );
96 # Get the field names from the first row.
99 my @field_names = $parser->field_list;
101 for ( my $i = 0; $i < @field_names; $i++ ) {
102 my $field = $table->add_field(
103 name => $field_names[$i],
108 is_auto_increment => undef,
109 ) or die $table->error;
112 $table->primary_key( $field->name );
113 $field->is_primary_key(1);
118 # If directed, look at every field's values to guess size and type.
121 defined $args->{'scan_fields'} &&
122 $args->{'scan_fields'} == 0
124 my %field_info = map { $_, {} } @field_names;
125 while ( my $rec = $parser->fetchrow_hashref ) {
126 for my $field ( @field_names ) {
127 my $data = defined $rec->{ $field } ? $rec->{ $field } : '';
128 my $size = [ length $data ];
131 if ( $data =~ /^-?\d+$/ ) {
135 $data =~ /^-?[,\d]+\.[\d+]?$/
137 $data =~ /^-?[,\d]+?\.\d+$/
143 map { s/,//g; length $_ || 1 } split( /\./, $data );
144 $size = [ $w + $d, $d ];
151 next unless defined $size->[ $i ];
152 my $fsize = $field_info{ $field }{'size'}[ $i ] || 0;
153 if ( $size->[ $i ] > $fsize ) {
154 $field_info{ $field }{'size'}[ $i ] = $size->[ $i ];
158 $field_info{ $field }{ $type }++;
162 for my $field ( keys %field_info ) {
163 my $size = $field_info{ $field }{'size'} || [ 1 ];
165 $field_info{ $field }{'char'} ? 'char' :
166 $field_info{ $field }{'float'} ? 'float' :
167 $field_info{ $field }{'integer'} ? 'integer' : 'char';
169 if ( $data_type eq 'char' && scalar @$size == 2 ) {
170 $size = [ $size->[0] + $size->[1] ];
173 my $field = $table->get_field( $field );
174 $field->size( $size );
175 $field->data_type( $data_type );
188 Darren Chamberlain E<lt>darren@cpan.orgE<gt>,
189 Ken Y. Clark E<lt>kclark@cpan.orgE<gt>.
193 Text::RecordParser, SQL::Translator.