Search::QueryParser::SQL(3)

NAME
Search::QueryParser::SQL - turn free-text queries into SQL WHERE clauses

SYNOPSIS
 use Search::QueryParser::SQL;
 my $parser = Search::QueryParser::SQL->new(
            columns => [qw( first_name last_name email )]
        );

 my $query = $parser->parse('joe smith', 1); # 1 for explicit AND
 print $query;
 # prints:
 # (first_name='joe' OR last_name='joe' OR email='joe') AND \
 # (first_name='smith' OR last_name='smith' OR email='smith')

 # for the DBI
 my $query = $parser->parse('foo');
 print $query->dbi->[0];
 # prints
 # (first_name=? OR last_name=? OR email=?)

 # wildcard support
 my $query = $parser->parse('foo*');
 print $query;
 # prints
 # (first_name ILIKE 'foo%' OR last_name ILIKE 'foo%' OR email ILIKE 'foo%')

DESCRIPTION
Search::QueryParser::SQL is a subclass of Search::QueryParser. Chiefly it extends the unparse() method to stringify free-text search queries as valid SQL WHERE clauses.

The idea is to allow you to treat your database like a free-text search index, when it really isn't.

METHODS
Only new or overridden method are documented here.

  new( args )
Returns a new Parser. In addition to the args documented in Search::QueryParser, this new() method supports additional args:

columns
    Required

    May be a hash or array ref of column names. If a hash ref, the keys should be column names and the values either the column type (e.g., int, varchar, etc.) or a hashref of attributes used to instantiate a Search::QueryParser::SQL::Column object.

    The values are used for determining correct quoting in strings and for operator selection with wildcards. If passed as an array ref, all column arguments will be treated like 'char'.

    See Search::QueryParser::SQL::Column for more information.

default_column
    Optional

    The column name or names to be used when no explicit column name is used in a query string. If not present, defaults to columns.

quote_columns
    Optional

    The default behaviour is to not quote column names, but some SQL dialects expect column names to be quoted (escaped).

    Set this arg to a quote value. Example:

     my $parser = Search::QueryParser::SQL->new(
                columns         => [qw( foo bar )],
                quote_columns   => '`'
                );
     # query will look like `foo` and `bar`

fuzzify
    Optional

    Treat all query keywords as if they had wildcards attached to the end. E.g., "foo" would be treated like "foo*".

fuzzify2
    Optional

    Like fuzzify but prepend wildcards as well. E.g., "foo" would be treated like "*foo*".

strict
    Optional

    Croak if any of the column names in string are not among the supplied column names in columns.

like
    Optional

    The SQL operator to use for wildcard query strings. The default is "ILIKE".

lower
    Optional

    Wrap the LOWER() function around column names for case-insensitive comparison.

column_class
    Optional

    The name of the class to bless Column objects into. Default is "Search::QueryParser::SQL::Column".

  parse( string [, implicit_AND] )
Acts like parse() method in Search::QueryParser, but returns a Search::QueryParser::SQL::Query object.

If a second, true, value is passed as implicit_AND, the query is assumed to "AND" terms together. The default is to "OR" them together.

  columns
Get/set the column descriptions, which is a hashref of Search::QueryParser::SQL::Column objects keyed by the column name.

  get_column( name )
Returns the Column object for name or croaks if it has not been defined.

AUTHOR
Peter Karman, "<karman@cpan.org>"

BUGS
Please report any bugs or feature requests to "bug-search-queryparser-sql@rt.cpan.org", or through the web interface at <http://rt.cpan.org>. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

ACKNOWLEDGEMENTS
The Minnesota Supercomputing Institute "http://www.msi.umn.edu/" sponsored the development of this software.

COPYRIGHT & LICENSE
Copyright 2008 by the Regents of the University of Minnesota.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.