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package Search::QueryParser::SQL; |
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26105
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use warnings; |
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use strict; |
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use Carp; |
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use base qw( Search::QueryParser ); |
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use Data::Dump qw( dump ); |
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15760
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use Search::QueryParser::SQL::Query; |
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use Search::QueryParser::SQL::Column; |
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use Scalar::Util qw( blessed ); |
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1728
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our $VERSION = '0.010'; |
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my $debug = $ENV{PERL_DEBUG} || 0; |
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=head1 NAME |
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Search::QueryParser::SQL - turn free-text queries into SQL WHERE clauses |
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=head1 SYNOPSIS |
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use Search::QueryParser::SQL; |
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my $parser = Search::QueryParser::SQL->new( |
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columns => [qw( first_name last_name email )] |
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); |
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26
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my $query = $parser->parse('joe smith', 1); # 1 for explicit AND |
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print $query; |
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# prints: |
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# (first_name='joe' OR last_name='joe' OR email='joe') AND \ |
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# (first_name='smith' OR last_name='smith' OR email='smith') |
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32
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# for the DBI |
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my $query = $parser->parse('foo'); |
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print $query->dbi->[0]; |
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# prints |
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# (first_name=? OR last_name=? OR email=?) |
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38
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# wildcard support |
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my $query = $parser->parse('foo*'); |
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print $query; |
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# prints |
42
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# (first_name ILIKE 'foo%' OR last_name ILIKE 'foo%' OR email ILIKE 'foo%') |
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44
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45
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=head1 DESCRIPTION |
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47
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Search::QueryParser::SQL is a subclass of Search::QueryParser. |
48
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Chiefly it extends the unparse() method to stringify free-text |
49
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search queries as valid SQL WHERE clauses. |
50
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51
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The idea is to allow you to treat your database like a free-text |
52
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search index, when it really isn't. |
53
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54
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=head1 METHODS |
55
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56
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Only new or overridden method are documented here. |
57
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58
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=cut |
59
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60
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=head2 new( I ) |
61
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62
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Returns a new Parser. In addition to the I documented |
63
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in Search::QueryParser, this new() method supports additional |
64
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I: |
65
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66
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=over |
67
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68
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=item columns |
69
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70
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B |
71
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72
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May be a hash or array ref of column names. If a hash ref, |
73
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the keys should be column names and the values either the column type |
74
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(e.g., int, varchar, etc.) or a hashref of attributes used to |
75
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instantiate a Search::QueryParser::SQL::Column object. |
76
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77
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The values are used for determining correct quoting in strings |
78
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and for operator selection with wildcards. |
79
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If passed as an array ref, all column arguments will be |
80
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treated like 'char'. |
81
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82
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See Search::QueryParser::SQL::Column for more information. |
83
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84
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=item default_column |
85
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86
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I |
87
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88
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The column name or names to be used when no explicit column name is |
89
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used in a query string. If not present, defaults to I. |
90
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91
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=item quote_columns |
92
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93
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I |
94
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95
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The default behaviour is to not quote column names, but some SQL |
96
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dialects expect column names to be quoted (escaped). |
97
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98
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Set this arg to a quote value. Example: |
99
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100
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my $parser = Search::QueryParser::SQL->new( |
101
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columns => [qw( foo bar )], |
102
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quote_columns => '`' |
103
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); |
104
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# query will look like `foo` and `bar` |
105
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106
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=item fuzzify |
107
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108
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I |
109
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110
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Treat all query keywords as if they had wildcards attached to the end. |
111
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E.g., C would be treated like C. |
112
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113
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=item fuzzify2 |
114
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115
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I |
116
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117
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Like fuzzify but prepend wildcards as well. E.g., C would be treated |
118
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like C<*foo*>. |
119
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120
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=item strict |
121
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122
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I |
123
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124
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Croak if any of the column names in I are not among the supplied |
125
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column names in I. |
126
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127
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=item like |
128
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129
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I |
130
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131
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The SQL operator to use for wildcard query strings. The default is |
132
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C. |
133
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134
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=item lower |
135
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136
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I |
137
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138
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Wrap the C function around column names for case-insensitive comparison. |
139
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140
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=item column_class |
141
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142
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I |
143
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144
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The name of the class to bless Column objects into. Default is |
145
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C. |
146
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147
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=back |
148
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149
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=cut |
150
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151
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sub new { |
152
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0
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0
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1
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my $self = shift->SUPER::new( |
153
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@_, |
154
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155
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# add the dot for table.column |
156
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'rxField' => qr/[\.\w]+/, |
157
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158
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# make and/or/not case insensitive |
159
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'rxAnd' => qr/AND|ET|UND|E/i, |
160
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'rxOr' => qr/OR|OU|ODER|O/i, |
161
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'rxNot' => qr/NOT|PAS|NICHT|NON/i, |
162
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); |
163
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0
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0
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my $args = ref $_[0] eq 'HASH' ? $_[0] : {@_}; |
164
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0
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0
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$self->{quote_columns} = delete $args->{quote_columns} || ''; |
165
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0
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0
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$self->{fuzzify} = delete $args->{fuzzify} || 0; |
166
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0
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0
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$self->{fuzzify2} = delete $args->{fuzzify2} || 0; |
167
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0
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0
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$self->{strict} = delete $args->{strict} || 0; |
168
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0
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0
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$self->{like} = delete $args->{like} || 'ILIKE'; |
169
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0
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0
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$self->{lower} = delete $args->{lower} || 0; |
170
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0
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0
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$self->{column_class} = delete $args->{column_class} |
171
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|| 'Search::QueryParser::SQL::Column'; |
172
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173
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0
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0
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my $cols = delete $args->{columns} or croak "columns required"; |
174
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0
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$self->_set_columns($cols); |
175
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176
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$self->{default_column} = delete $args->{default_column} |
177
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0
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0
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|| [ sort keys %{ $self->{columns} } ]; |
178
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179
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0
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0
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if ( !ref( $self->{default_column} ) ) { |
180
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0
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$self->{default_column} = [ $self->{default_column} ]; |
181
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} |
182
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183
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0
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0
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dump $self if $debug; |
184
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185
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0
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return $self; |
186
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} |
187
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188
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sub _set_columns { |
189
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0
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0
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my $self = shift; |
190
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0
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0
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my $cols = shift or croak "columns required"; |
191
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0
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my %columns; |
192
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0
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my $colclass = $self->{column_class}; |
193
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194
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0
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my $reftype = ref($cols); |
195
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0
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0
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0
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if ( !$reftype or ( $reftype ne 'ARRAY' and $reftype ne 'HASH' ) ) { |
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0
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196
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0
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croak "columns must be an ARRAY or HASH ref"; |
197
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} |
198
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199
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# convert simple array to hash |
200
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0
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0
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if ( $reftype eq 'ARRAY' ) { |
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0
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201
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0
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%columns = map { |
202
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0
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$_ => $colclass->new( |
203
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type => 'char', |
204
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name => $_, |
205
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fuzzy_op => $self->{like}, |
206
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fuzzy_not_op => 'NOT ' . $self->{like}, |
207
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) |
208
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} @$cols; |
209
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} |
210
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elsif ( $reftype eq 'HASH' ) { |
211
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0
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for my $name ( keys %$cols ) { |
212
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0
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my $val = $cols->{$name}; |
213
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0
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my $obj; |
214
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0
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0
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if ( blessed($val) ) { |
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0
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0
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215
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0
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$obj = $val; |
216
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} |
217
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elsif ( ref($val) eq 'HASH' ) { |
218
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0
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$obj = $colclass->new($val); |
219
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} |
220
|
|
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elsif ( !ref $val ) { |
221
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0
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|
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|
$obj = $colclass->new( name => $name, type => $val ); |
222
|
0
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0
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|
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|
|
$obj->fuzzy_op( $self->{like} ) if !$obj->is_int; |
223
|
0
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0
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|
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|
|
$obj->fuzzy_not_op( 'NOT ' . $self->{like} ) if !$obj->is_int; |
224
|
|
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|
|
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} |
225
|
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else { |
226
|
0
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|
croak |
227
|
|
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|
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"column value for $name must be a column type, hashref or Column object"; |
228
|
|
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|
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|
} |
229
|
0
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|
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|
|
|
$columns{$name} = $obj; |
230
|
|
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|
|
|
|
} |
231
|
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|
} |
232
|
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|
233
|
|
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|
|
|
|
# normalize everything |
234
|
0
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|
|
|
|
|
for my $name ( keys %columns ) { |
235
|
0
|
|
|
|
|
|
my $column = $columns{$name}; |
236
|
|
|
|
|
|
|
|
237
|
|
|
|
|
|
|
# set the alias as if it were a real column. |
238
|
0
|
0
|
|
|
|
|
if ( defined $column->alias ) { |
239
|
|
|
|
|
|
|
my @aliases |
240
|
0
|
|
|
|
|
|
= ref $column->alias |
241
|
0
|
0
|
|
|
|
|
? @{ $column->alias } |
242
|
|
|
|
|
|
|
: ( $column->alias ); |
243
|
0
|
|
|
|
|
|
for my $al (@aliases) { |
244
|
0
|
|
|
|
|
|
$columns{$al} = $column; |
245
|
|
|
|
|
|
|
} |
246
|
|
|
|
|
|
|
} |
247
|
|
|
|
|
|
|
|
248
|
|
|
|
|
|
|
# shortcut for lookup |
249
|
0
|
|
|
|
|
|
$self->{_is_int}->{$name} = $column->is_int; |
250
|
|
|
|
|
|
|
} |
251
|
|
|
|
|
|
|
|
252
|
0
|
|
|
|
|
|
$self->{columns} = \%columns; |
253
|
0
|
|
|
|
|
|
return $self->{columns}; |
254
|
|
|
|
|
|
|
} |
255
|
|
|
|
|
|
|
|
256
|
|
|
|
|
|
|
=head2 parse( I [, I] ) |
257
|
|
|
|
|
|
|
|
258
|
|
|
|
|
|
|
Acts like parse() method in Search::QueryParser, but |
259
|
|
|
|
|
|
|
returns a Search::QueryParser::SQL::Query object. |
260
|
|
|
|
|
|
|
|
261
|
|
|
|
|
|
|
If a second, true, value is passed as I, |
262
|
|
|
|
|
|
|
the query is assumed to "AND" terms together. The default |
263
|
|
|
|
|
|
|
is to "OR" them together. |
264
|
|
|
|
|
|
|
|
265
|
|
|
|
|
|
|
=cut |
266
|
|
|
|
|
|
|
|
267
|
|
|
|
|
|
|
sub parse { |
268
|
0
|
|
|
0
|
1
|
|
my $self = shift; |
269
|
0
|
0
|
|
|
|
|
my $query = $self->SUPER::parse(@_) |
270
|
|
|
|
|
|
|
or croak "query parse failed: " . $self->err; |
271
|
|
|
|
|
|
|
|
272
|
0
|
0
|
|
|
|
|
if ( $self->{strict} ) { |
273
|
0
|
|
|
|
|
|
for my $key ( keys %$query ) { |
274
|
0
|
0
|
|
|
|
|
next unless defined $query->{$key}; |
275
|
0
|
|
|
|
|
|
for my $subq ( @{ $query->{$key} } ) { |
|
0
|
|
|
|
|
|
|
276
|
0
|
0
|
|
|
|
|
next unless $subq->{field}; |
277
|
0
|
0
|
|
|
|
|
unless ( exists $self->{columns}->{ $subq->{field} } ) { |
278
|
0
|
|
|
|
|
|
croak "invalid column name: $subq->{field}"; |
279
|
|
|
|
|
|
|
} |
280
|
|
|
|
|
|
|
} |
281
|
|
|
|
|
|
|
} |
282
|
|
|
|
|
|
|
} |
283
|
|
|
|
|
|
|
|
284
|
0
|
|
|
|
|
|
$query->{_parser} = $self; |
285
|
0
|
|
|
|
|
|
$query->{_string} = $_[0]; |
286
|
0
|
|
0
|
|
|
|
$query->{_implicit_AND} = $_[1] || 0; |
287
|
|
|
|
|
|
|
|
288
|
|
|
|
|
|
|
#dump $query; |
289
|
0
|
|
|
|
|
|
return bless( $query, 'Search::QueryParser::SQL::Query' ); |
290
|
|
|
|
|
|
|
} |
291
|
|
|
|
|
|
|
|
292
|
|
|
|
|
|
|
=head2 columns |
293
|
|
|
|
|
|
|
|
294
|
|
|
|
|
|
|
Get/set the column descriptions, which is a hashref of |
295
|
|
|
|
|
|
|
Search::QueryParser::SQL::Column objects keyed by the column name. |
296
|
|
|
|
|
|
|
|
297
|
|
|
|
|
|
|
=cut |
298
|
|
|
|
|
|
|
|
299
|
|
|
|
|
|
|
sub columns { |
300
|
0
|
|
|
0
|
1
|
|
my $self = shift; |
301
|
0
|
0
|
|
|
|
|
if (@_) { |
302
|
0
|
|
|
|
|
|
$self->_set_columns(shift); |
303
|
|
|
|
|
|
|
} |
304
|
0
|
|
|
|
|
|
return $self->{columns}; |
305
|
|
|
|
|
|
|
} |
306
|
|
|
|
|
|
|
|
307
|
|
|
|
|
|
|
=head2 get_column( I ) |
308
|
|
|
|
|
|
|
|
309
|
|
|
|
|
|
|
Returns the Column object for I or croaks if it has not been defined. |
310
|
|
|
|
|
|
|
|
311
|
|
|
|
|
|
|
=cut |
312
|
|
|
|
|
|
|
|
313
|
|
|
|
|
|
|
sub get_column { |
314
|
0
|
|
|
0
|
1
|
|
my $self = shift; |
315
|
0
|
0
|
|
|
|
|
my $name = shift or croak "column name required"; |
316
|
0
|
0
|
|
|
|
|
if ( !exists $self->{columns}->{$name} ) { |
317
|
0
|
|
|
|
|
|
croak "column $name not defined"; |
318
|
|
|
|
|
|
|
} |
319
|
0
|
|
|
|
|
|
return $self->{columns}->{$name}; |
320
|
|
|
|
|
|
|
} |
321
|
|
|
|
|
|
|
|
322
|
|
|
|
|
|
|
1; |
323
|
|
|
|
|
|
|
|
324
|
|
|
|
|
|
|
__END__ |