2 # this file implements index functions using DBI
3 # and huge amounts of memory for cache speedup
5 # this version doesn't support ident (which sould be location in
6 # library). But, that functionality is not used anyway...
20 my $bench_time = time();
28 print STDERR "last operation took ",time()-$bench_time," seconds...\n";
30 print STDERR "$msg\n";
38 my $dbd = shift || die "need dbi_dbd= in [global] section of configuration file";
39 my $dsn = shift || die "need dbi_dsn= in [global] section of configuration file";
40 my $user = shift || die "need dbi_user= in [global] section of configuration file";
41 my $passwd = shift || die "need dbi_passwd= in [global] section of configuration file";
45 $self->{dbh} = DBI->connect("DBI:$dbd:$dsn",$user,$passwd) || die $DBI::errstr;
48 $self->bench("connected to $dbd as $user");
50 # force SQLite to support binary 0 in data (which shouldn't
51 # happend, but it did to me)
54 $self->{dbh}->{sqlite_handle_binary_nulls} = 1;
60 sub delete_and_create {
63 my $index = shift || croak "need index name!";
64 my $sql = shift || croak "need sql to create table!";
66 print STDERR "## delete_and_create($index)\n" if ($debug);
68 my $sql_delete = "delete from $index";
69 my $sth = $self->{dbh}->prepare($sql_delete) || confess "can't prepare: $sql_delete";
71 if ($sth->execute()) {
72 print STDERR "## deleted rows from table $index\n" if ($debug);
74 # can't delete from table, assume it doesn't exists!
75 $self->{dbh}->rollback;
76 $self->{dbh}->do($sql) || confess "SQL: $sql ".$self->{dbh}->errstr();
77 print STDERR "## creating table $index\n" if ($debug);
78 $self->{dbh}->begin_work;
86 my $index_data = shift || print STDERR "\$index->insert($field,NULL,...)";
87 my $display = shift || $index_data;
91 print STDERR "\$index->insert() -- no value to insert\n";
95 $index_data =~ s#&(\w)(acute|cedil|circ|grave|ring|slash|tilde|uml);#$1#gi;
98 $index_data =~ s#^\s+##;
99 $index_data =~ s#\s+$##;
100 $index_data =~ s#\s\s+# #g;
102 my $uc = uc($index_data);
104 if (! $self->{c}->{$uc}->{$field}) {
105 #print stderr "in index: $index_data\n";
106 $self->{c}->{$uc}->{$field}->{item} = $index_data;
107 $self->{c}->{$uc}->{$field}->{display} = $display;
110 $self->{c}->{$uc}->{$field}->{count}++;
111 $self->{c}->{$uc}->{$field}->{filter}->{$filter}++ if ($filter);
120 my $sql = "select count(*) from index where name = ? and upper(item) like upper(?)||'%'";
122 my $sth = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr();
123 $sth->execute($field,$where) || die "sql: $sql; ".$self->{dbh}->errstr();
125 my ($total) = $sth->fetchrow_array();
127 # no results, count all
129 my $sql = "select count(*) from index wheere name = ?";
131 my $sth = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr();
132 $sth->execute($field) || die "sql: $sql; ".$self->{dbh}->errstr();
133 $total = $sth->fetchrow_array();
147 my $offset = shift || 0;
148 my $rows = shift || 10;
154 select item,display,count
163 my $sql2 = "select ord from index where name = ? and upper(item) like upper(?)||'%'";
164 my $sth = $self->{dbh}->prepare($sql2) || die "sql2: $sql2; ".$self->{dbh}->errstr();
166 $sth->execute($field, $where) || die "sql2: $sql2; ".$self->{dbh}->errstr();
167 if (my $row = $sth->fetchrow_hashref) {
168 $from_ord += $row->{ord} - 1;
170 # if no match is found when searching from beginning
171 # of word in index, try substring match anywhere
172 $sql2 = "select ord from index where name = ? and upper(item) like '% '||upper(?)||'%'";
173 $sth = $self->{dbh}->prepare($sql2) || die "sql2: $sql2; ".$self->{dbh}->errstr();
174 $sth->execute($field, $where) || die "sql2: $sql2; ".$self->{dbh}->errstr();
175 if (my $row = $sth->fetchrow_hashref) {
176 $from_ord += $row->{ord} - 1;
181 my $sth = $self->{dbh}->prepare($sql) || die "prepare: $sql; ".$self->{dbh}->errstr();
182 $sth->execute($field,$from_ord,$rows,$offset) || die "execute: $sql; ".$self->{dbh}->errstr();
184 while (my $row = $sth->fetchrow_hashref) {
185 $row->{item} = HTML::Entities::encode($row->{item},' <>&"');
186 $row->{display} = HTML::Entities::encode($row->{display},'<>&"');
187 $row->{item} =~ s#&(\w)(acute|cedil|circ|grave|ring|slash|tilde|uml);#$1#gi;
188 $row->{display} =~ s#&(\w)(acute|cedil|circ|grave|ring|slash|tilde|uml);#&$1$2;#gi;
197 return if (! $self->{dbh});
199 $self->{dbh}->begin_work || die $self->{dbh}->errstr();
201 $self->delete_and_create('index', qq{
208 primary key (name,ord)
212 $self->delete_and_create('filters', qq{
213 create table filters (
217 primary key (filter,ord)
221 $self->bench("getting all entries");
222 my @items = keys %{$self->{c}};
223 $self->bench("got ".($#items+1)." items, now sorting");
224 @items = sort @items;
226 my $sql = "insert into index (name,ord,item,display,count) values (?,?,?,?,?)";
227 my $sth_index = $self->{dbh}->prepare($sql) || confess "$sql: ".$self->{dbh}->errstr();
229 $sql = "insert into filters (filter, ord, count) values (?,?,?)";
230 my $sth_filter = $self->{dbh}->prepare($sql) || confess "$sql: ".$self->{dbh}->errstr();
233 foreach my $key (@items) {
235 foreach my $field (keys %{$self->{c}->{$key}}) {
240 $self->{c}->{$key}->{$field}->{item},
241 $self->{c}->{$key}->{$field}->{display},
242 $self->{c}->{$key}->{$field}->{count},
246 next unless ($self->{c}->{$key}->{$field}->{filter});
248 foreach my $filter (keys %{$self->{c}->{$key}->{$field}->{filter}}) {
249 $sth_filter->execute( $filter, $ord, $self->{c}->{$key}->{$field}->{filter}->{$filter} );
256 $self->{dbh}->commit || die $self->{dbh}->errstr();
258 $self->bench("vacuuming");
260 if ($self->{dbd} =~ m/(Pg|SQLite)/) {
261 $self->{dbh}->do(qq{vacuum}) || carp "vacumming failed. It shouldn't if you are using PostgreSQL or SQLite: ".$self->{dbh}->errstr();
264 $self->bench("disconnecting from database");
266 $self->{dbh}->disconnect;
272 print STDERR "index_DBI fatal error: \$index->close() not called... $Count references left!\n" if ($Count > 0);
274 # print STDERR "usage\ttable\n";
275 # foreach (keys %Table) {
276 # print STDERR $Table{$_},"\t$_\n";