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...
18 my %Table; # index tables which where visited in this run
19 my %sth_cache; # cache prepared statements
26 my $bench_time = time();
32 print STDERR "last operation took ",time()-$bench_time," seconds...\n";
34 print STDERR "$msg\n";
42 my $dbd = shift || die "need dbi_dbd= in [global] section of configuration file";
43 my $dsn = shift || die "need dbi_dsn= in [global] section of configuration file";
44 my $user = shift || die "need dbi_user= in [global] section of configuration file";
45 my $passwd = shift || die "need dbi_passwd= in [global] section of configuration file";
49 $self->{dbh} = DBI->connect("DBI:$dbd:$dsn",$user,$passwd) || die $DBI::errstr;
52 $self->bench("connected to $dbd as $user");
57 sub delete_and_create {
62 #print "#### delete_and_create($field)\n";
64 my $sql = "select count(*) from $field";
65 my $sth = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr();
66 # FIX: this is not a good way to check if table exists!
67 if ($sth->execute() && $sth->fetchrow_hashref) {
68 my $sql = "drop table $field";
69 my $sth = $self->{dbh}->do($sql) || die "SQL: $sql ".$self->{dbh}->errstr();
71 $sql = "create table $field (
79 $sth = $self->{dbh}->do($sql) || warn "SQL: $sql ".$self->{dbh}->errstr();
86 my $index_data = shift || print STDERR "\$index->insert($field,NULL,...)";
87 my $display = shift || $index_data;
90 print STDERR "\$index->insert() -- no value to insert\n";
96 #$sth_cache{$field."select"}->execute($index_data) || die "cache: $field select; ".$self->{dbh}->errstr();
98 # XXX for some strange reason, it seems that some entries in my
99 # database produce strings which start with null byte. I suspect
100 # this to be bug in OpenIsis 0.9.0.
101 # This should fix it..
102 $index_data =~ s/^[^\w]+//;
103 $index_data = substr($index_data,0,255);
105 my $uc = uc($index_data);
106 if (! $c_table->{$field}->{$uc}) {
107 #print stderr "in index: $index_data\n";
108 $c_table->{$field}->{$uc} = $index_data;
109 $c_table->{$field}->{$uc}->{display} = $display;
110 $c_count->{$field}->{$uc} = 1;
112 $c_count->{$field}->{$uc}++;
122 my $sql = "select count(*) from $field where upper(item) like upper(?)||'%'";
124 my $sth = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr();
125 $sth->execute($where) || die "sql: $sql; ".$self->{dbh}->errstr();
127 my ($total) = $sth->fetchrow_array();
129 # no results, count all
131 my $sql = "select count(*) from $field";
133 my $sth = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr();
134 $sth->execute() || die "sql: $sql; ".$self->{dbh}->errstr();
135 $total = $sth->fetchrow_array();
149 my $from_ord = shift || 0;
150 my $rows = shift || 10;
154 my $sql = "select item,display,ord from $field";
157 my $sql2 = "select ord from $field where upper(item) like upper(?)||'%'";
158 my $sth = $self->{dbh}->prepare($sql2) || die "sql2: $sql2; ".$self->{dbh}->errstr();
160 $sth->execute($where) || die "sql2: $sql2; ".$self->{dbh}->errstr();
161 if (my $row = $sth->fetchrow_hashref) {
162 $from_ord += $row->{ord} - 1;
164 # if no match is found when searching from beginning
165 # of word in index, try substring match anywhere
166 $sql2 = "select ord from $field where upper(item) like '% '||upper(?)||'%'";
167 $sth = $self->{dbh}->prepare($sql2) || die "sql2: $sql2; ".$self->{dbh}->errstr();
168 $sth->execute($where) || die "sql2: $sql2; ".$self->{dbh}->errstr();
169 if (my $row = $sth->fetchrow_hashref) {
170 $from_ord += $row->{ord} - 1;
174 $sql .= " order by ord limit $rows offset $from_ord";
176 my $sth = $self->{dbh}->prepare($sql) || die "prepare: $sql; ".$self->{dbh}->errstr();
177 $sth->execute() || die "execute: $sql; ".$self->{dbh}->errstr();
179 while (my $row = $sth->fetchrow_hashref) {
180 $row->{item} = HTML::Entities::encode($row->{item},' <>&"');
181 $row->{display} = HTML::Entities::encode($row->{display},'<>&"');
190 return if (! $self->{dbh});
192 foreach my $table (keys %Table) {
193 $self->bench("Crating table $table");
194 $self->delete_and_create($table);
196 $self->{dbh}->begin_work || die $self->{dbh}->errstr();
198 $self->bench("Sorting ".$Table{$table}." items in $table");
199 my @keys = sort keys %{$c_table->{$table}};
201 $self->bench("Dumping data into $table");
202 my $sql = "insert into $table (ord,item,display,count) values (?,?,?,?)";
203 my $sth = $self->{dbh}->prepare($sql) || die "sql: $sql; ".$self->{dbh}->errstr();
206 foreach my $key (@keys) {
207 $sth->execute(++$ord,
208 $c_table->{$table}->{$key},
209 $c_table->{$table}->{$key}->{display},
210 $c_count->{$table}->{$key}
214 $self->{dbh}->commit || die $self->{dbh}->errstr();
217 if ($self->{dbd} =~ m/(Pg|SQLite)/) {
218 $self->{dbh}->do(qq{vacuum}) || warn "vacumming failed. It shouldn't if you are using PostgreSQL or SQLite: ".$self->{dbh}->errstr();
221 $self->bench("disconnecting from database");
223 $self->{dbh}->disconnect;
229 print STDERR "index_DBI fatal error: \$index->close() not called... $Count references left!\n" if ($Count > 0);
231 # print STDERR "usage\ttable\n";
232 # foreach (keys %Table) {
233 # print STDERR $Table{$_},"\t$_\n";