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";
47 $self->{dbh} = DBI->connect("DBI:$dbd:$dsn",$user,$passwd) || die $DBI::errstr;
50 $self->bench("connected to $dbd as $user");
55 sub delete_and_create {
60 #print "#### delete_and_create($field)\n";
62 my $sql = "select count(*) from $field";
63 my $sth = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr();
64 # FIX: this is not a good way to check if table exists!
65 if ($sth->execute() && $sth->fetchrow_hashref) {
66 my $sql = "drop table $field";
67 my $sth = $self->{dbh}->do($sql) || die "SQL: $sql ".$self->{dbh}->errstr();
69 $sql = "create table $field (
77 $sth = $self->{dbh}->do($sql) || warn "SQL: $sql ".$self->{dbh}->errstr();
84 my $index_data = shift || print STDERR "\$index->insert($field,NULL,...)";
85 my $display = shift || $index_data;
88 print STDERR "\$index->insert() -- no value to insert\n";
94 #$sth_cache{$field."select"}->execute($index_data) || die "cache: $field select; ".$self->{dbh}->errstr();
96 # XXX for some strange reason, it seems that some entries in my
97 # database produce strings which start with null byte. I suspect
98 # this to be bug in OpenIsis 0.9.0.
99 # This should fix it..
100 $index_data =~ s/^[^\w]+//;
101 $index_data = substr($index_data,0,255);
103 my $uc = uc($index_data);
104 if (! $c_table->{$field}->{$uc}) {
105 #print stderr "in index: $index_data\n";
106 $c_table->{$field}->{$uc} = $index_data;
107 $c_table->{$field}->{$uc}->{display} = $display;
108 $c_count->{$field}->{$uc} = 1;
110 $c_count->{$field}->{$uc}++;
120 my $sql = "select count(*) from $field where upper(item) like upper(?)||'%'";
122 my $sth = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr();
123 $sth->execute($where) || die "sql: $sql; ".$self->{dbh}->errstr();
125 my ($total) = $sth->fetchrow_array();
127 # no results, count all
129 my $sql = "select count(*) from $field";
131 my $sth = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr();
132 $sth->execute() || die "sql: $sql; ".$self->{dbh}->errstr();
133 $total = $sth->fetchrow_array();
147 my $from_ord = shift || 0;
148 my $rows = shift || 10;
152 my $sql = "select item,display,ord from $field";
155 my $sql2 = "select ord from $field where upper(item) like upper(?)||'%'";
156 my $sth = $self->{dbh}->prepare($sql2) || die "sql2: $sql2; ".$self->{dbh}->errstr();
158 $sth->execute($where) || die "sql2: $sql2; ".$self->{dbh}->errstr();
159 if (my $row = $sth->fetchrow_hashref) {
160 $from_ord += $row->{ord} - 1;
162 # if no match is found when searching from beginning
163 # of word in index, try substring match anywhere
164 $sql2 = "select ord from $field where upper(item) like '%'||upper(?)||'%'";
165 $sth = $self->{dbh}->prepare($sql2) || die "sql2: $sql2; ".$self->{dbh}->errstr();
166 $sth->execute($where) || die "sql2: $sql2; ".$self->{dbh}->errstr();
167 if (my $row = $sth->fetchrow_hashref) {
168 $from_ord += $row->{ord} - 1;
172 $sql .= " order by ord limit $rows offset $from_ord";
174 my $sth = $self->{dbh}->prepare($sql) || die "prepare: $sql; ".$self->{dbh}->errstr();
175 $sth->execute() || die "execute: $sql; ".$self->{dbh}->errstr();
177 while (my $row = $sth->fetchrow_hashref) {
178 $row->{item} = HTML::Entities::encode($row->{item},' <>&"');
179 $row->{display} = HTML::Entities::encode($row->{display},'<>&"');
188 return if (! $self->{dbh});
190 foreach my $table (keys %Table) {
191 $self->bench("Crating table $table");
192 $self->delete_and_create($table);
194 $self->{dbh}->begin_work || die $self->{dbh}->errstr();
196 $self->bench("Sorting ".$Table{$table}." items in $table");
197 my @keys = sort keys %{$c_table->{$table}};
199 $self->bench("Dumping data into $table");
200 my $sql = "insert into $table (ord,item,display,count) values (?,?,?,?)";
201 my $sth = $self->{dbh}->prepare($sql) || die "sql: $sql; ".$self->{dbh}->errstr();
204 foreach my $key (@keys) {
205 $sth->execute(++$ord,
206 $c_table->{$table}->{$key},
207 $c_table->{$table}->{$key}->{display},
208 $c_count->{$table}->{$key}
212 $self->{dbh}->commit || die $self->{dbh}->errstr();
214 $self->bench("disconnecting from database");
216 $self->{dbh}->disconnect;
222 print STDERR "index_DBI fatal error: \$index->close() not called... $Count references left!\n" if ($Count > 0);
224 # print STDERR "usage\ttable\n";
225 # foreach (keys %Table) {
226 # print STDERR $Table{$_},"\t$_\n";