2 # this file implements index functions using DBI
12 my %Table; # index tables which where visited in this run
20 $self->{dbh} = DBI->connect("DBI:Pg:dbname=webpac","dpavlin","") || die $DBI::errstr;
22 $self->{dbh}->begin_work || die $self->{dbh}->errstr();
29 sub delete_and_create {
35 $self->{dbh}->begin_work;
37 my $sql = "select count(*) from $field";
38 my $sth = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr();
39 # FIX: this is not a good way to check if table exists!
40 if ($sth->execute() && $sth->fetchrow_hashref) {
41 my $sql = "drop table $field";
42 my $sth = $self->{dbh}->do($sql) || die "SQL: $sql ".$self->{dbh}->errstr();
44 $sql = "create table $field (
49 primary key (item,ident)
51 $sth = $self->{dbh}->do($sql); # || warn "SQL: $sql ".$self->{dbh}->errstr();
54 $self->{dbh}->begin_work;
61 my $index_data = shift || print STDERR "\$index->insert($field,NULL,...)";
62 my $ident = shift || ''; # e.g. library id
65 print STDERR "\$index->insert() -- no value to insert\n";
69 if (! $Table{$field}) {
70 $self->delete_and_create($field);
74 my $sql = "select item from $field where upper(item)=upper(?)";
75 my $sth = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr();
76 $sth->execute($index_data) || die "sql: $sql; ".$self->{dbh}->errstr();
77 if (! $sth->fetchrow_hashref) {
78 my $sql = "insert into $field (item,ident,count) values (?,?,?)";
79 my $sth = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr();
80 $sth->execute($index_data,$ident,1) || die "sql: $sql; ".$self->{dbh}->errstr();
81 #print stderr "in index: $index_data\n";
83 my $sql = "update $field set count = count + 1 where item = ? and ident = ?";
84 my $sth = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr();
85 $sth->execute($index_data,$ident) || die "sql: $sql; ".$self->{dbh}->errstr();
94 my $sql = "select count(*) from $field";
96 my $sth = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr();
97 $sth->execute() || die "sql: $sql; ".$self->{dbh}->errstr();
99 my ($total) = $sth->fetchrow_array();
109 my $what = shift || 'item'; # 'item,ident'
112 my $from_ord = shift || 0;
113 my $rows = shift || 10;
117 my $sql = "select $what,ord from $field";
120 my $sql2 = " select ord from $field where upper($what) like upper(?)||'%'";
121 my $sth = $self->{dbh}->prepare($sql2) || die "sql2: $sql2; ".$self->{dbh}->errstr();
123 $sth->execute($where) || die "sql2: $sql2; ".$self->{dbh}->errstr();
124 if (my $row = $sth->fetchrow_hashref) {
125 $from_ord += $row->{ord} - 1;
128 $sql .= " order by ord limit $rows offset $from_ord";
130 my $sth = $self->{dbh}->prepare($sql) || die "prepare: $sql; ".$self->{dbh}->errstr();
131 $sth->execute() || die "execute: $sql; ".$self->{dbh}->errstr();
133 while (my $row = $sth->fetchrow_hashref) {
134 $row->{item} = HTML::Entities::encode($row->{item});
144 # re-create ord column (sorted order) in table
149 $self->{dbh}->begin_work || die $self->{dbh}->errstr();
151 my $sql = "select oid from $table order by item";
152 my $sth = $self->{dbh}->prepare($sql) || die "sql: $sql; ".$self->{dbh}->errstr();
153 $sql = "update $table set ord=? where oid=?";
154 my $sth_update = $self->{dbh}->prepare($sql) || die "sql: $sql; ".$self->{dbh}->errstr();
155 $sth->execute() || die "sql: $sql; ".$self->{dbh}->errstr();
157 while (my $row = $sth->fetchrow_hashref) {
158 $sth_update->execute($ord++,$row->{oid});
161 $self->{dbh}->commit || die $self->{dbh}->errstr();
168 $self->{dbh}->commit || die $self->{dbh}->errstr();
170 foreach my $table (keys %Table) {
172 print STDERR "creating ord for $table...\n";
176 $self->{dbh}->disconnect;
183 print STDERR "index_DBI fatal error: \$index->close() not called... $Count references left!\n" if ($Count > 0);
185 # print STDERR "usage\ttable\n";
186 # foreach (keys %Table) {
187 # print STDERR $Table{$_},"\t$_\n";