package index_DBI;
use strict qw(vars);
use vars qw($Count);
+use HTML::Entities;
use DBI;
my %Table; # index tables which where visited in this run
+my %sth_cache; # cache prepared statements
sub new {
my $class = shift;
my $self = {};
bless($self, $class);
- # FIX: config params
- $self->{dbh} = DBI->connect("DBI:Pg:dbname=webpac","dpavlin","") || die $DBI::errstr;
+ my $dbd = shift || die "need dbi_dbd= in [global] section of configuration file";
+ my $dsn = shift || die "need dbi_dsn= in [global] section of configuration file";
+ my $user = shift || die "need dbi_user= in [global] section of configuration file";
+ my $passwd = shift || die "need dbi_passwd= in [global] section of configuration file";
+
+ $self->{dbh} = DBI->connect("DBI:$dbd:$dsn",$user,$passwd) || die $DBI::errstr;
# begin transaction
$self->{dbh}->begin_work || die $self->{dbh}->errstr();
my $field = shift;
+#print "#### delete_and_create($field)\n";
+
$self->{dbh}->commit;
- $self->{dbh}->begin_work;
my $sql = "select count(*) from $field";
my $sth = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr();
# FIX: this is not a good way to check if table exists!
- if (1 || $sth->execute() && $sth->fetchrow_hashref) {
+ if ($sth->execute() && $sth->fetchrow_hashref) {
my $sql = "drop table $field";
-# my $sth = $self->{dbh}->do($sql) || die "SQL: $sql ".$self->{dbh}->errstr();
+ $self->{dbh}->begin_work;
+ my $sth = $self->{dbh}->do($sql) || die "SQL: $sql ".$self->{dbh}->errstr();
+ $self->{dbh}->commit;
}
$sql = "create table $field (
item varchar(255),
ident varchar(255),
count int,
+ ord int,
primary key (item,ident)
)";
-# $sth = $self->{dbh}->do($sql) || die "SQL: $sql ".$self->{dbh}->errstr();
- $sth = $self->{dbh}->do($sql) || warn "SQL: $sql ".$self->{dbh}->errstr();
+ $self->{dbh}->begin_work;
+ $sth = $self->{dbh}->do($sql); # || warn "SQL: $sql ".$self->{dbh}->errstr();
$self->{dbh}->commit;
+
$self->{dbh}->begin_work;
}
my $self = shift;
my $field = shift;
- my $index_data = shift;
- my $ident = shift; # e.g. library id
+ my $index_data = shift || print STDERR "\$index->insert($field,NULL,...)";
+ my $ident = shift || ''; # e.g. library id
if (! $index_data) {
print STDERR "\$index->insert() -- no value to insert\n";
if (! $Table{$field}) {
$self->delete_and_create($field);
+
+ my $sql = "select item from $field where upper(item)=upper(?)";
+ $sth_cache{$field."select"} = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr();
+
+ $sql = "insert into $field (item,ident,count) values (?,?,?)";
+ $sth_cache{$field."insert"} = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr();
+
+ $sql = "update $field set count = count + 1 where item = ? and ident = ?";
+ $sth_cache{$field."update"} = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr();
}
$Table{$field}++;
- my $sql = "select item from $field where upper(item)=upper(?)";
- my $sth = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr();
- $sth->execute($index_data) || die "sql: $sql; ".$self->{dbh}->errstr();
- if (! $sth->fetchrow_hashref) {
- my $sql = "insert into $field (item,ident,count) values (?,?,?)";
- my $sth = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr();
- $sth->execute($index_data,$ident,1) || die "sql: $sql; ".$self->{dbh}->errstr();
+ $sth_cache{$field."select"}->execute($index_data) || die "cache: $field select; ".$self->{dbh}->errstr();
+ if (! $sth_cache{$field."select"}->fetchrow_hashref) {
+ $index_data = substr($index_data,0,255);
+ $sth_cache{$field."insert"}->execute($index_data,$ident,1) || die "cache: $field insert; ".$self->{dbh}->errstr();
#print stderr "in index: $index_data\n";
} else {
- my $sql = "update $field set count = count + 1 where item = ? and ident = ?";
- my $sth = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr();
- $sth->execute($index_data,$ident) || die "sql: $sql; ".$self->{dbh}->errstr();
+ $sth_cache{$field."update"}->execute($index_data,$ident) || die "cache: $field update; ".$self->{dbh}->errstr();
}
}
my $field = shift;
my $sql = "select count(*) from $field";
- return $self->{dbh}->do($sql);
+
+ my $sth = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr();
+ $sth->execute() || die "sql: $sql; ".$self->{dbh}->errstr();
+
+ my ($total) = $sth->fetchrow_array();
+
+ return $total;
}
my $what = shift || 'item'; # 'item,ident'
my $where = shift;
+ my $from_ord = shift || 0;
+ my $rows = shift || 10;
+
my @sql_args;
- my $sql = "select $what from $field";
+ my $sql = "select $what,ord from $field";
+
if ($where) {
- $sql .= " where upper(item) like upper(?)||'%'";
- push @sql_args,$where;
+ my $sql2 = " select ord from $field where upper($what) like upper(?)||'%'";
+ my $sth = $self->{dbh}->prepare($sql2) || die "sql2: $sql2; ".$self->{dbh}->errstr();
+
+ $sth->execute($where) || die "sql2: $sql2; ".$self->{dbh}->errstr();
+ if (my $row = $sth->fetchrow_hashref) {
+ $from_ord += $row->{ord} - 1;
+ }
}
- $sql .= " order by item";
+ $sql .= " order by ord limit $rows offset $from_ord";
- my $sth = $self->{dbh}->prepare($sql) || die "sql: $sql; ".$self->{dbh}->errstr();
- $sth->execute(@sql_args) || die "sql: $sql; ".$self->{dbh}->errstr();
+ my $sth = $self->{dbh}->prepare($sql) || die "prepare: $sql; ".$self->{dbh}->errstr();
+ $sth->execute() || die "execute: $sql; ".$self->{dbh}->errstr();
my @arr;
while (my $row = $sth->fetchrow_hashref) {
+ $row->{item} = HTML::Entities::encode($row->{item},'<>&"');
push @arr,$row;
}
return @arr;
sub close {
my $self = shift;
+
+ # re-create ord column (sorted order) in table
+ sub create_ord {
+
+ my $table = shift;
+
+ $self->{dbh}->begin_work || die $self->{dbh}->errstr();
+
+ my $sql = "select oid from $table order by upper(item)";
+ my $sth = $self->{dbh}->prepare($sql) || die "sql: $sql; ".$self->{dbh}->errstr();
+ $sql = "update $table set ord=? where oid=?";
+ my $sth_update = $self->{dbh}->prepare($sql) || die "sql: $sql; ".$self->{dbh}->errstr();
+ $sth->execute() || die "sql: $sql; ".$self->{dbh}->errstr();
+ my $ord = 1;
+ while (my $row = $sth->fetchrow_hashref) {
+ $sth_update->execute($ord++,$row->{oid});
+ }
+
+ $self->{dbh}->commit || die $self->{dbh}->errstr();
+ }
+ #--- end of sub
+
if ($self->{dbh}) {
+
+ # commit
$self->{dbh}->commit || die $self->{dbh}->errstr();
+
+ foreach my $table (keys %Table) {
+# FIX
+print STDERR "creating ord for $table...\n";
+ create_ord($table);
+ undef $sth_cache{$table."select"};
+ undef $sth_cache{$table."insert"};
+ undef $sth_cache{$table."update"};
+ }
+
$self->{dbh}->disconnect;
undef $self->{dbh};
}
projects / webpac / blobdiff