# this file implements index functions using DBI
# and huge amounts of memory for cache speedup
#
+# this version doesn't support ident (which sould be location in
+# library). But, that functionality is not used anyway...
+#
package index_DBI;
use strict qw(vars);
my $c_table;
my $c_count;
+# bench time
+my $bench_time = time();
+
+sub bench {
+ my $self = shift;
+ my $msg = shift;
+
+ print STDERR "last operation took ",time()-$bench_time," seconds...\n";
+ $bench_time=time();
+ print STDERR "$msg\n";
+}
+
sub new {
my $class = shift;
my $self = {};
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();
-
$Count++;
+ $self->bench("connected to $dbd as $user");
+
return $self;
}
#print "#### delete_and_create($field)\n";
- $self->{dbh}->commit;
-
my $sql = "select count(*) from $field";
my $sth = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr();
# FIX: this is not a good way to check if table exists!
if ($sth->execute() && $sth->fetchrow_hashref) {
my $sql = "drop table $field";
- $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)
+ primary key (item)
)";
- $self->{dbh}->begin_work;
- $sth = $self->{dbh}->do($sql); # || warn "SQL: $sql ".$self->{dbh}->errstr();
- $self->{dbh}->commit;
-
- $self->{dbh}->begin_work;
+ $sth = $self->{dbh}->do($sql) || warn "SQL: $sql ".$self->{dbh}->errstr();
}
sub insert {
return;
}
- 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}++;
#$sth_cache{$field."select"}->execute($index_data) || die "cache: $field select; ".$self->{dbh}->errstr();
+
+ # XXX for some strange reason, it seems that some entries in my
+ # database produce strings which start with null byte. I suspect
+ # this to be bug in OpenIsis 0.9.0.
+ # This should fix it..
+ $index_data =~ s/^[^\w]+//;
$index_data = substr($index_data,0,255);
+
my $uc = uc($index_data);
- if (! $c_table->{$field}->{$ident}->{$uc}) {
- $sth_cache{$field."insert"}->execute($index_data,$ident,0) || warn "cache: $field insert ($index_data,$ident); ".$self->{dbh}->errstr();
+ if (! $c_table->{$field}->{$uc}) {
#print stderr "in index: $index_data\n";
- $c_table->{$field}->{$ident}->{$uc} = $index_data;
- $c_count->{$field}->{$ident}->{$uc} = 1;
+ $c_table->{$field}->{$uc} = $index_data;
+ $c_count->{$field}->{$uc} = 1;
} else {
- $c_count->{$field}->{$ident}->{$uc}++;
+ $c_count->{$field}->{$uc}++;
}
}
-sub check {
+sub count {
my $self = shift;
my $field = shift;
+ my $where = shift;
- my $sql = "select count(*) from $field";
+ my $sql = "select count(*) from $field where upper(item) like upper(?)||'%'";
my $sth = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr();
- $sth->execute() || die "sql: $sql; ".$self->{dbh}->errstr();
+ $sth->execute($where) || die "sql: $sql; ".$self->{dbh}->errstr();
my ($total) = $sth->fetchrow_array();
- return $total;
+ # no results, count all
+ if (! $total) {
+ my $sql = "select count(*) from $field";
+
+ my $sth = $self->{dbh}->prepare($sql) || die $self->{dbh}->errstr();
+ $sth->execute() || die "sql: $sql; ".$self->{dbh}->errstr();
+ $total = $sth->fetchrow_array();
+
+ }
+
+ return $total || 1;
}
my $self = shift;
my $field = shift;
- my $what = shift || 'item'; # 'item,ident'
my $where = shift;
my $from_ord = shift || 0;
my @sql_args;
- my $sql = "select $what,ord from $field";
+ my $sql = "select item,ord from $field";
if ($where) {
- my $sql2 = " select ord from $field where upper($what) like upper(?)||'%'";
+ my $sql2 = "select ord from $field where upper(item) 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;
+ } else {
+ # if no match is found when searching from beginning
+ # of word in index, try substring match anywhere
+ $sql2 = "select ord from $field where upper(item) like '%'||upper(?)||'%'";
+ $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 ord limit $rows offset $from_ord";
sub close {
my $self = shift;
+ return if (! $self->{dbh});
- # re-create ord column (sorted order) in table
- sub create_ord {
-
- my $table = shift;
+ foreach my $table (keys %Table) {
+ $self->bench("Crating table $table");
+ $self->delete_and_create($table);
$self->{dbh}->begin_work || die $self->{dbh}->errstr();
- my $sql = "select oid from $table order by upper(item)";
+ $self->bench("Sorting ".$Table{$table}." items in $table");
+ my @keys = sort keys %{$c_table->{$table}};
+
+ $self->bench("Dumping data into $table");
+ my $sql = "insert into $table (ord,item,count) values (?,?,?)";
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});
+
+ my $ord = 0;
+ foreach my $key (@keys) {
+ $sth->execute(++$ord,
+ $c_table->{$table}->{$key},
+ $c_count->{$table}->{$key}
+ );
}
$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"};
-# XXX
-# $sth_cache{$field."update"}->execute($index_data,$ident) || die "cache: $field update; ".$self->{dbh}->errstr();
- }
+ $self->bench("disconnecting from database");
- $self->{dbh}->disconnect;
- undef $self->{dbh};
- }
+ $self->{dbh}->disconnect;
+ undef $self->{dbh};
}
END {
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