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#!/usr/bin/perl -w |
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|
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use strict; |
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use Search::Estraier 0.07; |
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use DBI; |
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use Data::Dumper; |
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use Encode qw/from_to/; |
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use Time::HiRes qw/time/; |
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use Getopt::Long; |
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|
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=head1 NAME |
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|
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pgest-index.pl - create full-text index of some columns in your database |
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|
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=cut |
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|
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my $c = { |
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debug => 0, |
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}; |
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|
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=head1 SYNOPSIS |
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|
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pgest-index.pl --create movies --sql "select id,title,year from movies" |
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|
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pgsql-index.pl --drop movies |
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|
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Options: |
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|
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=over 4 |
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|
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=item --create name |
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|
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Create index C<name> and create triggers on table with same name |
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|
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=item --drop name |
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|
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Remove triggers from table C<name> and node with same name |
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|
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=item --node-url http://localhost:1978/node/name |
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|
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Full URI to node. If it's not specified, it's assumed that you are using |
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Hyper Estraier on C<http://localhost:1978/>. |
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|
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=item --sql "select col1,col2 from name" |
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|
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SQL query which will return names of columns which are included in full-text |
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index. Have in mind that you can't use aliases (as I<something>) in this SQL |
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query (or triggers will be created with wrong fields). |
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|
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If SQL query isn't specified, default one C<< select * from movies >> will |
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be created. That will be B<serious performance hit> if all columns are |
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not needed for search. |
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|
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=item --pk id |
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|
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Specify name of primary key column in SQL query. If you allready have primary |
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key on table or unique index and it consists of simgle column |
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(compaund keys are not supported) it will be picked up automatically. |
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|
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If you specify value which is not unique, you will get just last occurence |
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of that item in index (which might be what you want). That's because specified |
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C<pk> column will be used for C<@uri> in Hyper Estraier. |
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|
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=item --user login |
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|
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=item --passwd password |
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|
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Username and password to use when connecting to Hyper Estraier. If not specified, |
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C<admin> and C<admin> will be used. |
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|
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=item --debug |
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|
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Dump debugging output. It may be specified multiple times for more verbose |
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debugging. |
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|
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=back |
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|
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=cut |
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|
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my $usage = "$0 database_name (--create|--drop) name [--sql='select id,foo,bar from table'] [--pk=id]\n"; |
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GetOptions($c, qw/create=s drop=s node_url=s sql=s pk=s user=s passwd=s debug+/); |
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|
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my $dbname = shift @ARGV || die $usage; |
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|
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$c->{dbi} = 'Pg:dbname=' . $dbname; |
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warn "# c: ", Dumper($c) if ($c->{debug}); |
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|
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my $table = $c->{create} || $c->{drop} || die $usage; |
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|
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$c->{node_url} = 'http://localhost:1978/node/' . $table; |
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|
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$c->{user} ||= 'admin'; |
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$c->{passwd} ||= 'admin'; |
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|
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# create and configure node |
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my $node = new Search::Estraier::Node( |
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url => $c->{node_url}, |
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user => $c->{user}, |
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passwd => $c->{passwd}, |
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croak_on_error => 1, |
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create => 1, |
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debug => $c->{debug} >= 4 ? 1 : 0, |
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); |
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|
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# create DBI connection |
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my $dbh = DBI->connect("DBI:$c->{dbi}","","") || die $DBI::errstr; |
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|
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# drop existing triggers |
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sub drop_triggers { |
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my $table = shift || die "no table?"; |
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|
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my $sth = $dbh->prepare(qq{ |
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SELECT relname,tgname |
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FROM pg_trigger JOIN pg_class ON relfilenode = tgrelid |
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WHERE tgname LIKE 'pgest_trigger_%' AND relname = ? |
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}) || $dbh->errstr; |
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|
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$sth->execute( $table ) || $sth->errstr(); |
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warn "there are ", $sth->rows, " triggers instead of just 3, dropping all\n" if ($sth->rows != 3); |
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|
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while (my $row = $sth->fetchrow_hashref) { |
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my $sql = sprintf(qq{ DROP TRIGGER %s ON %s }, $row->{tgname}, $row->{relname} ); |
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#warn "# $sql\n"; |
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$dbh->do( $sql ) || $dbh->errstr; |
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} |
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|
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warn "removed ", $sth->rows, " triggers from $table\n" if ($sth->rows); |
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|
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} |
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|
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if ($c->{drop}) { |
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drop_triggers( $table ); |
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warn "removing node $table\n"; |
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$node->master( |
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action => 'nodedel', |
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name => $table, |
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); |
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exit; |
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} |
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|
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# clear existing node |
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$node->master( |
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action => 'nodeclr', |
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name => $table, |
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); |
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|
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# create PostgreSQL functions |
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$dbh->do(qq{ |
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|
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CREATE OR REPLACE FUNCTION pgest(text, text, text, int, text, text, text, int, int, text[]) |
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RETURNS setof record |
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AS 'pgest','pgest_node' |
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LANGUAGE 'C' IMMUTABLE CALLED ON NULL INPUT; |
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|
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CREATE OR REPLACE FUNCTION pgest_trigger() RETURNS TRIGGER |
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AS 'pgest', 'pgest_trigger' |
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LANGUAGE 'C' STRICT; |
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|
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}) || die $dbh->errstr(); |
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|
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drop_triggers( $table ); |
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|
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if (! $c->{pk}) { |
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warn "# finding primary key for $table\n" if ($c->{debug}); |
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|
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my $index_fmt = qq{ |
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SELECT |
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a.attname, t.typname |
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FROM pg_type t, pg_attribute a |
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WHERE t.oid = a.atttypid AND attrelid = ( |
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SELECT indexrelid |
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FROM pg_class c, pg_index i |
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WHERE c.relname = '%s' |
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AND c.oid = i.indrelid |
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AND %s |
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AND indnatts = 1 |
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) |
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}; |
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|
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$c->{pk} = $dbh->selectrow_array( sprintf($index_fmt, $table, 'indisprimary') ); |
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|
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$c->{pk} ||= $dbh->selectrow_array( sprintf($index_fmt, $table, 'indisunique') ); |
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|
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} |
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die "$0: can't find single column primary key for table ${table}. Please specify column with --pk\n" unless ($c->{pk}); |
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warn "using primary key $c->{pk}\n"; |
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$dbh->begin_work; |
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$c->{sql} ||= "select * from $table"; |
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my $sth = $dbh->prepare($c->{sql}) || die $dbh->errstr(); |
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$sth->execute() || die $sth->errstr; |
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my @cols = @{ $sth->{NAME} }; |
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die "SQL '$c->{sql}' didn't include primary key $c->{pk}\n" unless grep(/^\Q$c->{pk}\E$/, @cols); |
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warn "# columns: ",join(",", @cols),"\n" if ($c->{debug}); |
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my $total = $sth->rows; |
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my $i = 1; |
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my $t = time(); |
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my $pk = $c->{pk} || 'id'; |
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warn "indexing existing ",$sth->rows," rows\n"; |
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while (my $row = $sth->fetchrow_hashref() ) { |
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warn "# row: ",Dumper($row) if ($c->{debug} >= 3); |
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|
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# create document |
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my $doc = new Search::Estraier::Document; |
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|
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if (my $id = $row->{$pk}) { |
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$doc->add_attr('@uri', $id); |
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} else { |
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die "can't find pk column '$pk' in results\n"; |
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} |
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my $log = sprintf "%4d ",$i; |
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while (my ($col,$val) = each %{$row}) { |
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if ($val) { |
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# add attributes (make column usable from attribute search) |
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$doc->add_attr($col, $val); |
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|
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# add body text to document (make it searchable using full-text index) |
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$doc->add_text($val); |
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$log .= "R"; |
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} else { |
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$log .= "."; |
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} |
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|
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} |
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warn "# doc draft: ",$doc->dump_draft, "\n" if ($c->{debug} >= 2); |
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die "error: ", $node->status,"\n" unless (eval { $node->put_doc($doc) }); |
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$log .= sprintf(" %d%% %.1f/s\r", int(( $i++ / $total) * 100), ( $i / (time() - $t) ) ); |
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print STDERR $log; |
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|
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} |
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|
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my $cols = "'" . join("', '", @cols) . "'"; |
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|
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foreach my $t (qw/UPDATE INSERT DELETE/) { |
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my $lc_t = lc($t); |
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|
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my $sql = qq{ |
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|
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CREATE TRIGGER pgest_trigger_${lc_t} AFTER ${t} |
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ON ${table} FOR EACH ROW |
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EXECUTE PROCEDURE pgest_trigger('$c->{node_url}','$c->{user}','$c->{passwd}', |
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'$c->{pk}', $cols |
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) |
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|
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}; |
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#warn "$sql\n"; |
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$dbh->do( $sql ) || die $dbh->errstr; |
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|
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} |
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warn "created consistency triggers\n"; |
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$dbh->commit; |
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|
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=head1 SEARCHING |
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|
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At end of each run, this script will output example search SQL query on STDOUT. |
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You can use it to quickly construct queries for your application. |
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|
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=cut |
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|
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my $col_names = join(', ', @cols); |
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my $col_def = join(', ', map { "$_ text" } @cols); |
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|
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print " |
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-- example SQL search query: |
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|
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SELECT $col_names |
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FROM pgest( |
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-- node, login, passwd, depth |
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'$c->{node_url}', '$c->{user}', '$c->{passwd}', 0, |
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-- full text search |
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'foo bar', |
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-- attribute filter, order, limit, offset |
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null, null, null, null, |
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-- return columns |
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array[$cols] |
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) as ($col_def); |
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|
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"; |
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|
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__END__ |
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|
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=head1 AUTHOR |
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|
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Dobrica Pavlinusic <dpavlin@rot13.org> |
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|
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L<http://www.rot13.org/~dpavlin/> |
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|
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=head1 LICENSE |
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|
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This product is licensed under GNU Public License (GPL) v2 or later. |
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|
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=cut |
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