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erix's scratchpad

by erix (Vicar)
on Oct 15, 2004 at 21:01 UTC ( #399662=scratchpad: print w/ replies, xml ) Need Help??

Trying to load dblp.org

http://dblp.uni-trier.de/xml/dblp.xml.gz

# Problem was: I want no '&auml' in the database (which is a utf8 data +base). # Solution was HTML::Entities qw/decode_entities/; #!/bin/sh time zcat ~/dl/dblp.uni-trier.de/xml/dblp.xml.gz \ | perl -MEncode -MHTML::Entities -ne ' if( m/^<title>([^\n]*)<.title>/ ) { my $title = $1; $title =~ s{\\}{}g; next if ($title eq "Home Page" || $title eq "Editorial." || $title eq "Preface." || $title eq "Introduction." || $title eq "Foreword." || $title eq "Guest Editorial." || $title eq "Book Reviews." ); print encode("UTF8", (decode_entities($title) . "\n" ), Encode +::FB_CROAK); }' \ | psql -c " drop table if exists dblp; create table dblp (title text); copy dblp from stdin; " ; echo "select count(*) from dblp " | psql ; echo "select * from dblp where position ('&' in title) > 0 limit 40" + | psql ;
---------------------------------------------------- -- data of the OP: select * from (values(1,'A'),(2,'A'),(3,'A'),(3,'B'),(4,'B')) as f(id, + type); select * from ( select id , sum(case type when 'A' then 1 else 0 end) as a_count , sum(case type when 'B' then 1 else 0 end) as b_count from (values(1,'A'),(2,'A'),(3,'A'),(3,'B'),(4,'B')) as f1(id, ty +pe) -- your_table group by 1 ) as f2 where a_count > 0 and b_count > 0; ----------------------------------------------------


Can you color Ratty? ___ / \\ ______ \ // / \/ o \ ________/ \ \_ \__\ \-----o \____|\__|
-- -- Windows dev Install: -- Installing postgres on windows as a unpriviledged user (avoiding the n +ecessity of administrator rights): -- download zip file; http://www.enterprisedb.com/products-services-training/pgbindownload "Binaries from installer version 9.3.0" -- unzip the pgsql directory somewhere, and cd into it: cd pgsql -- run initdb: bin\initdb -D 9.3\data -- to start postgres: "bin\pg_ctl" -D "9.3/data" -l logfile start -- to stop: close all connections, and then run: "bin\pg_ctl" -D "9.3/data" -l logfile stop default port will be: 5432 (Install DBI + DBD::Pg to connect via perl ) I ran this on a rather old win2k, but it will probably also work on ne +wer windows. (tweak the slashes a bit and it will work on linux too (with the prope +r file download, of course)) perl -MDBI -Mstrict -e 'my$dbh=DBI->connect("dbi:Pg:port=5432;db=postg +res;", undef, undef,{RaiseError=>1}); print $dbh, "\n"'; output: DBI::db=HASH(0x1b5a808) -> apparently the connection succeeded
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