Hi !
mysql 5.0 is _really_ cool.
this bug should be reproducable:
( cat table.sql ; ./populate.pl ; ./perfect_game.pl 32 ) | mysql test
after that executing the same procedure with same parameter again,
the connection is lost:
--
mysql call self_and_up(1);
+---+
| id|
+---+
| 1 |
| 1999 |
| 399 |
|79 |
|15 |
| 2 |
+---+
6 rows in set (0.20 sec)
Query OK, 0 rows affected (0.20 sec)
mysql call self_and_up(1);
ERROR 2013 (HY000): Lost connection to MySQL server during query
mysql
--
use cut and paste:
==
table.sql
==
-- table.sql
drop table if exists node;
create table node ( id int unsigned not null,
rid int unsigned not null,
msg text not null,
primary key(id),
unique index(rid,id)
);
--
==
populate.pl
==
#!/usr/bin/perl
# populate.pl - [EMAIL PROTECTED]
our $level = 0;
our $parent = 0;
our @nodes;
sub rec() {
for my $i (1..$lim) {
my $node = $parent*$lim+$i;
$nodes[$level] = $node;
print insert into node (id, rid, msg) values ($node, $parent, \.join(-, 0,
@nodes[0..$level]).\);\n;
{
local $parent = $node;
local $level = $level+1;
rec() if $level $rec_depth;
}
}
}
sub populate_table(@) {
my %args = @_;
{
local $lim = $args{count} || 2;
local $rec_depth = $args{depth} || 2;
rec;
}
}
populate_table count = 5, depth = 6;
--
==
perfect_game.pl
==
#!/usr/bin/perl
# perfect_game.pl - [EMAIL PROTECTED]
sub query_parents_union(@) {
my %a = @_;
my $level = $a{max_level} || 0;
my $proc = $a{proc} || dummy;
my $s = select . join(,, map( { n0.$_ } @{$a{fields}}));
my $o = drop procedure if exists $proc;\n
.delimiter |\n
.create procedure $proc (IN v INT)\n
.begin\n;
for(my $x = 0; $x = $level; $x++) {
$o .= \n($s\n\tfrom .join(, , map( { $a{table} as n$_ } (
0..$x))).\n\twhere (
.\n\t\t(
.join( and , map( { n$_.$a{id} = .(($_ = $x) ? v :
n.($_+1)..$a{rid}) } (0..$x))).)
.\n\t\t)\n);
$o .=\nunion if $x != $level;
}
$o
.;\n
.end |\n
.delimiter ;\n
}
my $limit = $ARGV[0] || 0;
print query_parents_union(table = 'node', id = 'id', rid = 'rid', fields = [
'id' ], proc = self_and_up, max_level = $limit);
--
--
ciao -
Stefan
aclocal - emit a warning if -ac kernel is used.
Stefan TrabyLinux/ia32 office: +49-721-3523165
Mathystr. 18-20 V/8 Linux/alpha cell: +XX-XXX-XXX
76133 Karlsruhe Linux/sparc http://graz03.kwc.at
Germany Linux/arm mailto:[EMAIL PROTECTED]
Europe Linux/mips mailto:[EMAIL PROTECTED]
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