Fixed mutex problem in TRUNCATE TABLE

Docs/manual.texi:
  Changelog
sql/mysqld.cc:
  Portability fix

1 files changed, 125 insertions, 0 deletions

diff --git a/tests/truncate.pl b/tests/truncate.pl
new file mode 100755
index 00000000000..57b50cf96b6
--- /dev/null
+++ b/tests/truncate.pl
@@ -0,0 +1,125 @@
+#!/usr/bin/perl -w
+#
+# This is a test with uses many processes to test a MySQL server.
+#
+
+$opt_loop_count=10000; # Change this to make test harder/easier
+
+##################### Standard benchmark inits ##############################
+
+use DBI;
+use Getopt::Long;
+use Benchmark;
+
+package main;
+
+$opt_skip_create=$opt_skip_in=$opt_verbose=$opt_fast_insert=
+$opt_lock_tables=$opt_debug=$opt_skip_delete=$opt_fast=$opt_force=0;
+$opt_threads=2;
+$opt_host=$opt_user=$opt_password=""; $opt_db="test";
+
+GetOptions("host=s","db=s","user=s","password=s","loop-count=i","skip-create","skip-in","skip-delete","verbose","fast-insert","lock-tables","debug","fast","force","threads=i") || die "Aborted";
+$opt_verbose=$opt_debug=$opt_lock_tables=$opt_fast_insert=$opt_fast=$opt_skip_in=$opt_force=undef;  # Ignore warnings from these
+
+print "Testing truncate from $opt_threads multiple connections $opt_loop_count times\n";
+
+@testtables = ( ["bench_f31", "type=heap"]);
+
+####
+####  Start timeing and start test
+####
+
+$start_time=new Benchmark;
+$dbh = DBI->connect("DBI:mysql:$opt_db:$opt_host",
+		    $opt_user, $opt_password,
+		  { PrintError => 0}) || die $DBI::errstr;
+if (!$opt_skip_create)
+{
+  my $table_def;
+  foreach $table_def (@testtables)
+  {
+    my ($table,$extra)= ($table_def->[0], $table_def->[1]);
+    print "Creating table $table in database $opt_db\n";
+    $dbh->do("drop table if exists $table");
+    $dbh->do("create table $table".
+	     " (id int(6) not null,".
+	     " info varchar(32)," .
+	     " marker timestamp," .
+	     " flag int not null," .
+	     " primary key(id)) $extra")
+
+      or die $DBI::errstr;
+  }
+}
+
+$dbh->disconnect; $dbh=0;	# Close handler
+$|= 1;				# Autoflush
+
+####
+#### Start the tests
+####
+
+for ($i=0 ; $i < $opt_threads ; $i ++)
+{
+  test_truncate() if (($pid=fork()) == 0); $work{$pid}="truncate";
+}
+
+print "Started $opt_threads threads\n";
+
+$errors=0;
+$running_insert_threads=$opt_threads;
+while (($pid=wait()) != -1)
+{
+  $ret=$?/256;
+  print "thread '" . $work{$pid} . "' finished with exit code $ret\n";
+  --$running_insert_threads;
+  $errors++ if ($ret != 0);
+}
+
+#
+# Cleanup
+#
+
+if (!$opt_skip_delete && !$errors)
+{
+  my $table_def;
+  $dbh = DBI->connect("DBI:mysql:$opt_db:$opt_host",
+		      $opt_user, $opt_password,
+		    { PrintError => 0}) || die $DBI::errstr;
+
+  foreach $table_def (@testtables)
+  {
+    $dbh->do("drop table " . $table_def->[0]);
+  }
+  $dbh->disconnect; $dbh=0;	# Close handler
+}
+
+print ($errors ? "Test failed\n" :"Test ok\n");
+$end_time=new Benchmark;
+print "Total time: " .
+  timestr(timediff($end_time, $start_time),"noc") . "\n";
+
+exit(0);
+
+
+#
+# Insert records in the table
+#
+
+sub test_truncate
+{
+  my ($dbh,$i,$j,$count,$table_def,$table);
+
+  $dbh = DBI->connect("DBI:mysql:$opt_db:$opt_host",
+		      $opt_user, $opt_password,
+		    { PrintError => 0}) || die $DBI::errstr;
+
+  for ($count=0; $count < $opt_loop_count ; $count++)
+  {
+    my ($table)= ($testtables[0]->[0]);
+    $dbh->do("truncate table $table") || die "Got error on truncate: $DBI::errstr\n";
+  }
+  $dbh->disconnect; $dbh=0;
+  print "Test_truncate: Run $count times\n";
+  exit(0);
+}