Merge with 4.0.8

BitKeeper/etc/logging_ok:
  auto-union
VC++Files/sql/mysqld.dsp:
  Auto merged
acinclude.m4:
  Auto merged
include/my_base.h:
  Auto merged
include/myisam.h:
  Auto merged
include/myisammrg.h:
  Auto merged
libmysql/libmysql.c:
  Auto merged
myisam/mi_check.c:
  Auto merged
myisam/mi_write.c:
  Auto merged
myisam/myisamdef.h:
  Auto merged
mysql-test/mysql-test-run.sh:
  Auto merged
mysql-test/r/case.result:
  Auto merged
mysql-test/r/distinct.result:
  Auto merged
mysql-test/r/fulltext.result:
  Auto merged
mysql-test/r/key_diff.result:
  Auto merged
mysql-test/r/multi_update.result:
  Auto merged
mysql-test/r/order_by.result:
  Auto merged
mysql-test/r/select.result:
  Auto merged
mysql-test/r/show_check.result:
  Auto merged
mysql-test/t/multi_update.test:
  Auto merged
mysql-test/t/rpl_log_pos.test:
  Auto merged
mysys/Makefile.am:
  Auto merged
scripts/Makefile.am:
  Auto merged
sql/field.cc:
  Auto merged
sql/ha_innodb.cc:
  Auto merged
sql/ha_myisam.cc:
  Auto merged
sql/ha_myisammrg.cc:
  Auto merged
sql/ha_myisammrg.h:
  Auto merged
sql/item_cmpfunc.cc:
  Auto merged
sql/item_create.h:
  Auto merged
sql/item_func.cc:
  Auto merged
sql/item_func.h:
  Auto merged
sql/lex.h:
  Auto merged
sql/log.cc:
  Auto merged
sql/net_serv.cc:
  Auto merged
sql/repl_failsafe.cc:
  Auto merged
sql/set_var.h:
  Auto merged
sql/slave.cc:
  Auto merged
sql/slave.h:
  Auto merged
sql/sql_acl.cc:
  Auto merged
sql/sql_insert.cc:
  Auto merged
sql/sql_load.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged
sql/sql_udf.cc:
  Auto merged
sql/sql_update.cc:
  Auto merged
sql-bench/crash-me.sh:
  Auto merged
sql-bench/server-cfg.sh:
  Auto merged
sql/share/english/errmsg.txt:
  Auto merged
sql/structs.h:
  Auto merged

1 files changed, 4 insertions, 2 deletions

diff --git a/sql/field.cc b/sql/field.cc
index 9acf2e14829..f206774b456 100644
--- a/sql/field.cc
+++ b/sql/field.cc
@@ -4567,9 +4567,11 @@ void Field_blob::get_key_image(char *buff,uint length, CHARSET_INFO *cs,imagetyp
 
   if ((uint32) length > blob_length)
   {
-#ifdef HAVE_purify
+    /*
+      Must clear this as we do a memcmp in opt_range.cc to detect
+      identical keys
+    */
     bzero(buff+2+blob_length, (length-blob_length));
-#endif
     length=(uint) blob_length;
   }
   int2store(buff,length);