Write UNION() for MERGE tables

scripts/safe_mysqld.sh

@@ -72,6 +72,10 @@ then
   MY_BASEDIR_VERSION=$MY_PWD		# Where bin, share and data are
   ledir=$MY_BASEDIR_VERSION/bin		# Where mysqld is
   DATADIR=$MY_BASEDIR_VERSION/data
+  if test -z "defaults"
+  then
+    defaults="--defaults-extra-file=$MY_BASEDIR_VERSION/data/my.cnf"
+  fi
 # Check if this is a 'moved install directory'
 elif test -f ./var/mysql/db.frm -a -f ./share/mysql/english/errmsg.sys -a \
  -x ./libexec/mysqld